Hi Ulrich, (CC'ing Lars-Peter Clausen) Thank you for the patch. On Tuesday 10 November 2015 14:39:00 Ulrich Hecht wrote: > Initialization of the ADV7180 chip fails on the Renesas R8A7790-based > Lager board about 50% of the time. This patch resolves the issue by > increasing the minimum delay after reset from 2 ms to 5 ms, following the > recommendation in the ADV7180 datasheet: > > "Executing a software reset takes approximately 2 ms. However, it is > recommended to wait 5 ms before any further I2C writes are performed." > > Signed-off-by: Ulrich Hecht <ulrich.hecht+renesas@xxxxxxxxx> Acked-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx> Lars, would you like to take this in your tree with other Analog Devices patches, or should I take it ? > --- > drivers/media/i2c/adv7180.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/media/i2c/adv7180.c b/drivers/media/i2c/adv7180.c > index f82c8aa..3c3c4bf 100644 > --- a/drivers/media/i2c/adv7180.c > +++ b/drivers/media/i2c/adv7180.c > @@ -1112,7 +1112,7 @@ static int init_device(struct adv7180_state *state) > mutex_lock(&state->mutex); > > adv7180_write(state, ADV7180_REG_PWR_MAN, ADV7180_PWR_MAN_RES); > - usleep_range(2000, 10000); > + usleep_range(5000, 10000); > > ret = state->chip_info->init(state); > if (ret) -- Regards, Laurent Pinchart -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
