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Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/…

…git/cooloney/linux-leds

Pull LED subsystem update from Bryan Wu.

* 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/linux-leds: (61 commits)
  leds: leds-sunfire: use dev_err()/pr_err() instead of printk()
  leds: 88pm860x: Add missing of_node_put()
  leds: tca6507: Use of_get_child_count()
  leds: leds-pwm: make it depend on PWM and not HAVE_PWM
  Documentation: leds: update LP55xx family devices
  leds-lp55xx: fix problem on removing LED attributes
  leds-lp5521/5523: add author and copyright description
  leds-lp5521/5523: use new lp55xx common header
  leds-lp55xx: clean up headers
  leds-lp55xx: clean up definitions
  leds-lp55xx: clean up unused data and functions
  leds-lp55xx: clean up _remove()
  leds-lp55xx: add new function for removing device attribtues
  leds-lp55xx: code refactoring on selftest function
  leds-lp55xx: use common device attribute driver function
  leds-lp55xx: support device specific attributes
  leds-lp5523: use generic firmware interface
  leds-lp5521: use generic firmware interface
  leds-lp55xx: support firmware interface
  leds-lp55xx: add new lp55xx_register_sysfs() for the firmware interface
  ...
  • Loading branch information...
commit 0512c04a2b5d29a33d96d315e1d14c55f5148aa7 2 parents 5115f3c + 4b07c5d
@torvalds authored
Showing with 1,803 additions and 1,787 deletions.
  1. +48 −0 Documentation/devicetree/bindings/leds/leds-pwm.txt
  2. +33 −0 Documentation/devicetree/bindings/leds/tca6507.txt
  3. +2 −0  Documentation/leds/00-INDEX
  4. +7 −56 Documentation/leds/leds-lp5521.txt
  5. +5 −22 Documentation/leds/leds-lp5523.txt
  6. +118 −0 Documentation/leds/leds-lp55xx.txt
  7. +4 −4 arch/arm/mach-omap2/board-rx51-peripherals.c
  8. +7 −7 arch/arm/mach-ux500/board-mop500.c
  9. +11 −1 drivers/leds/Kconfig
  10. +1 −0  drivers/leds/Makefile
  11. +4 −1 drivers/leds/leds-88pm860x.c
  12. +40 −18 drivers/leds/leds-lm3530.c
  13. +1 −1  drivers/leds/leds-lm355x.c
  14. +2 −2 drivers/leds/leds-lm3642.c
  15. +263 −681 drivers/leds/leds-lp5521.c
  16. +257 −793 drivers/leds/leds-lp5523.c
  17. +523 −0 drivers/leds/leds-lp55xx-common.c
  18. +134 −0 drivers/leds/leds-lp55xx-common.h
  19. +5 −4 drivers/leds/leds-lp8788.c
  20. +2 −4 drivers/leds/leds-pca9532.c
  21. +111 −41 drivers/leds/leds-pwm.c
  22. +6 −6 drivers/leds/leds-renesas-tpu.c
  23. +1 −2  drivers/leds/leds-ss4200.c
  24. +9 −10 drivers/leds/leds-sunfire.c
  25. +68 −4 drivers/leds/leds-tca6507.c
  26. +1 −1  drivers/leds/leds-wm831x-status.c
  27. +34 −4 drivers/pwm/core.c
  28. +0 −73 include/linux/leds-lp5521.h
  29. +0 −49 include/linux/leds-lp5523.h
  30. +1 −1  include/linux/leds_pwm.h
  31. +87 −0 include/linux/platform_data/leds-lp55xx.h
  32. +18 −2 include/linux/pwm.h
View
48 Documentation/devicetree/bindings/leds/leds-pwm.txt
@@ -0,0 +1,48 @@
+LED connected to PWM
+
+Required properties:
+- compatible : should be "pwm-leds".
+
+Each LED is represented as a sub-node of the pwm-leds device. Each
+node's name represents the name of the corresponding LED.
+
+LED sub-node properties:
+- pwms : PWM property to point to the PWM device (phandle)/port (id) and to
+ specify the period time to be used: <&phandle id period_ns>;
+- pwm-names : (optional) Name to be used by the PWM subsystem for the PWM device
+ For the pwms and pwm-names property please refer to:
+ Documentation/devicetree/bindings/pwm/pwm.txt
+- max-brightness : Maximum brightness possible for the LED
+- label : (optional)
+ see Documentation/devicetree/bindings/leds/common.txt
+- linux,default-trigger : (optional)
+ see Documentation/devicetree/bindings/leds/common.txt
+
+Example:
+
+twl_pwm: pwm {
+ /* provides two PWMs (id 0, 1 for PWM1 and PWM2) */
+ compatible = "ti,twl6030-pwm";
+ #pwm-cells = <2>;
+};
+
+twl_pwmled: pwmled {
+ /* provides one PWM (id 0 for Charing indicator LED) */
+ compatible = "ti,twl6030-pwmled";
+ #pwm-cells = <2>;
+};
+
+pwmleds {
+ compatible = "pwm-leds";
+ kpad {
+ label = "omap4::keypad";
+ pwms = <&twl_pwm 0 7812500>;
+ max-brightness = <127>;
+ };
+
+ charging {
+ label = "omap4:green:chrg";
+ pwms = <&twl_pwmled 0 7812500>;
+ max-brightness = <255>;
+ };
+};
View
33 Documentation/devicetree/bindings/leds/tca6507.txt
@@ -0,0 +1,33 @@
+LEDs conected to tca6507
+
+Required properties:
+- compatible : should be : "ti,tca6507".
+
+Each led is represented as a sub-node of the ti,tca6507 device.
+
+LED sub-node properties:
+- label : (optional) see Documentation/devicetree/bindings/leds/common.txt
+- reg : number of LED line (could be from 0 to 6)
+- linux,default-trigger : (optional)
+ see Documentation/devicetree/bindings/leds/common.txt
+
+Examples:
+
+tca6507@45 {
+ compatible = "ti,tca6507";
+ #address-cells = <1>;
+ #size-cells = <0>;
+ reg = <0x45>;
+
+ led0: red-aux@0 {
+ label = "red:aux";
+ reg = <0x0>;
+ };
+
+ led1: green-aux@1 {
+ label = "green:aux";
+ reg = <0x5>;
+ linux,default-trigger = "default-on";
+ };
+};
+
View
2  Documentation/leds/00-INDEX
@@ -6,5 +6,7 @@ leds-lp5521.txt
- notes on how to use the leds-lp5521 driver.
leds-lp5523.txt
- notes on how to use the leds-lp5523 driver.
+leds-lp55xx.txt
+ - description about lp55xx common driver.
leds-lm3556.txt
- notes on how to use the leds-lm3556 driver.
View
63 Documentation/leds/leds-lp5521.txt
@@ -17,19 +17,8 @@ lp5521:channelx, where x is 0 .. 2
All three channels can be also controlled using the engine micro programs.
More details of the instructions can be found from the public data sheet.
-Control interface for the engines:
-x is 1 .. 3
-enginex_mode : disabled, load, run
-enginex_load : store program (visible only in engine load mode)
-
-Example (start to blink the channel 2 led):
-cd /sys/class/leds/lp5521:channel2/device
-echo "load" > engine3_mode
-echo "037f4d0003ff6000" > engine3_load
-echo "run" > engine3_mode
-
-stop the engine:
-echo "disabled" > engine3_mode
+LP5521 has the internal program memory for running various LED patterns.
+For the details, please refer to 'firmware' section in leds-lp55xx.txt
sysfs contains a selftest entry.
The test communicates with the chip and checks that
@@ -47,7 +36,7 @@ The name of each channel can be configurable.
If the name field is not defined, the default name will be set to 'xxxx:channelN'
(XXXX : pdata->label or i2c client name, N : channel number)
-static struct lp5521_led_config lp5521_led_config[] = {
+static struct lp55xx_led_config lp5521_led_config[] = {
{
.name = "red",
.chan_nr = 0,
@@ -81,10 +70,10 @@ static void lp5521_enable(bool state)
/* Control of chip enable signal */
}
-static struct lp5521_platform_data lp5521_platform_data = {
+static struct lp55xx_platform_data lp5521_platform_data = {
.led_config = lp5521_led_config,
.num_channels = ARRAY_SIZE(lp5521_led_config),
- .clock_mode = LP5521_CLOCK_EXT,
+ .clock_mode = LP55XX_CLOCK_EXT,
.setup_resources = lp5521_setup,
.release_resources = lp5521_release,
.enable = lp5521_enable,
@@ -105,47 +94,9 @@ example of update_config :
LP5521_CP_MODE_AUTO | LP5521_R_TO_BATT | \
LP5521_CLK_INT)
-static struct lp5521_platform_data lp5521_pdata = {
+static struct lp55xx_platform_data lp5521_pdata = {
.led_config = lp5521_led_config,
.num_channels = ARRAY_SIZE(lp5521_led_config),
- .clock_mode = LP5521_CLOCK_INT,
+ .clock_mode = LP55XX_CLOCK_INT,
.update_config = LP5521_CONFIGS,
};
-
-LED patterns : LP5521 has autonomous operation without external control.
-Pattern data can be defined in the platform data.
-
-example of led pattern data :
-
-/* RGB(50,5,0) 500ms on, 500ms off, infinite loop */
-static u8 pattern_red[] = {
- 0x40, 0x32, 0x60, 0x00, 0x40, 0x00, 0x60, 0x00,
- };
-
-static u8 pattern_green[] = {
- 0x40, 0x05, 0x60, 0x00, 0x40, 0x00, 0x60, 0x00,
- };
-
-static struct lp5521_led_pattern board_led_patterns[] = {
- {
- .r = pattern_red,
- .g = pattern_green,
- .size_r = ARRAY_SIZE(pattern_red),
- .size_g = ARRAY_SIZE(pattern_green),
- },
-};
-
-static struct lp5521_platform_data lp5521_platform_data = {
- .led_config = lp5521_led_config,
- .num_channels = ARRAY_SIZE(lp5521_led_config),
- .clock_mode = LP5521_CLOCK_EXT,
- .patterns = board_led_patterns,
- .num_patterns = ARRAY_SIZE(board_led_patterns),
-};
-
-Then predefined led pattern(s) can be executed via the sysfs.
-To start the pattern #1,
-# echo 1 > /sys/bus/i2c/devices/xxxx/led_pattern
-(xxxx : i2c bus & slave address)
-To end the pattern,
-# echo 0 > /sys/bus/i2c/devices/xxxx/led_pattern
View
27 Documentation/leds/leds-lp5523.txt
@@ -27,25 +27,8 @@ c) Default
If both fields are NULL, 'lp5523' is used by default.
/sys/class/leds/lp5523:channelN (N: 0 ~ 8)
-The chip provides 3 engines. Each engine can control channels without
-interaction from the main CPU. Details of the micro engine code can be found
-from the public data sheet. Leds can be muxed to different channels.
-
-Control interface for the engines:
-x is 1 .. 3
-enginex_mode : disabled, load, run
-enginex_load : microcode load (visible only in load mode)
-enginex_leds : led mux control (visible only in load mode)
-
-cd /sys/class/leds/lp5523:channel2/device
-echo "load" > engine3_mode
-echo "9d80400004ff05ff437f0000" > engine3_load
-echo "111111111" > engine3_leds
-echo "run" > engine3_mode
-
-sysfs contains a selftest entry. It measures each channel
-voltage level and checks if it looks reasonable. If the level is too high,
-the led is missing; if the level is too low, there is a short circuit.
+LP5523 has the internal program memory for running various LED patterns.
+For the details, please refer to 'firmware' section in leds-lp55xx.txt
Selftest uses always the current from the platform data.
@@ -58,7 +41,7 @@ Example platform data:
Note - chan_nr can have values between 0 and 8.
-static struct lp5523_led_config lp5523_led_config[] = {
+static struct lp55xx_led_config lp5523_led_config[] = {
{
.name = "D1",
.chan_nr = 0,
@@ -88,10 +71,10 @@ static void lp5523_enable(bool state)
/* Control chip enable signal */
}
-static struct lp5523_platform_data lp5523_platform_data = {
+static struct lp55xx_platform_data lp5523_platform_data = {
.led_config = lp5523_led_config,
.num_channels = ARRAY_SIZE(lp5523_led_config),
- .clock_mode = LP5523_CLOCK_EXT,
+ .clock_mode = LP55XX_CLOCK_EXT,
.setup_resources = lp5523_setup,
.release_resources = lp5523_release,
.enable = lp5523_enable,
View
118 Documentation/leds/leds-lp55xx.txt
@@ -0,0 +1,118 @@
+LP5521/LP5523/LP55231 Common Driver
+===================================
+
+Authors: Milo(Woogyom) Kim <milo.kim@ti.com>
+
+Description
+-----------
+LP5521, LP5523/55231 have common features as below.
+
+ Register access via the I2C
+ Device initialization/deinitialization
+ Create LED class devices for multiple output channels
+ Device attributes for user-space interface
+ Program memory for running LED patterns
+
+The LP55xx common driver provides these features using exported functions.
+ lp55xx_init_device() / lp55xx_deinit_device()
+ lp55xx_register_leds() / lp55xx_unregister_leds()
+ lp55xx_regsister_sysfs() / lp55xx_unregister_sysfs()
+
+( Driver Structure Data )
+
+In lp55xx common driver, two different data structure is used.
+
+o lp55xx_led
+ control multi output LED channels such as led current, channel index.
+o lp55xx_chip
+ general chip control such like the I2C and platform data.
+
+For example, LP5521 has maximum 3 LED channels.
+LP5523/55231 has 9 output channels.
+
+lp55xx_chip for LP5521 ... lp55xx_led #1
+ lp55xx_led #2
+ lp55xx_led #3
+
+lp55xx_chip for LP5523 ... lp55xx_led #1
+ lp55xx_led #2
+ .
+ .
+ lp55xx_led #9
+
+( Chip Dependent Code )
+
+To support device specific configurations, special structure
+'lpxx_device_config' is used.
+
+ Maximum number of channels
+ Reset command, chip enable command
+ Chip specific initialization
+ Brightness control register access
+ Setting LED output current
+ Program memory address access for running patterns
+ Additional device specific attributes
+
+( Firmware Interface )
+
+LP55xx family devices have the internal program memory for running
+various LED patterns.
+This pattern data is saved as a file in the user-land or
+hex byte string is written into the memory through the I2C.
+LP55xx common driver supports the firmware interface.
+
+LP55xx chips have three program engines.
+To load and run the pattern, the programming sequence is following.
+ (1) Select an engine number (1/2/3)
+ (2) Mode change to load
+ (3) Write pattern data into selected area
+ (4) Mode change to run
+
+The LP55xx common driver provides simple interfaces as below.
+select_engine : Select which engine is used for running program
+run_engine : Start program which is loaded via the firmware interface
+firmware : Load program data
+
+For example, run blinking pattern in engine #1 of LP5521
+echo 1 > /sys/bus/i2c/devices/xxxx/select_engine
+echo 1 > /sys/class/firmware/lp5521/loading
+echo "4000600040FF6000" > /sys/class/firmware/lp5521/data
+echo 0 > /sys/class/firmware/lp5521/loading
+echo 1 > /sys/bus/i2c/devices/xxxx/run_engine
+
+For example, run blinking pattern in engine #3 of LP55231
+echo 3 > /sys/bus/i2c/devices/xxxx/select_engine
+echo 1 > /sys/class/firmware/lp55231/loading
+echo "9d0740ff7e0040007e00a0010000" > /sys/class/firmware/lp55231/data
+echo 0 > /sys/class/firmware/lp55231/loading
+echo 1 > /sys/bus/i2c/devices/xxxx/run_engine
+
+To start blinking patterns in engine #2 and #3 simultaneously,
+for idx in 2 3
+do
+ echo $idx > /sys/class/leds/red/device/select_engine
+ sleep 0.1
+ echo 1 > /sys/class/firmware/lp5521/loading
+ echo "4000600040FF6000" > /sys/class/firmware/lp5521/data
+ echo 0 > /sys/class/firmware/lp5521/loading
+done
+echo 1 > /sys/class/leds/red/device/run_engine
+
+Here is another example for LP5523.
+echo 2 > /sys/bus/i2c/devices/xxxx/select_engine
+echo 1 > /sys/class/firmware/lp5523/loading
+echo "9d80400004ff05ff437f0000" > /sys/class/firmware/lp5523/data
+echo 0 > /sys/class/firmware/lp5523/loading
+echo 1 > /sys/bus/i2c/devices/xxxx/run_engine
+
+As soon as 'loading' is set to 0, registered callback is called.
+Inside the callback, the selected engine is loaded and memory is updated.
+To run programmed pattern, 'run_engine' attribute should be enabled.
+
+( 'run_engine' and 'firmware_cb' )
+The sequence of running the program data is common.
+But each device has own specific register addresses for commands.
+To support this, 'run_engine' and 'firmware_cb' are configurable in each driver.
+run_engine : Control the selected engine
+firmware_cb : The callback function after loading the firmware is done.
+ Chip specific commands for loading and updating program memory.
View
8 arch/arm/mach-omap2/board-rx51-peripherals.c
@@ -40,7 +40,7 @@
#include <sound/tpa6130a2-plat.h>
#include <media/radio-si4713.h>
#include <media/si4713.h>
-#include <linux/leds-lp5523.h>
+#include <linux/platform_data/leds-lp55xx.h>
#include <linux/platform_data/tsl2563.h>
#include <linux/lis3lv02d.h>
@@ -160,7 +160,7 @@ static struct tsl2563_platform_data rx51_tsl2563_platform_data = {
#endif
#if defined(CONFIG_LEDS_LP5523) || defined(CONFIG_LEDS_LP5523_MODULE)
-static struct lp5523_led_config rx51_lp5523_led_config[] = {
+static struct lp55xx_led_config rx51_lp5523_led_config[] = {
{
.name = "lp5523:kb1",
.chan_nr = 0,
@@ -216,10 +216,10 @@ static void rx51_lp5523_enable(bool state)
gpio_set_value(RX51_LP5523_CHIP_EN_GPIO, !!state);
}
-static struct lp5523_platform_data rx51_lp5523_platform_data = {
+static struct lp55xx_platform_data rx51_lp5523_platform_data = {
.led_config = rx51_lp5523_led_config,
.num_channels = ARRAY_SIZE(rx51_lp5523_led_config),
- .clock_mode = LP5523_CLOCK_AUTO,
+ .clock_mode = LP55XX_CLOCK_AUTO,
.setup_resources = rx51_lp5523_setup,
.release_resources = rx51_lp5523_release,
.enable = rx51_lp5523_enable,
View
14 arch/arm/mach-ux500/board-mop500.c
@@ -28,7 +28,7 @@
#include <linux/mfd/tps6105x.h>
#include <linux/mfd/abx500/ab8500-gpio.h>
#include <linux/mfd/abx500/ab8500-codec.h>
-#include <linux/leds-lp5521.h>
+#include <linux/platform_data/leds-lp55xx.h>
#include <linux/input.h>
#include <linux/smsc911x.h>
#include <linux/gpio_keys.h>
@@ -301,7 +301,7 @@ static struct tc3589x_platform_data mop500_tc35892_data = {
.irq_base = MOP500_EGPIO_IRQ_BASE,
};
-static struct lp5521_led_config lp5521_pri_led[] = {
+static struct lp55xx_led_config lp5521_pri_led[] = {
[0] = {
.chan_nr = 0,
.led_current = 0x2f,
@@ -319,14 +319,14 @@ static struct lp5521_led_config lp5521_pri_led[] = {
},
};
-static struct lp5521_platform_data __initdata lp5521_pri_data = {
+static struct lp55xx_platform_data __initdata lp5521_pri_data = {
.label = "lp5521_pri",
.led_config = &lp5521_pri_led[0],
.num_channels = 3,
- .clock_mode = LP5521_CLOCK_EXT,
+ .clock_mode = LP55XX_CLOCK_EXT,
};
-static struct lp5521_led_config lp5521_sec_led[] = {
+static struct lp55xx_led_config lp5521_sec_led[] = {
[0] = {
.chan_nr = 0,
.led_current = 0x2f,
@@ -344,11 +344,11 @@ static struct lp5521_led_config lp5521_sec_led[] = {
},
};
-static struct lp5521_platform_data __initdata lp5521_sec_data = {
+static struct lp55xx_platform_data __initdata lp5521_sec_data = {
.label = "lp5521_sec",
.led_config = &lp5521_sec_led[0],
.num_channels = 3,
- .clock_mode = LP5521_CLOCK_EXT,
+ .clock_mode = LP55XX_CLOCK_EXT,
};
static struct i2c_board_info __initdata mop500_i2c0_devices[] = {
View
12 drivers/leds/Kconfig
@@ -193,9 +193,18 @@ config LEDS_LP3944
To compile this driver as a module, choose M here: the
module will be called leds-lp3944.
+config LEDS_LP55XX_COMMON
+ tristate "Common Driver for TI/National LP5521 and LP5523/55231"
+ depends on LEDS_LP5521 || LEDS_LP5523
+ select FW_LOADER
+ help
+ This option supports common operations for LP5521 and LP5523/55231
+ devices.
+
config LEDS_LP5521
tristate "LED Support for N.S. LP5521 LED driver chip"
depends on LEDS_CLASS && I2C
+ select LEDS_LP55XX_COMMON
help
If you say yes here you get support for the National Semiconductor
LP5521 LED driver. It is 3 channel chip with programmable engines.
@@ -205,6 +214,7 @@ config LEDS_LP5521
config LEDS_LP5523
tristate "LED Support for TI/National LP5523/55231 LED driver chip"
depends on LEDS_CLASS && I2C
+ select LEDS_LP55XX_COMMON
help
If you say yes here you get support for TI/National Semiconductor
LP5523/55231 LED driver.
@@ -310,7 +320,7 @@ config LEDS_DAC124S085
config LEDS_PWM
tristate "PWM driven LED Support"
depends on LEDS_CLASS
- depends on HAVE_PWM
+ depends on PWM
help
This option enables support for pwm driven LEDs
View
1  drivers/leds/Makefile
@@ -23,6 +23,7 @@ obj-$(CONFIG_LEDS_PCA9532) += leds-pca9532.o
obj-$(CONFIG_LEDS_GPIO_REGISTER) += leds-gpio-register.o
obj-$(CONFIG_LEDS_GPIO) += leds-gpio.o
obj-$(CONFIG_LEDS_LP3944) += leds-lp3944.o
+obj-$(CONFIG_LEDS_LP55XX_COMMON) += leds-lp55xx-common.o
obj-$(CONFIG_LEDS_LP5521) += leds-lp5521.o
obj-$(CONFIG_LEDS_LP5523) += leds-lp5523.o
obj-$(CONFIG_LEDS_LP8788) += leds-lp8788.o
View
5 drivers/leds/leds-88pm860x.c
@@ -128,8 +128,10 @@ static void pm860x_led_set(struct led_classdev *cdev,
static int pm860x_led_dt_init(struct platform_device *pdev,
struct pm860x_led *data)
{
- struct device_node *nproot = pdev->dev.parent->of_node, *np;
+ struct device_node *nproot, *np;
int iset = 0;
+
+ nproot = of_node_get(pdev->dev.parent->of_node);
if (!nproot)
return -ENODEV;
nproot = of_find_node_by_name(nproot, "leds");
@@ -145,6 +147,7 @@ static int pm860x_led_dt_init(struct platform_device *pdev,
break;
}
}
+ of_node_put(nproot);
return 0;
}
#else
View
58 drivers/leds/leds-lm3530.c
@@ -187,6 +187,40 @@ static void lm3530_als_configure(struct lm3530_platform_data *pdata,
(pdata->als2_resistor_sel << LM3530_ALS2_IMP_SHIFT);
}
+static int lm3530_led_enable(struct lm3530_data *drvdata)
+{
+ int ret;
+
+ if (drvdata->enable)
+ return 0;
+
+ ret = regulator_enable(drvdata->regulator);
+ if (ret) {
+ dev_err(drvdata->led_dev.dev, "Failed to enable vin:%d\n", ret);
+ return ret;
+ }
+
+ drvdata->enable = true;
+ return 0;
+}
+
+static void lm3530_led_disable(struct lm3530_data *drvdata)
+{
+ int ret;
+
+ if (!drvdata->enable)
+ return;
+
+ ret = regulator_disable(drvdata->regulator);
+ if (ret) {
+ dev_err(drvdata->led_dev.dev, "Failed to disable vin:%d\n",
+ ret);
+ return;
+ }
+
+ drvdata->enable = false;
+}
+
static int lm3530_init_registers(struct lm3530_data *drvdata)
{
int ret = 0;
@@ -245,15 +279,9 @@ static int lm3530_init_registers(struct lm3530_data *drvdata)
reg_val[12] = LM3530_DEF_ZT_3; /* LM3530_ALS_Z3T_REG */
reg_val[13] = LM3530_DEF_ZT_4; /* LM3530_ALS_Z4T_REG */
- if (!drvdata->enable) {
- ret = regulator_enable(drvdata->regulator);
- if (ret) {
- dev_err(&drvdata->client->dev,
- "Enable regulator failed\n");
- return ret;
- }
- drvdata->enable = true;
- }
+ ret = lm3530_led_enable(drvdata);
+ if (ret)
+ return ret;
for (i = 0; i < LM3530_REG_MAX; i++) {
/* do not update brightness register when pwm mode */
@@ -305,13 +333,8 @@ static void lm3530_brightness_set(struct led_classdev *led_cdev,
else
drvdata->brightness = brt_val;
- if (brt_val == 0) {
- err = regulator_disable(drvdata->regulator);
- if (err)
- dev_err(&drvdata->client->dev,
- "Disable regulator failed\n");
- drvdata->enable = false;
- }
+ if (brt_val == 0)
+ lm3530_led_disable(drvdata);
break;
case LM3530_BL_MODE_ALS:
break;
@@ -458,8 +481,7 @@ static int lm3530_remove(struct i2c_client *client)
device_remove_file(drvdata->led_dev.dev, &dev_attr_mode);
- if (drvdata->enable)
- regulator_disable(drvdata->regulator);
+ lm3530_led_disable(drvdata);
led_classdev_unregister(&drvdata->led_dev);
return 0;
}
View
2  drivers/leds/leds-lm355x.c
@@ -380,7 +380,7 @@ static void lm355x_indicator_brightness_set(struct led_classdev *cdev,
/* indicator pattern only for lm3556*/
static ssize_t lm3556_indicator_pattern_store(struct device *dev,
- struct device_attribute *devAttr,
+ struct device_attribute *attr,
const char *buf, size_t size)
{
ssize_t ret;
View
4 drivers/leds/leds-lm3642.c
@@ -176,7 +176,7 @@ static int lm3642_control(struct lm3642_chip_data *chip,
/* torch pin config for lm3642*/
static ssize_t lm3642_torch_pin_store(struct device *dev,
- struct device_attribute *devAttr,
+ struct device_attribute *attr,
const char *buf, size_t size)
{
ssize_t ret;
@@ -233,7 +233,7 @@ static void lm3642_torch_brightness_set(struct led_classdev *cdev,
/* strobe pin config for lm3642*/
static ssize_t lm3642_strobe_pin_store(struct device *dev,
- struct device_attribute *devAttr,
+ struct device_attribute *attr,
const char *buf, size_t size)
{
ssize_t ret;
View
944 drivers/leds/leds-lp5521.c
@@ -2,8 +2,10 @@
* LP5521 LED chip driver.
*
* Copyright (C) 2010 Nokia Corporation
+ * Copyright (C) 2012 Texas Instruments
*
* Contact: Samu Onkalo <samu.p.onkalo@nokia.com>
+ * Milo(Woogyom) Kim <milo.kim@ti.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
@@ -20,33 +22,21 @@
* 02110-1301 USA
*/
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/i2c.h>
-#include <linux/mutex.h>
-#include <linux/gpio.h>
-#include <linux/interrupt.h>
#include <linux/delay.h>
-#include <linux/ctype.h>
-#include <linux/spinlock.h>
-#include <linux/wait.h>
+#include <linux/firmware.h>
+#include <linux/i2c.h>
+#include <linux/init.h>
#include <linux/leds.h>
-#include <linux/leds-lp5521.h>
-#include <linux/workqueue.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/platform_data/leds-lp55xx.h>
#include <linux/slab.h>
-#define LP5521_PROGRAM_LENGTH 32 /* in bytes */
-
-#define LP5521_MAX_LEDS 3 /* Maximum number of LEDs */
-#define LP5521_MAX_ENGINES 3 /* Maximum number of engines */
-
-#define LP5521_ENG_MASK_BASE 0x30 /* 00110000 */
-#define LP5521_ENG_STATUS_MASK 0x07 /* 00000111 */
+#include "leds-lp55xx-common.h"
-#define LP5521_CMD_LOAD 0x15 /* 00010101 */
-#define LP5521_CMD_RUN 0x2a /* 00101010 */
-#define LP5521_CMD_DIRECT 0x3f /* 00111111 */
-#define LP5521_CMD_DISABLED 0x00 /* 00000000 */
+#define LP5521_PROGRAM_LENGTH 32
+#define LP5521_MAX_LEDS 3
+#define LP5521_CMD_DIRECT 0x3F
/* Registers */
#define LP5521_REG_ENABLE 0x00
@@ -58,22 +48,14 @@
#define LP5521_REG_G_CURRENT 0x06
#define LP5521_REG_B_CURRENT 0x07
#define LP5521_REG_CONFIG 0x08
-#define LP5521_REG_R_CHANNEL_PC 0x09
-#define LP5521_REG_G_CHANNEL_PC 0x0A
-#define LP5521_REG_B_CHANNEL_PC 0x0B
#define LP5521_REG_STATUS 0x0C
#define LP5521_REG_RESET 0x0D
-#define LP5521_REG_GPO 0x0E
#define LP5521_REG_R_PROG_MEM 0x10
#define LP5521_REG_G_PROG_MEM 0x30
#define LP5521_REG_B_PROG_MEM 0x50
-#define LP5521_PROG_MEM_BASE LP5521_REG_R_PROG_MEM
-#define LP5521_PROG_MEM_SIZE 0x20
-
/* Base register to set LED current */
#define LP5521_REG_LED_CURRENT_BASE LP5521_REG_R_CURRENT
-
/* Base register to set the brightness */
#define LP5521_REG_LED_PWM_BASE LP5521_REG_R_PWM
@@ -92,440 +74,287 @@
/* default R channel current register value */
#define LP5521_REG_R_CURR_DEFAULT 0xAF
-/* Pattern Mode */
-#define PATTERN_OFF 0
+/* Reset register value */
+#define LP5521_RESET 0xFF
-struct lp5521_engine {
- int id;
- u8 mode;
- u8 prog_page;
- u8 engine_mask;
-};
+/* Program Memory Operations */
+#define LP5521_MODE_R_M 0x30 /* Operation Mode Register */
+#define LP5521_MODE_G_M 0x0C
+#define LP5521_MODE_B_M 0x03
+#define LP5521_LOAD_R 0x10
+#define LP5521_LOAD_G 0x04
+#define LP5521_LOAD_B 0x01
-struct lp5521_led {
- int id;
- u8 chan_nr;
- u8 led_current;
- u8 max_current;
- struct led_classdev cdev;
- struct work_struct brightness_work;
- u8 brightness;
-};
+#define LP5521_R_IS_LOADING(mode) \
+ ((mode & LP5521_MODE_R_M) == LP5521_LOAD_R)
+#define LP5521_G_IS_LOADING(mode) \
+ ((mode & LP5521_MODE_G_M) == LP5521_LOAD_G)
+#define LP5521_B_IS_LOADING(mode) \
+ ((mode & LP5521_MODE_B_M) == LP5521_LOAD_B)
-struct lp5521_chip {
- struct lp5521_platform_data *pdata;
- struct mutex lock; /* Serialize control */
- struct i2c_client *client;
- struct lp5521_engine engines[LP5521_MAX_ENGINES];
- struct lp5521_led leds[LP5521_MAX_LEDS];
- u8 num_channels;
- u8 num_leds;
-};
+#define LP5521_EXEC_R_M 0x30 /* Enable Register */
+#define LP5521_EXEC_G_M 0x0C
+#define LP5521_EXEC_B_M 0x03
+#define LP5521_EXEC_M 0x3F
+#define LP5521_RUN_R 0x20
+#define LP5521_RUN_G 0x08
+#define LP5521_RUN_B 0x02
-static inline struct lp5521_led *cdev_to_led(struct led_classdev *cdev)
+static inline void lp5521_wait_opmode_done(void)
{
- return container_of(cdev, struct lp5521_led, cdev);
+ /* operation mode change needs to be longer than 153 us */
+ usleep_range(200, 300);
}
-static inline struct lp5521_chip *engine_to_lp5521(struct lp5521_engine *engine)
+static inline void lp5521_wait_enable_done(void)
{
- return container_of(engine, struct lp5521_chip,
- engines[engine->id - 1]);
+ /* it takes more 488 us to update ENABLE register */
+ usleep_range(500, 600);
}
-static inline struct lp5521_chip *led_to_lp5521(struct lp5521_led *led)
+static void lp5521_set_led_current(struct lp55xx_led *led, u8 led_current)
{
- return container_of(led, struct lp5521_chip,
- leds[led->id]);
+ led->led_current = led_current;
+ lp55xx_write(led->chip, LP5521_REG_LED_CURRENT_BASE + led->chan_nr,
+ led_current);
}
-static void lp5521_led_brightness_work(struct work_struct *work);
-
-static inline int lp5521_write(struct i2c_client *client, u8 reg, u8 value)
+static void lp5521_load_engine(struct lp55xx_chip *chip)
{
- return i2c_smbus_write_byte_data(client, reg, value);
-}
+ enum lp55xx_engine_index idx = chip->engine_idx;
+ u8 mask[] = {
+ [LP55XX_ENGINE_1] = LP5521_MODE_R_M,
+ [LP55XX_ENGINE_2] = LP5521_MODE_G_M,
+ [LP55XX_ENGINE_3] = LP5521_MODE_B_M,
+ };
-static int lp5521_read(struct i2c_client *client, u8 reg, u8 *buf)
-{
- s32 ret;
+ u8 val[] = {
+ [LP55XX_ENGINE_1] = LP5521_LOAD_R,
+ [LP55XX_ENGINE_2] = LP5521_LOAD_G,
+ [LP55XX_ENGINE_3] = LP5521_LOAD_B,
+ };
- ret = i2c_smbus_read_byte_data(client, reg);
- if (ret < 0)
- return ret;
+ lp55xx_update_bits(chip, LP5521_REG_OP_MODE, mask[idx], val[idx]);
- *buf = ret;
- return 0;
+ lp5521_wait_opmode_done();
}
-static int lp5521_set_engine_mode(struct lp5521_engine *engine, u8 mode)
+static void lp5521_stop_engine(struct lp55xx_chip *chip)
{
- struct lp5521_chip *chip = engine_to_lp5521(engine);
- struct i2c_client *client = chip->client;
- int ret;
- u8 engine_state;
-
- /* Only transition between RUN and DIRECT mode are handled here */
- if (mode == LP5521_CMD_LOAD)
- return 0;
-
- if (mode == LP5521_CMD_DISABLED)
- mode = LP5521_CMD_DIRECT;
-
- ret = lp5521_read(client, LP5521_REG_OP_MODE, &engine_state);
- if (ret < 0)
- return ret;
-
- /* set mode only for this engine */
- engine_state &= ~(engine->engine_mask);
- mode &= engine->engine_mask;
- engine_state |= mode;
- return lp5521_write(client, LP5521_REG_OP_MODE, engine_state);
+ lp55xx_write(chip, LP5521_REG_OP_MODE, 0);
+ lp5521_wait_opmode_done();
}
-static int lp5521_load_program(struct lp5521_engine *eng, const u8 *pattern)
+static void lp5521_run_engine(struct lp55xx_chip *chip, bool start)
{
- struct lp5521_chip *chip = engine_to_lp5521(eng);
- struct i2c_client *client = chip->client;
int ret;
- int addr;
u8 mode;
+ u8 exec;
- /* move current engine to direct mode and remember the state */
- ret = lp5521_set_engine_mode(eng, LP5521_CMD_DIRECT);
- if (ret)
- return ret;
-
- /* Mode change requires min 500 us delay. 1 - 2 ms with margin */
- usleep_range(1000, 2000);
- ret = lp5521_read(client, LP5521_REG_OP_MODE, &mode);
- if (ret)
- return ret;
-
- /* For loading, all the engines to load mode */
- lp5521_write(client, LP5521_REG_OP_MODE, LP5521_CMD_DIRECT);
- /* Mode change requires min 500 us delay. 1 - 2 ms with margin */
- usleep_range(1000, 2000);
- lp5521_write(client, LP5521_REG_OP_MODE, LP5521_CMD_LOAD);
- /* Mode change requires min 500 us delay. 1 - 2 ms with margin */
- usleep_range(1000, 2000);
-
- addr = LP5521_PROG_MEM_BASE + eng->prog_page * LP5521_PROG_MEM_SIZE;
- i2c_smbus_write_i2c_block_data(client,
- addr,
- LP5521_PROG_MEM_SIZE,
- pattern);
-
- return lp5521_write(client, LP5521_REG_OP_MODE, mode);
-}
-
-static int lp5521_set_led_current(struct lp5521_chip *chip, int led, u8 curr)
-{
- return lp5521_write(chip->client,
- LP5521_REG_LED_CURRENT_BASE + chip->leds[led].chan_nr,
- curr);
-}
-
-static void lp5521_init_engine(struct lp5521_chip *chip)
-{
- int i;
- for (i = 0; i < ARRAY_SIZE(chip->engines); i++) {
- chip->engines[i].id = i + 1;
- chip->engines[i].engine_mask = LP5521_ENG_MASK_BASE >> (i * 2);
- chip->engines[i].prog_page = i;
+ /* stop engine */
+ if (!start) {
+ lp5521_stop_engine(chip);
+ lp55xx_write(chip, LP5521_REG_OP_MODE, LP5521_CMD_DIRECT);
+ lp5521_wait_opmode_done();
+ return;
}
-}
-
-static int lp5521_configure(struct i2c_client *client)
-{
- struct lp5521_chip *chip = i2c_get_clientdata(client);
- int ret;
- u8 cfg;
-
- lp5521_init_engine(chip);
-
- /* Set all PWMs to direct control mode */
- ret = lp5521_write(client, LP5521_REG_OP_MODE, LP5521_CMD_DIRECT);
-
- cfg = chip->pdata->update_config ?
- : (LP5521_PWRSAVE_EN | LP5521_CP_MODE_AUTO | LP5521_R_TO_BATT);
- ret |= lp5521_write(client, LP5521_REG_CONFIG, cfg);
-
- /* Initialize all channels PWM to zero -> leds off */
- ret |= lp5521_write(client, LP5521_REG_R_PWM, 0);
- ret |= lp5521_write(client, LP5521_REG_G_PWM, 0);
- ret |= lp5521_write(client, LP5521_REG_B_PWM, 0);
-
- /* Set engines are set to run state when OP_MODE enables engines */
- ret |= lp5521_write(client, LP5521_REG_ENABLE,
- LP5521_ENABLE_RUN_PROGRAM);
- /* enable takes 500us. 1 - 2 ms leaves some margin */
- usleep_range(1000, 2000);
-
- return ret;
-}
-
-static int lp5521_run_selftest(struct lp5521_chip *chip, char *buf)
-{
- int ret;
- u8 status;
-
- ret = lp5521_read(chip->client, LP5521_REG_STATUS, &status);
- if (ret < 0)
- return ret;
-
- /* Check that ext clock is really in use if requested */
- if (chip->pdata && chip->pdata->clock_mode == LP5521_CLOCK_EXT)
- if ((status & LP5521_EXT_CLK_USED) == 0)
- return -EIO;
- return 0;
-}
-
-static void lp5521_set_brightness(struct led_classdev *cdev,
- enum led_brightness brightness)
-{
- struct lp5521_led *led = cdev_to_led(cdev);
- led->brightness = (u8)brightness;
- schedule_work(&led->brightness_work);
-}
-
-static void lp5521_led_brightness_work(struct work_struct *work)
-{
- struct lp5521_led *led = container_of(work,
- struct lp5521_led,
- brightness_work);
- struct lp5521_chip *chip = led_to_lp5521(led);
- struct i2c_client *client = chip->client;
- mutex_lock(&chip->lock);
- lp5521_write(client, LP5521_REG_LED_PWM_BASE + led->chan_nr,
- led->brightness);
- mutex_unlock(&chip->lock);
-}
-
-/* Detect the chip by setting its ENABLE register and reading it back. */
-static int lp5521_detect(struct i2c_client *client)
-{
- int ret;
- u8 buf;
+ /*
+ * To run the engine,
+ * operation mode and enable register should updated at the same time
+ */
- ret = lp5521_write(client, LP5521_REG_ENABLE, LP5521_ENABLE_DEFAULT);
+ ret = lp55xx_read(chip, LP5521_REG_OP_MODE, &mode);
if (ret)
- return ret;
- /* enable takes 500us. 1 - 2 ms leaves some margin */
- usleep_range(1000, 2000);
- ret = lp5521_read(client, LP5521_REG_ENABLE, &buf);
- if (ret)
- return ret;
- if (buf != LP5521_ENABLE_DEFAULT)
- return -ENODEV;
+ return;
- return 0;
-}
+ ret = lp55xx_read(chip, LP5521_REG_ENABLE, &exec);
+ if (ret)
+ return;
-/* Set engine mode and create appropriate sysfs attributes, if required. */
-static int lp5521_set_mode(struct lp5521_engine *engine, u8 mode)
-{
- int ret = 0;
+ /* change operation mode to RUN only when each engine is loading */
+ if (LP5521_R_IS_LOADING(mode)) {
+ mode = (mode & ~LP5521_MODE_R_M) | LP5521_RUN_R;
+ exec = (exec & ~LP5521_EXEC_R_M) | LP5521_RUN_R;
+ }
- /* if in that mode already do nothing, except for run */
- if (mode == engine->mode && mode != LP5521_CMD_RUN)
- return 0;
+ if (LP5521_G_IS_LOADING(mode)) {
+ mode = (mode & ~LP5521_MODE_G_M) | LP5521_RUN_G;
+ exec = (exec & ~LP5521_EXEC_G_M) | LP5521_RUN_G;
+ }
- if (mode == LP5521_CMD_RUN) {
- ret = lp5521_set_engine_mode(engine, LP5521_CMD_RUN);
- } else if (mode == LP5521_CMD_LOAD) {
- lp5521_set_engine_mode(engine, LP5521_CMD_DISABLED);
- lp5521_set_engine_mode(engine, LP5521_CMD_LOAD);
- } else if (mode == LP5521_CMD_DISABLED) {
- lp5521_set_engine_mode(engine, LP5521_CMD_DISABLED);
+ if (LP5521_B_IS_LOADING(mode)) {
+ mode = (mode & ~LP5521_MODE_B_M) | LP5521_RUN_B;
+ exec = (exec & ~LP5521_EXEC_B_M) | LP5521_RUN_B;
}
- engine->mode = mode;
+ lp55xx_write(chip, LP5521_REG_OP_MODE, mode);
+ lp5521_wait_opmode_done();
- return ret;
+ lp55xx_update_bits(chip, LP5521_REG_ENABLE, LP5521_EXEC_M, exec);
+ lp5521_wait_enable_done();
}
-static int lp5521_do_store_load(struct lp5521_engine *engine,
- const char *buf, size_t len)
+static int lp5521_update_program_memory(struct lp55xx_chip *chip,
+ const u8 *data, size_t size)
{
- struct lp5521_chip *chip = engine_to_lp5521(engine);
- struct i2c_client *client = chip->client;
- int ret, nrchars, offset = 0, i = 0;
- char c[3];
- unsigned cmd;
+ enum lp55xx_engine_index idx = chip->engine_idx;
u8 pattern[LP5521_PROGRAM_LENGTH] = {0};
+ u8 addr[] = {
+ [LP55XX_ENGINE_1] = LP5521_REG_R_PROG_MEM,
+ [LP55XX_ENGINE_2] = LP5521_REG_G_PROG_MEM,
+ [LP55XX_ENGINE_3] = LP5521_REG_B_PROG_MEM,
+ };
+ unsigned cmd;
+ char c[3];
+ int program_size;
+ int nrchars;
+ int offset = 0;
+ int ret;
+ int i;
- while ((offset < len - 1) && (i < LP5521_PROGRAM_LENGTH)) {
+ /* clear program memory before updating */
+ for (i = 0; i < LP5521_PROGRAM_LENGTH; i++)
+ lp55xx_write(chip, addr[idx] + i, 0);
+
+ i = 0;
+ while ((offset < size - 1) && (i < LP5521_PROGRAM_LENGTH)) {
/* separate sscanfs because length is working only for %s */
- ret = sscanf(buf + offset, "%2s%n ", c, &nrchars);
- if (ret != 2)
- goto fail;
+ ret = sscanf(data + offset, "%2s%n ", c, &nrchars);
+ if (ret != 1)
+ goto err;
+
ret = sscanf(c, "%2x", &cmd);
if (ret != 1)
- goto fail;
- pattern[i] = (u8)cmd;
+ goto err;
+ pattern[i] = (u8)cmd;
offset += nrchars;
i++;
}
/* Each instruction is 16bit long. Check that length is even */
if (i % 2)
- goto fail;
+ goto err;
- mutex_lock(&chip->lock);
- if (engine->mode == LP5521_CMD_LOAD)
- ret = lp5521_load_program(engine, pattern);
- else
- ret = -EINVAL;
- mutex_unlock(&chip->lock);
+ program_size = i;
+ for (i = 0; i < program_size; i++)
+ lp55xx_write(chip, addr[idx] + i, pattern[i]);
- if (ret) {
- dev_err(&client->dev, "failed loading pattern\n");
- return ret;
- }
+ return 0;
- return len;
-fail:
- dev_err(&client->dev, "wrong pattern format\n");
+err:
+ dev_err(&chip->cl->dev, "wrong pattern format\n");
return -EINVAL;
}
-static ssize_t store_engine_load(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t len, int nr)
+static void lp5521_firmware_loaded(struct lp55xx_chip *chip)
{
- struct i2c_client *client = to_i2c_client(dev);
- struct lp5521_chip *chip = i2c_get_clientdata(client);
- return lp5521_do_store_load(&chip->engines[nr - 1], buf, len);
-}
+ const struct firmware *fw = chip->fw;
-#define store_load(nr) \
-static ssize_t store_engine##nr##_load(struct device *dev, \
- struct device_attribute *attr, \
- const char *buf, size_t len) \
-{ \
- return store_engine_load(dev, attr, buf, len, nr); \
-}
-store_load(1)
-store_load(2)
-store_load(3)
-
-static ssize_t show_engine_mode(struct device *dev,
- struct device_attribute *attr,
- char *buf, int nr)
-{
- struct i2c_client *client = to_i2c_client(dev);
- struct lp5521_chip *chip = i2c_get_clientdata(client);
- switch (chip->engines[nr - 1].mode) {
- case LP5521_CMD_RUN:
- return sprintf(buf, "run\n");
- case LP5521_CMD_LOAD:
- return sprintf(buf, "load\n");
- case LP5521_CMD_DISABLED:
- return sprintf(buf, "disabled\n");
- default:
- return sprintf(buf, "disabled\n");
+ if (fw->size > LP5521_PROGRAM_LENGTH) {
+ dev_err(&chip->cl->dev, "firmware data size overflow: %zu\n",
+ fw->size);
+ return;
}
-}
-#define show_mode(nr) \
-static ssize_t show_engine##nr##_mode(struct device *dev, \
- struct device_attribute *attr, \
- char *buf) \
-{ \
- return show_engine_mode(dev, attr, buf, nr); \
+ /*
+ * Program momery sequence
+ * 1) set engine mode to "LOAD"
+ * 2) write firmware data into program memory
+ */
+
+ lp5521_load_engine(chip);
+ lp5521_update_program_memory(chip, fw->data, fw->size);
}
-show_mode(1)
-show_mode(2)
-show_mode(3)
-static ssize_t store_engine_mode(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t len, int nr)
+static int lp5521_post_init_device(struct lp55xx_chip *chip)
{
- struct i2c_client *client = to_i2c_client(dev);
- struct lp5521_chip *chip = i2c_get_clientdata(client);
- struct lp5521_engine *engine = &chip->engines[nr - 1];
- mutex_lock(&chip->lock);
+ int ret;
+ u8 val;
- if (!strncmp(buf, "run", 3))
- lp5521_set_mode(engine, LP5521_CMD_RUN);
- else if (!strncmp(buf, "load", 4))
- lp5521_set_mode(engine, LP5521_CMD_LOAD);
- else if (!strncmp(buf, "disabled", 8))
- lp5521_set_mode(engine, LP5521_CMD_DISABLED);
+ /*
+ * Make sure that the chip is reset by reading back the r channel
+ * current reg. This is dummy read is required on some platforms -
+ * otherwise further access to the R G B channels in the
+ * LP5521_REG_ENABLE register will not have any effect - strange!
+ */
+ ret = lp55xx_read(chip, LP5521_REG_R_CURRENT, &val);
+ if (ret) {
+ dev_err(&chip->cl->dev, "error in resetting chip\n");
+ return ret;
+ }
+ if (val != LP5521_REG_R_CURR_DEFAULT) {
+ dev_err(&chip->cl->dev,
+ "unexpected data in register (expected 0x%x got 0x%x)\n",
+ LP5521_REG_R_CURR_DEFAULT, val);
+ ret = -EINVAL;
+ return ret;
+ }
+ usleep_range(10000, 20000);
- mutex_unlock(&chip->lock);
- return len;
-}
+ /* Set all PWMs to direct control mode */
+ ret = lp55xx_write(chip, LP5521_REG_OP_MODE, LP5521_CMD_DIRECT);
-#define store_mode(nr) \
-static ssize_t store_engine##nr##_mode(struct device *dev, \
- struct device_attribute *attr, \
- const char *buf, size_t len) \
-{ \
- return store_engine_mode(dev, attr, buf, len, nr); \
-}
-store_mode(1)
-store_mode(2)
-store_mode(3)
+ val = chip->pdata->update_config ?
+ : (LP5521_PWRSAVE_EN | LP5521_CP_MODE_AUTO | LP5521_R_TO_BATT);
+ ret = lp55xx_write(chip, LP5521_REG_CONFIG, val);
+ if (ret)
+ return ret;
-static ssize_t show_max_current(struct device *dev,
- struct device_attribute *attr,
- char *buf)
-{
- struct led_classdev *led_cdev = dev_get_drvdata(dev);
- struct lp5521_led *led = cdev_to_led(led_cdev);
+ /* Initialize all channels PWM to zero -> leds off */
+ lp55xx_write(chip, LP5521_REG_R_PWM, 0);
+ lp55xx_write(chip, LP5521_REG_G_PWM, 0);
+ lp55xx_write(chip, LP5521_REG_B_PWM, 0);
- return sprintf(buf, "%d\n", led->max_current);
-}
+ /* Set engines are set to run state when OP_MODE enables engines */
+ ret = lp55xx_write(chip, LP5521_REG_ENABLE, LP5521_ENABLE_RUN_PROGRAM);
+ if (ret)
+ return ret;
-static ssize_t show_current(struct device *dev,
- struct device_attribute *attr,
- char *buf)
-{
- struct led_classdev *led_cdev = dev_get_drvdata(dev);
- struct lp5521_led *led = cdev_to_led(led_cdev);
+ lp5521_wait_enable_done();
- return sprintf(buf, "%d\n", led->led_current);
+ return 0;
}
-static ssize_t store_current(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t len)
+static int lp5521_run_selftest(struct lp55xx_chip *chip, char *buf)
{
- struct led_classdev *led_cdev = dev_get_drvdata(dev);
- struct lp5521_led *led = cdev_to_led(led_cdev);
- struct lp5521_chip *chip = led_to_lp5521(led);
- ssize_t ret;
- unsigned long curr;
+ struct lp55xx_platform_data *pdata = chip->pdata;
+ int ret;
+ u8 status;
- if (kstrtoul(buf, 0, &curr))
- return -EINVAL;
+ ret = lp55xx_read(chip, LP5521_REG_STATUS, &status);
+ if (ret < 0)
+ return ret;
- if (curr > led->max_current)
- return -EINVAL;
+ if (pdata->clock_mode != LP55XX_CLOCK_EXT)
+ return 0;
- mutex_lock(&chip->lock);
- ret = lp5521_set_led_current(chip, led->id, curr);
- mutex_unlock(&chip->lock);
+ /* Check that ext clock is really in use if requested */
+ if ((status & LP5521_EXT_CLK_USED) == 0)
+ return -EIO;
- if (ret < 0)
- return ret;
+ return 0;
+}
- led->led_current = (u8)curr;
+static void lp5521_led_brightness_work(struct work_struct *work)
+{
+ struct lp55xx_led *led = container_of(work, struct lp55xx_led,
+ brightness_work);
+ struct lp55xx_chip *chip = led->chip;
- return len;
+ mutex_lock(&chip->lock);
+ lp55xx_write(chip, LP5521_REG_LED_PWM_BASE + led->chan_nr,
+ led->brightness);
+ mutex_unlock(&chip->lock);
}
static ssize_t lp5521_selftest(struct device *dev,
struct device_attribute *attr,
char *buf)
{
- struct i2c_client *client = to_i2c_client(dev);
- struct lp5521_chip *chip = i2c_get_clientdata(client);
+ struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
+ struct lp55xx_chip *chip = led->chip;
int ret;
mutex_lock(&chip->lock);
@@ -534,133 +363,11 @@ static ssize_t lp5521_selftest(struct device *dev,
return sprintf(buf, "%s\n", ret ? "FAIL" : "OK");
}
-static void lp5521_clear_program_memory(struct i2c_client *cl)
-{
- int i;
- u8 rgb_mem[] = {
- LP5521_REG_R_PROG_MEM,
- LP5521_REG_G_PROG_MEM,
- LP5521_REG_B_PROG_MEM,
- };
-
- for (i = 0; i < ARRAY_SIZE(rgb_mem); i++) {
- lp5521_write(cl, rgb_mem[i], 0);
- lp5521_write(cl, rgb_mem[i] + 1, 0);
- }
-}
-
-static void lp5521_write_program_memory(struct i2c_client *cl,
- u8 base, u8 *rgb, int size)
-{
- int i;
-
- if (!rgb || size <= 0)
- return;
-
- for (i = 0; i < size; i++)
- lp5521_write(cl, base + i, *(rgb + i));
-
- lp5521_write(cl, base + i, 0);
- lp5521_write(cl, base + i + 1, 0);
-}
-
-static inline struct lp5521_led_pattern *lp5521_get_pattern
- (struct lp5521_chip *chip, u8 offset)
-{
- struct lp5521_led_pattern *ptn;
- ptn = chip->pdata->patterns + (offset - 1);
- return ptn;
-}
-
-static void lp5521_run_led_pattern(int mode, struct lp5521_chip *chip)
-{
- struct lp5521_led_pattern *ptn;
- struct i2c_client *cl = chip->client;
- int num_patterns = chip->pdata->num_patterns;
-
- if (mode > num_patterns || !(chip->pdata->patterns))
- return;
-
- if (mode == PATTERN_OFF) {
- lp5521_write(cl, LP5521_REG_ENABLE, LP5521_ENABLE_DEFAULT);
- usleep_range(1000, 2000);
- lp5521_write(cl, LP5521_REG_OP_MODE, LP5521_CMD_DIRECT);
- } else {
- ptn = lp5521_get_pattern(chip, mode);
- if (!ptn)
- return;
-
- lp5521_write(cl, LP5521_REG_OP_MODE, LP5521_CMD_LOAD);
- usleep_range(1000, 2000);
-
- lp5521_clear_program_memory(cl);
-
- lp5521_write_program_memory(cl, LP5521_REG_R_PROG_MEM,
- ptn->r, ptn->size_r);
- lp5521_write_program_memory(cl, LP5521_REG_G_PROG_MEM,
- ptn->g, ptn->size_g);
- lp5521_write_program_memory(cl, LP5521_REG_B_PROG_MEM,
- ptn->b, ptn->size_b);
-
- lp5521_write(cl, LP5521_REG_OP_MODE, LP5521_CMD_RUN);
- usleep_range(1000, 2000);
- lp5521_write(cl, LP5521_REG_ENABLE, LP5521_ENABLE_RUN_PROGRAM);
- }
-}
-
-static ssize_t store_led_pattern(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t len)
-{
- struct lp5521_chip *chip = i2c_get_clientdata(to_i2c_client(dev));
- unsigned long val;
- int ret;
-
- ret = kstrtoul(buf, 16, &val);
- if (ret)
- return ret;
-
- lp5521_run_led_pattern(val, chip);
-
- return len;
-}
-
-/* led class device attributes */
-static DEVICE_ATTR(led_current, S_IRUGO | S_IWUSR, show_current, store_current);
-static DEVICE_ATTR(max_current, S_IRUGO , show_max_current, NULL);
-
-static struct attribute *lp5521_led_attributes[] = {
- &dev_attr_led_current.attr,
- &dev_attr_max_current.attr,
- NULL,
-};
-
-static struct attribute_group lp5521_led_attribute_group = {
- .attrs = lp5521_led_attributes
-};
-
/* device attributes */
-static DEVICE_ATTR(engine1_mode, S_IRUGO | S_IWUSR,
- show_engine1_mode, store_engine1_mode);
-static DEVICE_ATTR(engine2_mode, S_IRUGO | S_IWUSR,
- show_engine2_mode, store_engine2_mode);
-static DEVICE_ATTR(engine3_mode, S_IRUGO | S_IWUSR,
- show_engine3_mode, store_engine3_mode);
-static DEVICE_ATTR(engine1_load, S_IWUSR, NULL, store_engine1_load);
-static DEVICE_ATTR(engine2_load, S_IWUSR, NULL, store_engine2_load);
-static DEVICE_ATTR(engine3_load, S_IWUSR, NULL, store_engine3_load);
static DEVICE_ATTR(selftest, S_IRUGO, lp5521_selftest, NULL);
-static DEVICE_ATTR(led_pattern, S_IWUSR, NULL, store_led_pattern);
static struct attribute *lp5521_attributes[] = {
- &dev_attr_engine1_mode.attr,
- &dev_attr_engine2_mode.attr,
- &dev_attr_engine3_mode.attr,
&dev_attr_selftest.attr,
- &dev_attr_engine1_load.attr,
- &dev_attr_engine2_load.attr,
- &dev_attr_engine3_load.attr,
- &dev_attr_led_pattern.attr,
NULL
};
@@ -668,217 +375,91 @@ static const struct attribute_group lp5521_group = {
.attrs = lp5521_attributes,
};
-static int lp5521_register_sysfs(struct i2c_client *client)
-{
- struct device *dev = &client->dev;
- return sysfs_create_group(&dev->kobj, &lp5521_group);
-}
-
-static void lp5521_unregister_sysfs(struct i2c_client *client)
-{
- struct lp5521_chip *chip = i2c_get_clientdata(client);
- struct device *dev = &client->dev;
- int i;
-
- sysfs_remove_group(&dev->kobj, &lp5521_group);
-
- for (i = 0; i < chip->num_leds; i++)
- sysfs_remove_group(&chip->leds[i].cdev.dev->kobj,
- &lp5521_led_attribute_group);
-}
-
-static int lp5521_init_led(struct lp5521_led *led,
- struct i2c_client *client,
- int chan, struct lp5521_platform_data *pdata)
-{
- struct device *dev = &client->dev;
- char name[32];
- int res;
-
- if (chan >= LP5521_MAX_LEDS)
- return -EINVAL;
-
- if (pdata->led_config[chan].led_current == 0)
- return 0;
-
- led->led_current = pdata->led_config[chan].led_current;
- led->max_current = pdata->led_config[chan].max_current;
- led->chan_nr = pdata->led_config[chan].chan_nr;
-
- if (led->chan_nr >= LP5521_MAX_LEDS) {
- dev_err(dev, "Use channel numbers between 0 and %d\n",
- LP5521_MAX_LEDS - 1);
- return -EINVAL;
- }
-
- led->cdev.brightness_set = lp5521_set_brightness;
- if (pdata->led_config[chan].name) {
- led->cdev.name = pdata->led_config[chan].name;
- } else {
- snprintf(name, sizeof(name), "%s:channel%d",
- pdata->label ?: client->name, chan);
- led->cdev.name = name;
- }
-
- res = led_classdev_register(dev, &led->cdev);
- if (res < 0) {
- dev_err(dev, "couldn't register led on channel %d\n", chan);
- return res;
- }
-
- res = sysfs_create_group(&led->cdev.dev->kobj,
- &lp5521_led_attribute_group);
- if (res < 0) {
- dev_err(dev, "couldn't register current attribute\n");
- led_classdev_unregister(&led->cdev);
- return res;
- }
- return 0;
-}
+/* Chip specific configurations */
+static struct lp55xx_device_config lp5521_cfg = {
+ .reset = {
+ .addr = LP5521_REG_RESET,
+ .val = LP5521_RESET,
+ },
+ .enable = {
+ .addr = LP5521_REG_ENABLE,
+ .val = LP5521_ENABLE_DEFAULT,
+ },
+ .max_channel = LP5521_MAX_LEDS,
+ .post_init_device = lp5521_post_init_device,
+ .brightness_work_fn = lp5521_led_brightness_work,
+ .set_led_current = lp5521_set_led_current,
+ .firmware_cb = lp5521_firmware_loaded,
+ .run_engine = lp5521_run_engine,
+ .dev_attr_group = &lp5521_group,
+};
static int lp5521_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
- struct lp5521_chip *chip;
- struct lp5521_platform_data *pdata;
- int ret, i, led;
- u8 buf;
-
- chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL);
- if (!chip)
- return -ENOMEM;
-
- i2c_set_clientdata(client, chip);
- chip->client = client;
-
- pdata = client->dev.platform_data;
+ int ret;
+ struct lp55xx_chip *chip;
+ struct lp55xx_led *led;
+ struct lp55xx_platform_data *pdata = client->dev.platform_data;
if (!pdata) {
dev_err(&client->dev, "no platform data\n");
return -EINVAL;
}
- mutex_init(&chip->lock);
-
- chip->pdata = pdata;
-
- if (pdata->setup_resources) {
- ret = pdata->setup_resources();
- if (ret < 0)
- return ret;
- }
+ chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL);
+ if (!chip)
+ return -ENOMEM;
- if (pdata->enable) {
- pdata->enable(0);
- usleep_range(1000, 2000); /* Keep enable down at least 1ms */
- pdata->enable(1);
- usleep_range(1000, 2000); /* 500us abs min. */
- }
+ led = devm_kzalloc(&client->dev,
+ sizeof(*led) * pdata->num_channels, GFP_KERNEL);
+ if (!led)
+ return -ENOMEM;
- lp5521_write(client, LP5521_REG_RESET, 0xff);
- usleep_range(10000, 20000); /*
- * Exact value is not available. 10 - 20ms
- * appears to be enough for reset.
- */
+ chip->cl = client;
+ chip->pdata = pdata;
+ chip->cfg = &lp5521_cfg;
- /*
- * Make sure that the chip is reset by reading back the r channel
- * current reg. This is dummy read is required on some platforms -
- * otherwise further access to the R G B channels in the
- * LP5521_REG_ENABLE register will not have any effect - strange!
- */
- ret = lp5521_read(client, LP5521_REG_R_CURRENT, &buf);
- if (ret) {
- dev_err(&client->dev, "error in resetting chip\n");
- goto fail2;
- }
- if (buf != LP5521_REG_R_CURR_DEFAULT) {
- dev_err(&client->dev,
- "unexpected data in register (expected 0x%x got 0x%x)\n",
- LP5521_REG_R_CURR_DEFAULT, buf);
- ret = -EINVAL;
- goto fail2;
- }
- usleep_range(10000, 20000);
+ mutex_init(&chip->lock);
- ret = lp5521_detect(client);
+ i2c_set_clientdata(client, led);
- if (ret) {
- dev_err(&client->dev, "Chip not found\n");
- goto fail2;
- }
+ ret = lp55xx_init_device(chip);
+ if (ret)
+ goto err_init;
dev_info(&client->dev, "%s programmable led chip found\n", id->name);
- ret = lp5521_configure(client);
- if (ret < 0) {
- dev_err(&client->dev, "error configuring chip\n");
- goto fail1;
- }
-
- /* Initialize leds */
- chip->num_channels = pdata->num_channels;
- chip->num_leds = 0;
- led = 0;
- for (i = 0; i < pdata->num_channels; i++) {
- /* Do not initialize channels that are not connected */
- if (pdata->led_config[i].led_current == 0)
- continue;
-
- ret = lp5521_init_led(&chip->leds[led], client, i, pdata);
- if (ret) {
- dev_err(&client->dev, "error initializing leds\n");
- goto fail2;
- }
- chip->num_leds++;
-
- chip->leds[led].id = led;
- /* Set initial LED current */
- lp5521_set_led_current(chip, led,
- chip->leds[led].led_current);
-
- INIT_WORK(&(chip->leds[led].brightness_work),
- lp5521_led_brightness_work);
-
- led++;
- }
+ ret = lp55xx_register_leds(led, chip);
+ if (ret)
+ goto err_register_leds;
- ret = lp5521_register_sysfs(client);
+ ret = lp55xx_register_sysfs(chip);
if (ret) {
dev_err(&client->dev, "registering sysfs failed\n");
- goto fail2;
- }
- return ret;
-fail2:
- for (i = 0; i < chip->num_leds; i++) {
- led_classdev_unregister(&chip->leds[i].cdev);
- cancel_work_sync(&chip->leds[i].brightness_work);
+ goto err_register_sysfs;
}
-fail1:
- if (pdata->enable)
- pdata->enable(0);
- if (pdata->release_resources)
- pdata->release_resources();
+
+ return 0;
+
+err_register_sysfs:
+ lp55xx_unregister_leds(led, chip);
+err_register_leds:
+ lp55xx_deinit_device(chip);
+err_init:
return ret;
}
static int lp5521_remove(struct i2c_client *client)
{
- struct lp5521_chip *chip = i2c_get_clientdata(client);
- int i;
+ struct lp55xx_led *led = i2c_get_clientdata(client);
+ struct lp55xx_chip *chip = led->chip;
- lp5521_run_led_pattern(PATTERN_OFF, chip);
- lp5521_unregister_sysfs(client);
-
- for (i = 0; i < chip->num_leds; i++) {
- led_classdev_unregister(&chip->leds[i].cdev);
- cancel_work_sync(&chip->leds[i].brightness_work);
- }
+ lp5521_stop_engine(chip);
+ lp55xx_unregister_sysfs(chip);
+ lp55xx_unregister_leds(led, chip);
+ lp55xx_deinit_device(chip);
- if (chip->pdata->enable)
- chip->pdata->enable(0);
- if (chip->pdata->release_resources)
- chip->pdata->release_resources();
return 0;
}
@@ -900,5 +481,6 @@ static struct i2c_driver lp5521_driver = {
module_i2c_driver(lp5521_driver);
MODULE_AUTHOR("Mathias Nyman, Yuri Zaporozhets, Samu Onkalo");
+MODULE_AUTHOR("Milo Kim <milo.kim@ti.com>");
MODULE_DESCRIPTION("LP5521 LED engine");
MODULE_LICENSE("GPL v2");
View
1,050 drivers/leds/leds-lp5523.c
@@ -2,8 +2,10 @@
* lp5523.c - LP5523 LED Driver
*
* Copyright (C) 2010 Nokia Corporation
+ * Copyright (C) 2012 Texas Instruments
*
* Contact: Samu Onkalo <samu.p.onkalo@nokia.com>
+ * Milo(Woogyom) Kim <milo.kim@ti.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
@@ -20,502 +22,351 @@
* 02110-1301 USA
*/
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/i2c.h>
-#include <linux/mutex.h>
-#include <linux/gpio.h>
-#include <linux/interrupt.h>
#include <linux/delay.h>
-#include <linux/ctype.h>
-#include <linux/spinlock.h>
-#include <linux/wait.h>
+#include <linux/firmware.h>
+#include <linux/i2c.h>
+#include <linux/init.h>
#include <linux/leds.h>
-#include <linux/leds-lp5523.h>
-#include <linux/workqueue.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/platform_data/leds-lp55xx.h>
#include <linux/slab.h>
+#include "leds-lp55xx-common.h"
+
+#define LP5523_PROGRAM_LENGTH 32
+#define LP5523_MAX_LEDS 9
+
+/* Registers */
#define LP5523_REG_ENABLE 0x00
#define LP5523_REG_OP_MODE 0x01
-#define LP5523_REG_RATIOMETRIC_MSB 0x02
-#define LP5523_REG_RATIOMETRIC_LSB 0x03
#define LP5523_REG_ENABLE_LEDS_MSB 0x04
#define LP5523_REG_ENABLE_LEDS_LSB 0x05
-#define LP5523_REG_LED_CNTRL_BASE 0x06
#define LP5523_REG_LED_PWM_BASE 0x16
#define LP5523_REG_LED_CURRENT_BASE 0x26
#define LP5523_REG_CONFIG 0x36
-#define LP5523_REG_CHANNEL1_PC 0x37
-#define LP5523_REG_CHANNEL2_PC 0x38
-#define LP5523_REG_CHANNEL3_PC 0x39
-#define LP5523_REG_STATUS 0x3a
-#define LP5523_REG_GPO 0x3b
-#define LP5523_REG_VARIABLE 0x3c
-#define LP5523_REG_RESET 0x3d
-#define LP5523_REG_TEMP_CTRL 0x3e
-#define LP5523_REG_TEMP_READ 0x3f
-#define LP5523_REG_TEMP_WRITE 0x40
+#define LP5523_REG_STATUS 0x3A
+#define LP5523_REG_RESET 0x3D
#define LP5523_REG_LED_TEST_CTRL 0x41
#define LP5523_REG_LED_TEST_ADC 0x42
-#define LP5523_REG_ENG1_VARIABLE 0x45
-#define LP5523_REG_ENG2_VARIABLE 0x46
-#define LP5523_REG_ENG3_VARIABLE 0x47
-#define LP5523_REG_MASTER_FADER1 0x48
-#define LP5523_REG_MASTER_FADER2 0x49
-#define LP5523_REG_MASTER_FADER3 0x4a
-#define LP5523_REG_CH1_PROG_START 0x4c
-#define LP5523_REG_CH2_PROG_START 0x4d
-#define LP5523_REG_CH3_PROG_START 0x4e
-#define LP5523_REG_PROG_PAGE_SEL 0x4f
+#define LP5523_REG_PROG_PAGE_SEL 0x4F
#define LP5523_REG_PROG_MEM 0x50
-#define LP5523_CMD_LOAD 0x15 /* 00010101 */
-#define LP5523_CMD_RUN 0x2a /* 00101010 */
-#define LP5523_CMD_DISABLED 0x00 /* 00000000 */
-
+/* Bit description in registers */
#define LP5523_ENABLE 0x40
#define LP5523_AUTO_INC 0x40
#define LP5523_PWR_SAVE 0x20
#define LP5523_PWM_PWR_SAVE 0x04
-#define LP5523_CP_1 0x08
-#define LP5523_CP_1_5 0x10
#define LP5523_CP_AUTO 0x18
-#define LP5523_INT_CLK 0x01
#define LP5523_AUTO_CLK 0x02
+
#define LP5523_EN_LEDTEST 0x80
#define LP5523_LEDTEST_DONE 0x80
-
-#define LP5523_DEFAULT_CURRENT 50 /* microAmps */
-#define LP5523_PROGRAM_LENGTH 32 /* in bytes */
-#define LP5523_PROGRAM_PAGES 6
+#define LP5523_RESET 0xFF
#define LP5523_ADC_SHORTCIRC_LIM 80
-
-#define LP5523_LEDS 9
-#define LP5523_ENGINES 3
-
-#define LP5523_ENG_MASK_BASE 0x30 /* 00110000 */
-
-#define LP5523_ENG_STATUS_MASK 0x07 /* 00000111 */
-
-#define LP5523_IRQ_FLAGS IRQF_TRIGGER_FALLING
-
#define LP5523_EXT_CLK_USED 0x08
-#define LED_ACTIVE(mux, led) (!!(mux & (0x0001 << led)))
-#define SHIFT_MASK(id) (((id) - 1) * 2)
+/* Memory Page Selection */
+#define LP5523_PAGE_ENG1 0
+#define LP5523_PAGE_ENG2 1
+#define LP5523_PAGE_ENG3 2
+
+/* Program Memory Operations */
+#define LP5523_MODE_ENG1_M 0x30 /* Operation Mode Register */
+#define LP5523_MODE_ENG2_M 0x0C
+#define LP5523_MODE_ENG3_M 0x03
+#define LP5523_LOAD_ENG1 0x10
+#define LP5523_LOAD_ENG2 0x04
+#define LP5523_LOAD_ENG3 0x01
+
+#define LP5523_ENG1_IS_LOADING(mode) \
+ ((mode & LP5523_MODE_ENG1_M) == LP5523_LOAD_ENG1)
+#define LP5523_ENG2_IS_LOADING(mode) \
+ ((mode & LP5523_MODE_ENG2_M) == LP5523_LOAD_ENG2)
+#define LP5523_ENG3_IS_LOADING(mode) \
+ ((mode & LP5523_MODE_ENG3_M) == LP5523_LOAD_ENG3)
+
+#define LP5523_EXEC_ENG1_M 0x30 /* Enable Register */
+#define LP5523_EXEC_ENG2_M 0x0C
+#define LP5523_EXEC_ENG3_M 0x03
+#define LP5523_EXEC_M 0x3F
+#define LP5523_RUN_ENG1 0x20
+#define LP5523_RUN_ENG2 0x08
+#define LP5523_RUN_ENG3 0x02
enum lp5523_chip_id {
LP5523,
LP55231,
};
-struct lp5523_engine {
- int id;
- u8 mode;
- u8 prog_page;
- u8 mux_page;
- u16 led_mux;
- u8 engine_mask;
-};
-
-struct lp5523_led {
- int id;
- u8 chan_nr;
- u8 led_current;
- u8 max_current;
- struct led_classdev cdev;
- struct work_struct brightness_work;
- u8 brightness;
-};
-
-struct lp5523_chip {
- struct mutex lock; /* Serialize control */
- struct i2c_client *client;
- struct lp5523_engine engines[LP5523_ENGINES];
- struct lp5523_led leds[LP5523_LEDS];
- struct lp5523_platform_data *pdata;
- u8 num_channels;
- u8 num_leds;
-};
-
-static inline struct lp5523_led *cdev_to_led(struct led_classdev *cdev)
+static inline void lp5523_wait_opmode_done(void)
{
- return container_of(cdev, struct lp5523_led, cdev);
-}
-
-static inline struct lp5523_chip *engine_to_lp5523(struct lp5523_engine *engine)
-{
- return container_of(engine, struct lp5523_chip,
- engines[engine->id - 1]);
-}
-
-static inline struct lp5523_chip *led_to_lp5523(struct lp5523_led *led)
-{
- return container_of(led, struct lp5523_chip,
- leds[led->id]);
+ usleep_range(1000, 2000);
}
-static void lp5523_set_mode(struct lp5523_engine *engine, u8 mode);
-static int lp5523_set_engine_mode(struct lp5523_engine *engine, u8 mode);
-static int lp5523_load_program(struct lp5523_engine *engine, const u8 *pattern);
-
-static void lp5523_led_brightness_work(struct work_struct *work);
-
-static int lp5523_write(struct i2c_client *client, u8 reg, u8 value)
+static void lp5523_set_led_current(struct lp55xx_led *led, u8 led_current)
{
- return i2c_smbus_write_byte_data(client, reg, value);
+ led->led_current = led_current;
+ lp55xx_write(led->chip, LP5523_REG_LED_CURRENT_BASE + led->chan_nr,
+ led_current);
}
-static int lp5523_read(struct i2c_client *client, u8 reg, u8 *buf)
-{
- s32 ret = i2c_smbus_read_byte_data(client, reg);
-
- if (ret < 0)
- return ret;
-
- *buf = ret;
- return 0;
-}
-
-static int lp5523_detect(struct i2c_client *client)
+static int lp5523_post_init_device(struct lp55xx_chip *chip)
{
int ret;
- u8 buf;
- ret = lp5523_write(client, LP5523_REG_ENABLE, LP5523_ENABLE);
- if (ret)
- return ret;
- ret = lp5523_read(client, LP5523_REG_ENABLE, &buf);
+ ret = lp55xx_write(chip, LP5523_REG_ENABLE, LP5523_ENABLE);
if (ret)
return ret;
- if (buf == 0x40)
- return 0;
- else
- return -ENODEV;
-}
-static int lp5523_configure(struct i2c_client *client)
-{
- struct lp5523_chip *chip = i2c_get_clientdata(client);
- int ret = 0;
- u8 status;
-
- /* one pattern per engine setting led mux start and stop addresses */
- static const u8 pattern[][LP5523_PROGRAM_LENGTH] = {
- { 0x9c, 0x30, 0x9c, 0xb0, 0x9d, 0x80, 0xd8, 0x00, 0},
- { 0x9c, 0x40, 0x9c, 0xc0, 0x9d, 0x80, 0xd8, 0x00, 0},
- { 0x9c, 0x50, 0x9c, 0xd0, 0x9d, 0x80, 0xd8, 0x00, 0},
- };
-
- ret |= lp5523_write(client, LP5523_REG_ENABLE, LP5523_ENABLE);
/* Chip startup time is 500 us, 1 - 2 ms gives some margin */
usleep_range(1000, 2000);
- ret |= lp5523_write(client, LP5523_REG_CONFIG,
+ ret = lp55xx_write(chip, LP5523_REG_CONFIG,
LP5523_AUTO_INC | LP5523_PWR_SAVE |
LP5523_CP_AUTO | LP5523_AUTO_CLK |
LP5523_PWM_PWR_SAVE);
+ if (ret)
+ return ret;
/* turn on all leds */
- ret |= lp5523_write(client, LP5523_REG_ENABLE_LEDS_MSB, 0x01);
- ret |= lp5523_write(client, LP5523_REG_ENABLE_LEDS_LSB, 0xff);
-
- /* hardcode 32 bytes of memory for each engine from program memory */
- ret |= lp5523_write(client, LP5523_REG_CH1_PROG_START, 0x00);
- ret |= lp5523_write(client, LP5523_REG_CH2_PROG_START, 0x10);
- ret |= lp5523_write(client, LP5523_REG_CH3_PROG_START, 0x20);
-
- /* write led mux address space for each channel */
- ret |= lp5523_load_program(&chip->engines[0], pattern[0]);
- ret |= lp5523_load_program(&chip->engines[1], pattern[1]);
- ret |= lp5523_load_program(&chip->engines[2], pattern[2]);
-
- if (ret) {
- dev_err(&client->dev, "could not load mux programs\n");
- return -1;
- }
-
- /* set all engines exec state and mode to run 00101010 */
- ret |= lp5523_write(client, LP5523_REG_ENABLE,
- (LP5523_CMD_RUN | LP5523_ENABLE));
-
- ret |= lp5523_write(client, LP5523_REG_OP_MODE, LP5523_CMD_RUN);
-
- if (ret) {
- dev_err(&client->dev, "could not start mux programs\n");
- return -1;
- }
-
- /* Let the programs run for couple of ms and check the engine status */
- usleep_range(3000, 6000);
- ret = lp5523_read(client, LP5523_REG_STATUS, &status);
- if (ret < 0)
+ ret = lp55xx_write(chip, LP5523_REG_ENABLE_LEDS_MSB, 0x01);
+ if (ret)
return ret;
- status &= LP5523_ENG_STATUS_MASK;
-
- if (status == LP5523_ENG_STATUS_MASK) {
- dev_dbg(&client->dev, "all engines configured\n");
- } else {
- dev_info(&client->dev, "status == %x\n", status);
- dev_err(&client->dev, "cound not configure LED engine\n");
- return -1;
- }
-
- dev_info(&client->dev, "disabling engines\n");
-
- ret |= lp5523_write(client, LP5523_REG_OP_MODE, LP5523_CMD_DISABLED);
-
- return ret;
+ return lp55xx_write(chip, LP5523_REG_ENABLE_LEDS_LSB, 0xff);
}
-static int lp5523_set_engine_mode(struct lp5523_engine *engine, u8 mode)
+static void lp5523_load_engine(struct lp55xx_chip *chip)
{
- struct lp5523_chip *chip = engine_to_lp5523(engine);
- struct i2c_client *client = chip->client;
- int ret;
- u8 engine_state;
+ enum lp55xx_engine_index idx = chip->engine_idx;
+ u8 mask[] = {
+ [LP55XX_ENGINE_1] = LP5523_MODE_ENG1_M,
+ [LP55XX_ENGINE_2] = LP5523_MODE_ENG2_M,
+ [LP55XX_ENGINE_3] = LP5523_MODE_ENG3_M,
+ };
- ret = lp5523_read(client, LP5523_REG_OP_MODE, &engine_state);
- if (ret)
- goto fail;
+ u8 val[] = {
+ [LP55XX_ENGINE_1] = LP5523_LOAD_ENG1,
+ [LP55XX_ENGINE_2] = LP5523_LOAD_ENG2,
+ [LP55XX_ENGINE_3] = LP5523_LOAD_ENG3,
+ };
- engine_state &= ~(engine->engine_mask);
+ u8 page_sel[] = {
+ [LP55XX_ENGINE_1] = LP5523_PAGE_ENG1,
+ [LP55XX_ENGINE_2] = LP5523_PAGE_ENG2,
+ [LP55XX_ENGINE_3] = LP5523_PAGE_ENG3,
+ };
- /* set mode only for this engine */
- mode &= engine->engine_mask;
+ lp55xx_update_bits(chip, LP5523_REG_OP_MODE, mask[idx], val[idx]);
- engine_state |= mode;
+ lp5523_wait_opmode_done();
- ret |= lp5523_write(client, LP5523_REG_OP_MODE, engine_state);
-fail:
- return ret;
+ lp55xx_write(chip, LP5523_REG_PROG_PAGE_SEL, page_sel[idx]);
}
-static int lp5523_load_mux(struct lp5523_engine *engine, u16 mux)
+static void lp5523_stop_engine(struct lp55xx_chip *chip)
{
- struct lp5523_chip *chip = engine_to_lp5523(engine);
- struct i2c_client *client = chip->client;
- int ret = 0;
-
- ret |= lp5523_set_engine_mode(engine, LP5523_CMD_LOAD);
+ lp55xx_write(chip, LP5523_REG_OP_MODE, 0);
+ lp5523_wait_opmode_done();
+}
- ret |= lp5523_write(client, LP5523_REG_PROG_PAGE_SEL, engine->mux_page);
- ret |= lp5523_write(client, LP5523_REG_PROG_MEM,
- (u8)(mux >> 8));
- ret |= lp5523_write(client, LP5523_REG_PROG_MEM + 1, (u8)(mux));
- engine->led_mux = mux;
+static void lp5523_turn_off_channels(struct lp55xx_chip *chip)
+{
+ int i;
- return ret;
+ for (i = 0; i < LP5523_MAX_LEDS; i++)
+ lp55xx_write(chip, LP5523_REG_LED_PWM_BASE + i, 0);
}
-static int lp5523_load_program(struct lp5523_engine *engine, const u8 *pattern)
+static void lp5523_run_engine(struct lp55xx_chip *chip, bool start)
{
- struct lp5523_chip *chip = engine_to_lp5523(engine);
- struct i2c_client *client = chip->client;
+ int ret;
+ u8 mode;
+ u8 exec;
- int ret = 0;
+ /* stop engine */
+ if (!start) {
+ lp5523_stop_engine(chip);
+ lp5523_turn_off_channels(chip);
+ return;
+ }
- ret |= lp5523_set_engine_mode(engine, LP5523_CMD_LOAD);
+ /*
+ * To run the engine,
+ * operation mode and enable register should updated at the same time
+ */
- ret |= lp5523_write(client, LP5523_REG_PROG_PAGE_SEL,
- engine->prog_page);
- ret |= i2c_smbus_write_i2c_block_data(client, LP5523_REG_PROG_MEM,
- LP5523_PROGRAM_LENGTH, pattern);
+ ret = lp55xx_read(chip, LP5523_REG_OP_MODE, &mode);
+ if (ret)
+ return;
- return ret;
-}
+ ret = lp55xx_read(chip, LP5523_REG_ENABLE, &exec);
+ if (ret)
+ return;
-static int lp5523_run_program(struct lp5523_engine *engine)
-{
- struct lp5523_chip *chip = engine_to_lp5523(engine);
- struct i2c_client *client = chip->client;
- int ret;
+ /* change operation mode to RUN only when each engine is loading */
+ if (LP5523_ENG1_IS_LOADING(mode)) {
+ mode = (mode & ~LP5523_MODE_ENG1_M) | LP5523_RUN_ENG1;
+ exec = (exec & ~LP5523_EXEC_ENG1_M) | LP5523_RUN_ENG1;
+ }
- ret = lp5523_write(client, LP5523_REG_ENABLE,
- LP5523_CMD_RUN | LP5523_ENABLE);
- if (ret)
- goto fail;
+ if (LP5523_ENG2_IS_LOADING(mode)) {
+ mode = (mode & ~LP5523_MODE_ENG2_M) | LP5523_RUN_ENG2;
+ exec = (exec & ~LP5523_EXEC_ENG2_M) | LP5523_RUN_ENG2;
+ }
- ret = lp5523_set_engine_mode(engine, LP5523_CMD_RUN);
-fail:
- return ret;
+ if (LP5523_ENG3_IS_LOADING(mode)) {
+ mode = (mode & ~LP5523_MODE_ENG3_M) | LP5523_RUN_ENG3;
+ exec = (exec & ~LP5523_EXEC_ENG3_M) | LP5523_RUN_ENG3;
+ }
+
+ lp55xx_write(chip, LP5523_REG_OP_MODE, mode);
+ lp5523_wait_opmode_done();
+
+ lp55xx_update_bits(chip, LP5523_REG_ENABLE, LP5523_EXEC_M, exec);
}
-static int lp5523_mux_parse(const char *buf, u16 *mux, size_t len)
+static int lp5523_update_program_memory(struct lp55xx_chip *chip,
+ const u8 *data, size_t size)
{
+ u8 pattern[LP5523_PROGRAM_LENGTH] = {0};
+ unsigned cmd;
+ char c[3];
+ int update_size;
+ int nrchars;
+ int offset = 0;
+ int ret;
int i;
- u16 tmp_mux = 0;
-
- len = min_t(int, len, LP5523_LEDS);
- for (i = 0; i < len; i++) {
- switch (buf[i]) {
- case '1':
- tmp_mux |= (1 << i);
- break;
- case '0':
- break;
- case '\n':
- i = len;
- break;
- default:
- return -1;
- }
- }
- *mux = tmp_mux;
- return 0;
-}
+ /* clear program memory before updating */
+ for (i = 0; i < LP5523_PROGRAM_LENGTH; i++)
+ lp55xx_write(chip, LP5523_REG_PROG_MEM + i, 0);
-static void lp5523_mux_to_array(u16 led_mux, char *array)
-{
- int i, pos = 0;
- for (i = 0; i < LP5523_LEDS; i++)
- pos += sprintf(array + pos, "%x", LED_ACTIVE(led_mux, i));
+ i = 0;
+ while ((offset < size - 1) && (i < LP5523_PROGRAM_LENGTH)) {
+ /* separate sscanfs because length is working only for %s */
+ ret = sscanf(data + offset, "%2s%n ", c, &nrchars);
+ if (ret != 1)
+ goto err;
- array[pos] = '\0';
-}
+ ret = sscanf(c, "%2x", &cmd);
+ if (ret != 1)
+ goto err;
-/*--------------------------------------------------------------*/
-/* Sysfs interface */
-/*--------------------------------------------------------------*/
+ pattern[i] = (u8)cmd;
+ offset += nrchars;
+ i++;
+ }
-static ssize_t show_engine_leds(struct device *dev,
- struct device_attribute *attr,
- char *buf, int nr)
-{
- struct i2c_client *client = to_i2c_client(dev);
- struct lp5523_chip *chip = i2c_get_clientdata(client);
- char mux[LP5523_LEDS + 1];
+ /* Each instruction is 16bit long. Check that length is even */
+ if (i % 2)
+ goto err;
- lp5523_mux_to_array(chip->engines[nr - 1].led_mux, mux);
+ update_size = i;
+ for (i = 0; i < update_size; i++)
+ lp55xx_write(chip, LP5523_REG_PROG_MEM + i, pattern[i]);
- return sprintf(buf, "%s\n", mux);
-}
+ return 0;
-#define show_leds(nr) \
-static ssize_t show_engine##nr##_leds(struct device *dev, \
- struct device_attribute *attr, \
- char *buf) \
-{ \
- return show_engine_leds(dev, attr, buf, nr); \
+err:
+ dev_err(&chip->cl->dev, "wrong pattern format\n");
+ return -EINVAL;
}
-show_leds(1)
-show_leds(2)
-show_leds(3)
-static ssize_t store_engine_leds(struct device *dev,
- struct device_attribute *attr,
- const char *buf, size_t len, int nr)
+static void lp5523_firmware_loaded(struct lp55xx_chip *chip)
{
- struct i2c_client *client = to_i2c_client(dev);
- struct lp5523_chip *chip = i2c_get_clientdata(client);
- u16 mux = 0;
- ssize_t ret;
+ const struct firmware *fw = chip->fw;
- if (lp5523_mux_parse(buf, &mux, len))
- return -EINVAL;
-
- mutex_lock(&chip->lock);
- ret = -EINVAL;
- if (chip->engines[nr - 1].mode != LP5523_CMD_LOAD)
- goto leave;
+ if (fw->size > LP5523_PROGRAM_LENGTH) {
+ dev_err(&chip->cl->dev, "firmware data size overflow: %zu\n",
+ fw->size);
+ return;
+ }
- if (lp5523_load_mux(&chip->engines[nr - 1], mux))
- goto leave;
+ /*
+ * Program momery sequence
+ * 1) set engine mode to "LOAD"
+ * 2) write firmware data into program memory
+ */
- ret = len;
-leave:
- mutex_unlock(&chip->lock);
- return ret;
+ lp5523_load_engine(chip);
+ lp5523_update_program_memory(chip, fw->data, fw->size);
}
-#define store_leds(nr) \
-static ssize_t store_engine##nr##_leds(struct device *dev, \
- struct device_attribute *attr, \
- const char *buf, size_t len) \
-{ \
- return store_engine_leds(dev, attr, buf, len, nr); \