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Subject: Re: [PATCH v2 00/40] Tegra SDHCI add support for HS200 and UHS
 signaling
To:     Thierry Reding <thierry.reding@gmail.com>
Cc:     Aapo Vienamo <avienamo@nvidia.com>,
        Rob Herring <robh+dt@kernel.org>,
        Mark Rutland <mark.rutland@arm.com>,
        Jonathan Hunter <jonathanh@nvidia.com>,
        Ulf Hansson <ulf.hansson@linaro.org>,
        Mikko Perttunen <mperttunen@nvidia.com>,
        Stefan Agner <stefan@agner.ch>, devicetree@vger.kernel.org,
        linux-tegra@vger.kernel.org, linux-kernel@vger.kernel.org,
        linux-mmc@vger.kernel.org
References: <1533924522-1037-1-git-send-email-avienamo@nvidia.com>
 <20180827101036.GB18542@ulmo>
From:   Adrian Hunter <adrian.hunter@intel.com>
Organization: Intel Finland Oy, Registered Address: PL 281, 00181 Helsinki,
 Business Identity Code: 0357606 - 4, Domiciled in Helsinki
Message-ID: <fca227a3-04f2-ec6a-1287-ae595d14503e@intel.com>
Date:   Mon, 27 Aug 2018 13:26:35 +0300
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On 27/08/18 13:10, Thierry Reding wrote:
> On Fri, Aug 10, 2018 at 09:08:02PM +0300, Aapo Vienamo wrote:
>> Hi all,
>>
>> This series implements support for faster signaling modes on Tegra
>> SDHCI controllers. This series consist of several parts: changes
>> requried for 1.8 V signaling and pad control, pad calibration, and
>> tuning. Following earlies patch sets have been merged into this
>> larger set: "Tegra PMC pinctrl pad configuration", "Tegra SDHCI enable
>> 1.8 V signaling on Tegar210 and Tegra186", "Tegra SDHCI update the
>> padautocal procedure". Also the patches for enabling SDHCI tuning
>> are added.
>>
>> Changelog:
>> v2:
>> 	- Fix grammar in PMC device tree bindings docs
>> 	- Remove a stray line from tegra sdhci bindings
>> 	- Cosmetic changes to PMC pinctrl driver
>> 	- Fix a typo in "soc/tegra: pmc: Implement
>> 	  tegra_io_pad_is_powered()" commit message
>> 	- Declare mask and value on the same line in
>> 	  tegra_io_pad_is_powered()
>> 	- Move the call to tegra_sdhci_is_pad_and_regulator_valid() to
>> 	  inside the if condition in tegra_sdhci_reset()
>> 	- Use usleep_range() in tegra_sdhci_configure_cal_pad()
>> 	- Move sdhci_writel() out of the enable if-else body in
>> 	  tegra_sdhci_configure_cal_pad()
>> 	- Add a delay before starting polling in
>> 	  tegra_sdhci_pad_autocalib()
>> 	- Use usleep_range() in tegra_sdhci_set_tap()
>> 	- Rename orig_enabled to status in
>> 	  tegra_sdhci_configure_card_clk()
>> 	- Fix if condition wrapping alignment in tegra_sdhci_set_tap()
>>
>> v1:
>> 	- Probe the regulator voltage capabilities to determine whether pinctrl
>> 	  is needed in tegra_sdhci_r eset
>> 	- Don't remove tegra_sdhci_voltage_switch()
>> 	- Use dev_warn() in tegra_sdhci_init_pinctrl_info()
>> 	- Don't change start_signal_voltage_switch callback if pinctrl info
>> 	  invalid
>> 	- Only call udelay(1) on enable in tegra_sdhci_configure_cal_pad()
>> 	- Add nvidia, prefix to pad autocal offset dt props in the example
>>
>> See the original patch sets for earlier changelogs.
>>
>> Aapo Vienamo (40):
>>   dt-bindings: Add Tegra PMC pad configuration bindings
>>   dt-bindings: mmc: tegra: Add pad voltage control properties
>>   dt-bindings: Add Tegra SDHCI pad pdpu offset bindings
>>   dt-bindings: mmc: Add Tegra SDHCI sampling trimmer values
>>   soc/tegra: pmc: Fix pad voltage configuration for Tegra186
>>   soc/tegra: pmc: Factor out DPD register bit calculation
>>   soc/tegra: pmc: Implement tegra_io_pad_is_powered()
>>   soc/tegra: pmc: Use X macro to generate IO pad tables
>>   soc/tegra: pmc: Remove public pad voltage APIs
>>   soc/tegra: pmc: Implement pad configuration via pinctrl
>>   mmc: sdhci: Add a quirk to skip clearing the transfer mode register on
>>     tuning
>>   mmc: tegra: Reconfigure pad voltages during voltage switching
>>   mmc: tegra: Poll for calibration completion
>>   mmc: tegra: Set calibration pad voltage reference
>>   mmc: tegra: Power on the calibration pad
>>   mmc: tegra: Disable card clock during pad calibration
>>   mmc: tegra: Program pad autocal offsets from dt
>>   mmc: tegra: Perform pad calibration after voltage switch
>>   mmc: tegra: Enable pad calibration on Tegra210 and Tegra186
>>   mmc: tegra: Add a workaround for tap value change glitch
>>   mmc: tegra: Parse default trim and tap from dt
>>   mmc: tegra: Configure default tap values
>>   mmc: tegra: Configure default trim value on reset
>>   mmc: tegra: Use standard SDHCI tuning on Tegra210 and Tegra186
>>   mmc: sdhci: Add a quirk to disable card clock during tuning
>>   mmc: tegra: Enable workaround for tuning transfer mode bug
>>   mmc: tegra: Set SDHCI_QUIRK2_TUNE_DIS_CARD_CLK on Tegra210
>>   mmc: tegra: Enable UHS and HS200 modes for Tegra210
>>   mmc: tegra: Enable UHS and HS200 modes for Tegra186
>>   arm64: dts: Add Tegra210 sdmmc pinctrl voltage states
>>   arm64: dts: Add Tegra186 sdmmc pinctrl voltage states
>>   arm64: dts: tegra210-p2180: Allow ldo2 to go down to 1.8 V
>>   arm64: dts: tegra210-p2180: Correct sdmmc4 vqmmc-supply
>>   arm64: dts: tegra210-p2597: Remove no-1-8-v from sdmmc1
>>   arm64: dts: tegra186: Add sdmmc pad auto calibration offsets
>>   arm64: dts: tegra210: Add sdmmc pad auto calibration offsets
>>   arm64: dts: tegra210: Add SDHCI tap and trim values
>>   arm64: dts: tegra186: Add SDHCI tap and trim values
>>   arm64: dts: tegra186: Assign clocks for sdmmc1 and sdmmc4
>>   arm64: dts: tegra210: Assign clocks for sdmmc1 and sdmmc4
>>
>>  .../bindings/arm/tegra/nvidia,tegra186-pmc.txt     |  93 ++++
>>  .../bindings/arm/tegra/nvidia,tegra20-pmc.txt      | 103 ++++
>>  .../bindings/mmc/nvidia,tegra20-sdhci.txt          |  68 +++
>>  arch/arm64/boot/dts/nvidia/tegra186.dtsi           |  74 +++
>>  arch/arm64/boot/dts/nvidia/tegra210-p2180.dtsi     |  12 +-
>>  arch/arm64/boot/dts/nvidia/tegra210-p2597.dtsi     |   1 -
>>  arch/arm64/boot/dts/nvidia/tegra210.dtsi           |  55 ++
>>  drivers/mmc/host/sdhci-tegra.c                     | 556 +++++++++++++++++++--
>>  drivers/mmc/host/sdhci.c                           |  21 +
>>  drivers/mmc/host/sdhci.h                           |   4 +
>>  drivers/soc/tegra/pmc.c                            | 511 ++++++++++++++-----
>>  include/dt-bindings/pinctrl/pinctrl-tegra-io-pad.h |  18 +
>>  include/soc/tegra/pmc.h                            |  20 +-
>>  13 files changed, 1324 insertions(+), 212 deletions(-)
>>  create mode 100644 include/dt-bindings/pinctrl/pinctrl-tegra-io-pad.h
> 
> Adrian,
> 
> these patches are also a prerequisite for the UHS signalling changes in
> the other two series that Aapo posted. It'd be great if you could take a
> quick look and weigh in.

Sure, I'll try and have a look today.