From fb19fdf48ddc566055e8cd1aeb372299c6ea43e2 Mon Sep 17 00:00:00 2001 From: Masahiro Yamada Date: Thu, 23 Aug 2018 13:44:17 +0900 Subject: dt-bindings: mmc: add DT binding for UniPhier SD/eMMC controller This SD/eMMC controller is used for UniPhier SoC family. Signed-off-by: Masahiro Yamada Reviewed-by: Rob Herring Acked-by: Wolfram Sang Signed-off-by: Ulf Hansson --- .../devicetree/bindings/mmc/uniphier-sd.txt | 55 ++++++++++++++++++++++ 1 file changed, 55 insertions(+) create mode 100644 Documentation/devicetree/bindings/mmc/uniphier-sd.txt (limited to 'Documentation/devicetree/bindings/mmc/uniphier-sd.txt') diff --git a/Documentation/devicetree/bindings/mmc/uniphier-sd.txt b/Documentation/devicetree/bindings/mmc/uniphier-sd.txt new file mode 100644 index 000000000000..e1d658755722 --- /dev/null +++ b/Documentation/devicetree/bindings/mmc/uniphier-sd.txt @@ -0,0 +1,55 @@ +UniPhier SD/eMMC controller + +Required properties: +- compatible: should be one of the following: + "socionext,uniphier-sd-v2.91" - IP version 2.91 + "socionext,uniphier-sd-v3.1" - IP version 3.1 + "socionext,uniphier-sd-v3.1.1" - IP version 3.1.1 +- reg: offset and length of the register set for the device. +- interrupts: a single interrupt specifier. +- clocks: a single clock specifier of the controller clock. +- reset-names: should contain the following: + "host" - mandatory for all versions + "bridge" - should exist only for "socionext,uniphier-sd-v2.91" + "hw" - should exist if eMMC hw reset line is available +- resets: a list of reset specifiers, corresponding to the reset-names + +Optional properties: +- pinctrl-names: if present, should contain the following: + "default" - should exist for all instances + "uhs" - should exist for SD instance with UHS support +- pinctrl-0: pin control state for the default mode +- pinctrl-1: pin control state for the UHS mode +- dma-names: should be "rx-tx" if present. + This property can exist only for "socionext,uniphier-sd-v2.91". +- dmas: a single DMA channel specifier + This property can exist only for "socionext,uniphier-sd-v2.91". +- bus-width: see mmc.txt +- cap-sd-highspeed: see mmc.txt +- cap-mmc-highspeed: see mmc.txt +- sd-uhs-sdr12: see mmc.txt +- sd-uhs-sdr25: see mmc.txt +- sd-uhs-sdr50: see mmc.txt +- cap-mmc-hw-reset: should exist if reset-names contains "hw". see mmc.txt +- non-removable: see mmc.txt + +Example: + + sd: sdhc@5a400000 { + compatible = "socionext,uniphier-sd-v2.91"; + reg = <0x5a400000 0x200>; + interrupts = <0 76 4>; + pinctrl-names = "default", "uhs"; + pinctrl-0 = <&pinctrl_sd>; + pinctrl-1 = <&pinctrl_sd_uhs>; + clocks = <&mio_clk 0>; + reset-names = "host", "bridge"; + resets = <&mio_rst 0>, <&mio_rst 3>; + dma-names = "rx-tx"; + dmas = <&dmac 4>; + bus-width = <4>; + cap-sd-highspeed; + sd-uhs-sdr12; + sd-uhs-sdr25; + sd-uhs-sdr50; + }; -- cgit v1.2.3-59-g8ed1b