diff options
| author | Scott Branden <sbranden@broadcom.com> | 2015-02-09 16:06:28 -0800 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2015-03-23 14:13:39 +0100 |
| commit | 3bfa6f030a01870a43e2a0652437a20b59bc3412 (patch) | |
| tree | 1a528b4df9a087251c8058a5ae9af4ddd3b1fb4e | |
| parent | eeed7026b4b2840dcc771c3a23783425b50bd6ef (diff) | |
| download | lwn-3bfa6f030a01870a43e2a0652437a20b59bc3412.tar.gz lwn-3bfa6f030a01870a43e2a0652437a20b59bc3412.zip | |
mmc: sdhci: add quirk for ACMD23 broken
Add quirk to handle broken auto-CMD23.
Some controllers do not respond after the first auto-CMD23 is issued.
This allows CMD23 to still work (mandatory for the faster UHS-I mode)
rather than disabling CMD23 entirely via SDHCI_QUIRK2_HOST_NO_CMD23.
Signed-off by: Corneliu Doban <cdoban@broadcom.com>
Signed-off-by: Scott Branden <sbranden@broadcom.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
| -rw-r--r-- | drivers/mmc/host/sdhci.c | 3 | ||||
| -rw-r--r-- | include/linux/mmc/sdhci.h | 2 |
2 files changed, 4 insertions, 1 deletions
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c index 0ad412a4876f..5cf35e5ae267 100644 --- a/drivers/mmc/host/sdhci.c +++ b/drivers/mmc/host/sdhci.c @@ -3164,7 +3164,8 @@ int sdhci_add_host(struct sdhci_host *host) /* Auto-CMD23 stuff only works in ADMA or PIO. */ if ((host->version >= SDHCI_SPEC_300) && ((host->flags & SDHCI_USE_ADMA) || - !(host->flags & SDHCI_USE_SDMA))) { + !(host->flags & SDHCI_USE_SDMA)) && + !(host->quirks2 & SDHCI_QUIRK2_ACMD23_BROKEN)) { host->flags |= SDHCI_AUTO_CMD23; DBG("%s: Auto-CMD23 available\n", mmc_hostname(mmc)); } else { diff --git a/include/linux/mmc/sdhci.h b/include/linux/mmc/sdhci.h index c3e3db196738..1bafb1e7716e 100644 --- a/include/linux/mmc/sdhci.h +++ b/include/linux/mmc/sdhci.h @@ -115,6 +115,8 @@ struct sdhci_host { #define SDHCI_QUIRK2_TUNING_WORK_AROUND (1<<12) /* disable the block count for single block transactions */ #define SDHCI_QUIRK2_SUPPORT_SINGLE (1<<13) +/* Controller broken with using ACMD23 */ +#define SDHCI_QUIRK2_ACMD23_BROKEN (1<<14) int irq; /* Device IRQ */ void __iomem *ioaddr; /* Mapped address */ |