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| author |   Kishon Vijay Abraham I <kishon@ti.com> | 2017-08-21 13:11:29 +0530 |
|---|---|---|
| committer |   Ulf Hansson <ulf.hansson@linaro.org> | 2017-08-30 15:03:43 +0200 |
| commit | 1284c248d145926760eab7244252f695f7a7a46a (patch) | |
| tree | 09d82807025be0485a457358146861a2daf8163f /drivers/mmc/host/sdhci.c | |
| parent | mmc: sdhci: Tidy reading 136-bit responses (diff) | |
| download | linux-dev-1284c248d145926760eab7244252f695f7a7a46a.tar.xz linux-dev-1284c248d145926760eab7244252f695f7a7a46a.zip | |
mmc: sdhci: Add quirk to indicate MMC_RSP_136 has CRC
TI's implementation of sdhci controller used in DRA7 SoC's has
CRC in responses with length 136 bits. Add quirk to indicate
the controller has CRC in MMC_RSP_136. If this quirk is
set sdhci library shouldn't shift the response present in
SDHCI_RESPONSE register.
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc/host/sdhci.c')
| -rw-r--r-- | drivers/mmc/host/sdhci.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c index 1cea35d8bc79..0d5fcca18c9e 100644 --- a/drivers/mmc/host/sdhci.c +++ b/drivers/mmc/host/sdhci.c @@ -1182,6 +1182,9 @@ static void sdhci_read_rsp_136(struct sdhci_host *host, struct mmc_command *cmd) cmd->resp[i] = sdhci_readl(host, reg); } + if (host->quirks2 & SDHCI_QUIRK2_RSP_136_HAS_CRC) + return; + /* CRC is stripped so we need to do some shifting */ for (i = 0; i < 4; i++) { cmd->resp[i] <<= 8; |