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| author |   Ulf Hansson <ulf.hansson@linaro.org> | 2014-02-14 13:27:08 +0100 |
|---|---|---|
| committer |   Chris Ball <chris@printf.net> | 2014-02-22 13:51:10 -0500 |
| commit | c0baf8485928b2db8a9530672d522d758746a2b6 (patch) | |
| tree | c0bf4982b52ffca8ae77f9a3590f666590438873 | |
| parent | mmc: core: Add DT bindings for SD card's UHS bus speed modes (diff) | |
| download | linux-dev-c0baf8485928b2db8a9530672d522d758746a2b6.tar.xz linux-dev-c0baf8485928b2db8a9530672d522d758746a2b6.zip | |
mmc: core: Add DT bindings for eMMC high-speed DDR 1.8/1.2V
Provide the option to configure these speed modes per host, for those
host driver's that can't distinguish this in runtime.
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Acked-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Chris Ball <chris@printf.net>
| -rw-r--r-- | Documentation/devicetree/bindings/mmc/mmc.txt | 2 | ||||
| -rw-r--r-- | drivers/mmc/core/host.c | 4 |
2 files changed, 6 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/mmc/mmc.txt b/Documentation/devicetree/bindings/mmc/mmc.txt index bd2ce67dbb9e..519d9523a413 100644 --- a/Documentation/devicetree/bindings/mmc/mmc.txt +++ b/Documentation/devicetree/bindings/mmc/mmc.txt @@ -34,6 +34,8 @@ Optional properties: - cap-power-off-card: powering off the card is safe - cap-sdio-irq: enable SDIO IRQ signalling on this interface - full-pwr-cycle: full power cycle of the card is supported +- mmc-highspeed-ddr-1_8v: eMMC high-speed DDR mode(1.8V I/O) is supported +- mmc-highspeed-ddr-1_2v: eMMC high-speed DDR mode(1.2V I/O) is supported *NOTE* on CD and WP polarity. To use common for all SD/MMC host controllers line polarity properties, we have to fix the meaning of the "normal" and "inverted" diff --git a/drivers/mmc/core/host.c b/drivers/mmc/core/host.c index 2644d91fd336..d014127f1043 100644 --- a/drivers/mmc/core/host.c +++ b/drivers/mmc/core/host.c @@ -439,6 +439,10 @@ int mmc_of_parse(struct mmc_host *host) host->pm_caps |= MMC_PM_KEEP_POWER; if (of_find_property(np, "enable-sdio-wakeup", &len)) host->pm_caps |= MMC_PM_WAKE_SDIO_IRQ; + if (of_find_property(np, "mmc-ddr-1_8v", &len)) + host->caps |= MMC_CAP_1_8V_DDR; + if (of_find_property(np, "mmc-ddr-1_2v", &len)) + host->caps |= MMC_CAP_1_2V_DDR; return 0; |