From: pascal paillet <p.paillet@xxxxxx>
The stpmu1 pmic is able to manage an onkey button. This driver exposes
the stpmu1 onkey as an input device. It can also be configured to
shut-down the power supplies on a long key-press with an adjustable
duration.
Signed-off-by: pascal paillet <p.paillet@xxxxxx>
---
drivers/input/misc/Kconfig | 11 ++
drivers/input/misc/Makefile | 2 +
drivers/input/misc/stpmu1_onkey.c | 321 ++++++++++++++++++++++++++++++++++++++
3 files changed, 334 insertions(+)
create mode 100644 drivers/input/misc/stpmu1_onkey.c
diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig
index c25606e..d020971 100644
--- a/drivers/input/misc/Kconfig
+++ b/drivers/input/misc/Kconfig
@@ -841,4 +841,15 @@ config INPUT_RAVE_SP_PWRBUTTON
To compile this driver as a module, choose M here: the
module will be called rave-sp-pwrbutton.
+config INPUT_STPMU1_ONKEY
+ tristate "STPMU1 PMIC Onkey support"
+ depends on MFD_STPMU1
+ help
+ Say Y to enable support of onkey embedded into STPMU1 PMIC. onkey
+ can be used to wakeup from low power modes and force a shut-down on
+ long press.
+
+ To compile this driver as a module, choose M here: the
+ module will be called stpmu1_onkey.
+
endif
diff --git a/drivers/input/misc/Makefile b/drivers/input/misc/Makefile
index 72cde28..cc60dc1 100644
--- a/drivers/input/misc/Makefile
+++ b/drivers/input/misc/Makefile
@@ -70,6 +70,7 @@ obj-$(CONFIG_INPUT_SGI_BTNS) += sgi_btns.o
obj-$(CONFIG_INPUT_SIRFSOC_ONKEY) += sirfsoc-onkey.o
obj-$(CONFIG_INPUT_SOC_BUTTON_ARRAY) += soc_button_array.o
obj-$(CONFIG_INPUT_SPARCSPKR) += sparcspkr.o
+obj-$(CONFIG_INPUT_STPMU1_ONKEY) += stpmu1_onkey.o
obj-$(CONFIG_INPUT_TPS65218_PWRBUTTON) += tps65218-pwrbutton.o
obj-$(CONFIG_INPUT_TWL4030_PWRBUTTON) += twl4030-pwrbutton.o
obj-$(CONFIG_INPUT_TWL4030_VIBRA) += twl4030-vibra.o
@@ -80,3 +81,4 @@ obj-$(CONFIG_INPUT_WM831X_ON) += wm831x-on.o
obj-$(CONFIG_INPUT_XEN_KBDDEV_FRONTEND) += xen-kbdfront.o
obj-$(CONFIG_INPUT_YEALINK) += yealink.o
obj-$(CONFIG_INPUT_IDEAPAD_SLIDEBAR) += ideapad_slidebar.o
+
diff --git a/drivers/input/misc/stpmu1_onkey.c b/drivers/input/misc/stpmu1_onkey.c
new file mode 100644
index 0000000..084a31f
--- /dev/null
+++ b/drivers/input/misc/stpmu1_onkey.c
@@ -0,0 +1,321 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) STMicroelectronics 2018 - All Rights Reserved
+ * Author: Philippe Peurichard <philippe.peurichard@xxxxxx>,
+ * Pascal Paillet <p.paillet@xxxxxx> for STMicroelectronics.
+ */
+
+#include <linux/input.h>
+#include <linux/interrupt.h>
+#include <linux/mfd/stpmu1.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+
+/**
+ * struct stpmu1_onkey - OnKey data
+ * @pmic: pointer to STPMU1 PMIC device
+ * @input_dev: pointer to input device
+ * @irq_falling: irq that we are hooked on to
+ * @irq_rising: irq that we are hooked on to
+ */
+struct stpmu1_onkey {
+ struct stpmu1_dev *pmic;
+ struct input_dev *input_dev;
+ int irq_falling;
+ int irq_rising;
+};
+
+/**
+ * struct pmic_onkey_config - configuration of pmic PONKEYn
+ * @turnoff_enabled: value to enable turnoff condition
+ * @cc_flag_clear: value to clear CC flag in case of PowerOff
+ * trigger by longkey press
+ * @onkey_pullup_val: value of PONKEY PullUp (active or inactive)
+ * @long_press_time_val: value for long press h/w shutdown event
+ */
+struct pmic_onkey_config {
+ bool turnoff_enabled;
+ bool cc_flag_clear;
+ u8 onkey_pullup_val;
+ u8 long_press_time_val;
+};
+
+/**
+ * onkey_falling_irq() - button press isr
+ * @irq: irq
+ * @pmic_onkey: onkey device
+ *
+ * Return: IRQ_HANDLED
+ */
+static irqreturn_t onkey_falling_irq(int irq, void *ponkey)
+{
+ struct stpmu1_onkey *onkey = ponkey;
+ struct input_dev *input_dev = onkey->input_dev;
+
+ input_report_key(input_dev, KEY_POWER, 1);
+ pm_wakeup_event(input_dev->dev.parent, 0);
+ input_sync(input_dev);
+
+ dev_dbg(&input_dev->dev, "Pwr Onkey Falling Interrupt received\n");
+
+ return IRQ_HANDLED;
+}
+
+/**
+ * onkey_rising_irq() - button released isr
+ * @irq: irq
+ * @pmic_onkey: onkey device
+ *
+ * Return: IRQ_HANDLED
+ */
+static irqreturn_t onkey_rising_irq(int irq, void *ponkey)
+{
+ struct stpmu1_onkey *onkey = ponkey;
+ struct input_dev *input_dev = onkey->input_dev;
+
+ input_report_key(input_dev, KEY_POWER, 0);
+ pm_wakeup_event(input_dev->dev.parent, 0);
+ input_sync(input_dev);
+
+ dev_dbg(&input_dev->dev, "Pwr Onkey Rising Interrupt received\n");
+
+ return IRQ_HANDLED;
+}
+
+/**
+ * stpmu1_onkey_dt_params() - device tree parameter parser
+ * @pdev: platform device for the PONKEY
+ * @onkey: pointer to onkey driver data
+ * @config: configuration params to be filled up
+ */
+static int stpmu1_onkey_dt_params(struct platform_device *pdev,
+ struct stpmu1_onkey *onkey,
+ struct pmic_onkey_config *config)
+{
+ struct device *dev = &pdev->dev;
+ struct device_node *np;
+ u32 val;
+
+ np = dev->of_node;
+ if (!np)
+ return -EINVAL;
+
+ onkey->irq_falling = platform_get_irq_byname(pdev, "onkey-falling");
+ if (onkey->irq_falling < 0) {
+ dev_err(dev, "failed: request IRQ onkey-falling %d",
+ onkey->irq_falling);
+ return onkey->irq_falling;
+ }
+
+ onkey->irq_rising = platform_get_irq_byname(pdev, "onkey-rising");
+ if (onkey->irq_rising < 0) {
+ dev_err(dev, "failed: request IRQ onkey-rising %d",
+ onkey->irq_rising);
+ return onkey->irq_rising;
+ }
+
+ if (!of_property_read_u32(np, "st,onkey-long-press-seconds", &val)) {
+ if (val >= 1 && val <= 16) {
+ config->long_press_time_val = (16 - val);
+ } else {
+ dev_warn(dev,
+ "Invalid range of long key pressed timer %d (<16)\n\r",
+ val);
+ }
+ }
+ if (of_get_property(np, "st,onkey-pwroff-enabled", NULL))
+ config->turnoff_enabled = true;
+
+ if (of_get_property(np, "st,onkey-clear-cc-flag", NULL))
+ config->cc_flag_clear = true;
+
+ if (of_get_property(np, "st,onkey-pu-inactive", NULL))
+ config->onkey_pullup_val = PONKEY_PU_ACTIVE;
+
+ dev_dbg(dev, "onkey-switch-off duration=%d seconds\n",
+ config->long_press_time_val);
+
+ return 0;
+}
+
+/**
+ * stpmu1_onkey_probe() - probe
+ * @pdev: platform device for the PONKEY
+ *
+ * Return: 0 for successful probe else appropriate error
+ */
+static int stpmu1_onkey_probe(struct platform_device *pdev)
+{
+ struct stpmu1_dev *pmic = dev_get_drvdata(pdev->dev.parent);
+ struct device *dev = &pdev->dev;
+ struct input_dev *input_dev;
+ struct stpmu1_onkey *onkey;
+ struct pmic_onkey_config config;
+ unsigned int val = 0;
+ int ret;
+
+ onkey = devm_kzalloc(dev, sizeof(*onkey), GFP_KERNEL);
+ if (!onkey)
+ return -ENOMEM;
+
+ memset(&config, 0, sizeof(struct pmic_onkey_config));
+ ret = stpmu1_onkey_dt_params(pdev, onkey, &config);
+ if (ret < 0)
+ goto err;
+
+ input_dev = devm_input_allocate_device(dev);
+ if (!input_dev) {
+ dev_err(dev, "Can't allocate Pwr Onkey Input Device\n");
+ ret = -ENOMEM;
+ goto err;
+ }
+
+ input_dev->name = "pmic_onkey";
+ input_dev->phys = "pmic_onkey/input0";
+ input_dev->dev.parent = dev;
+
+ input_set_capability(input_dev, EV_KEY, KEY_POWER);
+
+ /* Setup Power Onkey Hardware parameters (long key press)*/
+ val = (config.long_press_time_val & PONKEY_TURNOFF_TIMER_MASK);
+ if (config.turnoff_enabled)
+ val |= PONKEY_PWR_OFF;
+ if (config.cc_flag_clear)
+ val |= PONKEY_CC_FLAG_CLEAR;
+ ret = regmap_update_bits(pmic->regmap, PKEY_TURNOFF_CR,
+ PONKEY_TURNOFF_MASK, val);
+ if (ret) {
+ dev_err(dev, "LONG_PRESS_KEY_UPDATE failed: %d\n", ret);
+ goto err;
+ }
+
+ ret = regmap_update_bits(pmic->regmap, PADS_PULL_CR,
+ PONKEY_PU_ACTIVE,
+ config.onkey_pullup_val);
+
+ if (ret) {
+ dev_err(dev, "ONKEY Pads configuration failed: %d\n", ret);
+ goto err;
+ }
+
+ onkey->pmic = pmic;
+ onkey->input_dev = input_dev;
+
+ ret = devm_request_threaded_irq(dev, onkey->irq_falling, NULL,
+ onkey_falling_irq,
+ IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
+ dev_name(dev), onkey);
+ if (ret) {
+ dev_err(dev, "Can't get IRQ for Onkey Falling edge: %d\n", ret);
+ goto err;
+ }
+
+ ret = devm_request_threaded_irq(dev, onkey->irq_rising, NULL,
+ onkey_rising_irq,
+ IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
+ dev_name(dev), onkey);
+ if (ret) {
+ dev_err(dev, "Can't get IRQ for Onkey Rising edge: %d\n", ret);
+ goto err;
+ }
+
+ ret = input_register_device(input_dev);
+ if (ret) {
+ dev_err(dev, "Can't register power button: %d\n", ret);
+ goto err;
+ }
+
+ platform_set_drvdata(pdev, onkey);
+ device_init_wakeup(dev, true);
+
+ dev_dbg(dev, "PMIC Pwr Onkey driver probed\n");
+
+err:
+ return ret;
+}
+
+/**
+ * stpmu1_onkey_remove() - Cleanup on removal
+ * @pdev: platform device for the button
+ *
+ * Return: 0
+ */
+static int stpmu1_onkey_remove(struct platform_device *pdev)
+{
+ struct stpmu1_onkey *onkey = platform_get_drvdata(pdev);
+
+ input_unregister_device(onkey->input_dev);
+ return 0;
+}
+
+#ifdef CONFIG_PM_SLEEP
+
+/**
+ * pmic_onkey_suspend() - suspend handler
+ * @dev: power button device
+ *
+ * Cancel all pending work items for the power button, setup irq for wakeup
+ *
+ * Return: 0
+ */
+static int __maybe_unused stpmu1_onkey_suspend(struct device *dev)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct stpmu1_onkey *onkey = platform_get_drvdata(pdev);
+
+ if (device_may_wakeup(dev)) {
+ enable_irq_wake(onkey->irq_falling);
+ enable_irq_wake(onkey->irq_rising);
+ }
+ return 0;
+}
+
+/**
+ * pmic_onkey_resume() - resume handler
+ * @dev: power button device
+ *
+ * Just disable the wakeup capability of irq here.
+ *
+ * Return: 0
+ */
+static int __maybe_unused stpmu1_onkey_resume(struct device *dev)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ struct stpmu1_onkey *onkey = platform_get_drvdata(pdev);
+
+ if (device_may_wakeup(dev)) {
+ disable_irq_wake(onkey->irq_falling);
+ disable_irq_wake(onkey->irq_rising);
+ }
+ return 0;
+}
+
+#endif
+
+static SIMPLE_DEV_PM_OPS(stpmu1_onkey_pm,
+ stpmu1_onkey_suspend,
+ stpmu1_onkey_resume);
+
+static const struct of_device_id of_stpmu1_onkey_match[] = {
+ { .compatible = "st,stpmu1-onkey" },
+ { },
+};
+
+MODULE_DEVICE_TABLE(of, of_stpmu1_onkey_match);
+
+static struct platform_driver stpmu1_onkey_driver = {
+ .probe = stpmu1_onkey_probe,
+ .remove = stpmu1_onkey_remove,
+ .driver = {
+ .name = "stpmu1_onkey",
+ .of_match_table = of_match_ptr(of_stpmu1_onkey_match),
+ .pm = &stpmu1_onkey_pm,
+ },
+};
+module_platform_driver(stpmu1_onkey_driver);
+
+MODULE_DESCRIPTION("Onkey driver for STPMU1");
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("philippe.peurichard@xxxxxx>");
--
1.9.1
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