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: Mattias Wallin <mattias.wallin@stericsson.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
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@ -90,6 +90,7 @@
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#define AB8500_IT_MASK24_REG 0x57
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#define AB8500_IT_MASK24_REG 0x57
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#define AB8500_REV_REG 0x80
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#define AB8500_REV_REG 0x80
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#define AB8500_SWITCH_OFF_STATUS 0x00
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/*
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/*
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* Map interrupt numbers to the LATCH and MASK register offsets, Interrupt
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* Map interrupt numbers to the LATCH and MASK register offsets, Interrupt
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@ -652,10 +653,38 @@ static ssize_t show_chip_id(struct device *dev,
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return sprintf(buf, "%#x\n", ab8500 ? ab8500->chip_id : -EINVAL);
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return sprintf(buf, "%#x\n", ab8500 ? ab8500->chip_id : -EINVAL);
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}
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}
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/*
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* ab8500 has switched off due to (SWITCH_OFF_STATUS):
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* 0x01 Swoff bit programming
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* 0x02 Thermal protection activation
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* 0x04 Vbat lower then BattOk falling threshold
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* 0x08 Watchdog expired
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* 0x10 Non presence of 32kHz clock
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* 0x20 Battery level lower than power on reset threshold
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* 0x40 Power on key 1 pressed longer than 10 seconds
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* 0x80 DB8500 thermal shutdown
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*/
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static ssize_t show_switch_off_status(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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int ret;
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u8 value;
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struct ab8500 *ab8500;
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ab8500 = dev_get_drvdata(dev);
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ret = get_register_interruptible(ab8500, AB8500_RTC,
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AB8500_SWITCH_OFF_STATUS, &value);
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if (ret < 0)
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return ret;
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return sprintf(buf, "%#x\n", value);
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}
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static DEVICE_ATTR(chip_id, S_IRUGO, show_chip_id, NULL);
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static DEVICE_ATTR(chip_id, S_IRUGO, show_chip_id, NULL);
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static DEVICE_ATTR(switch_off_status, S_IRUGO, show_switch_off_status, NULL);
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static struct attribute *ab8500_sysfs_entries[] = {
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static struct attribute *ab8500_sysfs_entries[] = {
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&dev_attr_chip_id.attr,
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&dev_attr_chip_id.attr,
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&dev_attr_switch_off_status.attr,
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NULL,
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NULL,
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};
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};
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@ -697,6 +726,24 @@ int __devinit ab8500_init(struct ab8500 *ab8500)
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}
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}
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ab8500->chip_id = value;
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ab8500->chip_id = value;
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/*
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* ab8500 has switched off due to (SWITCH_OFF_STATUS):
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* 0x01 Swoff bit programming
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* 0x02 Thermal protection activation
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* 0x04 Vbat lower then BattOk falling threshold
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* 0x08 Watchdog expired
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* 0x10 Non presence of 32kHz clock
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* 0x20 Battery level lower than power on reset threshold
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* 0x40 Power on key 1 pressed longer than 10 seconds
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* 0x80 DB8500 thermal shutdown
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*/
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ret = get_register_interruptible(ab8500, AB8500_RTC,
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AB8500_SWITCH_OFF_STATUS, &value);
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if (ret < 0)
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return ret;
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dev_info(ab8500->dev, "switch off status: %#x", value);
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if (plat && plat->init)
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if (plat && plat->init)
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plat->init(ab8500);
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plat->init(ab8500);
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