linux-kernel - Re: [PATCH 0/5] mmc: sdhci-pxav3: Enable support for PXA1928 SDCHI controller

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Date:	Mon, 7 Sep 2015 16:06:05 +0530
From:	Vaibhav Hiremath <vaibhav.hiremath@...aro.org>
To:	linux-mmc@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	kliu5@...vell.com, ulf.hansson@...aro.org
Subject: Re: [PATCH 0/5] mmc: sdhci-pxav3: Enable support for PXA1928 SDCHI
 controller



On Friday 04 September 2015 09:02 PM, Vaibhav Hiremath wrote:
> PXA1928 SDHCI controller has few differences, for example,
>
>                             PXAxxx                    PXA1928
>                             ======                    =======
>     SDCLK_DELAY field       0x10A                     0x114
>     SDCLK_DELAY mask        0x1F                      0x3FF
>     SDCLK_DELAY shift        9                          8
>     SDCLK_SEL shift          8                          2 (SEL1)
>
> So this patch series introduces new compatible device_id
> (marvell,pxav3-1928-sdhci), and makes use of .data for handling
> such differences.
>
> The series also adds support like,
>
>   - independent ->set_clock() api, as we need to enable internal clock gate
>      and TX clock
>   - pinctrl configuration based on bus speed.
>   - introduce new quirk SDHCI_QUIRK2_MUST_SET_SDHCI_BUS_POWER
>     SD_BUS_POWER & SD_BUS_VLT bit-fields are used internally to gate the
>     clocks, so it is important to configure them as part of ->set_power()
>     More detailed description is written into commit log.
>   - Enable SDHCI_QUIRK_BROKEN_TIMEOUT_VAL for PXA1928 device_id
>

Please ignore this series, as one residual change (rather typo error).
Mistakenly while checking in the code, instead of 1928 compatible
property it was 988.

I will submit the new series shortly.

Thanks,
Vaibhav


>
> Testing:
> I have done basic testing on both eMMC and SD card on PXA1928 based
> platform.
>
> Note: I tried to made sure that I do not break any other platform, which
> used sdhci, except HS200 configuration.
> Unfortunately I do not have access to any other datasheets, where I can
> cross check the details on HS200 bit-fields. Probably someone who has
> access can confirm [PATCH 4/5], whether it impacts other platforms.
>
> Kevin Liu (1):
>    mmc: sdhci-pxav3: Fix HS200 mode support
>
> Vaibhav Hiremath (4):
>    mmc: sdhci-pxav3: Enable pxa1928 device support
>    mmc: sdhci-pxav3: Add platform specific set_clock ops
>    mmc: sdhci-pxav3: Add pinctl setting according to bus clock
>    mmc: sdhci: add new quirk for setting BUS_POWER & BUS_VLT fields
>
>   drivers/mmc/host/sdhci-pltfm.c |   3 +
>   drivers/mmc/host/sdhci-pxav3.c | 168 ++++++++++++++++++++++++++++++++++++++---
>   drivers/mmc/host/sdhci.c       |   3 +-
>   drivers/mmc/host/sdhci.h       |   2 +
>   4 files changed, 163 insertions(+), 13 deletions(-)
>
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