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authorHans de Goede <hdegoede@redhat.com>2022-03-07 18:38:44 +0100
committerLee Jones <lee.jones@linaro.org>2022-03-23 14:51:51 +0000
commit9ed55e9ac536a3d60e5dd75def3e9158d1d09f5e (patch)
tree6f2eba86779df6bc56dee296994e81d7bf971ef2 /drivers/mfd
parent3cf2b4344b651b94d62411963e666c9cb5b99e62 (diff)
downloadlinux-9ed55e9ac536a3d60e5dd75def3e9158d1d09f5e.tar.bz2
mfd: arizona-spi: Add Android board ACPI table handling
x86/ACPI boards with an arizona WM5102 codec ship with either Windows or Android as factory installed OS. The ACPI fwnode for the codec on Android boards misses 2 things compared to the Windows boards (this is hardcoded in the Android board kernels): 1. There is no CLKE ACPI method to enabe the 32 KHz clock the codec needs for jack-detection. 2. The GPIOs used by the codec are not listed in the fwnode for the codec. The ACPI tables on x86/ACPI boards shipped with Android being incomplete happens a lot. The special drivers/platform/x86/x86-android-tablets.c module contains DMI based per model handling to compensate for this. This module will enable the 32KHz clock through the pinctrl framework to fix 1. and it will also register a gpio-lookup table for all GPIOs needed by the codec + machine driver, including the GPIOs coming from the codec itself. Add an arizona_spi_acpi_android_probe() function which waits for the x86-android-tablets to have set things up before continue with probing the arizona WM5102 codec. Acked-by: Charles Keepax <ckeepax@opensource.cirrus.com> Signed-off-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Lee Jones <lee.jones@linaro.org> Link: https://lore.kernel.org/r/20220307173844.199135-2-hdegoede@redhat.com
Diffstat (limited to 'drivers/mfd')
-rw-r--r--drivers/mfd/arizona-spi.c35
1 files changed, 34 insertions, 1 deletions
diff --git a/drivers/mfd/arizona-spi.c b/drivers/mfd/arizona-spi.c
index 6f8076439e74..16a675149b11 100644
--- a/drivers/mfd/arizona-spi.c
+++ b/drivers/mfd/arizona-spi.c
@@ -81,6 +81,30 @@ static int arizona_spi_acpi_windows_probe(struct arizona *arizona)
return 0;
}
+/* For ACPI tables from boards which ship with Android as factory OS */
+static int arizona_spi_acpi_android_probe(struct arizona *arizona)
+{
+ int ret;
+
+ /*
+ * Get the reset GPIO, treating -ENOENT as -EPROBE_DEFER to wait for
+ * the x86-android-tablets module to register the board specific GPIO
+ * lookup table.
+ */
+ arizona->pdata.reset = devm_gpiod_get(arizona->dev, "reset", GPIOD_OUT_LOW);
+ if (IS_ERR(arizona->pdata.reset)) {
+ ret = PTR_ERR(arizona->pdata.reset);
+ if (ret == -ENOENT) {
+ dev_info_once(arizona->dev,
+ "Deferring probe till GPIO lookup is registered\n");
+ ret = -EPROBE_DEFER;
+ }
+ return dev_err_probe(arizona->dev, ret, "getting reset GPIO\n");
+ }
+
+ return 0;
+}
+
/*
* The AOSP 3.5 mm Headset: Accessory Specification gives the following values:
* Function A Play/Pause: 0 ohm
@@ -102,9 +126,14 @@ static const struct arizona_micd_range arizona_micd_aosp_ranges[] = {
static int arizona_spi_acpi_probe(struct arizona *arizona)
{
+ struct acpi_device *adev = ACPI_COMPANION(arizona->dev);
int ret;
- ret = arizona_spi_acpi_windows_probe(arizona);
+ if (acpi_dev_hid_uid_match(adev, "10WM5102", NULL))
+ ret = arizona_spi_acpi_android_probe(arizona);
+ else
+ ret = arizona_spi_acpi_windows_probe(arizona);
+
if (ret)
return ret;
@@ -142,6 +171,10 @@ static const struct acpi_device_id arizona_acpi_match[] = {
.id = "WM510205",
.driver_data = WM5102,
},
+ {
+ .id = "10WM5102",
+ .driver_data = WM5102,
+ },
{ }
};
MODULE_DEVICE_TABLE(acpi, arizona_acpi_match);