From: Geert Uytterhoeven <geert@linux-m68k.org>
To: Ulf Hansson <ulf.hansson@linaro.org>
Cc: Chris Brandt <chris.brandt@renesas.com>,
Wolfram Sang <wsa+renesas@sang-engineering.com>,
Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>,
Simon Horman <horms+renesas@verge.net.au>,
linux-mmc <linux-mmc@vger.kernel.org>,
Linux-Renesas <linux-renesas-soc@vger.kernel.org>
Subject: Re: [PATCH v3 1/3] mmc: sh_mobile_sdhi: add ocr_mask option
Date: Tue, 13 Sep 2016 15:26:14 +0200 [thread overview]
Message-ID: <CAMuHMdVGgWaVcC4Pfuf0NSTpU4ahdEg6Q7iKZ1n+mb7KexE6yg@mail.gmail.com> (raw)
In-Reply-To: <CAPDyKFqdznJ4xr5=L862uOfvqjsRpR3d+yRWtN1-8H5ZvP9GeQ@mail.gmail.com>
Hi Ulf,
On Tue, Sep 13, 2016 at 2:57 PM, Ulf Hansson <ulf.hansson@linaro.org> wrote:
> On 12 September 2016 at 16:15, Chris Brandt <chris.brandt@renesas.com> 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@linux-m68k.org
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
next prev parent reply other threads:[~2016-09-13 13:26 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-09-12 14:15 [PATCH v3 0/3] mmc: sh_mobile_sdhi: Add r7s72100 support Chris Brandt
2016-09-12 14:15 ` [PATCH v3 1/3] mmc: sh_mobile_sdhi: add ocr_mask option Chris Brandt
2016-09-13 12:57 ` Ulf Hansson
2016-09-13 13:26 ` Geert Uytterhoeven [this message]
2016-09-13 13:50 ` Chris Brandt
2016-09-13 15:10 ` Ulf Hansson
2016-09-13 15:59 ` Chris Brandt
2016-09-17 9:12 ` Ulf Hansson
2016-09-17 13:38 ` Chris Brandt
2016-09-13 13:28 ` Chris Brandt
2016-10-20 13:05 ` Wolfram Sang
2016-09-12 14:15 ` [PATCH v3 2/3] mmc: tmio-mmc: add support for 32bit data port Chris Brandt
2016-09-22 8:13 ` Ulf Hansson
2016-10-14 13:18 ` Chris Brandt
2016-10-17 13:36 ` Ulf Hansson
2016-10-17 15:15 ` Wolfram Sang
2016-10-20 13:28 ` Wolfram Sang
2016-10-20 14:35 ` Chris Brandt
2016-10-20 23:12 ` Wolfram Sang
2016-10-21 13:43 ` Chris Brandt
2016-10-21 21:56 ` Wolfram Sang
2016-10-24 11:06 ` Geert Uytterhoeven
2016-10-24 11:11 ` Wolfram Sang
2016-10-24 12:37 ` Chris Brandt
2016-10-20 19:46 ` Chris Brandt
2016-10-20 23:04 ` Wolfram Sang
2016-11-01 8:49 ` Wolfram Sang
2016-11-01 13:40 ` Chris Brandt
2016-11-01 15:07 ` Wolfram Sang
2016-11-01 15:13 ` Chris Brandt
2016-09-12 14:15 ` [PATCH v3 3/3] mmc: sh_mobile_sdhi: Add r7s72100 support Chris Brandt
2016-11-01 8:49 ` Wolfram Sang
2016-10-14 13:14 ` [PATCH v3 0/3] " Chris Brandt
2016-11-07 18:38 ` Ulf Hansson
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