On Mon, Jun 12, 2017 at 09:00:35AM +0200, Christian Hemp wrote: > According to the Errata ERR004346 (WDOG: WDOG SRS bit requires to be written > twice), add another two writes to ensure there must be at least two > writes happen in the same one 32kHz clock period. > Without this two additional writes, the system will not reset always. > > Tested with i.MX6Quad and i.MX6 UltraLite > > Signed-off-by: Christian Hemp <c.hemp@xxxxxxxxx> Applied, thanks Sascha > --- > drivers/watchdog/imxwd.c | 4 ++++ > 1 file changed, 4 insertions(+) > > diff --git a/drivers/watchdog/imxwd.c b/drivers/watchdog/imxwd.c > index b920c72..0617fc6 100644 > --- a/drivers/watchdog/imxwd.c > +++ b/drivers/watchdog/imxwd.c > @@ -134,6 +134,10 @@ static void imx21_soc_reset(struct imx_wd *priv) > val |= IMX21_WDOG_WCR_WDA; /* do not assert ext-reset */ > > writew(val, priv->base + IMX21_WDOG_WCR); > + > + /* Two additional writes due to errata ERR004346 */ > + writew(val, priv->base + IMX21_WDOG_WCR); > + writew(val, priv->base + IMX21_WDOG_WCR); > } > > static int imx_watchdog_set_timeout(struct watchdog *wd, unsigned timeout) > -- > 1.9.1 > > > _______________________________________________ > barebox mailing list > barebox@xxxxxxxxxxxxxxxxxxx > http://lists.infradead.org/mailman/listinfo/barebox > -- Pengutronix e.K. | | Industrial Linux Solutions | http://www.pengutronix.de/ | Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 | _______________________________________________ barebox mailing list barebox@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/barebox
