diff options
| author | Vincent Yang | 2015-01-20 16:05:16 +0800 |
|---|---|---|
| committer | Ulf Hansson | 2015-01-20 09:29:16 +0100 |
| commit | 67d0d04a762db4bd610fd628ad683b5d7dc905e7 (patch) | |
| tree | 74a3eed2bb5f6e5643ee445b28e8a871aa3f22f1 | |
| parent | 9d967a61b4fc77b12f4b038a9345b5cda5bb2a7a (diff) | |
mmc: sdhci: add a quirk for tuning work around
This patch defines a quirk for tuning work
around for some sdhci host controller. It sets
both SDHCI_CTRL_EXEC_TUNING and SDHCI_CTRL_TUNED_CLK
for tuning.
It is a preparation and will be used by Fujitsu
SDHCI controller f_sdh30 driver.
Signed-off-by: Vincent Yang <Vincent.Yang@tw.fujitsu.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
| -rw-r--r-- | drivers/mmc/host/sdhci.c | 2 | ||||
| -rw-r--r-- | include/linux/mmc/sdhci.h | 2 |
2 files changed, 4 insertions, 0 deletions
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c index 3e4fe967d7e5..a3ecd20e5510 100644 --- a/drivers/mmc/host/sdhci.c +++ b/drivers/mmc/host/sdhci.c @@ -1961,6 +1961,8 @@ static int sdhci_execute_tuning(struct mmc_host *mmc, u32 opcode) ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2); ctrl |= SDHCI_CTRL_EXEC_TUNING; + if (host->quirks2 & SDHCI_QUIRK2_TUNING_WORK_AROUND) + ctrl |= SDHCI_CTRL_TUNED_CLK; sdhci_writew(host, ctrl, SDHCI_HOST_CONTROL2); /* diff --git a/include/linux/mmc/sdhci.h b/include/linux/mmc/sdhci.h index cb8b94ff6a26..933b897ca095 100644 --- a/include/linux/mmc/sdhci.h +++ b/include/linux/mmc/sdhci.h @@ -111,6 +111,8 @@ struct sdhci_host { #define SDHCI_QUIRK2_CLEAR_TRANSFERMODE_REG_BEFORE_CMD (1<<10) /* Capability register bit-63 indicates HS400 support */ #define SDHCI_QUIRK2_CAPS_BIT63_FOR_HS400 (1<<11) +/* forced tuned clock */ +#define SDHCI_QUIRK2_TUNING_WORK_AROUND (1<<12) int irq; /* Device IRQ */ void __iomem *ioaddr; /* Mapped address */ |