Commit e795bf72 authored by Matti Vaittinen's avatar Matti Vaittinen Committed by Lee Jones
Browse files

mfd: bd71828: Add power-key support 



Use gpio_keys to send power input-event to user-space when power
button (short) press is detected.

Signed-off-by: default avatarMatti Vaittinen <matti.vaittinen@fi.rohmeurope.com>
Signed-off-by: default avatarLee Jones <lee.jones@linaro.org>
parent 1c743ad5

drivers/mfd/rohm-bd71828.c

+26 −0
Original line number Diff line number Diff line
@@ -4,7 +4,9 @@ 
//

// ROHM BD71828 PMIC driver



#include <linux/gpio_keys.h>

#include <linux/i2c.h>

#include <linux/input.h>

#include <linux/interrupt.h>

#include <linux/ioport.h>

#include <linux/irq.h>
@@ -15,6 +17,18 @@ 
#include <linux/regmap.h>

#include <linux/types.h>



static struct gpio_keys_button button = {

	.code = KEY_POWER,

	.gpio = -1,

	.type = EV_KEY,

};



static struct gpio_keys_platform_data bd71828_powerkey_data = {

	.buttons = &button,

	.nbuttons = 1,

	.name = "bd71828-pwrkey",

};



static const struct resource rtc_irqs[] = {

	DEFINE_RES_IRQ_NAMED(BD71828_INT_RTC0, "bd71828-rtc-alm-0"),

	DEFINE_RES_IRQ_NAMED(BD71828_INT_RTC1, "bd71828-rtc-alm-1"),
@@ -35,6 +49,10 @@ static struct mfd_cell bd71828_mfd_cells[] = { 
		.name = "bd71828-rtc",

		.resources = rtc_irqs,

		.num_resources = ARRAY_SIZE(rtc_irqs),

	}, {

		.name = "gpio-keys",

		.platform_data = &bd71828_powerkey_data,

		.pdata_size = sizeof(bd71828_powerkey_data),

	},

};
@@ -288,6 +306,14 @@ static int bd71828_i2c_probe(struct i2c_client *i2c) 
	dev_dbg(&i2c->dev, "Registered %d IRQs for chip\n",

		bd71828_irq_chip.num_irqs);



	ret = regmap_irq_get_virq(irq_data, BD71828_INT_SHORTPUSH);

	if (ret < 0) {

		dev_err(&i2c->dev, "Failed to get the power-key IRQ\n");

		return ret;

	}



	button.irq = ret;



	ret = devm_mfd_add_devices(&i2c->dev, PLATFORM_DEVID_AUTO,

				   bd71828_mfd_cells,

				   ARRAY_SIZE(bd71828_mfd_cells), NULL, 0,