[U-Boot] [PATCH v4 1/1] mmc: Add MMC support for stm32h7 Socs
sjg at chromium.org
Sun Aug 13 21:37:04 UTC 2017
On 11 August 2017 at 08:35, <patrice.chotard at st.com> wrote:
> From: Patrice Chotard <patrice.chotard at 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.kerello at st.com>
> Signed-off-by: Patrice Chotard <patrice.chotard at st.com>
> v4: _ replace mmc_create() usage by mmc_bind() callback
> _ rename struct stm32_sdmmc2_host to stm32_sdmmc2_priv
> v3: _ use registers offset instead of registers struct description
> _ rename clk_reg_add and pwr_reg_add to respectively clk_reg_msk and pwr_reg_msk
> _ don't exit in error if DT bus-width value is not correct, force it to 1
> and continue
> v2: _ add .get_cd() callback support
> drivers/mmc/Kconfig | 8 +
> drivers/mmc/Makefile | 1 +
> drivers/mmc/stm32_sdmmc2.c | 601 +++++++++++++++++++++++++++++++++++++++++++++
> 3 files changed, 610 insertions(+)
> create mode 100644 drivers/mmc/stm32_sdmmc2.c
Reviewed-by: Simon Glass <sjg at chromium.org>
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