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button: qcom-pmic: allow to specify code in devicetree

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Most device vendors put "Volume Down" button onto PMIC RESIN.
But Sony is special: see
dts/upstream/src/arm64/qcom/sdm630-sony-xperia-nile.dtsi or [1].
They put "Volume Down" on PMIC GPIO 7 where others usually put
"Volume Up", and KEY_VOLUMEUP is inside &pon_resin.

Currently if you boot U-Boot on such Sony device, you end up
with 2 "Volume Down" buttons, and no "Volume Up", which makes
navigating menu problematic.

Support reading devicetree "linux,code" property and override
statically defined button code & label based on that.

[1] https://elixir.bootlin.com/linux/v6.15-rc3/source/arch/
arm64/boot/dts/qcom/sdm630-sony-xperia-nile.dtsi#L263

Signed-off-by: Alexey Minnekhanov <alexeymin@postmarketos.org>
Signed-off-by: Alexey Minnekhanov <alexeymin@minlexx.ru>
Reviewed-by: Casey Connolly <casey.connolly@linaro.org>
Link: https://lore.kernel.org/r/20250424014811.3809818-1-alexeymin@minlexx.ru
Signed-off-by: Casey Connolly <casey.connolly@linaro.org>
This commit is contained in:
Alexey Minnekhanov 2025-04-24 04:48:11 +03:00 committed by Casey Connolly
parent 1079d4bf2e
commit c92bf21e73
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GPG Key ID: 0583312B195F64B6
1 changed files with 15 additions and 0 deletions
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15
drivers/button/button-qcom-pmic.c
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@ -143,6 +143,21 @@ static int qcom_pwrkey_probe(struct udevice *dev)
priv->base = base;
ret = dev_read_u32(dev, "linux,code", &priv->code);
if (ret == 0) {
/* convert key, if read OK */
switch (priv->code) {
case KEY_VOLUMEDOWN:
priv->code = KEY_DOWN;
uc_plat->label = "Volume Down";
break;
case KEY_VOLUMEUP:
priv->code = KEY_UP;
uc_plat->label = "Volume Up";
break;
}
}
/* Do a sanity check */
ret = pmic_reg_read(priv->pmic, priv->base + REG_TYPE);
if (ret != 0x1 && ret != 0xb) {