tree 507acbf35eef34796ec4f87464cef97dc402d207
parent e4c8e2ac78b9ebf6cf003f15eb37d199f8b7928d
author Jaehoon Chung <jh80.chung@samsung.com> 1483079411 +0900
committer Jaehoon Chung <jh80.chung@samsung.com> 1484126087 +0900

mmc: sdhci: disable the 8bit mode when host doesn't support it

Buswidth is depeneded on Hardware schematic.
Evne though host can support the 8bit buswidth, if hardware doesn't
support 8bit mode, it doesn't work fine.
So the buswidth mode selection leaves a matter in each SoC drivers.

On the contrary to this, hardware supports 8bit mode, but host doesn't
support it. then controller has to disable the MMC_MODE_8BIT.
(Host can check whether 8bit mode is supported or not, since V3.0)

Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>