From: Alexander Feilke <[email protected]> Retrofit from upstream linux to try resetting the device after power loss.
Signed-off-by: Alexander Feilke <[email protected]> --- drivers/rtc/pcf85063.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/drivers/rtc/pcf85063.c b/drivers/rtc/pcf85063.c index 107e8b4d4c8..421c42c0b81 100644 --- a/drivers/rtc/pcf85063.c +++ b/drivers/rtc/pcf85063.c @@ -185,6 +185,20 @@ static int pcf85063_probe(struct udevice *dev) return err; } + /* + * If a Power loss is detected, SW reset the device. + * From PCF85063A datasheet: + * There is a low probability that some devices will have corruption + * of the registers after the automatic power-on reset... + */ + if (tmp & PCF85063_REG_SC_OS) { + dev_warn(dev, "POR issue detected, sending a SW reset\n"); + err = dm_i2c_reg_clrset(dev, PCF85063_REG_CTRL1, + 0xff, PCF85063_REG_CTRL1_SWR); + if (err < 0) + dev_warn(dev, "SW reset failed, trying to continue\n"); + } + err = pcf85063_load_capacitance(dev); if (err < 0) dev_warn(dev, "failed to set xtal load capacitance: %d", -- 2.34.1
