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Commit e5c238c3 authored by Mattias Wallin's avatar Mattias Wallin Committed by Samuel Ortiz
Browse files

mfd: ab8500-core switch off status added 



This patch adds a sysfs file with the ab8500 switch off status.
The switch off status contains information of what caused the ab8500
chip to power off. A print during boot is also added.

Signed-off-by: default avatarMattias Wallin <mattias.wallin@stericsson.com>
Acked-by: default avatarLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: default avatarSamuel Ortiz <sameo@linux.intel.com>
parent adceed62

drivers/mfd/ab8500-core.c

+47 −0
Original line number Original line Diff line number Diff line
@@ -90,6 +90,7 @@ 
#define AB8500_IT_MASK24_REG		0x57

#define AB8500_IT_MASK24_REG		0x57





#define AB8500_REV_REG			0x80

#define AB8500_REV_REG			0x80

#define AB8500_SWITCH_OFF_STATUS	0x00





/*

/*

 * Map interrupt numbers to the LATCH and MASK register offsets, Interrupt

 * Map interrupt numbers to the LATCH and MASK register offsets, Interrupt
@@ -652,10 +653,38 @@ static ssize_t show_chip_id(struct device *dev, 
	return sprintf(buf, "%#x\n", ab8500 ? ab8500->chip_id : -EINVAL);

	return sprintf(buf, "%#x\n", ab8500 ? ab8500->chip_id : -EINVAL);

}

}





/*

 * ab8500 has switched off due to (SWITCH_OFF_STATUS):

 * 0x01 Swoff bit programming

 * 0x02 Thermal protection activation

 * 0x04 Vbat lower then BattOk falling threshold

 * 0x08 Watchdog expired

 * 0x10 Non presence of 32kHz clock

 * 0x20 Battery level lower than power on reset threshold

 * 0x40 Power on key 1 pressed longer than 10 seconds

 * 0x80 DB8500 thermal shutdown

 */

static ssize_t show_switch_off_status(struct device *dev,

				struct device_attribute *attr, char *buf)

{

	int ret;

	u8 value;

	struct ab8500 *ab8500;



	ab8500 = dev_get_drvdata(dev);

	ret = get_register_interruptible(ab8500, AB8500_RTC,

		AB8500_SWITCH_OFF_STATUS, &value);

	if (ret < 0)

		return ret;

	return sprintf(buf, "%#x\n", value);

}



static DEVICE_ATTR(chip_id, S_IRUGO, show_chip_id, NULL);

static DEVICE_ATTR(chip_id, S_IRUGO, show_chip_id, NULL);

static DEVICE_ATTR(switch_off_status, S_IRUGO, show_switch_off_status, NULL);





static struct attribute *ab8500_sysfs_entries[] = {

static struct attribute *ab8500_sysfs_entries[] = {

	&dev_attr_chip_id.attr,

	&dev_attr_chip_id.attr,

	&dev_attr_switch_off_status.attr,

	NULL,

	NULL,

};

};
@@ -697,6 +726,24 @@ int __devinit ab8500_init(struct ab8500 *ab8500) 
	}

	}

	ab8500->chip_id = value;

	ab8500->chip_id = value;





	/*

	 * ab8500 has switched off due to (SWITCH_OFF_STATUS):

	 * 0x01 Swoff bit programming

	 * 0x02 Thermal protection activation

	 * 0x04 Vbat lower then BattOk falling threshold

	 * 0x08 Watchdog expired

	 * 0x10 Non presence of 32kHz clock

	 * 0x20 Battery level lower than power on reset threshold

	 * 0x40 Power on key 1 pressed longer than 10 seconds

	 * 0x80 DB8500 thermal shutdown

	 */



	ret = get_register_interruptible(ab8500, AB8500_RTC,

		AB8500_SWITCH_OFF_STATUS, &value);

	if (ret < 0)

		return ret;

	dev_info(ab8500->dev, "switch off status: %#x", value);



	if (plat && plat->init)

	if (plat && plat->init)

		plat->init(ab8500);

		plat->init(ab8500);