15 Jun
2016
15 Jun
'16
12:45 p.m.
On Tue, Jun 14, 2016 at 11:53 PM, Peng Fan van.freenix@gmail.com wrote:
From: Ye Li ye.li@nxp.com
The USDHC move the 4 clock bits CARD_CLK_SOFT_EN, IPG_PERCLK_SOFT_EN, HCLK_SOFT_EN, and IPG_CLK_SOFT_EN from sysctl register to vendorspec register. The driver uses RSTA to replace the clock gate off operation. But this is not a good solution. This is because:
- when using RSTA, we should wait this bit to clear by itself. This is not implemeneted in the code.
- After RSTA is set, it is recommended that the Host Driver reset the external card and reinitialize it.
So in this patch, we change to use the vendorspec registers for these bits operation.
Signed-off-by: Ye Li ye.li@nxp.com Signed-off-by: Peng Fan van.freenix@gmail.com Cc: York Sun york.sun@nxp.com Cc: Stefano Babic sbabic@denx.de Cc: Pantelis Antoniou panto@antoniou-consulting.com Cc: Fabio Estevam fabio.estevam@nxp.com
Tested-by: Fabio Estevam fabio.estevam@nxp.com