[PATCH V2] rtc: ds1307: Enable battery backup on RX8130
From: Marek Vasut <marex@denx.de>
Date: 2019-09-05 13:03:47
Subsystem:
real time clock (rtc) subsystem, the rest · Maintainers:
Alexandre Belloni, Linus Torvalds
The battery backup can be disabled on this RTC, e.g. if populated right out of production. Force the battery backup bit on to enable it. Signed-off-by: Marek Vasut <marex@denx.de> Cc: Arnaud Ebalard <redacted> Cc: Alexandre Belloni <redacted> Cc: Bastian Krause <redacted> --- V2: Drop the custom offset, let regmap handle that --- drivers/rtc/rtc-ds1307.c | 7 +++++++ 1 file changed, 7 insertions(+)
diff --git a/drivers/rtc/rtc-ds1307.c b/drivers/rtc/rtc-ds1307.c
index 1f7e8aefc1eb..f2d1e59478c2 100644
--- a/drivers/rtc/rtc-ds1307.c
+++ b/drivers/rtc/rtc-ds1307.c@@ -121,6 +121,8 @@ enum ds_type { #define RX8130_REG_FLAG_AF BIT(3) #define RX8130_REG_CONTROL0 0x1e #define RX8130_REG_CONTROL0_AIE BIT(3) +#define RX8130_REG_CONTROL1 0x1f +#define RX8130_REG_CONTROL1_INIEN BIT(4) #define MCP794XX_REG_CONTROL 0x07 # define MCP794XX_BIT_ALM0_EN 0x10
@@ -1750,6 +1752,11 @@ static int ds1307_probe(struct i2c_client *client, DS1307_REG_HOUR << 4 | 0x08, hour); } break; + case rx_8130: + /* make sure that the backup battery is enabled */ + regmap_write(ds1307->regmap, RX8130_REG_CONTROL1, + RX8130_REG_CONTROL1_INIEN); + break; default: break; }
--
2.23.0.rc1