On Tue, Jan 29, 2019 at 06:40:39AM +0100, marek.vasut@gmail.com wrote:
> From: Takeshi Saito <takeshi.saito.xv@renesas.com>
> 
> This fixes card initialization failure in high speed mode.
> 
> If U-Boot uses SDR or HS200/400 mode before starting Linux and Linux
> DT does not enable SDR/HS200/HS400 mode, card initialization fails in
> high speed mode.
> 
> It is necessary to initialize SCC registers during card initialization
> phase. HW reset function is registered only for a port with either of
> SDR/HS200/HS400 properties in device tree. If SDR/HS200/HS400 properties
> are not present in device tree, SCC registers will not be reset. In SoC
> that support SCC registers, HW reset function should be registered
> regardless of the configuration of device tree.
> 
> Reproduction procedure:
> - Use U-Boot that support MMC HS200/400 mode.
> - Delete HS200/HS400 properties in device tree.
>   (Delete mmc-hs200-1_8v and mmc-hs400-1_8v)
> - MMC port works high speed mode and all commands fail.
> 
> Signed-off-by: Takeshi Saito <takeshi.saito.xv@renesas.com>
> Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
> Cc: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
> Cc: Simon Horman <horms+renesas@verge.net.au>
> Cc: Ulf Hansson <ulf.hansson@linaro.org>
> Cc: Wolfram Sang <wsa+renesas@sang-engineering.com>
> Cc: linux-renesas-soc@vger.kernel.org
> To: linux-mmc@vger.kernel.org

Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>