Hi, On Thursday 13 June 2013 20:22:42 Balaji T K wrote: > 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. > > Thanks for the link, I think I need some time to understand > where pfc->window[1].virt is coming from. That's just the ioremapped pinctrl device address spaced. -- Regards, Laurent Pinchart -- To unsubscribe from this list: send the line "unsubscribe linux-mmc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
