Commit eca1b3c2 authored by Alexandre Belloni's avatar Alexandre Belloni
Browse files

rtc: rx8111: handle VLOW flag 



Allow userspace to get battery status information and be able to warn when
battery is low and has to be replaced.

Tested-by: default avatarWaqar Hameed <waqar.hameed@axis.com>
Reviewed-by: default avatarWaqar Hameed <waqar.hameed@axis.com>
Link: https://lore.kernel.org/r/20240417191937.33790-2-alexandre.belloni@bootlin.com


Signed-off-by: default avatarAlexandre Belloni <alexandre.belloni@bootlin.com>
parent b7ff9efe

drivers/rtc/rtc-rx8111.c

+12 −0
Original line number Diff line number Diff line
@@ -95,6 +95,9 @@ enum rx8111_regfield { 
	RX8111_REGF_INIEN,

	RX8111_REGF_CHGEN,



	/* RX8111_REG_STATUS_MON. */

	RX8111_REGF_VLOW,



	/* Sentinel value. */

	RX8111_REGF_MAX

};
@@ -129,6 +132,8 @@ static const struct reg_field rx8111_regfields[] = { 
	[RX8111_REGF_SWSEL1] = REG_FIELD(RX8111_REG_PWR_SWITCH_CTRL, 3, 3),

	[RX8111_REGF_INIEN]  = REG_FIELD(RX8111_REG_PWR_SWITCH_CTRL, 6, 6),

	[RX8111_REGF_CHGEN]  = REG_FIELD(RX8111_REG_PWR_SWITCH_CTRL, 7, 7),



	[RX8111_REGF_VLOW]  = REG_FIELD(RX8111_REG_STATUS_MON, 1, 1),

};



static const struct regmap_config rx8111_regmap_config = {
@@ -276,6 +281,13 @@ static int rx8111_ioctl(struct device *dev, unsigned int cmd, unsigned long arg) 


		vlval = regval ? RTC_VL_DATA_INVALID : 0;



		ret = regmap_field_read(data->regfields[RX8111_REGF_VLOW],

					&regval);

		if (ret)

			return ret;



		vlval |= regval ? RTC_VL_BACKUP_LOW : 0;



		return put_user(vlval, (typeof(vlval) __user *)arg);

	default:

		return -ENOIOCTLCMD;