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| author | Hans de Goede <hdegoede@redhat.com> | 2022-03-07 18:38:44 +0100 |
|---|---|---|
| committer | Lee Jones <lee.jones@linaro.org> | 2022-03-23 14:51:51 +0000 |
| commit | 9ed55e9ac536a3d60e5dd75def3e9158d1d09f5e (patch) | |
| tree | 6f2eba86779df6bc56dee296994e81d7bf971ef2 /drivers | |
| parent | 3cf2b4344b651b94d62411963e666c9cb5b99e62 (diff) | |
| download | linux-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')
| -rw-r--r-- | drivers/mfd/arizona-spi.c | 35 |
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); |