mmc: core: Add support for HS400
HS400 is a new bus speed mode introduced in eMMC5.0 specification. This
patch adds the capability in mmc core to switch to HS400 mode when both
the host and the card supports it.
Signed-off-by: Venkat Gopalakrishnan <venkatg@codeaurora.org>
diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h
index 5796b9d..e1dbd21 100644
--- a/include/linux/mmc/host.h
+++ b/include/linux/mmc/host.h
@@ -61,6 +61,7 @@
#define MMC_TIMING_UHS_SDR104 4
#define MMC_TIMING_UHS_DDR50 5
#define MMC_TIMING_MMC_HS200 6
+#define MMC_TIMING_MMC_HS400 7
#define MMC_SDR_MODE 0
#define MMC_1_2V_DDR_MODE 1
@@ -296,6 +297,11 @@
#define MMC_CAP2_CORE_RUNTIME_PM (1 << 19)
/* Allows Asynchronous SDIO irq while card is in 4-bit mode */
#define MMC_CAP2_ASYNC_SDIO_IRQ_4BIT_MODE (1 << 20)
+
+#define MMC_CAP2_HS400_1_8V (1 << 21) /* can support */
+#define MMC_CAP2_HS400_1_2V (1 << 22) /* can support */
+#define MMC_CAP2_HS400 (MMC_CAP2_HS400_1_8V | \
+ MMC_CAP2_HS400_1_2V)
mmc_pm_flag_t pm_caps; /* supported pm features */
int clk_requests; /* internal reference counter */