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dt-bindings: mmc: add bindings for hi3798cv200-dw-mshc 

Hisilicon hi3798cv200 SoC extends the dw-mshc controller
for additional clock control. Add device tree bindings for
hi3798cv200-dw-mshc.

Signed-off-by: tianshuliang <tianshuliang@hisilicon.com>
Signed-off-by: Jiancheng Xue <xuejiancheng@hisilicon.com>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
tianshuliang 2018-03-08 09:01:33 +08:00 committed by Ulf Hansson
parent 974e85e90c
commit 8a9cdf9852
1 changed files with 40 additions and 0 deletions
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Documentation/devicetree/bindings/mmc/hi3798cv200-dw-mshc.txt Normal file
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* Hisilicon Hi3798CV200 specific extensions to the Synopsys Designware Mobile
Storage Host Controller
Read synopsys-dw-mshc.txt for more details
The Synopsys designware mobile storage host controller is used to interface
a SoC with storage medium such as eMMC or SD/MMC cards. This file documents
differences between the core Synopsys dw mshc controller properties described
by synopsys-dw-mshc.txt and the properties used by the Hisilicon Hi3798CV200
specific extensions to the Synopsys Designware Mobile Storage Host Controller.
Required Properties:
- compatible: Should contain "hisilicon,hi3798cv200-dw-mshc".
- clocks: A list of phandle + clock-specifier pairs for the clocks listed
in clock-names.
- clock-names: Should contain the following:
"ciu" - The ciu clock described in synopsys-dw-mshc.txt.
"biu" - The biu clock described in synopsys-dw-mshc.txt.
"ciu-sample" - Hi3798CV200 extended phase clock for ciu sampling.
"ciu-drive" - Hi3798CV200 extended phase clock for ciu driving.
Example:
emmc: mmc@9830000 {
compatible = "hisilicon,hi3798cv200-dw-mshc";
reg = <0x9830000 0x10000>;
interrupts = <GIC_SPI 35 IRQ_TYPE_LEVEL_HIGH>;
clocks = <&crg HISTB_MMC_CIU_CLK>,
<&crg HISTB_MMC_BIU_CLK>,
<&crg HISTB_MMC_SAMPLE_CLK>,
<&crg HISTB_MMC_DRV_CLK>;
clock-names = "ciu", "biu", "ciu-sample", "ciu-drive";
fifo-depth = <256>;
clock-frequency = <200000000>;
cap-mmc-highspeed;
mmc-ddr-1_8v;
mmc-hs200-1_8v;
non-removable;
bus-width = <8>;
};