44 lines
1.6 KiB
Plaintext
44 lines
1.6 KiB
Plaintext
|
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
|
||
|
|
- ti,otap-del-sel: Output Tap Delay select
|
||
|
|
|
||
|
|
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 = <0x2>;
|
||
|
|
ti,trm-icp = <0x8>;
|
||
|
|
};
|