ASoC: tas2764: Extend driver to SN012776

SN012776 is a speaker amp chip found in Apple's 2021 laptops. It appears similar and more-or-less compatible to TAS2764. Extend the TAS2764 driver with some SN012776 specifics and configure the chip assuming it's in one of the Apple machines. Signed-off-by: Martin Povišer <povik+lin@cutebit.org>
AsahiLinux · Sep 22, 2022 · 040ba7f · 040ba7f
1 parent 3724974
commit 040ba7f
Show file tree

Hide file tree

Showing 2 changed files with 47 additions and 2 deletions.
diff --git a/sound/soc/codecs/tas2764.c b/sound/soc/codecs/tas2764.c
@@ -16,6 +16,7 @@
 #include <linux/regmap.h>
 #include <linux/of.h>
 #include <linux/of_gpio.h>
+#include <linux/of_device.h>
 #include <linux/slab.h>
 #include <sound/soc.h>
 #include <sound/pcm.h>
@@ -25,13 +26,19 @@
 
 #include "tas2764.h"
 
+enum tas2764_devid {
+	DEVID_TAS2764  = 0,
+	DEVID_SN012776 = 1
+};
+
 struct tas2764_priv {
 	struct snd_soc_component *component;
 	struct gpio_desc *reset_gpio;
 	struct gpio_desc *sdz_gpio;
 	struct regmap *regmap;
 	struct device *dev;
 	int irq;
+	enum tas2764_devid devid;
 
 	int v_sense_slot;
 	int i_sense_slot;
@@ -535,10 +542,16 @@ static struct snd_soc_dai_driver tas2764_dai_driver[] = {
 	},
 };
 
+static uint8_t sn012776_bop_presets[] = {
+	0x01, 0x32, 0x02, 0x22, 0x83, 0x2d, 0x80, 0x02, 0x06,
+	0x32, 0x46, 0x30, 0x02, 0x06, 0x38, 0x40, 0x30, 0x02,
+	0x06, 0x3e, 0x37, 0x30, 0xff, 0xe6
+};
+
 static int tas2764_codec_probe(struct snd_soc_component *component)
 {
 	struct tas2764_priv *tas2764 = snd_soc_component_get_drvdata(component);
-	int ret;
+	int ret, i;
 
 	tas2764->component = component;
 
@@ -587,6 +600,23 @@ static int tas2764_codec_probe(struct snd_soc_component *component)
 	if (ret < 0)
 		return ret;
 
+	if (tas2764->devid == DEVID_SN012776) {
+		ret = snd_soc_component_update_bits(component, TAS2764_PWR_CTRL,
+					TAS2764_PWR_CTRL_BOP_SRC,
+					TAS2764_PWR_CTRL_BOP_SRC);
+		if (ret < 0)
+			return ret;
+
+		for (i = 0; i < ARRAY_SIZE(sn012776_bop_presets); i++) {
+			ret = snd_soc_component_write(component,
+						TAS2764_BOP_CFG0 + i,
+						sn012776_bop_presets[i]);
+
+			if (ret < 0)
+				return ret;
+		}
+	}
+
 	return 0;
 }
 
@@ -706,16 +736,27 @@ static int tas2764_parse_dt(struct device *dev, struct tas2764_priv *tas2764)
 	return 0;
 }
 
+static const struct of_device_id tas2764_of_match[];
+
 static int tas2764_i2c_probe(struct i2c_client *client)
 {
 	struct tas2764_priv *tas2764;
+	const struct of_device_id *of_id = NULL;
 	int result;
 
 	tas2764 = devm_kzalloc(&client->dev, sizeof(struct tas2764_priv),
 			       GFP_KERNEL);
 	if (!tas2764)
 		return -ENOMEM;
 
+	if (client->dev.of_node)
+		of_id = of_match_device(tas2764_of_match, &client->dev);	
+
+	if (of_id)
+		tas2764->devid = (enum tas2764_devid) of_id->data;
+	else
+		tas2764->devid = DEVID_TAS2764;
+
 	tas2764->dev = &client->dev;
 	tas2764->irq = client->irq;
 	i2c_set_clientdata(client, tas2764);
@@ -752,7 +793,8 @@ MODULE_DEVICE_TABLE(i2c, tas2764_i2c_id);
 
 #if defined(CONFIG_OF)
 static const struct of_device_id tas2764_of_match[] = {
-	{ .compatible = "ti,tas2764" },
+	{ .compatible = "ti,tas2764",  .data = (void*) DEVID_TAS2764 },
+	{ .compatible = "ti,sn012776", .data = (void*) DEVID_SN012776 },
 	{},
 };
 MODULE_DEVICE_TABLE(of, tas2764_of_match);

diff --git a/sound/soc/codecs/tas2764.h b/sound/soc/codecs/tas2764.h
@@ -29,6 +29,7 @@
 #define TAS2764_PWR_CTRL_ACTIVE		0x0
 #define TAS2764_PWR_CTRL_MUTE		BIT(0)
 #define TAS2764_PWR_CTRL_SHUTDOWN	BIT(1)
+#define TAS2764_PWR_CTRL_BOP_SRC	BIT(7)
 
 #define TAS2764_VSENSE_POWER_EN		3
 #define TAS2764_ISENSE_POWER_EN		4
@@ -110,4 +111,6 @@
 #define TAS2764_INT_CLK_CFG             TAS2764_REG(0x0, 0x5c)
 #define TAS2764_INT_CLK_CFG_IRQZ_CLR    BIT(2)
 
+#define TAS2764_BOP_CFG0                TAS2764_REG(0X0, 0x1d)
+
 #endif /* __TAS2764__ */