Currently there is no proper way to define that a MMC host supports only 3.3V. The property no-1-8-v is broken and has different meanings for different sdhci variants. So add a new property for 3.3V only support and mark no-1-8-v as deprecated. Signed-off-by: Stefan Wahren <stefan.wahren@xxxxxxxx> --- Documentation/devicetree/bindings/mmc/mmc.txt | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/Documentation/devicetree/bindings/mmc/mmc.txt b/Documentation/devicetree/bindings/mmc/mmc.txt index 22d1e1f..b2b8960 100644 --- a/Documentation/devicetree/bindings/mmc/mmc.txt +++ b/Documentation/devicetree/bindings/mmc/mmc.txt @@ -27,8 +27,6 @@ Optional properties: logic it is sufficient to not specify wp-gpios property in the absence of a WP line. - 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 - sd-uhs-sdr12: SD UHS SDR12 speed is supported @@ -40,6 +38,7 @@ Optional properties: - cap-mmc-hw-reset: eMMC hardware reset is supported - cap-sdio-irq: enable SDIO IRQ signalling on this interface - full-pwr-cycle: full power cycle of the card is supported +- mmc-ddr-3_3v: eMMC high-speed DDR mode(3.3V I/O) is supported - mmc-ddr-1_8v: eMMC high-speed DDR mode(1.8V I/O) is supported - mmc-ddr-1_2v: eMMC high-speed DDR mode(1.2V I/O) is supported - mmc-hs200-1_8v: eMMC HS200 mode(1.8V I/O) is supported @@ -53,6 +52,10 @@ Optional properties: - no-sd: controller is limited to send sd cmd during initialization - no-mmc: controller is limited to send mmc cmd during initialization +Deprecated properties: +- 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. + *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" line levels. We choose to follow the SDHCI standard, which specifies both those -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
