Input: add power key driver for Rockchip RK805 PMIC

This driver provides a input driver for the power key on the Rockchip RK805
PMIC.

Signed-off-by: Joseph Chen <chenjh@rock-chips.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig
index 3872488c3fd7b9766c852a752dfcc3742efc9532..f47e836eaa0f6de06071a3299be8f91b61687db5 100644 (file)
--- a/drivers/input/misc/Kconfig
+++ b/drivers/input/misc/Kconfig
@@ -581,6 +581,17 @@ config INPUT_PWM_BEEPER
          To compile this driver as a module, choose M here: the module will be
          called pwm-beeper.
 
+config INPUT_RK805_PWRKEY
+       tristate "Rockchip RK805 PMIC power key support"
+       depends on MFD_RK808
+       help
+         Select this option to enable power key driver for RK805.
+
+         If unsure, say N.
+
+         To compile this driver as a module, choose M here: the module will be
+         called rk805_pwrkey.
+
 config INPUT_GPIO_ROTARY_ENCODER
        tristate "Rotary encoders connected to GPIO pins"
        depends on GPIOLIB || COMPILE_TEST

diff --git a/drivers/input/misc/Makefile b/drivers/input/misc/Makefile
index b923a9828c888d51db32ad4139417a9ee838bea9..1072e0760c1989f28c0236faaf9e408912e80d88 100644 (file)
--- a/drivers/input/misc/Makefile
+++ b/drivers/input/misc/Makefile
@@ -64,6 +64,7 @@ obj-$(CONFIG_INPUT_REGULATOR_HAPTIC)  += regulator-haptic.o
 obj-$(CONFIG_INPUT_RETU_PWRBUTTON)     += retu-pwrbutton.o
 obj-$(CONFIG_INPUT_AXP20X_PEK)         += axp20x-pek.o
 obj-$(CONFIG_INPUT_GPIO_ROTARY_ENCODER)        += rotary_encoder.o
+obj-$(CONFIG_INPUT_RK805_PWRKEY)       += rk805-pwrkey.o
 obj-$(CONFIG_INPUT_SGI_BTNS)           += sgi_btns.o
 obj-$(CONFIG_INPUT_SIRFSOC_ONKEY)      += sirfsoc-onkey.o
 obj-$(CONFIG_INPUT_SOC_BUTTON_ARRAY)   += soc_button_array.o

diff --git a/drivers/input/misc/rk805-pwrkey.c b/drivers/input/misc/rk805-pwrkey.c
new file mode 100644 (file)
index 0000000..9210039
--- /dev/null
+++ b/drivers/input/misc/rk805-pwrkey.c
@@ -0,0 +1,111 @@
+/*
+ * Rockchip RK805 PMIC Power Key driver
+ *
+ * Copyright (c) 2017, Fuzhou Rockchip Electronics Co., Ltd
+ *
+ * Author: Joseph Chen <chenjh@rock-chips.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under  the terms of the GNU General  Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ */
+
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/input.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+
+static irqreturn_t pwrkey_fall_irq(int irq, void *_pwr)
+{
+       struct input_dev *pwr = _pwr;
+
+       input_report_key(pwr, KEY_POWER, 1);
+       input_sync(pwr);
+
+       return IRQ_HANDLED;
+}
+
+static irqreturn_t pwrkey_rise_irq(int irq, void *_pwr)
+{
+       struct input_dev *pwr = _pwr;
+
+       input_report_key(pwr, KEY_POWER, 0);
+       input_sync(pwr);
+
+       return IRQ_HANDLED;
+}
+
+static int rk805_pwrkey_probe(struct platform_device *pdev)
+{
+       struct input_dev *pwr;
+       int fall_irq, rise_irq;
+       int err;
+
+       pwr = devm_input_allocate_device(&pdev->dev);
+       if (!pwr) {
+               dev_err(&pdev->dev, "Can't allocate power button\n");
+               return -ENOMEM;
+       }
+
+       pwr->name = "rk805 pwrkey";
+       pwr->phys = "rk805_pwrkey/input0";
+       pwr->id.bustype = BUS_HOST;
+       input_set_capability(pwr, EV_KEY, KEY_POWER);
+
+       fall_irq = platform_get_irq(pdev, 0);
+       if (fall_irq < 0) {
+               dev_err(&pdev->dev, "Can't get fall irq: %d\n", fall_irq);
+               return fall_irq;
+       }
+
+       rise_irq = platform_get_irq(pdev, 1);
+       if (rise_irq < 0) {
+               dev_err(&pdev->dev, "Can't get rise irq: %d\n", rise_irq);
+               return rise_irq;
+       }
+
+       err = devm_request_any_context_irq(&pwr->dev, fall_irq,
+                                          pwrkey_fall_irq,
+                                          IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
+                                          "rk805_pwrkey_fall", pwr);
+       if (err < 0) {
+               dev_err(&pdev->dev, "Can't register fall irq: %d\n", err);
+               return err;
+       }
+
+       err = devm_request_any_context_irq(&pwr->dev, rise_irq,
+                                          pwrkey_rise_irq,
+                                          IRQF_TRIGGER_RISING | IRQF_ONESHOT,
+                                          "rk805_pwrkey_rise", pwr);
+       if (err < 0) {
+               dev_err(&pdev->dev, "Can't register rise irq: %d\n", err);
+               return err;
+       }
+
+       err = input_register_device(pwr);
+       if (err) {
+               dev_err(&pdev->dev, "Can't register power button: %d\n", err);
+               return err;
+       }
+
+       platform_set_drvdata(pdev, pwr);
+       device_init_wakeup(&pdev->dev, true);
+
+       return 0;
+}
+
+static struct platform_driver rk805_pwrkey_driver = {
+       .probe  = rk805_pwrkey_probe,
+       .driver = {
+               .name = "rk805-pwrkey",
+       },
+};
+module_platform_driver(rk805_pwrkey_driver);
+
+MODULE_AUTHOR("Joseph Chen <chenjh@rock-chips.com>");
+MODULE_DESCRIPTION("RK805 PMIC Power Key driver");
+MODULE_LICENSE("GPL");