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SubjectRe: [PATCH 4/4] input: misc: rt5120: Add power key support
From
On 07/06/2022 07:52, cy_huang wrote:
> From: ChiYuan Huang <cy_huang@richtek.com>
>
> Add RT5120 PMIC power key support.
>
> Signed-off-by: ChiYuan Huang <cy_huang@richtek.com>
> ---
> drivers/input/misc/Kconfig | 9 +++
> drivers/input/misc/Makefile | 1 +
> drivers/input/misc/rt5120-pwrkey.c | 115 +++++++++++++++++++++++++++++++++++++
> 3 files changed, 125 insertions(+)
> create mode 100644 drivers/input/misc/rt5120-pwrkey.c
>
> diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig
> index dd5227c..9c0d814 100644
> --- a/drivers/input/misc/Kconfig
> +++ b/drivers/input/misc/Kconfig
> @@ -881,6 +881,15 @@ config INPUT_SC27XX_VIBRA
> To compile this driver as a module, choose M here. The module will
> be called sc27xx_vibra.
>
> +config INPUT_RT5120_PWRKEY
> + tristate "RT5120 PMIC power key support"
> + depends on MFD_RT5120
> + help
> + This enables support for RT5120 PMIC power key driver.
> +
> + To compile this driver as a module, choose M here. the module will
> + be called rt5120-pwerkey.
> +
> config INPUT_STPMIC1_ONKEY
> tristate "STPMIC1 PMIC Onkey support"
> depends on MFD_STPMIC1
> diff --git a/drivers/input/misc/Makefile b/drivers/input/misc/Makefile
> index b92c53a..164ea20 100644
> --- a/drivers/input/misc/Makefile
> +++ b/drivers/input/misc/Makefile
> @@ -68,6 +68,7 @@ obj-$(CONFIG_INPUT_RAVE_SP_PWRBUTTON) += rave-sp-pwrbutton.o
> obj-$(CONFIG_INPUT_RB532_BUTTON) += rb532_button.o
> obj-$(CONFIG_INPUT_REGULATOR_HAPTIC) += regulator-haptic.o
> obj-$(CONFIG_INPUT_RETU_PWRBUTTON) += retu-pwrbutton.o
> +obj-$(CONFIG_INPUT_RT5120_PWRKEY) += rt5120-pwrkey.o
> obj-$(CONFIG_INPUT_AXP20X_PEK) += axp20x-pek.o
> obj-$(CONFIG_INPUT_GPIO_ROTARY_ENCODER) += rotary_encoder.o
> obj-$(CONFIG_INPUT_RK805_PWRKEY) += rk805-pwrkey.o
> diff --git a/drivers/input/misc/rt5120-pwrkey.c b/drivers/input/misc/rt5120-pwrkey.c
> new file mode 100644
> index 00000000..42bd2f3
> --- /dev/null
> +++ b/drivers/input/misc/rt5120-pwrkey.c
> @@ -0,0 +1,115 @@
> +// SPDX-License-Identifier: GPL-2.0+
> +
> +#include <linux/bits.h>
> +#include <linux/input.h>
> +#include <linux/interrupt.h>
> +#include <linux/kernel.h>
> +#include <linux/module.h>
> +#include <linux/mod_devicetable.h>
> +#include <linux/platform_device.h>
> +#include <linux/regmap.h>
> +
> +#define RT5120_REG_INTSTAT 0x1E
> +#define RT5120_PWRKEYSTAT_MASK BIT(7)
> +
> +struct rt5120_priv {
> + struct regmap *regmap;
> + struct input_dev *input;
> + int press_irq;
> + int release_irq;
> +};
> +
> +static irqreturn_t rt5120_pwrkey_handler(int irq, void *devid)
> +{
> + struct rt5120_priv *priv = devid;
> + unsigned int stat;
> + bool is_pressed;
> + int ret;
> +
> + ret = regmap_read(priv->regmap, RT5120_REG_INTSTAT, &stat);
> + if (ret)
> + return IRQ_NONE;
> +
> + is_pressed = !(stat & RT5120_PWRKEYSTAT_MASK);
> +
> + if ((is_pressed && irq == priv->press_irq) ||
> + (!is_pressed && irq == priv->release_irq)) {
> + input_report_key(priv->input, KEY_POWER, is_pressed);
> + input_sync(priv->input);
> + }
> +
> + return IRQ_HANDLED;
> +}
> +
> +static int rt5120_pwrkey_probe(struct platform_device *pdev)
> +{
> + struct rt5120_priv *priv;
> + int ret;
> +
> + priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
> + if (!priv)
> + return -ENOMEM;
> +
> + priv->regmap = dev_get_regmap(pdev->dev.parent, NULL);
> + if (!priv->regmap) {
> + dev_err(&pdev->dev, "Failed to init regmap\n");
> + return -ENODEV;
> + }
> +
> + priv->press_irq = platform_get_irq_byname(pdev, "pwrkey-press");
> + if (priv->press_irq < 0)
> + return priv->press_irq;
> +
> + priv->release_irq = platform_get_irq_byname(pdev, "pwrkey-release");
> + if (priv->release_irq < 0)
> + return priv->release_irq;

Not described in the bindings. All properties need to be documented.


Best regards,
Krzysztof

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