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authorLudovic Barre <ludovic.barre@st.com>2018-10-08 15:08:49 +0300
committerUlf Hansson <ulf.hansson@linaro.org>2018-10-09 10:13:04 +0300
commitb79220b3e0af5037b2ae90a5d2c32bc1a1e627fb (patch)
treeedb3d648868d3841cce4aa4ffd4988f246c30453 /drivers/mmc/host/mmci.h
parentd2141547f594d396f85010ba0b37d0e9491943b6 (diff)
downloadlinux-b79220b3e0af5037b2ae90a5d2c32bc1a1e627fb.tar.xz
mmc: mmci: add variant property to not read datacnt
This patch adds a boolean property to not read datacnt register. Needed to support the STM32 sdmmc variant. MMCIDATACNT register should be read only after the data transfer is completed. When reading after an error event the read data count value may be different from the real number of data bytes transferred. 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.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/mmc/host/mmci.h b/drivers/mmc/host/mmci.h
index eef7dd5be01d..cdcadd29a10d 100644
--- a/drivers/mmc/host/mmci.h
+++ b/drivers/mmc/host/mmci.h
@@ -224,6 +224,8 @@ struct mmci_host;
* @datactrl_blksz: block size in power of two
* @datactrl_dpsm_enable: enable value for DPSM
* @datactrl_first: true if data must be setup before send command
+ * @datacnt_useless: true if you could not use datacnt register to read
+ * remaining data
* @pwrreg_powerup: power up value for MMCIPOWER register
* @f_max: maximum clk frequency supported by the controller.
* @signal_direction: input/out direction of bus signals can be indicated
@@ -264,6 +266,7 @@ struct variant_data {
unsigned int datactrl_blocksz;
unsigned int datactrl_dpsm_enable;
u8 datactrl_first:1;
+ u8 datacnt_useless:1;
u8 st_sdio:1;
u8 st_clkdiv:1;
u8 blksz_datactrl16:1;