[PATCH v3 3/3] input: misc: rt5120: Add power key support

cy_huang
2022-07-14T06:42:58Z

From: ChiYuan Huang <cy_huang@richtek.com>

Add RT5120 PMIC power key support.

Signed-off-by: ChiYuan Huang <cy_huang@richtek.com>
---
Since v3:
- Simplify the power key irq handler key report
- Since press and release irq not needed to keep in private data, change 'press',
'release' irq as local variable only.
- Fix Kconfig typo for pwrkey.

---
drivers/input/misc/Kconfig | 9 ++++
drivers/input/misc/Makefile | 1 +
drivers/input/misc/rt5120-pwrkey.c | 105 +++++++++++++++++++++++++++++++++++++
3 files changed, 115 insertions(+)
create mode 100644 drivers/input/misc/rt5120-pwrkey.c

diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig
index a18ab73..92daa4d 100644
--- a/drivers/input/misc/Kconfig
+++ b/drivers/input/misc/Kconfig
@@ -891,6 +891,15 @@ 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-pwrkey.
+
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 28dfc44..d1fb00e 100644
--- a/drivers/input/misc/Makefile
+++ b/drivers/input/misc/Makefile
@@ -69,6 +69,7 @@ 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..b6a5ac4
--- /dev/null
+++ b/drivers/input/misc/rt5120-pwrkey.c
@@ -0,0 +1,105 @@
+// 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;
+};
+
+static irqreturn_t rt5120_pwrkey_handler(int irq, void *devid)
+{
+ struct rt5120_priv *priv = devid;
+ unsigned int stat;
+ int ret;
+
+ ret = regmap_read(priv->regmap, RT5120_REG_INTSTAT, &stat);
+ if (ret)
+ return IRQ_NONE;
+
+ input_report_key(priv->input, KEY_POWER,
+ !(stat & RT5120_PWRKEYSTAT_MASK));
+ input_sync(priv->input);
+
+ return IRQ_HANDLED;
+}
+
+static int rt5120_pwrkey_probe(struct platform_device *pdev)
+{
+ struct rt5120_priv *priv;
+ struct device *dev = &pdev->dev;
+ int press_irq, release_irq;
+ int ret;
+
+ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ priv->regmap = dev_get_regmap(dev->parent, NULL);
+ if (!priv->regmap)
+ return dev_err_probe(dev, -ENODEV, "Failed to init regmap\n");
+
+ press_irq = platform_get_irq_byname(pdev, "pwrkey-press");
+ if (press_irq < 0)
+ return press_irq;
+
+ release_irq = platform_get_irq_byname(pdev, "pwrkey-release");
+ if (release_irq < 0)
+ return release_irq;
+
+ /* Make input device be device resource managed */
+ priv->input = devm_input_allocate_device(dev);
+ if (!priv->input)
+ return dev_err_probe(dev, -ENOMEM,
+ "Failed to allocate input device\n");
+
+ priv->input->name = "rt5120_pwrkey";
+ priv->input->phys = "rt5120_pwrkey/input0";
+ priv->input->id.bustype = BUS_I2C;
+ input_set_capability(priv->input, EV_KEY, KEY_POWER);
+
+ ret = input_register_device(priv->input);
+ if (ret)
+ return dev_err_probe(dev, ret,
+ "Failed to register input device\n");
+
+ ret = devm_request_threaded_irq(dev, press_irq, NULL,
+ rt5120_pwrkey_handler, 0,
+ "pwrkey-press", priv);
+ if (ret)
+ return dev_err_probe(dev, ret,
+ "Failed to register pwrkey press irq\n");
+
+ return devm_request_threaded_irq(dev, release_irq, NULL,
+ rt5120_pwrkey_handler, 0,
+ "pwrkey-release", priv);
+}
+
+static const struct of_device_id r5120_pwrkey_match_table[] = {
+ { .compatible = "richtek,rt5120-pwrkey" },
+ {}
+};
+MODULE_DEVICE_TABLE(of, r5120_pwrkey_match_table);
+
+static struct platform_driver rt5120_pwrkey_driver = {
+ .driver = {
+ .name = "rt5120-pwrkey",
+ .of_match_table = r5120_pwrkey_match_table,
+ },
+ .probe = rt5120_pwrkey_probe,
+};
+module_platform_driver(rt5120_pwrkey_driver);
+
+MODULE_AUTHOR("ChiYuan Huang <cy_huang@richtek.com>");
+MODULE_DESCRIPTION("Richtek RT5120 power key driver");
+MODULE_LICENSE("GPL v2");
--
2.7.4