On Thursday 13 June 2013 03:32 PM, Laurent Pinchart wrote:
On Thursday 13 June 2013 02:53:54 Tony Lindgren wrote:
* Linus Walleij <linus.walleij@xxxxxxxxxx> [130613 02:42]:
On Thu, Jun 6, 2013 at 9:14 PM, Balaji T K <balajitk@xxxxxx> wrote:
PBIAS register configuration is based on the regulator voltage
which supplies these pbias cells, sd i/o pads.
With PBIAS register address and bit definitions different across
omap[3,4,5], Simplify PBIAS configuration under three different
regulator voltage levels - O V, 1.8 V, 3 V. Corresponding pinctrl states
are defined as pbias_off, pbias_1v8, pbias_3v.
pinctrl state mmc_init is used for configuring speed mode, loopback
clock (in devconf0/devconf1/prog_io1 register for omap3) and pull
strength configuration (in control_mmc1 for omap4)
Signed-off-by: Balaji T K <balajitk@xxxxxx>
You *need* Lee Jones and Mark Brown to review this.
Maybe Laurent has something to add too.
Ux500 had the very same thing, and there this was solved using
a GPIO regulator for "vqmmc" a level-shifter. I vaguely remember
Laurent doing something similar with the SH stuff.
The SH pinctrl driver registers an MMC regulator. The code is available at
git://git.kernel.org/pub/scm/linux/kernel/git/horms/renesas.git. Look at
drivers/pinctrl/sh-pfc/pfc-sh73a0.c in tags/renesas-next-20130611v2.
Hi,
Thanks for the link, I think I need some time to understand
where pfc->window[1].virt is coming from.
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