diff options
| author | Ludovic Barre <ludovic.barre@st.com> | 2019-10-08 12:56:04 +0300 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2019-11-13 18:10:16 +0300 |
| commit | 0e68de6aa7b10eaaf8603d0e38aac62987f90682 (patch) | |
| tree | 59621efd96c00a8445825577f740c2acad6f9920 /drivers/mmc/host/mmci.h | |
| parent | cb0335b778c7c12a96c4360068ed344a79ea88a2 (diff) | |
| download | linux-0e68de6aa7b10eaaf8603d0e38aac62987f90682.tar.xz | |
mmc: mmci: sdmmc: add busy_complete callback
This patch adds a specific busy_complete callback for sdmmc variant.
sdmmc has 2 status flags:
-busyd0: This is a hardware status flag (inverted value of d0 line).
it does not generate an interrupt.
-busyd0end: This indicates only end of busy following a CMD response.
On busy to Not busy changes, an interrupt is generated (if unmask)
and BUSYD0END status flag is set. Status flag is cleared by writing
corresponding interrupt clear bit in MMCICLEAR.
The legacy busy completion has no dedicated interrupt for the end
of busy, so it's must monitor step by step the busy progression.
On sdmmc variant, this procedure is not needed, it's just need
to wait the busyd0end interrupt.
Signed-off-by: Ludovic Barre <ludovic.barre@st.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc/host/mmci.h')
| -rw-r--r-- | drivers/mmc/host/mmci.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/mmc/host/mmci.h b/drivers/mmc/host/mmci.h index 2a0b98f98c36..158e1231aa23 100644 --- a/drivers/mmc/host/mmci.h +++ b/drivers/mmc/host/mmci.h @@ -164,6 +164,7 @@ #define MCI_ST_CARDBUSY (1 << 24) /* Extended status bits for the STM32 variants */ #define MCI_STM32_BUSYD0 BIT(20) +#define MCI_STM32_BUSYD0END BIT(21) #define MMCICLEAR 0x038 #define MCI_CMDCRCFAILCLR (1 << 0) |