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mmc: add DT bindings for more MMC capability flags

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Many MMC capability flags are platform-dependent and are traditionally set
in platform data. With DT often each such capability requires a special
binding. Add bindings for MMC_CAP_SD_HIGHSPEED, MMC_CAP_MMC_HIGHSPEED,
MMC_CAP_POWER_OFF_CARD and MMC_CAP_SDIO_IRQ capabilities. Also add code to
DT parser to look up "keep-power-in-suspend" and "enable-sdio-wakeup"
bindings and set MMC_PM_KEEP_POWER and MMC_PM_WAKE_SDIO_IRQ respectively,
if found.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Chris Ball <cjb@laptop.org>
This commit is contained in:
Guennadi Liakhovetski 2013-02-15 16:14:01 +01:00 committed by Chris Ball
parent 619b08d45a
commit 2fdb6e2d9b
2 changed files with 17 additions and 0 deletions
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4
Documentation/devicetree/bindings/mmc/mmc.txt
View File

@ -24,6 +24,10 @@ Optional properties:
- max-frequency: maximum operating clock frequency
- no-1-8-v: when present, denotes that 1.8v card voltage is not supported on
this system, even if the controller claims it is.
- cap-sd-highspeed: SD high-speed timing is supported
- cap-mmc-highspeed: MMC high-speed timing is supported
- cap-power-off-card: powering off the card is safe
- cap-sdio-irq: enable SDIO IRQ signalling on this interface
*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"

13
drivers/mmc/core/host.c
View File

@ -400,6 +400,19 @@ void mmc_of_parse(struct mmc_host *host)
}
if (explicit_inv_wp ^ gpio_inv_wp)
host->caps2 |= MMC_CAP2_RO_ACTIVE_HIGH;
if (of_find_property(np, "cap-sd-highspeed", &len))
host->caps |= MMC_CAP_SD_HIGHSPEED;
if (of_find_property(np, "cap-mmc-highspeed", &len))
host->caps |= MMC_CAP_MMC_HIGHSPEED;
if (of_find_property(np, "cap-power-off-card", &len))
host->caps |= MMC_CAP_POWER_OFF_CARD;
if (of_find_property(np, "cap-sdio-irq", &len))
host->caps |= MMC_CAP_SDIO_IRQ;
if (of_find_property(np, "keep-power-in-suspend", &len))
host->pm_caps |= MMC_PM_KEEP_POWER;
if (of_find_property(np, "enable-sdio-wakeup", &len))
host->pm_caps |= MMC_PM_WAKE_SDIO_IRQ;
}
EXPORT_SYMBOL(mmc_of_parse);