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| author |   Lars-Peter Clausen <lars@metafoo.de> | 2015-05-06 20:31:20 +0200 |
|---|---|---|
| committer |   Ulf Hansson <ulf.hansson@linaro.org> | 2015-06-01 09:07:00 +0200 |
| commit | 19f4424677455a01b93163975cfbcffa9adb3336 (patch) | |
| tree | 995b9643e6ac498a8d9991e6df13bd2cf6db05e3 /drivers/mmc | |
| parent | mmc: Add support for disabling write-protect detection (diff) | |
| download | linux-dev-19f4424677455a01b93163975cfbcffa9adb3336.tar.xz linux-dev-19f4424677455a01b93163975cfbcffa9adb3336.zip | |
mmc: dt: Allow to specify that no write protect signal is present
Allow to specify in the device-tree that no physical write-protect signal
is connected to a particular instance of a MMC controller. Setting the
property will cause the core will assume that the SD card is always
read-write.
The name for the new property is 'disable-wp' and was chosen based on the
property with the same function from the Synopsys designware mobile storage
host controller DT bindings specification.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: Pawel Moll <pawel.moll@arm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Ian Campbell <ijc+devicetree@hellion.org.uk>
Cc: Kumar Gala <galak@codeaurora.org>
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 86c495b7a335..99a9c9011c50 100644 --- a/drivers/mmc/core/host.c +++ b/drivers/mmc/core/host.c @@ -484,6 +484,9 @@ int mmc_of_parse(struct mmc_host *host) else if (ret != -ENOENT) return ret; + if (of_property_read_bool(np, "disable-wp")) + host->caps2 |= MMC_CAP2_NO_WRITE_PROTECT; + /* See the comment on CD inversion above */ if (ro_cap_invert ^ ro_gpio_invert) host->caps2 |= MMC_CAP2_RO_ACTIVE_HIGH; |