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Commit ffe1c5a2 authored by Marek Vasut's avatar Marek Vasut Committed by Alexandre Belloni
Browse files

rtc: abx80x: Implement RTC_VL_READ,CLR ioctls 



Implement standard ioctls for polling the battery status and clearing
the battery low indication from userspace.

Signed-off-by: default avatarMarek Vasut <marex@denx.de>
Cc: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: default avatarAlexandre Belloni <alexandre.belloni@bootlin.com>
parent fc979933

drivers/rtc/rtc-abx80x.c

+38 −0
Original line number Diff line number Diff line
@@ -38,6 +38,7 @@ 


#define ABX8XX_REG_STATUS	0x0f

#define ABX8XX_STATUS_AF	BIT(2)

#define ABX8XX_STATUS_BLF	BIT(4)

#define ABX8XX_STATUS_WDT	BIT(6)



#define ABX8XX_REG_CTRL1	0x10
@@ -507,12 +508,49 @@ static int abx80x_alarm_irq_enable(struct device *dev, unsigned int enabled) 
	return err;

}



static int abx80x_ioctl(struct device *dev, unsigned int cmd, unsigned long arg)

{

	struct i2c_client *client = to_i2c_client(dev);

	int status, tmp;



	switch (cmd) {

	case RTC_VL_READ:

		status = i2c_smbus_read_byte_data(client, ABX8XX_REG_STATUS);

		if (status < 0)

			return status;



		tmp = !!(status & ABX8XX_STATUS_BLF);



		if (copy_to_user((void __user *)arg, &tmp, sizeof(int)))

			return -EFAULT;



		return 0;



	case RTC_VL_CLR:

		status = i2c_smbus_read_byte_data(client, ABX8XX_REG_STATUS);

		if (status < 0)

			return status;



		status &= ~ABX8XX_STATUS_BLF;



		tmp = i2c_smbus_write_byte_data(client, ABX8XX_REG_STATUS, 0);

		if (tmp < 0)

			return tmp;



		return 0;



	default:

		return -ENOIOCTLCMD;

	}

}



static const struct rtc_class_ops abx80x_rtc_ops = {

	.read_time	= abx80x_rtc_read_time,

	.set_time	= abx80x_rtc_set_time,

	.read_alarm	= abx80x_read_alarm,

	.set_alarm	= abx80x_set_alarm,

	.alarm_irq_enable = abx80x_alarm_irq_enable,

	.ioctl		= abx80x_ioctl,

};



static int abx80x_dt_trickle_cfg(struct device_node *np)