diff options
| author | Shawn Lin <shawn.lin@rock-chips.com> | 2016-05-26 04:56:12 +0300 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2016-07-25 11:34:05 +0300 |
| commit | ef29c0e273b874018f1802d12957d22008138240 (patch) | |
| tree | 94e645eb9bd77e73d4857340395fe3001f1e6499 | |
| parent | a60119ce9434b9c592bf4115fc70fa27fe9f2140 (diff) | |
| download | linux-ef29c0e273b874018f1802d12957d22008138240.tar.xz | |
mmc: core: add mmc-hs400-enhanced-strobe support
This patch introduce mmc-hs400-enhanced-strobe for platforms
which want to enable enhanced strobe function from DT if the
mmc host controller claims to support enhanced strobe.
Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Tested-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
| -rw-r--r-- | drivers/mmc/core/host.c | 2 | ||||
| -rw-r--r-- | include/linux/mmc/host.h | 1 |
2 files changed, 3 insertions, 0 deletions
diff --git a/drivers/mmc/core/host.c b/drivers/mmc/core/host.c index 1be42fab1a30..d7e86f9b3dab 100644 --- a/drivers/mmc/core/host.c +++ b/drivers/mmc/core/host.c @@ -313,6 +313,8 @@ int mmc_of_parse(struct mmc_host *host) host->caps2 |= MMC_CAP2_HS400_1_8V | MMC_CAP2_HS200_1_8V_SDR; if (of_property_read_bool(np, "mmc-hs400-1_2v")) host->caps2 |= MMC_CAP2_HS400_1_2V | MMC_CAP2_HS200_1_2V_SDR; + if (of_property_read_bool(np, "mmc-hs400-enhanced-strobe")) + host->caps2 |= MMC_CAP2_HS400_ES; host->dsr_req = !of_property_read_u32(np, "dsr", &host->dsr); if (host->dsr_req && (host->dsr & ~0xffff)) { diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h index 45cde8cd39f2..b836a271e2df 100644 --- a/include/linux/mmc/host.h +++ b/include/linux/mmc/host.h @@ -302,6 +302,7 @@ struct mmc_host { #define MMC_CAP2_SDIO_IRQ_NOTHREAD (1 << 17) #define MMC_CAP2_NO_WRITE_PROTECT (1 << 18) /* No physical write protect pin, assume that card is always read-write */ #define MMC_CAP2_NO_SDIO (1 << 19) /* Do not send SDIO commands during initialization */ +#define MMC_CAP2_HS400_ES (1 << 20) /* Host supports enhanced strobe */ mmc_pm_flag_t pm_caps; /* supported pm features */ |