| Message ID | 20221121065144.3667658-3-ping.bai@nxp.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Add nxp bbnsm module support | expand |
Hi Jacky, On Mon, Nov 21, 2022 at 02:51:42PM +0800, Jacky Bai wrote: > The ON/OFF logic inside the BBNSM allows for connecting directly > into a PMIC or other voltage regulator device. The module has an > button input signal and a wakeup request input signal. It also > has two interrupts (set_pwr_off_irq and set_pwr_on_irq) and an > active-low PMIC enable (pmic_en_b) output. > > Add the power key support for the ON/OFF button function found in > BBNSM module. > > Signed-off-by: Jacky Bai <ping.bai@nxp.com> > Reviewed-by: Peng Fan <peng.fan@nxp.com> > --- > drivers/input/keyboard/Kconfig | 11 ++ > drivers/input/keyboard/Makefile | 1 + > drivers/input/keyboard/bbnsm_pwrkey.c | 196 ++++++++++++++++++++++++++ > 3 files changed, 208 insertions(+) > create mode 100644 drivers/input/keyboard/bbnsm_pwrkey.c > > diff --git a/drivers/input/keyboard/Kconfig b/drivers/input/keyboard/Kconfig > index 00292118b79b..8efcd95492b3 100644 > --- a/drivers/input/keyboard/Kconfig > +++ b/drivers/input/keyboard/Kconfig > @@ -456,6 +456,17 @@ config KEYBOARD_SNVS_PWRKEY > To compile this driver as a module, choose M here; the > module will be called snvs_pwrkey. > > +config KEYBOARD_BBNSM_PWRKEY > + tristate "NXP BBNSM Power Key Driver" > + depends on ARCH_MXC || COMPILE_TEST > + depends on OF > + help > + This is the bbnsm powerkey driver for the NXP i.MX application > + processors. > + > + To compile this driver as a module, choose M here; the > + module will be called bbnsm_pwrkey. > + > config KEYBOARD_IMX > tristate "IMX keypad support" > depends on ARCH_MXC || COMPILE_TEST > diff --git a/drivers/input/keyboard/Makefile b/drivers/input/keyboard/Makefile > index 5f67196bb2c1..0bc101e004ae 100644 > --- a/drivers/input/keyboard/Makefile > +++ b/drivers/input/keyboard/Makefile > @@ -62,6 +62,7 @@ obj-$(CONFIG_KEYBOARD_QT2160) += qt2160.o > obj-$(CONFIG_KEYBOARD_SAMSUNG) += samsung-keypad.o > obj-$(CONFIG_KEYBOARD_SH_KEYSC) += sh_keysc.o > obj-$(CONFIG_KEYBOARD_SNVS_PWRKEY) += snvs_pwrkey.o > +obj-$(CONFIG_KEYBOARD_BBNSM_PWRKEY) += bbnsm_pwrkey.o > obj-$(CONFIG_KEYBOARD_SPEAR) += spear-keyboard.o > obj-$(CONFIG_KEYBOARD_STMPE) += stmpe-keypad.o > obj-$(CONFIG_KEYBOARD_STOWAWAY) += stowaway.o > diff --git a/drivers/input/keyboard/bbnsm_pwrkey.c b/drivers/input/keyboard/bbnsm_pwrkey.c > new file mode 100644 > index 000000000000..288ee6844000 > --- /dev/null > +++ b/drivers/input/keyboard/bbnsm_pwrkey.c > @@ -0,0 +1,196 @@ > +// SPDX-License-Identifier: GPL-2.0+ > +// > +// Copyright 2022 NXP. > + > +#include <linux/device.h> > +#include <linux/err.h> > +#include <linux/init.h> > +#include <linux/input.h> > +#include <linux/interrupt.h> > +#include <linux/io.h> > +#include <linux/jiffies.h> > +#include <linux/kernel.h> > +#include <linux/module.h> > +#include <linux/of.h> > +#include <linux/of_address.h> > +#include <linux/platform_device.h> > +#include <linux/pm_wakeirq.h> > +#include <linux/mfd/syscon.h> > +#include <linux/regmap.h> > + > +#define BBNSM_CTRL 0x8 > +#define BBNSM_INT_EN 0x10 > +#define BBNSM_EVENTS 0x14 > +#define BBNSM_PAD_CTRL 0x24 > + > +#define BBNSM_BTN_PRESSED BIT(7) > +#define BBNSM_PWR_ON BIT(6) > +#define BBNSM_BTN_OFF BIT(5) > +#define BBNSM_EMG_OFF BIT(4) > +#define BBNSM_PWRKEY_EVENTS (BBNSM_PWR_ON | BBNSM_BTN_OFF | BBNSM_EMG_OFF) > +#define BBNSM_DP_EN BIT(24) > + > +#define DEBOUNCE_TIME 30 > +#define REPEAT_INTERVAL 60 > + > +struct bbnsm_pwrkey { > + struct regmap *regmap; > + int irq; > + int keycode; > + int keystate; /* 1:pressed */ > + struct timer_list check_timer; > + struct input_dev *input; > +}; > + > +static void bbnsm_pwrkey_check_for_events(struct timer_list *t) > +{ > + struct bbnsm_pwrkey *bbnsm = from_timer(bbnsm, t, check_timer); > + struct input_dev *input = bbnsm->input; > + u32 state; > + > + regmap_read(bbnsm->regmap, BBNSM_EVENTS, &state); Can this fail? > + > + state = state & BBNSM_BTN_PRESSED ? 1 : 0; > + > + /* only report new event if status changed */ > + if (state ^ bbnsm->keystate) { > + bbnsm->keystate = state; > + input_event(input, EV_KEY, bbnsm->keycode, state); > + input_sync(input); > + pm_relax(bbnsm->input->dev.parent); > + } > + > + /* repeat check if pressed long */ > + if (state) { > + mod_timer(&bbnsm->check_timer, > + jiffies + msecs_to_jiffies(REPEAT_INTERVAL)); > + } So interrupt is only generated once when key is pressed, but not on release? > +} > + > +static irqreturn_t bbnsm_pwrkey_interrupt(int irq, void *dev_id) > +{ > + struct platform_device *pdev = dev_id; > + struct bbnsm_pwrkey *bbnsm = platform_get_drvdata(pdev); > + struct input_dev *input = bbnsm->input; > + u32 event; > + > + regmap_read(bbnsm->regmap, BBNSM_EVENTS, &event); > + if (event & BBNSM_BTN_OFF) > + mod_timer(&bbnsm->check_timer, jiffies + msecs_to_jiffies(DEBOUNCE_TIME)); > + else > + return IRQ_NONE; > + > + pm_wakeup_event(input->dev.parent, 0); > + > + /* clear PWR OFF */ > + regmap_write(bbnsm->regmap, BBNSM_EVENTS, BBNSM_BTN_OFF); > + > + return IRQ_HANDLED; > +} > + > +static void bbnsm_pwrkey_act(void *pdata) > +{ > + struct bbnsm_pwrkey *bbnsm = pdata; > + > + del_timer_sync(&bbnsm->check_timer); > +} > + > +static int bbnsm_pwrkey_probe(struct platform_device *pdev) > +{ > + struct bbnsm_pwrkey *bbnsm; > + struct input_dev *input; > + struct device_node *np = pdev->dev.of_node; > + int error; > + > + bbnsm = devm_kzalloc(&pdev->dev, sizeof(*bbnsm), GFP_KERNEL); > + if (!bbnsm) > + return -ENOMEM; > + > + bbnsm->regmap = syscon_regmap_lookup_by_phandle(pdev->dev.of_node, "regmap"); > + if (IS_ERR(bbnsm->regmap)) { > + dev_err(&pdev->dev, "bbnsm pwerkey get regmap failed\n"); > + return PTR_ERR(bbnsm->regmap); > + } > + > + if (of_property_read_u32(np, "linux,code", &bbnsm->keycode)) { Please use device_property_read_u32() here. > + bbnsm->keycode = KEY_POWER; > + dev_warn(&pdev->dev, "KEY_POWER without setting in dts\n"); > + } > + > + bbnsm->irq = platform_get_irq(pdev, 0); > + if (bbnsm->irq < 0) > + return -EINVAL; > + > + /* config the BBNSM power related register */ > + regmap_update_bits(bbnsm->regmap, BBNSM_CTRL, BBNSM_DP_EN, BBNSM_DP_EN); > + > + /* clear the unexpected interrupt before driver ready */ > + regmap_write_bits(bbnsm->regmap, BBNSM_EVENTS, BBNSM_PWRKEY_EVENTS, BBNSM_PWRKEY_EVENTS); > + > + timer_setup(&bbnsm->check_timer, bbnsm_pwrkey_check_for_events, 0); > + > + input = devm_input_allocate_device(&pdev->dev); > + if (!input) { > + dev_err(&pdev->dev, "failed to allocate the input device\n"); > + error = -ENOMEM; > + goto error_probe; Please return directly here and below, since there is not explicit cleanup. > + } > + > + input->name = pdev->name; > + input->phys = "bbnsm-pwrkey/input0"; > + input->id.bustype = BUS_HOST; > + > + input_set_capability(input, EV_KEY, bbnsm->keycode); > + > + /* input customer action to cancel release timer */ > + error = devm_add_action(&pdev->dev, bbnsm_pwrkey_act, bbnsm); > + if (error) { > + dev_err(&pdev->dev, "failed to register remove action\n"); > + goto error_probe; > + } > + > + bbnsm->input = input; > + platform_set_drvdata(pdev, bbnsm); > + > + error = devm_request_irq(&pdev->dev, bbnsm->irq, bbnsm_pwrkey_interrupt, > + IRQF_SHARED, pdev->name, pdev); > + if (error) { > + dev_err(&pdev->dev, "interrupt not available.\n"); > + goto error_probe; > + } > + > + error = input_register_device(input); > + if (error < 0) { > + dev_err(&pdev->dev, "failed to register input device\n"); > + goto error_probe; > + } > + > + device_init_wakeup(&pdev->dev, true); > + error = dev_pm_set_wake_irq(&pdev->dev, bbnsm->irq); > + if (error) > + dev_err(&pdev->dev, "irq wake enable failed.\n"); > + > + return 0; > + > +error_probe: > + return error; > +} > + > +static const struct of_device_id bbnsm_pwrkey_ids[] = { > + { .compatible = "nxp,bbnsm-pwrkey" }, > + { /* sentinel */ } > +}; > +MODULE_DEVICE_TABLE(of, bbnsm_pwrkey_ids); > + > +static struct platform_driver bbnsm_pwrkey_driver = { > + .driver = { > + .name = "bbnsm_pwrkey", > + .of_match_table = bbnsm_pwrkey_ids, > + }, > + .probe = bbnsm_pwrkey_probe, > +}; > +module_platform_driver(bbnsm_pwrkey_driver); > + > +MODULE_AUTHOR("Jacky Bai <ping.bai@nxp.com>"); > +MODULE_DESCRIPTION("NXP bbnsm power key Driver"); > +MODULE_LICENSE("GPL"); > -- > 2.37.1 > Thanks.
> Subject: Re: [PATCH 2/4] input: bbnsm_pwrkey: Add bbnsm power key > support > > Hi Jacky, > > On Mon, Nov 21, 2022 at 02:51:42PM +0800, Jacky Bai wrote: > > The ON/OFF logic inside the BBNSM allows for connecting directly into > > a PMIC or other voltage regulator device. The module has an button > > input signal and a wakeup request input signal. It also has two > > interrupts (set_pwr_off_irq and set_pwr_on_irq) and an active-low PMIC > > enable (pmic_en_b) output. > > > > Add the power key support for the ON/OFF button function found in > > BBNSM module. > > > > Signed-off-by: Jacky Bai <ping.bai@nxp.com> > > Reviewed-by: Peng Fan <peng.fan@nxp.com> > > --- > > drivers/input/keyboard/Kconfig | 11 ++ > > drivers/input/keyboard/Makefile | 1 + > > drivers/input/keyboard/bbnsm_pwrkey.c | 196 > > ++++++++++++++++++++++++++ > > 3 files changed, 208 insertions(+) > > create mode 100644 drivers/input/keyboard/bbnsm_pwrkey.c > > > > diff --git a/drivers/input/keyboard/Kconfig > > b/drivers/input/keyboard/Kconfig index 00292118b79b..8efcd95492b3 > > 100644 > > --- a/drivers/input/keyboard/Kconfig > > +++ b/drivers/input/keyboard/Kconfig > > @@ -456,6 +456,17 @@ config KEYBOARD_SNVS_PWRKEY > > To compile this driver as a module, choose M here; the > > module will be called snvs_pwrkey. > > > > +config KEYBOARD_BBNSM_PWRKEY > > + tristate "NXP BBNSM Power Key Driver" > > + depends on ARCH_MXC || COMPILE_TEST > > + depends on OF > > + help > > + This is the bbnsm powerkey driver for the NXP i.MX application > > + processors. > > + > > + To compile this driver as a module, choose M here; the > > + module will be called bbnsm_pwrkey. > > + > > config KEYBOARD_IMX > > tristate "IMX keypad support" > > depends on ARCH_MXC || COMPILE_TEST > > diff --git a/drivers/input/keyboard/Makefile > > b/drivers/input/keyboard/Makefile index 5f67196bb2c1..0bc101e004ae > > 100644 > > --- a/drivers/input/keyboard/Makefile > > +++ b/drivers/input/keyboard/Makefile > > @@ -62,6 +62,7 @@ obj-$(CONFIG_KEYBOARD_QT2160) += > qt2160.o > > obj-$(CONFIG_KEYBOARD_SAMSUNG) += samsung-keypad.o > > obj-$(CONFIG_KEYBOARD_SH_KEYSC) += sh_keysc.o > > obj-$(CONFIG_KEYBOARD_SNVS_PWRKEY) += snvs_pwrkey.o > > +obj-$(CONFIG_KEYBOARD_BBNSM_PWRKEY) += bbnsm_pwrkey.o > > obj-$(CONFIG_KEYBOARD_SPEAR) += spear-keyboard.o > > obj-$(CONFIG_KEYBOARD_STMPE) += stmpe-keypad.o > > obj-$(CONFIG_KEYBOARD_STOWAWAY) += stowaway.o > > diff --git a/drivers/input/keyboard/bbnsm_pwrkey.c > > b/drivers/input/keyboard/bbnsm_pwrkey.c > > new file mode 100644 > > index 000000000000..288ee6844000 > > --- /dev/null > > +++ b/drivers/input/keyboard/bbnsm_pwrkey.c ... > > + > > +static void bbnsm_pwrkey_check_for_events(struct timer_list *t) { > > + struct bbnsm_pwrkey *bbnsm = from_timer(bbnsm, t, check_timer); > > + struct input_dev *input = bbnsm->input; > > + u32 state; > > + > > + regmap_read(bbnsm->regmap, BBNSM_EVENTS, &state); > > Can this fail? Should no chance to fail. Any more tips? > > > + > > + state = state & BBNSM_BTN_PRESSED ? 1 : 0; > > + > > + /* only report new event if status changed */ > > + if (state ^ bbnsm->keystate) { > > + bbnsm->keystate = state; > > + input_event(input, EV_KEY, bbnsm->keycode, state); > > + input_sync(input); > > + pm_relax(bbnsm->input->dev.parent); > > + } > > + > > + /* repeat check if pressed long */ > > + if (state) { > > + mod_timer(&bbnsm->check_timer, > > + jiffies + msecs_to_jiffies(REPEAT_INTERVAL)); > > + } > > So interrupt is only generated once when key is pressed, but not on release? > Yes, at lease from my test, this interrupt can only be triggered when pressed. > > +} > > + > > +static irqreturn_t bbnsm_pwrkey_interrupt(int irq, void *dev_id) { > > + struct platform_device *pdev = dev_id; > > + struct bbnsm_pwrkey *bbnsm = platform_get_drvdata(pdev); > > + struct input_dev *input = bbnsm->input; > > + u32 event; > > + > > + regmap_read(bbnsm->regmap, BBNSM_EVENTS, &event); > > + if (event & BBNSM_BTN_OFF) > > + mod_timer(&bbnsm->check_timer, jiffies + > msecs_to_jiffies(DEBOUNCE_TIME)); > > + else > > + return IRQ_NONE; > > + > > + pm_wakeup_event(input->dev.parent, 0); > > + > > + /* clear PWR OFF */ > > + regmap_write(bbnsm->regmap, BBNSM_EVENTS, BBNSM_BTN_OFF); > > + > > + return IRQ_HANDLED; > > +} > > + > > +static void bbnsm_pwrkey_act(void *pdata) { > > + struct bbnsm_pwrkey *bbnsm = pdata; > > + > > + del_timer_sync(&bbnsm->check_timer); > > +} > > + > > +static int bbnsm_pwrkey_probe(struct platform_device *pdev) { > > + struct bbnsm_pwrkey *bbnsm; > > + struct input_dev *input; > > + struct device_node *np = pdev->dev.of_node; > > + int error; > > + > > + bbnsm = devm_kzalloc(&pdev->dev, sizeof(*bbnsm), GFP_KERNEL); > > + if (!bbnsm) > > + return -ENOMEM; > > + > > + bbnsm->regmap = > syscon_regmap_lookup_by_phandle(pdev->dev.of_node, "regmap"); > > + if (IS_ERR(bbnsm->regmap)) { > > + dev_err(&pdev->dev, "bbnsm pwerkey get regmap failed\n"); > > + return PTR_ERR(bbnsm->regmap); > > + } > > + > > + if (of_property_read_u32(np, "linux,code", &bbnsm->keycode)) { > > Please use device_property_read_u32() here. Ok, will fix in V2. > > > + bbnsm->keycode = KEY_POWER; > > + dev_warn(&pdev->dev, "KEY_POWER without setting in dts\n"); > > + } > > + > > + bbnsm->irq = platform_get_irq(pdev, 0); > > + if (bbnsm->irq < 0) > > + return -EINVAL; > > + > > + /* config the BBNSM power related register */ > > + regmap_update_bits(bbnsm->regmap, BBNSM_CTRL, BBNSM_DP_EN, > > +BBNSM_DP_EN); > > + > > + /* clear the unexpected interrupt before driver ready */ > > + regmap_write_bits(bbnsm->regmap, BBNSM_EVENTS, > BBNSM_PWRKEY_EVENTS, > > +BBNSM_PWRKEY_EVENTS); > > + > > + timer_setup(&bbnsm->check_timer, bbnsm_pwrkey_check_for_events, > 0); > > + > > + input = devm_input_allocate_device(&pdev->dev); > > + if (!input) { > > + dev_err(&pdev->dev, "failed to allocate the input device\n"); > > + error = -ENOMEM; > > + goto error_probe; > > Please return directly here and below, since there is not explicit cleanup. > Thx, will fix in V2. BR > > + } > > + > > + input->name = pdev->name; > > + input->phys = "bbnsm-pwrkey/input0"; > > + input->id.bustype = BUS_HOST; > > + > > + input_set_capability(input, EV_KEY, bbnsm->keycode); > > + > > + /* input customer action to cancel release timer */ > > + error = devm_add_action(&pdev->dev, bbnsm_pwrkey_act, bbnsm); > > + if (error) { > > + dev_err(&pdev->dev, "failed to register remove action\n"); > > + goto error_probe; > > + } > > + > > + bbnsm->input = input; > > + platform_set_drvdata(pdev, bbnsm); > > + > > + error = devm_request_irq(&pdev->dev, bbnsm->irq, > bbnsm_pwrkey_interrupt, > > + IRQF_SHARED, pdev->name, pdev); > > + if (error) { > > + dev_err(&pdev->dev, "interrupt not available.\n"); > > + goto error_probe; > > + } > > + > > + error = input_register_device(input); > > + if (error < 0) { > > + dev_err(&pdev->dev, "failed to register input device\n"); > > + goto error_probe; > > + } > > + > > + device_init_wakeup(&pdev->dev, true); > > + error = dev_pm_set_wake_irq(&pdev->dev, bbnsm->irq); > > + if (error) > > + dev_err(&pdev->dev, "irq wake enable failed.\n"); > > + > > + return 0; > > + > > +error_probe: > > + return error; > > +} > > + > > +static const struct of_device_id bbnsm_pwrkey_ids[] = { > > + { .compatible = "nxp,bbnsm-pwrkey" }, > > + { /* sentinel */ } > > +}; > > +MODULE_DEVICE_TABLE(of, bbnsm_pwrkey_ids); > > + > > +static struct platform_driver bbnsm_pwrkey_driver = { > > + .driver = { > > + .name = "bbnsm_pwrkey", > > + .of_match_table = bbnsm_pwrkey_ids, > > + }, > > + .probe = bbnsm_pwrkey_probe, > > +}; > > +module_platform_driver(bbnsm_pwrkey_driver); > > + > > +MODULE_AUTHOR("Jacky Bai <ping.bai@nxp.com>"); > > +MODULE_DESCRIPTION("NXP bbnsm power key Driver"); > > +MODULE_LICENSE("GPL"); > > -- > > 2.37.1 > > > > Thanks. > > -- > Dmitry
diff --git a/drivers/input/keyboard/Kconfig b/drivers/input/keyboard/Kconfig index 00292118b79b..8efcd95492b3 100644 --- a/drivers/input/keyboard/Kconfig +++ b/drivers/input/keyboard/Kconfig @@ -456,6 +456,17 @@ config KEYBOARD_SNVS_PWRKEY To compile this driver as a module, choose M here; the module will be called snvs_pwrkey. +config KEYBOARD_BBNSM_PWRKEY + tristate "NXP BBNSM Power Key Driver" + depends on ARCH_MXC || COMPILE_TEST + depends on OF + help + This is the bbnsm powerkey driver for the NXP i.MX application + processors. + + To compile this driver as a module, choose M here; the + module will be called bbnsm_pwrkey. + config KEYBOARD_IMX tristate "IMX keypad support" depends on ARCH_MXC || COMPILE_TEST diff --git a/drivers/input/keyboard/Makefile b/drivers/input/keyboard/Makefile index 5f67196bb2c1..0bc101e004ae 100644 --- a/drivers/input/keyboard/Makefile +++ b/drivers/input/keyboard/Makefile @@ -62,6 +62,7 @@ obj-$(CONFIG_KEYBOARD_QT2160) += qt2160.o obj-$(CONFIG_KEYBOARD_SAMSUNG) += samsung-keypad.o obj-$(CONFIG_KEYBOARD_SH_KEYSC) += sh_keysc.o obj-$(CONFIG_KEYBOARD_SNVS_PWRKEY) += snvs_pwrkey.o +obj-$(CONFIG_KEYBOARD_BBNSM_PWRKEY) += bbnsm_pwrkey.o obj-$(CONFIG_KEYBOARD_SPEAR) += spear-keyboard.o obj-$(CONFIG_KEYBOARD_STMPE) += stmpe-keypad.o obj-$(CONFIG_KEYBOARD_STOWAWAY) += stowaway.o diff --git a/drivers/input/keyboard/bbnsm_pwrkey.c b/drivers/input/keyboard/bbnsm_pwrkey.c new file mode 100644 index 000000000000..288ee6844000 --- /dev/null +++ b/drivers/input/keyboard/bbnsm_pwrkey.c @@ -0,0 +1,196 @@ +// SPDX-License-Identifier: GPL-2.0+ +// +// Copyright 2022 NXP. + +#include <linux/device.h> +#include <linux/err.h> +#include <linux/init.h> +#include <linux/input.h> +#include <linux/interrupt.h> +#include <linux/io.h> +#include <linux/jiffies.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/of_address.h> +#include <linux/platform_device.h> +#include <linux/pm_wakeirq.h> +#include <linux/mfd/syscon.h> +#include <linux/regmap.h> + +#define BBNSM_CTRL 0x8 +#define BBNSM_INT_EN 0x10 +#define BBNSM_EVENTS 0x14 +#define BBNSM_PAD_CTRL 0x24 + +#define BBNSM_BTN_PRESSED BIT(7) +#define BBNSM_PWR_ON BIT(6) +#define BBNSM_BTN_OFF BIT(5) +#define BBNSM_EMG_OFF BIT(4) +#define BBNSM_PWRKEY_EVENTS (BBNSM_PWR_ON | BBNSM_BTN_OFF | BBNSM_EMG_OFF) +#define BBNSM_DP_EN BIT(24) + +#define DEBOUNCE_TIME 30 +#define REPEAT_INTERVAL 60 + +struct bbnsm_pwrkey { + struct regmap *regmap; + int irq; + int keycode; + int keystate; /* 1:pressed */ + struct timer_list check_timer; + struct input_dev *input; +}; + +static void bbnsm_pwrkey_check_for_events(struct timer_list *t) +{ + struct bbnsm_pwrkey *bbnsm = from_timer(bbnsm, t, check_timer); + struct input_dev *input = bbnsm->input; + u32 state; + + regmap_read(bbnsm->regmap, BBNSM_EVENTS, &state); + + state = state & BBNSM_BTN_PRESSED ? 1 : 0; + + /* only report new event if status changed */ + if (state ^ bbnsm->keystate) { + bbnsm->keystate = state; + input_event(input, EV_KEY, bbnsm->keycode, state); + input_sync(input); + pm_relax(bbnsm->input->dev.parent); + } + + /* repeat check if pressed long */ + if (state) { + mod_timer(&bbnsm->check_timer, + jiffies + msecs_to_jiffies(REPEAT_INTERVAL)); + } +} + +static irqreturn_t bbnsm_pwrkey_interrupt(int irq, void *dev_id) +{ + struct platform_device *pdev = dev_id; + struct bbnsm_pwrkey *bbnsm = platform_get_drvdata(pdev); + struct input_dev *input = bbnsm->input; + u32 event; + + regmap_read(bbnsm->regmap, BBNSM_EVENTS, &event); + if (event & BBNSM_BTN_OFF) + mod_timer(&bbnsm->check_timer, jiffies + msecs_to_jiffies(DEBOUNCE_TIME)); + else + return IRQ_NONE; + + pm_wakeup_event(input->dev.parent, 0); + + /* clear PWR OFF */ + regmap_write(bbnsm->regmap, BBNSM_EVENTS, BBNSM_BTN_OFF); + + return IRQ_HANDLED; +} + +static void bbnsm_pwrkey_act(void *pdata) +{ + struct bbnsm_pwrkey *bbnsm = pdata; + + del_timer_sync(&bbnsm->check_timer); +} + +static int bbnsm_pwrkey_probe(struct platform_device *pdev) +{ + struct bbnsm_pwrkey *bbnsm; + struct input_dev *input; + struct device_node *np = pdev->dev.of_node; + int error; + + bbnsm = devm_kzalloc(&pdev->dev, sizeof(*bbnsm), GFP_KERNEL); + if (!bbnsm) + return -ENOMEM; + + bbnsm->regmap = syscon_regmap_lookup_by_phandle(pdev->dev.of_node, "regmap"); + if (IS_ERR(bbnsm->regmap)) { + dev_err(&pdev->dev, "bbnsm pwerkey get regmap failed\n"); + return PTR_ERR(bbnsm->regmap); + } + + if (of_property_read_u32(np, "linux,code", &bbnsm->keycode)) { + bbnsm->keycode = KEY_POWER; + dev_warn(&pdev->dev, "KEY_POWER without setting in dts\n"); + } + + bbnsm->irq = platform_get_irq(pdev, 0); + if (bbnsm->irq < 0) + return -EINVAL; + + /* config the BBNSM power related register */ + regmap_update_bits(bbnsm->regmap, BBNSM_CTRL, BBNSM_DP_EN, BBNSM_DP_EN); + + /* clear the unexpected interrupt before driver ready */ + regmap_write_bits(bbnsm->regmap, BBNSM_EVENTS, BBNSM_PWRKEY_EVENTS, BBNSM_PWRKEY_EVENTS); + + timer_setup(&bbnsm->check_timer, bbnsm_pwrkey_check_for_events, 0); + + input = devm_input_allocate_device(&pdev->dev); + if (!input) { + dev_err(&pdev->dev, "failed to allocate the input device\n"); + error = -ENOMEM; + goto error_probe; + } + + input->name = pdev->name; + input->phys = "bbnsm-pwrkey/input0"; + input->id.bustype = BUS_HOST; + + input_set_capability(input, EV_KEY, bbnsm->keycode); + + /* input customer action to cancel release timer */ + error = devm_add_action(&pdev->dev, bbnsm_pwrkey_act, bbnsm); + if (error) { + dev_err(&pdev->dev, "failed to register remove action\n"); + goto error_probe; + } + + bbnsm->input = input; + platform_set_drvdata(pdev, bbnsm); + + error = devm_request_irq(&pdev->dev, bbnsm->irq, bbnsm_pwrkey_interrupt, + IRQF_SHARED, pdev->name, pdev); + if (error) { + dev_err(&pdev->dev, "interrupt not available.\n"); + goto error_probe; + } + + error = input_register_device(input); + if (error < 0) { + dev_err(&pdev->dev, "failed to register input device\n"); + goto error_probe; + } + + device_init_wakeup(&pdev->dev, true); + error = dev_pm_set_wake_irq(&pdev->dev, bbnsm->irq); + if (error) + dev_err(&pdev->dev, "irq wake enable failed.\n"); + + return 0; + +error_probe: + return error; +} + +static const struct of_device_id bbnsm_pwrkey_ids[] = { + { .compatible = "nxp,bbnsm-pwrkey" }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, bbnsm_pwrkey_ids); + +static struct platform_driver bbnsm_pwrkey_driver = { + .driver = { + .name = "bbnsm_pwrkey", + .of_match_table = bbnsm_pwrkey_ids, + }, + .probe = bbnsm_pwrkey_probe, +}; +module_platform_driver(bbnsm_pwrkey_driver); + +MODULE_AUTHOR("Jacky Bai <ping.bai@nxp.com>"); +MODULE_DESCRIPTION("NXP bbnsm power key Driver"); +MODULE_LICENSE("GPL");