Commit 2fdb6e2d authored by Guennadi Liakhovetski's avatar Guennadi Liakhovetski Committed by Chris Ball
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mmc: add DT bindings for more MMC capability flags 



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: default avatarGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: default avatarChris Ball <cjb@laptop.org>
parent 619b08d4

Documentation/devicetree/bindings/mmc/mmc.txt

+4 −0
Original line number Diff line number Diff line
@@ -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"

drivers/mmc/core/host.c

+13 −0
Original line number Diff line number Diff line
@@ -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);

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