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Documentation: synopsys-dw-mshc: add binding for fifo quirks

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Add fifo-addr property and fifo-watermark-quirk property to
synopsys-dw-mshc bindings. It is intended to provide more
dt interface to support SoCs specific configuration.

Signed-off-by: Jun Nie <jun.nie@linaro.org>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
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Jun Nie 2017-01-06 12:24:42 +08:00 committed by Ulf Hansson
parent b8789ec482
commit 4a80f77618
1 changed files with 13 additions and 0 deletions
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13
Documentation/devicetree/bindings/mmc/synopsys-dw-mshc.txt
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@ -75,6 +75,17 @@ Optional properties:
* card-detect-delay: Delay in milli-seconds before detecting card after card
insert event. The default value is 0.
* data-addr: Override fifo address with value provided by DT. The default FIFO reg
offset is assumed as 0x100 (version < 0x240A) and 0x200(version >= 0x240A) by
driver. If the controller does not follow this rule, please use this property
to set fifo address in device tree.
* fifo-watermark-aligned: Data done irq is expected if data length is less than
watermark in PIO mode. But fifo watermark is requested to be aligned with data
length in some SoC so that TX/RX irq can be generated with data done irq. Add this
watermark quirk to mark this requirement and force fifo watermark setting
accordingly.
* vmmc-supply: The phandle to the regulator to use for vmmc. If this is
specified we'll defer probe until we can find this regulator.
@ -102,6 +113,8 @@ board specific portions as listed below.
interrupts = <0 75 0>;
#address-cells = <1>;
#size-cells = <0>;
data-addr = <0x200>;
fifo-watermark-aligned;
resets = <&rst 20>;
reset-names = "reset";
};