Attempt to power off in case of critical events such as battery removal, over voltage events.
There is no guarentee that we'd be in a safe scenario here, but the very least we can try to do is to power off the device to prevent damage to the system instead of just printing a message and hoping for the best. NOTE: twl4030 should attempt some form of recovery, but just depending on that is never a safe alternative. Signed-off-by: Nishanth Menon <n...@ti.com> --- new patch. original attempt was: https://patchwork.kernel.org/patch/4002371/ NOTE: we dont have poweroff support yet enabled on LDP, but it just needs relevant dts entry. drivers/power/twl4030_charger.c | 26 +++++++++++++++++++++----- 1 file changed, 21 insertions(+), 5 deletions(-) diff --git a/drivers/power/twl4030_charger.c b/drivers/power/twl4030_charger.c index 2598c58..ed0dbd2 100644 --- a/drivers/power/twl4030_charger.c +++ b/drivers/power/twl4030_charger.c @@ -22,6 +22,7 @@ #include <linux/power_supply.h> #include <linux/notifier.h> #include <linux/usb/otg.h> +#include <linux/reboot.h> #include <linux/regulator/machine.h> #define TWL4030_BCIMSTATEC 0x02 @@ -332,6 +333,7 @@ static irqreturn_t twl4030_bci_interrupt(int irq, void *arg) struct twl4030_bci *bci = arg; u8 irqs1, irqs2; int ret; + bool power_off = false; ret = twl_i2c_read_u8(TWL4030_MODULE_INTERRUPTS, &irqs1, TWL4030_INTERRUPTS_BCIISR1A); @@ -352,20 +354,34 @@ static irqreturn_t twl4030_bci_interrupt(int irq, void *arg) } /* various monitoring events, for now we just log them here */ - if (irqs1 & (TWL4030_TBATOR2 | TWL4030_TBATOR1)) + if (irqs1 & (TWL4030_TBATOR2 | TWL4030_TBATOR1)) { dev_warn(bci->dev, "battery temperature out of range\n"); + power_off = true; + } - if (irqs1 & TWL4030_BATSTS) + if (irqs1 & TWL4030_BATSTS) { dev_crit(bci->dev, "battery disconnected\n"); + power_off = true; + } - if (irqs2 & TWL4030_VBATOV) + if (irqs2 & TWL4030_VBATOV) { dev_crit(bci->dev, "VBAT overvoltage\n"); + power_off = true; + } - if (irqs2 & TWL4030_VBUSOV) + if (irqs2 & TWL4030_VBUSOV) { dev_crit(bci->dev, "VBUS overvoltage\n"); + power_off = true; + } - if (irqs2 & TWL4030_ACCHGOV) + if (irqs2 & TWL4030_ACCHGOV) { dev_crit(bci->dev, "Ac charger overvoltage\n"); + power_off = true; + } + + /* Try to shutdown the system */ + if (power_off) + orderly_poweroff(true); return IRQ_HANDLED; } -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
