Messages in this thread Patch in this message | | | From | Frank Wunderlich <> | Subject | [PATCH 1/2] rtc: hym8563: try multiple times to init device | Date | Wed, 8 Jun 2022 18:11:48 +0200 |
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From: Peter Geis <pgwipeout@gmail.com>
RTC sometimes does not respond the first time in init. Try multiple times to get a response.
Signed-off-by: Peter Geis <pgwipeout@gmail.com> Signed-off-by: Frank Wunderlich <frank-w@public-files.de> --- drivers/rtc/rtc-hym8563.c | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-)
diff --git a/drivers/rtc/rtc-hym8563.c b/drivers/rtc/rtc-hym8563.c index 90e602e99d03..9adcedaa4613 100644 --- a/drivers/rtc/rtc-hym8563.c +++ b/drivers/rtc/rtc-hym8563.c @@ -13,6 +13,7 @@ #include <linux/clk-provider.h> #include <linux/i2c.h> #include <linux/bcd.h> +#include <linux/delay.h> #include <linux/rtc.h> #define HYM8563_CTL1 0x00 @@ -438,10 +439,16 @@ static irqreturn_t hym8563_irq(int irq, void *dev_id) static int hym8563_init_device(struct i2c_client *client) { - int ret; + int ret, i; /* Clear stop flag if present */ - ret = i2c_smbus_write_byte_data(client, HYM8563_CTL1, 0); + for (i = 0; i < 3; i++) { + ret = i2c_smbus_write_byte_data(client, HYM8563_CTL1, 0); + if (ret == 0) + break; + msleep(20); + } + if (ret < 0) return ret; -- 2.34.1
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