[U-Boot] [PATCH 1/4] ARM: dts: dra7-mmc-iodelay: Add a new pinctrl group for clk line without pullup

[Tom Rini]

On Thu, Jun 20, 2019 at 03:07:19PM +0530, Faiz Abbas wrote:

> During a short period when the bus voltage is switched from 3.3v to 1.8v,
> (to enumerate UHS mode), the mmc module is disabled and the mmc IO lines
> are kept in a state according to the programmed pad mux pull type.
> 
> According to 4.2.4.2 Timing to Switch Signal Voltage in "SD Specifications
> Part 1 Physical Layer Specification Version 5.00 February 22, 2016", the
> host should hold CLK low for at least 5ms.
> 
> In order to keep the card line low during voltage switch, the pad mux of
> mmc1_clk line should be configured to pull down.
> 
> Add a new pinctrl group for clock line without pullup to be used in boards
> where mmc1_clk line is not connected to an external pullup.
> 
> Signed-off-by: Faiz Abbas <faiz_abbas at ti.com>

Applied to u-boot/master, thanks!

-- 
Tom
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 819 bytes
Desc: not available
URL: <http://lists.denx.de/pipermail/u-boot/attachments/20190728/ebbd5da9/attachment.sig>