Re: [PATCH v2 2/2] pinctrl: sh-pfc: r8a7794: initialize TDSEL register for ES1.0

[Simon Horman <horms@xxxxxxxxxxxx>]

On Mon, Jan 07, 2019 at 11:13:20PM +0100, Wolfram Sang wrote:
> Documentation for ES1.0 says that some bits in TDSEL must be set (ch
> 5.3.35 in R-Car E2 v0.5). However, the reset value of the register is 0,
> so software has to do it. Add this to the kernel driver to ensure this
> is really done independent of firmware versions and use whitelisting for
> ES versions known to need this.
> 
> This is needed for some SD cards supporting SDR104 transfer mode.

Reviewed-by: Simon Horman <horms+renesas@xxxxxxxxxxxx>