Commit d7f0570d authored by Chunyan Zhang's avatar Chunyan Zhang Committed by Ulf Hansson
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dt-bindings: sdhci-sprd: Add bindings for the sdhci-sprd controller



This patch adds the device-tree binding documentation for Spreadtrum
SDHCI driver.
Signed-off-by: default avatarChunyan Zhang <chunyan.zhang@unisoc.com>
Signed-off-by: default avatarUlf Hansson <ulf.hansson@linaro.org>
parent 7ed71a9d
* Spreadtrum SDHCI controller (sdhci-sprd)
The Secure Digital (SD) Host controller on Spreadtrum SoCs provides an interface
for MMC, SD and SDIO types of cards.
This file documents differences between the core properties in mmc.txt
and the properties used by the sdhci-sprd driver.
Required properties:
- compatible: Should contain "sprd,sdhci-r11".
- reg: physical base address of the controller and length.
- interrupts: Interrupts used by the SDHCI controller.
- clocks: Should contain phandle for the clock feeding the SDHCI controller
- clock-names: Should contain the following:
"sdio" - SDIO source clock (required)
"enable" - gate clock which used for enabling/disabling the device (required)
Optional properties:
- assigned-clocks: the same with "sdio" clock
- assigned-clock-parents: the default parent of "sdio" clock
Examples:
sdio0: sdio@20600000 {
compatible = "sprd,sdhci-r11";
reg = <0 0x20600000 0 0x1000>;
interrupts = <GIC_SPI 60 IRQ_TYPE_LEVEL_HIGH>;
clock-names = "sdio", "enable";
clocks = <&ap_clk CLK_EMMC_2X>,
<&apahb_gate CLK_EMMC_EB>;
assigned-clocks = <&ap_clk CLK_EMMC_2X>;
assigned-clock-parents = <&rpll CLK_RPLL_390M>;
bus-width = <8>;
non-removable;
no-sdio;
no-sd;
cap-mmc-hw-reset;
status = "okay";
};
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