From 19b7f796c375a8098924717b171ac5058129d2c4 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?David=20Lanzend=C3=B6rfer?= Date: Mon, 12 May 2014 14:04:48 +0200 Subject: mmc: sunxi: Add driver for SD/MMC hosts found on Allwinner sunxi SoCs MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The Allwinner sunxi mmc host uses dma in bus-master mode using a built-in designware idmac controller, which is identical to the one found in the mmc-dw hosts. However the rest of the host is not identical to mmc-dw, it deals with sending stop commands in hardware which makes it significantly different from the mmc-dw devices. Signed-off-by: David Lanzendörfer [hdegoede@redhat.com: various cleanups and fixes] Signed-off-by: Hans de Goede Acked-by: Maxime Ripard Acked-by: Arnd Bergmann Signed-off-by: Ulf Hansson Signed-off-by: Chris Ball --- .../devicetree/bindings/mmc/sunxi-mmc.txt | 43 ++++++++++++++++++++++ 1 file changed, 43 insertions(+) create mode 100644 Documentation/devicetree/bindings/mmc/sunxi-mmc.txt (limited to 'Documentation') diff --git a/Documentation/devicetree/bindings/mmc/sunxi-mmc.txt b/Documentation/devicetree/bindings/mmc/sunxi-mmc.txt new file mode 100644 index 000000000000..91b3a3467150 --- /dev/null +++ b/Documentation/devicetree/bindings/mmc/sunxi-mmc.txt @@ -0,0 +1,43 @@ +* Allwinner sunxi MMC controller + +The highspeed MMC host controller on Allwinner SoCs provides an interface +for MMC, SD and SDIO types of memory cards. + +Supported maximum speeds are the ones of the eMMC standard 4.5 as well +as the speed of SD standard 3.0. +Absolute maximum transfer rate is 200MB/s + +Required properties: + - compatible : "allwinner,sun4i-a10-mmc" or "allwinner,sun5i-a13-mmc" + - reg : mmc controller base registers + - clocks : a list with 2 phandle + clock specifier pairs + - clock-names : must contain "ahb" and "mmc" + - interrupts : mmc controller interrupt + +Optional properties: + - resets : phandle + reset specifier pair + - reset-names : must contain "ahb" + - for cd, bus-width and additional generic mmc parameters + please refer to mmc.txt within this directory + +Examples: + - Within .dtsi: + mmc0: mmc@01c0f000 { + compatible = "allwinner,sun5i-a13-mmc"; + reg = <0x01c0f000 0x1000>; + clocks = <&ahb_gates 8>, <&mmc0_clk>; + clock-names = "ahb", "mod"; + interrupts = <0 32 4>; + status = "disabled"; + }; + + - Within dts: + mmc0: mmc@01c0f000 { + pinctrl-names = "default", "default"; + pinctrl-0 = <&mmc0_pins_a>; + pinctrl-1 = <&mmc0_cd_pin_reference_design>; + bus-width = <4>; + cd-gpios = <&pio 7 1 0>; /* PH1 */ + cd-inverted; + status = "okay"; + }; -- cgit v1.2.3