linux-kernel - Re: [PATCH v5 0/9] Add sd/emmc support for stih407 family silicon

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Date:	Thu, 30 Apr 2015 10:55:28 +0200
From:	Maxime Coquelin <maxime.coquelin@...com>
To:	Ulf Hansson <ulf.hansson@...aro.org>
CC:	Peter Griffin <peter.griffin@...aro.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Patrice CHOTARD <patrice.chotard@...com>,
	Giuseppe Cavallaro <peppe.cavallaro@...com>,
	Lee Jones <lee.jones@...aro.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	linux-mmc <linux-mmc@...r.kernel.org>
Subject: Re: [PATCH v5 0/9] Add sd/emmc support for stih407 family silicon



On 04/30/2015 10:51 AM, Ulf Hansson wrote:
> On 30 April 2015 at 10:28, Maxime Coquelin <maxime.coquelin@...com> wrote:
>> Hi Ulf,
>>
>>
>> On 04/10/2015 01:06 PM, Ulf Hansson wrote:
>>> On 10 April 2015 at 11:40, Peter Griffin <peter.griffin@...aro.org> wrote:
>>>> Hi,
>>>>
>>>> This series adds sd/emmc support to the sdhci-st.c driver for stih407
>>>> family silicon. The changes mainly involve configuring some extra glue
>>>> registers in the flashSS which configure the Arasan controller.
>>>>
>>>> This series also adds support for UHS modes for eMMC. To allow
>>>> UHS HS200/SD104 modes to function correctly, due to the
>>>> tight timing constriants, support for delay management is also added.
>>>> Two types of delay management are supported, static delay management and
>>>> dynamic delay management, this delay management is only available
>>>> on eMMC pads on stih410 and later silicon.
>>>>
>>>> This series has been tested with stih410-b2120 revd on eMMC and sd, at
>>>> various clock speeds. As part of this testing a bug was also found in the
>>>> upstream flexgen clock set_rate implementation (now fixed upstream).
>>>>
>>>>       max-frequency = 200Mhz
>>>>       /dev/mmcblk0p1:
>>>>        Timing buffered disk reads: 270 MB in  3.02 seconds =  89.54 MB/sec
>>>>
>>>>       max-frequency = 100Mhz
>>>>       root@...ian-armhf:~# hdparm -t /dev/mmcblk0p1
>>>>       /dev/mmcblk0p1:
>>>>        Timing buffered disk reads: 210 MB in  3.00 seconds =  70.00 MB/sec
>>>>
>>>>       max-frequency = 50Mhz
>>>>       root@...ian-armhf:~# hdparm -t /dev/mmcblk0p1
>>>>       /dev/mmcblk0p1:
>>>>        Timing buffered disk reads: 118 MB in  3.00 seconds =  39.28 MB/sec
>>>>
>>>> It has also been tested on stih416-b2020 to ensure we have caused no
>>>> regressions. Finally the dt documentation has been updated to reflect
>>>> the changes in the driver code. Intrestingly it seems we are the first
>>>> upstream platform to be using some of the uhs bindings such as
>>>> sd-uhs-sdr104.
>>>>
>>>> Changes since v4:
>>>>    - Fixup typo (Pete)
>>>>
>>>> Changes since v3:
>>>>    - Rebased on Ulf's mmc next branch (rc5 based) (Ulf)
>>>>
>>>> Changes since v2:
>>>>    - Some whitespace fixups (Max)
>>>>    - if (!ioaddr) suggestion (Max)
>>>>    - Add stih418-b2199 suport (Max)
>>>>    - Stih410 to STiH410 fixes (Max)
>>>>    - rebased on v4.0-rc6 (Pete)
>>>>
>>>> Changes since v1:
>>>>    - Partition the changes into smaller patches to aid review process
>>>> (Ulf)
>>>>
>>>> Peter Griffin (9):
>>>>     mmc: sdhci-st: Add macros for register offsets and bitfields for mmcss
>>>>       glue regs
>>>>     mmc: sdhci-st: Add support for de-asserting reset signal and top regs
>>>>       resource
>>>>     mmc: sdhci-st: Add delay management functions for top registers
>>>>       (eMMC).
>>>>     mmc: sdhci-st: Add st_mmcss_cconfig function to configure mmcss glue
>>>>       registers.
>>>>     mmc: sdhci-st: Add sdhci_st_set_uhs_signaling function.
>>>>     mmc: sdhci-st: Update the quirks for this controller.
>>>>     mmc: sdhci-st: Update ST SDHCI binding documentation.
>>>>     ARM: STi: DT: STiH407: Add dt nodes for sdhci and emmc.
>>>>     ARM: STi: DT: STiH418: Add dt nodes for sdhci and emmc.
>>>>
>>>>    Documentation/devicetree/bindings/mmc/sdhci-st.txt | 100 +++++-
>>>>    arch/arm/boot/dts/stih407-family.dtsi              |  30 ++
>>>>    arch/arm/boot/dts/stih410-b2120.dts                |  10 +
>>>>    arch/arm/boot/dts/stih418-b2199.dts                |  12 +
>>>>    arch/arm/boot/dts/stihxxx-b2120.dtsi               |   8 +
>>>>    drivers/mmc/host/sdhci-st.c                        | 354
>>>> ++++++++++++++++++++-
>>>>    6 files changed, 500 insertions(+), 14 deletions(-)
>>>>
>>>> --
>>>> 1.9.1
>>>>
>>> Thanks! Applied.
>> Do you confirm you didn't applied the DT patches?
>>
> Correct. Sorry if that was unclear.
No problem, thanks for the clarification.

Best regards,
Maxime

>
> Kind regards
> Uffe

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