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@metanate.com>
Tested-by: Tom Rini <trini@konsulko.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/codecs/rt5677.c b/sound/soc/codecs/rt5677.c
index da9483c1c6fbbf53edbf78c6570618815ace8d69..0e7aba1af8810893fb9fb7f9a24507e3e32bdcc8 100644 (file)
--- 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