Implement standard ioctls for polling the battery status and clearing
the battery low indication from userspace.
Signed-off-by: Marek Vasut <marex@xxxxxxx>
Cc: Alexandre Belloni <alexandre.belloni@xxxxxxxxxxxxxxxxxx>
---
drivers/rtc/rtc-abx80x.c | 38 ++++++++++++++++++++++++++++++++++++++
1 file changed, 38 insertions(+)
diff --git a/drivers/rtc/rtc-abx80x.c b/drivers/rtc/rtc-abx80x.c
index d8e94edcb0ba9..4d24f7288ad76 100644
--- a/drivers/rtc/rtc-abx80x.c
+++ b/drivers/rtc/rtc-abx80x.c
@@ -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)
--
2.18.0
