On 08/06/2017 07:15 AM, Simon Glass wrote:
> Hi Patrice,
> On 20 July 2017 at 02:34, <patrice.chot...@st.com> wrote:
>> From: Patrice Chotard <patrice.chot...@st.com>
>> This patch adds SD/MMC support for STM32H7 SoCs.
>> Here is an extraction of SDMMC main features, embedded in
>> STM32H7 SoCs.
>> The SD/MMC block include the following:
>> _ Full compliance with MultiMediaCard System Specification
>> Version 4.51. Card support for three different databus modes:
>> 1-bit (default), 4-bit and 8-bit.
>> _ Full compatibility with previous versions of MultiMediaCards
>> (backward compatibility).
>> _ Full compliance with SD memory card specifications version 4.1.
>> (SDR104 SDMMC_CK speed limited to maximum allowed IO speed,
>> SPI mode and UHS-II mode not supported).
>> _ Full compliance with SDIO card specification version 4.0.
>> Card support for two different databus modes: 1-bit (default)
>> and 4-bit. (SDR104 SDMMC_CK speed limited to maximum allowed IO
>> speed, SPI mode and UHS-II mode not supported).
>> _ Data transfer up to 208 Mbyte/s for the 8 bit mode.
>> (depending maximum allowed IO speed).
>> _ Data and command output enable signals to control external
>> bidirectional drivers.
>> The current version of the SDMMC supports only one SD/SDIO/MMC card
>> at any one time and a stack of MMC Version 4.51 or previous.
>> Signed-off-by: Christophe Kerello <christophe.kere...@st.com>
>> Signed-off-by: Patrice Chotard <patrice.chot...@st.com>
>> v3: _ use registers offset instead of registers struct description
>> _ rename clk_reg_add and pwr_reg_add to respectively clk_reg_msk and
>> _ don't exit in error if DT bus-width value is not correct, force it to
>> and continue
>> v2: _ add .get_cd() callback support
>> drivers/mmc/Kconfig | 8 +
>> drivers/mmc/Makefile | 1 +
>> drivers/mmc/stm32_sdmmc2.c | 598
>> 3 files changed, 607 insertions(+)
>> create mode 100644 drivers/mmc/stm32_sdmmc2.c
>> diff --git a/drivers/mmc/Kconfig b/drivers/mmc/Kconfig
>> index 82b8d75..f2e4c26 100644
>> --- a/drivers/mmc/Kconfig
>> +++ b/drivers/mmc/Kconfig
>> @@ -377,6 +377,14 @@ config GENERIC_ATMEL_MCI
>> the SD Memory Card Specification V2.0, the SDIO V2.0 specification
>> and CE-ATA V1.1.
>> +config STM32_SDMMC2
>> + bool "STMicroelectronics STM32H7 SD/MMC Host Controller support"
>> + depends on DM_MMC && OF_CONTROL && DM_MMC_OPS
> I don't see a call to mmc_bind() anywhere. I'm not sure how this
> driver actually works without that?
We use the mmc_create() API.
>> + help
>> + This selects support for the SD/MMC controller on STM32H7 SoCs.
>> + If you have a board based on such a SoC and with a SD/MMC slot,
>> + say Y or M here.
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