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dt-bindings: mmc: sdhci-am654: Document bindings for the host controllers on TI's AM654 SOCs

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Add binding documentation for mmc host controllers present on TI's AM654
SOCs.

Signed-off-by: Faiz Abbas <faiz_abbas@ti.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
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Faiz Abbas 2018-12-11 00:05:05 +05:30 committed by Ulf Hansson
parent 6809a5f736
commit f98b4f98bb
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Documentation/devicetree/bindings/mmc/sdhci-am654.txt Normal file
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Device Tree Bindings for the SDHCI Controllers present on TI's AM654 SOCs
The bindings follow the mmc[1], clock[2] and interrupt[3] bindings.
Only deviations are documented here.
[1] Documentation/devicetree/bindings/mmc/mmc.txt
[2] Documentation/devicetree/bindings/clock/clock-bindings.txt
[3] Documentation/devicetree/bindings/interrupt-controller/interrupts.txt
Required Properties:
- compatible: should be "ti,am654-sdhci-5.1"
- reg: Must be two entries.
- The first should be the sdhci register space
- The second should the subsystem/phy register space
- clocks: Handles to the clock inputs.
- clock-names: Tuple including "clk_xin" and "clk_ahb"
- interrupts: Interrupt specifiers
- ti,otap-del-sel: Output Tap Delay select
- ti,trm-icp: DLL trim select
- ti,driver-strength-ohm: driver strength in ohms.
Valid values are 33, 40, 50, 66 and 100 ohms.
Example:
sdhci0: sdhci@4f80000 {
compatible = "ti,am654-sdhci-5.1";
reg = <0x0 0x4f80000 0x0 0x260>, <0x0 0x4f90000 0x0 0x134>;
power-domains = <&k3_pds 47>;
clocks = <&k3_clks 47 0>, <&k3_clks 47 1>;
clock-names = "clk_ahb", "clk_xin";
interrupts = <GIC_SPI 136 IRQ_TYPE_LEVEL_HIGH>;
sdhci-caps-mask = <0x80000007 0x0>;
mmc-ddr-1_8v;
ti,otap-del-sel = <0x2>;
ti,trm-icp = <0x8>;
};