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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 one of:
"ti,am654-sdhci-5.1": SDHCI on AM654 device.
"ti,j721e-sdhci-8bit": 8 bit SDHCI on J721E device.
"ti,j721e-sdhci-4bit": 4 bit SDHCI on J721E device.
- 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
Output tap delay for each speed mode:
- ti,otap-del-sel-legacy
- ti,otap-del-sel-mmc-hs
- ti,otap-del-sel-sd-hs
- ti,otap-del-sel-sdr12
- ti,otap-del-sel-sdr25
- ti,otap-del-sel-sdr50
- ti,otap-del-sel-sdr104
- ti,otap-del-sel-ddr50
- ti,otap-del-sel-ddr52
- ti,otap-del-sel-hs200
- ti,otap-del-sel-hs400
These bindings must be provided otherwise the driver will disable the
corresponding speed mode (i.e. all nodes must provide at least -legacy)
Optional Properties (Required for ti,am654-sdhci-5.1 and ti,j721e-sdhci-8bit):
- ti,trm-icp: DLL trim select
- ti,driver-strength-ohm: driver strength in ohms.
Valid values are 33, 40, 50, 66 and 100 ohms.
Optional Properties:
- ti,strobe-sel: strobe select delay for HS400 speed mode. Default value: 0x0.
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-legacy = <0x0>;
ti,otap-del-sel-mmc-hs = <0x0>;
ti,otap-del-sel-ddr52 = <0x5>;
ti,otap-del-sel-hs200 = <0x5>;
ti,otap-del-sel-hs400 = <0x0>;
ti,trm-icp = <0x8>;
};
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