On Mon, 2026-05-11 at 14:09 +0200, Alexander Feilke wrote: > From: Alexander Feilke <[email protected]> > > Retrofit from upstream linux to try resetting the device after power loss. > > Signed-off-by: Alexander Feilke <[email protected]>
Reviewed-by: Alexander Sverdlin <[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", -- Alexander Sverdlin Siemens AG www.siemens.com
