[alsa-devel] Applied "ASoC: rt5677: Add ACPI support" to the asoc tree

[Mark Brown]

The patch

   ASoC: rt5677: Add ACPI support

has been applied to the asoc tree at

   git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

>From 89128534f925711eea1653c264683b7d14a46530 Mon Sep 17 00:00:00 2001
From: John Keeping <john at metanate.com>
Date: Wed, 24 Aug 2016 22:06:35 +0100
Subject: [PATCH] ASoC: rt5677: Add ACPI support

The Chromebook Pixel 2015 uses this codec with the ACPI ID RT5677CE, but
does not use the standard DT property names so add a new function to
parse the codec properties from these ACPI properties.

Also, the GPIOs are only available by index, so we need to register a
mapping to allow machine drivers to access the GPIOs by name.

Signed-off-by: John Keeping <john at metanate.com>
Tested-by: Tom Rini <trini at konsulko.com>
Signed-off-by: Mark Brown <broonie at kernel.org>
---
 sound/soc/codecs/rt5677.c | 53 ++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 52 insertions(+), 1 deletion(-)

diff --git a/sound/soc/codecs/rt5677.c b/sound/soc/codecs/rt5677.c
index da9483c1c6fb..0e7aba1af881 100644
--- a/sound/soc/codecs/rt5677.c
+++ b/sound/soc/codecs/rt5677.c
@@ -9,6 +9,7 @@
  * published by the Free Software Foundation.
  */
 
+#include <linux/acpi.h>
 #include <linux/fs.h>
 #include <linux/module.h>
 #include <linux/moduleparam.h>
@@ -40,6 +41,15 @@
 
 #define RT5677_PR_BASE (RT5677_PR_RANGE_BASE + (0 * RT5677_PR_SPACING))
 
+/* GPIO indexes defined by ACPI */
+enum {
+	RT5677_GPIO_PLUG_DET		= 0,
+	RT5677_GPIO_MIC_PRESENT_L	= 1,
+	RT5677_GPIO_HOTWORD_DET_L	= 2,
+	RT5677_GPIO_DSP_INT		= 3,
+	RT5677_GPIO_HP_AMP_SHDN_L	= 4,
+};
+
 static const struct regmap_range_cfg rt5677_ranges[] = {
 	{
 		.name = "PR",
@@ -5018,10 +5028,47 @@ static const struct regmap_config rt5677_regmap = {
 static const struct i2c_device_id rt5677_i2c_id[] = {
 	{ "rt5677", RT5677 },
 	{ "rt5676", RT5676 },
+	{ "RT5677CE:00", RT5677 },
 	{ }
 };
 MODULE_DEVICE_TABLE(i2c, rt5677_i2c_id);
 
+static const struct acpi_gpio_params plug_det_gpio = { RT5677_GPIO_PLUG_DET, 0, false };
+static const struct acpi_gpio_params mic_present_gpio = { RT5677_GPIO_MIC_PRESENT_L, 0, false };
+static const struct acpi_gpio_params headphone_enable_gpio = { RT5677_GPIO_HP_AMP_SHDN_L, 0, false };
+
+static const struct acpi_gpio_mapping bdw_rt5677_gpios[] = {
+	{ "plug-det-gpios", &plug_det_gpio, 1 },
+	{ "mic-present-gpios", &mic_present_gpio, 1 },
+	{ "headphone-enable-gpios", &headphone_enable_gpio, 1 },
+	{ NULL },
+};
+
+static void rt5677_read_acpi_properties(struct rt5677_priv *rt5677,
+		struct device *dev)
+{
+	int ret;
+	u32 val;
+
+	ret = acpi_dev_add_driver_gpios(ACPI_COMPANION(dev),
+			bdw_rt5677_gpios);
+	if (ret)
+		dev_warn(dev, "Failed to add driver gpios\n");
+
+	if (!device_property_read_u32(dev, "DCLK", &val))
+		rt5677->pdata.dmic2_clk_pin = val;
+
+	rt5677->pdata.in1_diff = device_property_read_bool(dev, "IN1");
+	rt5677->pdata.in2_diff = device_property_read_bool(dev, "IN2");
+	rt5677->pdata.lout1_diff = device_property_read_bool(dev, "OUT1");
+	rt5677->pdata.lout2_diff = device_property_read_bool(dev, "OUT2");
+	rt5677->pdata.lout3_diff = device_property_read_bool(dev, "OUT3");
+
+	device_property_read_u32(dev, "JD1", &rt5677->pdata.jd1_gpio);
+	device_property_read_u32(dev, "JD2", &rt5677->pdata.jd2_gpio);
+	device_property_read_u32(dev, "JD3", &rt5677->pdata.jd3_gpio);
+}
+
 static void rt5677_read_device_properties(struct rt5677_priv *rt5677,
 		struct device *dev)
 {
@@ -5127,8 +5174,12 @@ static int rt5677_i2c_probe(struct i2c_client *i2c,
 
 	if (pdata)
 		rt5677->pdata = *pdata;
-	else
+	else if (i2c->dev.of_node)
 		rt5677_read_device_properties(rt5677, &i2c->dev);
+	else if (ACPI_HANDLE(&i2c->dev))
+		rt5677_read_acpi_properties(rt5677, &i2c->dev);
+	else
+		return -EINVAL;
 
 	/* pow-ldo2 and reset are optional. The codec pins may be statically
 	 * connected on the board without gpios. If the gpio device property
-- 
2.9.3