diff options
| author |   Sujit Reddy Thumma <sthumma@codeaurora.org> | 2012-12-04 17:06:19 +0530 |
|---|---|---|
| committer |   Chris Ball <cjb@laptop.org> | 2013-02-11 12:51:23 -0500 |
| commit | 41875e388401ad97c33252d5fa39d52e0b70ee9b (patch) | |
| tree | 2f76e0c6660f00920589fde0fed7489d30008523 /include | |
| parent | mmc: sdio: fix resume failure due to lack of CMD52 reset (diff) | |
| download | linux-dev-41875e388401ad97c33252d5fa39d52e0b70ee9b.tar.xz linux-dev-41875e388401ad97c33252d5fa39d52e0b70ee9b.zip | |
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')
| -rw-r--r-- | include/linux/mmc/host.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h index 61a10c17aabd..c89a1bb87fa5 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); |