From: Wolfram Sang <wsa+renesas@xxxxxxxxxxxxxxxxxxxx> When switching to 1.8V for exposed SD card slots, switch pins from 10pF to 40pF. Hardcoded for Gen3 Salvator-X boards. With this patch, my Samsung card can be reliably tuned with SDR104 \o/ Before, the bus just stalled. SanDisk card still has issues, needs further debugging. But I think we want this setting in DT. Not for upstream! Inspired by the fact that a firmware update improved the situation for Simon (I did not update yet!). Simon, can you test as well? Not-Signed-off-by: Wolfram Sang <wsa+renesas@xxxxxxxxxxxxxxxxxxxx> --- drivers/pinctrl/sh-pfc/pinctrl.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/pinctrl/sh-pfc/pinctrl.c b/drivers/pinctrl/sh-pfc/pinctrl.c index c5772584594ce3..f69305a3200c42 100644 --- a/drivers/pinctrl/sh-pfc/pinctrl.c +++ b/drivers/pinctrl/sh-pfc/pinctrl.c @@ -721,6 +721,12 @@ static int sh_pfc_pinconf_set(struct pinctrl_dev *pctldev, unsigned _pin, else val &= ~BIT(bit); sh_pfc_write_reg(pfc, pocctrl, 32, val); + + if (mV == 3300) + sh_pfc_write_reg(pfc, 0xe60603c0, 32, 0); + else + sh_pfc_write_reg(pfc, 0xe60603c0, 32, 0xc3); + spin_unlock_irqrestore(&pfc->lock, flags); break; -- 2.9.3
