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From: Pascal PAILLET-LME
To: "dmitry.torokhov@gmail.com" ,
"robh+dt@kernel.org" ,
"mark.rutland@arm.com"
,
"lee.jones@linaro.org" ,
"lgirdwood@gmail.com" ,
"broonie@kernel.org"
,
"wim@linux-watchdog.org" ,
"linux@roeck-us.net" ,
"linux-input@vger.kernel.org"
,
"devicetree@vger.kernel.org"
,
"linux-kernel@vger.kernel.org"
,
"linux-watchdog@vger.kernel.org"
,
"benjamin.gaignard@linaro.org"
,
"eballetbo@gmail.com"
CC: Pascal PAILLET-LME
Subject: [PATCH v3 6/8] input: stpmic1: add stpmic1 onkey driver
Date: Mon, 8 Oct 2018 16:29:41 +0000
Message-ID: <1539016176-4072-7-git-send-email-p.paillet@st.com>
References: <1539016176-4072-1-git-send-email-p.paillet@st.com>
In-Reply-To: <1539016176-4072-1-git-send-email-p.paillet@st.com>
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From: pascal paillet
The stpmic1 pmic is able to manage an onkey button. This driver exposes
the stpmic1 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
---
changes in v3:
* Rename struct stpmic1_dev by struct stpmic1.
* Replace of_property_ by device_property.
* Remove log in IRQ handler.
* Add email address in MODULE_AUTHOR.
drivers/input/misc/Kconfig | 11 ++
drivers/input/misc/Makefile | 2 +
drivers/input/misc/stpmic1_onkey.c | 248 +++++++++++++++++++++++++++++++++=
++++
3 files changed, 261 insertions(+)
create mode 100644 drivers/input/misc/stpmic1_onkey.c
diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig
index ca59a2b..279fb02 100644
--- a/drivers/input/misc/Kconfig
+++ b/drivers/input/misc/Kconfig
@@ -851,4 +851,15 @@ config INPUT_SC27XX_VIBRA
To compile this driver as a module, choose M here. The module will
be called sc27xx_vibra.
=20
+config INPUT_STPMIC1_ONKEY
+ tristate "STPMIC1 PMIC Onkey support"
+ depends on MFD_STPMIC1
+ help
+ Say Y to enable support of onkey embedded into STPMIC1 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 stpmic1_onkey.
+
endif
diff --git a/drivers/input/misc/Makefile b/drivers/input/misc/Makefile
index 9d0f9d1..1b44202 100644
--- a/drivers/input/misc/Makefile
+++ b/drivers/input/misc/Makefile
@@ -71,6 +71,7 @@ obj-$(CONFIG_INPUT_SGI_BTNS) +=3D sgi_btns.o
obj-$(CONFIG_INPUT_SIRFSOC_ONKEY) +=3D sirfsoc-onkey.o
obj-$(CONFIG_INPUT_SOC_BUTTON_ARRAY) +=3D soc_button_array.o
obj-$(CONFIG_INPUT_SPARCSPKR) +=3D sparcspkr.o
+obj-$(CONFIG_INPUT_STPMIC1_ONKEY) +=3D stpmic1_onkey.o
obj-$(CONFIG_INPUT_TPS65218_PWRBUTTON) +=3D tps65218-pwrbutton.o
obj-$(CONFIG_INPUT_TWL4030_PWRBUTTON) +=3D twl4030-pwrbutton.o
obj-$(CONFIG_INPUT_TWL4030_VIBRA) +=3D twl4030-vibra.o
@@ -81,3 +82,4 @@ obj-$(CONFIG_INPUT_WM831X_ON) +=3D wm831x-on.o
obj-$(CONFIG_INPUT_XEN_KBDDEV_FRONTEND) +=3D xen-kbdfront.o
obj-$(CONFIG_INPUT_YEALINK) +=3D yealink.o
obj-$(CONFIG_INPUT_IDEAPAD_SLIDEBAR) +=3D ideapad_slidebar.o
+
diff --git a/drivers/input/misc/stpmic1_onkey.c b/drivers/input/misc/stpmic=
1_onkey.c
new file mode 100644
index 0000000..871a087
--- /dev/null
+++ b/drivers/input/misc/stpmic1_onkey.c
@@ -0,0 +1,248 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (C) STMicroelectronics 2018
+// Author: Pascal Paillet for STMicroelectronics.
+
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+
+/**
+ * struct stpmic1_onkey - OnKey data
+ * @pmic: pointer to STPMIC1 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 stpmic1_onkey {
+ struct stpmic1 *pmic;
+ struct input_dev *input_dev;
+ int irq_falling;
+ int irq_rising;
+};
+
+/**
+ * struct pmic_onkey_config - configuration of pmic PONKEYn
+ * @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)
+ * @power_off_time_sec: value for long press h/w shutdown event
+ */
+struct pmic_onkey_config {
+ bool cc_flag_clear;
+ u8 onkey_pullup_val;
+ u8 power_off_time_sec;
+};
+
+static irqreturn_t onkey_falling_irq(int irq, void *ponkey)
+{
+ struct stpmic1_onkey *onkey =3D ponkey;
+ struct input_dev *input_dev =3D onkey->input_dev;
+
+ input_report_key(input_dev, KEY_POWER, 1);
+ pm_wakeup_event(input_dev->dev.parent, 0);
+ input_sync(input_dev);
+
+ return IRQ_HANDLED;
+}
+
+static irqreturn_t onkey_rising_irq(int irq, void *ponkey)
+{
+ struct stpmic1_onkey *onkey =3D ponkey;
+ struct input_dev *input_dev =3D onkey->input_dev;
+
+ input_report_key(input_dev, KEY_POWER, 0);
+ pm_wakeup_event(input_dev->dev.parent, 0);
+ input_sync(input_dev);
+
+ return IRQ_HANDLED;
+}
+
+static int stpmic1_onkey_dt_params(struct platform_device *pdev,
+ struct stpmic1_onkey *onkey,
+ struct pmic_onkey_config *config)
+{
+ struct device *dev =3D &pdev->dev;
+ u32 val;
+
+ onkey->irq_falling =3D platform_get_irq_byname(pdev, "onkey-falling");
+ if (onkey->irq_falling < 0) {
+ dev_err(dev, "failed: request IRQ onkey-falling %d\n",
+ onkey->irq_falling);
+ return onkey->irq_falling;
+ }
+
+ onkey->irq_rising =3D platform_get_irq_byname(pdev, "onkey-rising");
+ if (onkey->irq_rising < 0) {
+ dev_err(dev, "failed: request IRQ onkey-rising %d\n",
+ onkey->irq_rising);
+ return onkey->irq_rising;
+ }
+
+ if (!device_property_read_u32(dev, "power-off-time-sec", &val)) {
+ if ((val > 0) && (val <=3D 16)) {
+ config->power_off_time_sec =3D val;
+ } else {
+ dev_err(dev, "power-off-time-sec out of range\n");
+ return -EINVAL;
+ }
+ }
+
+ if (device_property_present(dev, "st,onkey-clear-cc-flag"))
+ config->cc_flag_clear =3D true;
+
+ if (device_property_present(dev, "st,onkey-pu-inactive"))
+ config->onkey_pullup_val =3D PONKEY_PU_ACTIVE;
+
+ dev_dbg(dev, "onkey-switch-off duration=3D%d seconds\n",
+ config->power_off_time_sec);
+
+ return 0;
+}
+
+static int stpmic1_onkey_probe(struct platform_device *pdev)
+{
+ struct stpmic1 *pmic =3D dev_get_drvdata(pdev->dev.parent);
+ struct device *dev =3D &pdev->dev;
+ struct input_dev *input_dev;
+ struct stpmic1_onkey *onkey;
+ struct pmic_onkey_config config;
+ unsigned int val =3D 0;
+ int error;
+
+ onkey =3D devm_kzalloc(dev, sizeof(*onkey), GFP_KERNEL);
+ if (!onkey)
+ return -ENOMEM;
+
+ memset(&config, 0, sizeof(struct pmic_onkey_config));
+ error =3D stpmic1_onkey_dt_params(pdev, onkey, &config);
+ if (error)
+ return error;
+
+ input_dev =3D devm_input_allocate_device(dev);
+ if (!input_dev) {
+ dev_err(dev, "Can't allocate Pwr Onkey Input Device\n");
+ return -ENOMEM;
+ }
+
+ input_dev->name =3D "pmic_onkey";
+ input_dev->phys =3D "pmic_onkey/input0";
+
+ input_set_capability(input_dev, EV_KEY, KEY_POWER);
+
+ /* Setup Power Onkey Hardware parameters (long key press)*/
+ if (config.power_off_time_sec > 0) {
+ val |=3D PONKEY_PWR_OFF;
+ val |=3D ((16 - config.power_off_time_sec) &
+ PONKEY_TURNOFF_TIMER_MASK);
+ }
+ if (config.cc_flag_clear)
+ val |=3D PONKEY_CC_FLAG_CLEAR;
+ error =3D regmap_update_bits(pmic->regmap, PKEY_TURNOFF_CR,
+ PONKEY_TURNOFF_MASK, val);
+ if (error) {
+ dev_err(dev, "LONG_PRESS_KEY_UPDATE failed: %d\n", error);
+ return error;
+ }
+
+ error =3D regmap_update_bits(pmic->regmap, PADS_PULL_CR,
+ PONKEY_PU_ACTIVE,
+ config.onkey_pullup_val);
+ if (error) {
+ dev_err(dev, "ONKEY Pads configuration failed: %d\n", error);
+ return error;
+ }
+
+ onkey->pmic =3D pmic;
+ onkey->input_dev =3D input_dev;
+
+ /* interrupt is nested in a thread */
+ error =3D devm_request_threaded_irq(dev, onkey->irq_falling, NULL,
+ onkey_falling_irq, IRQF_ONESHOT,
+ dev_name(dev), onkey);
+ if (error) {
+ dev_err(dev, "Can't get IRQ Onkey Falling: %d\n", error);
+ return error;
+ }
+
+ error =3D devm_request_threaded_irq(dev, onkey->irq_rising, NULL,
+ onkey_rising_irq, IRQF_ONESHOT,
+ dev_name(dev), onkey);
+ if (error) {
+ dev_err(dev, "Can't get IRQ Onkey Rising: %d\n", error);
+ return error;
+ }
+
+ error =3D input_register_device(input_dev);
+ if (error) {
+ dev_err(dev, "Can't register power button: %d\n", error);
+ return error;
+ }
+
+ platform_set_drvdata(pdev, onkey);
+ device_init_wakeup(dev, true);
+
+ return 0;
+}
+
+static int stpmic1_onkey_remove(struct platform_device *pdev)
+{
+ struct stpmic1_onkey *onkey =3D platform_get_drvdata(pdev);
+
+ input_unregister_device(onkey->input_dev);
+ return 0;
+}
+
+static int __maybe_unused stpmic1_onkey_suspend(struct device *dev)
+{
+ struct platform_device *pdev =3D to_platform_device(dev);
+ struct stpmic1_onkey *onkey =3D platform_get_drvdata(pdev);
+
+ if (device_may_wakeup(dev)) {
+ enable_irq_wake(onkey->irq_falling);
+ enable_irq_wake(onkey->irq_rising);
+ }
+ return 0;
+}
+
+static int __maybe_unused stpmic1_onkey_resume(struct device *dev)
+{
+ struct platform_device *pdev =3D to_platform_device(dev);
+ struct stpmic1_onkey *onkey =3D platform_get_drvdata(pdev);
+
+ if (device_may_wakeup(dev)) {
+ disable_irq_wake(onkey->irq_falling);
+ disable_irq_wake(onkey->irq_rising);
+ }
+ return 0;
+}
+
+static SIMPLE_DEV_PM_OPS(stpmic1_onkey_pm,
+ stpmic1_onkey_suspend,
+ stpmic1_onkey_resume);
+
+static const struct of_device_id of_stpmic1_onkey_match[] =3D {
+ { .compatible =3D "st,stpmic1-onkey" },
+ { },
+};
+
+MODULE_DEVICE_TABLE(of, of_stpmic1_onkey_match);
+
+static struct platform_driver stpmic1_onkey_driver =3D {
+ .probe =3D stpmic1_onkey_probe,
+ .remove =3D stpmic1_onkey_remove,
+ .driver =3D {
+ .name =3D "stpmic1_onkey",
+ .of_match_table =3D of_match_ptr(of_stpmic1_onkey_match),
+ .pm =3D &stpmic1_onkey_pm,
+ },
+};
+module_platform_driver(stpmic1_onkey_driver);
+
+MODULE_DESCRIPTION("Onkey driver for STPMIC1");
+MODULE_AUTHOR("Pascal Paillet ");
+MODULE_LICENSE("GPL v2");
--=20
1.9.1