Hi Patrice,
On 20 July 2017 at 02:34, patrice.chotard@st.com wrote:
From: Patrice Chotard patrice.chotard@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@st.com Signed-off-by: Patrice Chotard patrice.chotard@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 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 | 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?
helpThis 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.endif
Regards, Simon