diff options
| author |   Lucas Stach <dev@lynxeye.de> | 2021-05-10 21:04:00 +0200 |
|---|---|---|
| committer |   Ulf Hansson <ulf.hansson@linaro.org> | 2021-06-14 13:57:39 +0200 |
| commit | f722e650d965307f8c4c24cf4edc166b6abe9dc6 (patch) | |
| tree | 1f0fef0dacda31e9ea52b2ba93e95621e0be0d36 /drivers/mmc | |
| parent | mmc: sdhci-esdhc-imx: advertise HS400 mode through MMC caps (diff) | |
| download | linux-dev-f722e650d965307f8c4c24cf4edc166b6abe9dc6.tar.xz linux-dev-f722e650d965307f8c4c24cf4edc166b6abe9dc6.zip | |
mmc: core: add support for disabling HS400 mode via DT
On some boards the data strobe line isn't wired up, rendering HS400
support broken, even if both the controller and the eMMC claim to
support it. Allow to disable HS400 mode via DT.
Signed-off-by: Lucas Stach <dev@lynxeye.de>
Link: https://lore.kernel.org/r/20210510190400.105162-3-l.stach@pengutronix.de
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc')
| -rw-r--r-- | drivers/mmc/core/host.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/mmc/core/host.c b/drivers/mmc/core/host.c index 0b0577990ddc..eda4a1892c33 100644 --- a/drivers/mmc/core/host.c +++ b/drivers/mmc/core/host.c @@ -388,6 +388,9 @@ int mmc_of_parse(struct mmc_host *host) host->caps2 |= MMC_CAP2_NO_SD; if (device_property_read_bool(dev, "no-mmc")) host->caps2 |= MMC_CAP2_NO_MMC; + if (device_property_read_bool(dev, "no-mmc-hs400")) + host->caps2 &= ~(MMC_CAP2_HS400_1_8V | MMC_CAP2_HS400_1_2V | + MMC_CAP2_HS400_ES); /* Must be after "non-removable" check */ if (device_property_read_u32(dev, "fixed-emmc-driver-type", &drv_type) == 0) { |