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authorSujit Reddy Thumma <sthumma@codeaurora.org>2012-12-04 17:06:19 +0530
committerChris Ball <cjb@laptop.org>2013-02-11 12:51:23 -0500
commit41875e388401ad97c33252d5fa39d52e0b70ee9b (patch)
tree2f76e0c6660f00920589fde0fed7489d30008523 /include/linux
parent51aa66a58494f869f491eedda86c409c50536c14 (diff)
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mmc: sdio: Fix SDIO 3.0 UHS-I initialization sequence
According to UHS-I initialization sequence for SDIO 3.0 cards, the host must set bit[24] (S18R) of OCR register during OCR handshake to know whether the SDIO card is capable of doing 1.8V I/O. Signed-off-by: Sujit Reddy Thumma <sthumma@codeaurora.org> Signed-off-by: Subhash Jadavani <subhashj@codeaurora.org> Reviewed-by: Johan Rudholm <johan.rudholm@stericsson.com> Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by: Chris Ball <cjb@laptop.org>
Diffstat (limited to 'include/linux')
-rw-r--r--include/linux/mmc/host.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h
index 61a10c1..c89a1bb 100644
--- a/include/linux/mmc/host.h
+++ b/include/linux/mmc/host.h
@@ -434,6 +434,14 @@ static inline int mmc_boot_partition_access(struct mmc_host *host)
return !(host->caps2 & MMC_CAP2_BOOTPART_NOACC);
}
+static inline int mmc_host_uhs(struct mmc_host *host)
+{
+ return host->caps &
+ (MMC_CAP_UHS_SDR12 | MMC_CAP_UHS_SDR25 |
+ MMC_CAP_UHS_SDR50 | MMC_CAP_UHS_SDR104 |
+ MMC_CAP_UHS_DDR50);
+}
+
#ifdef CONFIG_MMC_CLKGATE
void mmc_host_clk_hold(struct mmc_host *host);
void mmc_host_clk_release(struct mmc_host *host);