Hi Ulf,
On Tue, Sep 13, 2016 at 2:57 PM, Ulf Hansson <ulf.hansson@xxxxxxxxxx> wrote:
> On 12 September 2016 at 16:15, Chris Brandt <chris.brandt@xxxxxxxxxxx> wrote:
>> In moving platforms from board files to DT, there still needs to be a way
>> to set the ocr_mask setting for the tmio driver during probe. Without this
>> setting, the probe will fail because the supported voltages are not known.
>
> Regarding the ocr_mask; How do these SoCs provides the power to the mmc/sd card?
>
> Do note, I am *not* talking about the I/O voltage but the core power
> to the card.
>
> The reason for raising the question is that we have infrastructures in
> the mmc core which can create the ocr_mask, by parsing a regulator's
> voltage range. This is the recommended method to use, instead of using
> hard coded ocr mask values.
On RSKRZA1, 3.3V is provided to the SD/MMC socket through an MIC2026
MOSFET switch.
On Genmai, 3.3V or 5V is provided through an LTC1471 switch.
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
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