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platform/x86: add meraki-mx100 platform driver
This adds platform support for the Cisco Meraki MX100 (Tinkerbell) network appliance. This sets up the network LEDs and Reset button. Depends-on: ef0eea5 ("mfd: lpc_ich: Enable GPIO driver for DH89xxCC") Co-developed-by: Christian Lamparter <chunkeey@gmail.com> Signed-off-by: Christian Lamparter <chunkeey@gmail.com> Signed-off-by: Chris Blake <chrisrblake93@gmail.com> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
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// SPDX-License-Identifier: GPL-2.0+ | ||
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/* | ||
* Cisco Meraki MX100 (Tinkerbell) board platform driver | ||
* | ||
* Based off of arch/x86/platform/meraki/tink.c from the | ||
* Meraki GPL release meraki-firmware-sources-r23-20150601 | ||
* | ||
* Format inspired by platform/x86/pcengines-apuv2.c | ||
* | ||
* Copyright (C) 2021 Chris Blake <chrisrblake93@gmail.com> | ||
*/ | ||
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt | ||
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#include <linux/dmi.h> | ||
#include <linux/err.h> | ||
#include <linux/gpio_keys.h> | ||
#include <linux/gpio/machine.h> | ||
#include <linux/input.h> | ||
#include <linux/io.h> | ||
#include <linux/kernel.h> | ||
#include <linux/leds.h> | ||
#include <linux/module.h> | ||
#include <linux/platform_device.h> | ||
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#define TINK_GPIO_DRIVER_NAME "gpio_ich" | ||
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/* LEDs */ | ||
static const struct gpio_led tink_leds[] = { | ||
{ | ||
.name = "mx100:green:internet", | ||
.default_trigger = "default-on", | ||
}, | ||
{ | ||
.name = "mx100:green:lan2", | ||
}, | ||
{ | ||
.name = "mx100:green:lan3", | ||
}, | ||
{ | ||
.name = "mx100:green:lan4", | ||
}, | ||
{ | ||
.name = "mx100:green:lan5", | ||
}, | ||
{ | ||
.name = "mx100:green:lan6", | ||
}, | ||
{ | ||
.name = "mx100:green:lan7", | ||
}, | ||
{ | ||
.name = "mx100:green:lan8", | ||
}, | ||
{ | ||
.name = "mx100:green:lan9", | ||
}, | ||
{ | ||
.name = "mx100:green:lan10", | ||
}, | ||
{ | ||
.name = "mx100:green:lan11", | ||
}, | ||
{ | ||
.name = "mx100:green:ha", | ||
}, | ||
{ | ||
.name = "mx100:orange:ha", | ||
}, | ||
{ | ||
.name = "mx100:green:usb", | ||
}, | ||
{ | ||
.name = "mx100:orange:usb", | ||
}, | ||
}; | ||
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static const struct gpio_led_platform_data tink_leds_pdata = { | ||
.num_leds = ARRAY_SIZE(tink_leds), | ||
.leds = tink_leds, | ||
}; | ||
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static struct gpiod_lookup_table tink_leds_table = { | ||
.dev_id = "leds-gpio", | ||
.table = { | ||
GPIO_LOOKUP_IDX(TINK_GPIO_DRIVER_NAME, 11, | ||
NULL, 0, GPIO_ACTIVE_LOW), | ||
GPIO_LOOKUP_IDX(TINK_GPIO_DRIVER_NAME, 18, | ||
NULL, 1, GPIO_ACTIVE_HIGH), | ||
GPIO_LOOKUP_IDX(TINK_GPIO_DRIVER_NAME, 20, | ||
NULL, 2, GPIO_ACTIVE_HIGH), | ||
GPIO_LOOKUP_IDX(TINK_GPIO_DRIVER_NAME, 22, | ||
NULL, 3, GPIO_ACTIVE_HIGH), | ||
GPIO_LOOKUP_IDX(TINK_GPIO_DRIVER_NAME, 23, | ||
NULL, 4, GPIO_ACTIVE_HIGH), | ||
GPIO_LOOKUP_IDX(TINK_GPIO_DRIVER_NAME, 32, | ||
NULL, 5, GPIO_ACTIVE_HIGH), | ||
GPIO_LOOKUP_IDX(TINK_GPIO_DRIVER_NAME, 34, | ||
NULL, 6, GPIO_ACTIVE_HIGH), | ||
GPIO_LOOKUP_IDX(TINK_GPIO_DRIVER_NAME, 35, | ||
NULL, 7, GPIO_ACTIVE_HIGH), | ||
GPIO_LOOKUP_IDX(TINK_GPIO_DRIVER_NAME, 36, | ||
NULL, 8, GPIO_ACTIVE_HIGH), | ||
GPIO_LOOKUP_IDX(TINK_GPIO_DRIVER_NAME, 37, | ||
NULL, 9, GPIO_ACTIVE_HIGH), | ||
GPIO_LOOKUP_IDX(TINK_GPIO_DRIVER_NAME, 48, | ||
NULL, 10, GPIO_ACTIVE_HIGH), | ||
GPIO_LOOKUP_IDX(TINK_GPIO_DRIVER_NAME, 16, | ||
NULL, 11, GPIO_ACTIVE_LOW), | ||
GPIO_LOOKUP_IDX(TINK_GPIO_DRIVER_NAME, 7, | ||
NULL, 12, GPIO_ACTIVE_LOW), | ||
GPIO_LOOKUP_IDX(TINK_GPIO_DRIVER_NAME, 21, | ||
NULL, 13, GPIO_ACTIVE_LOW), | ||
GPIO_LOOKUP_IDX(TINK_GPIO_DRIVER_NAME, 19, | ||
NULL, 14, GPIO_ACTIVE_LOW), | ||
{} /* Terminating entry */ | ||
} | ||
}; | ||
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/* Reset Button */ | ||
static struct gpio_keys_button tink_buttons[] = { | ||
{ | ||
.desc = "Reset", | ||
.type = EV_KEY, | ||
.code = KEY_RESTART, | ||
.active_low = 1, | ||
.debounce_interval = 100, | ||
}, | ||
}; | ||
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static const struct gpio_keys_platform_data tink_buttons_pdata = { | ||
.buttons = tink_buttons, | ||
.nbuttons = ARRAY_SIZE(tink_buttons), | ||
.poll_interval = 20, | ||
.rep = 0, | ||
.name = "mx100-keys", | ||
}; | ||
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static struct gpiod_lookup_table tink_keys_table = { | ||
.dev_id = "gpio-keys-polled", | ||
.table = { | ||
GPIO_LOOKUP_IDX(TINK_GPIO_DRIVER_NAME, 60, | ||
NULL, 0, GPIO_ACTIVE_LOW), | ||
{} /* Terminating entry */ | ||
} | ||
}; | ||
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/* Board setup */ | ||
static const struct dmi_system_id tink_systems[] __initconst = { | ||
{ | ||
.matches = { | ||
DMI_EXACT_MATCH(DMI_SYS_VENDOR, "Cisco"), | ||
DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "MX100-HW"), | ||
}, | ||
}, | ||
{} /* Terminating entry */ | ||
}; | ||
MODULE_DEVICE_TABLE(dmi, tink_systems); | ||
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static struct platform_device *tink_leds_pdev; | ||
static struct platform_device *tink_keys_pdev; | ||
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static struct platform_device * __init tink_create_dev( | ||
const char *name, const void *pdata, size_t sz) | ||
{ | ||
struct platform_device *pdev; | ||
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pdev = platform_device_register_data(NULL, | ||
name, PLATFORM_DEVID_NONE, pdata, sz); | ||
if (IS_ERR(pdev)) | ||
pr_err("failed registering %s: %ld\n", name, PTR_ERR(pdev)); | ||
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return pdev; | ||
} | ||
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static int __init tink_board_init(void) | ||
{ | ||
int ret = 0; | ||
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if (!dmi_first_match(tink_systems)) | ||
return -ENODEV; | ||
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/* | ||
* We need to make sure that GPIO60 isn't set to native mode as is default since it's our | ||
* Reset Button. To do this, write to GPIO_USE_SEL2 to have GPIO60 set to GPIO mode. | ||
* This is documented on page 1609 of the PCH datasheet, order number 327879-005US | ||
*/ | ||
outl(inl(0x530) | BIT(28), 0x530); | ||
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gpiod_add_lookup_table(&tink_leds_table); | ||
gpiod_add_lookup_table(&tink_keys_table); | ||
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tink_leds_pdev = tink_create_dev("leds-gpio", | ||
&tink_leds_pdata, sizeof(tink_leds_pdata)); | ||
if (IS_ERR(tink_leds_pdev)) { | ||
ret = ERR_PTR(tink_leds_pdev); | ||
goto err; | ||
} | ||
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tink_keys_pdev = tink_create_dev("gpio-keys-polled", | ||
&tink_buttons_pdata, sizeof(tink_buttons_pdata)); | ||
if (IS_ERR(tink_keys_pdev)) { | ||
ret = ERR_PTR(tink_keys_pdev); | ||
platform_device_unregister(tink_leds_pdev); | ||
goto err; | ||
} | ||
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return ret; | ||
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err: | ||
gpiod_remove_lookup_table(&tink_keys_table); | ||
gpiod_remove_lookup_table(&tink_leds_table); | ||
return ret; | ||
} | ||
module_init(tink_board_init); | ||
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static void __exit tink_board_exit(void) | ||
{ | ||
platform_device_unregister(tink_keys_pdev); | ||
platform_device_unregister(tink_leds_pdev); | ||
gpiod_remove_lookup_table(&tink_keys_table); | ||
gpiod_remove_lookup_table(&tink_leds_table); | ||
} | ||
module_exit(tink_board_exit); | ||
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MODULE_AUTHOR("Chris Blake <chrisrblake93@gmail.com>"); | ||
MODULE_DESCRIPTION("Cisco Meraki MX100 Platform Driver"); | ||
MODULE_LICENSE("GPL"); | ||
MODULE_ALIAS("platform:meraki-mx100"); |