* STMicroelectronics sdhci-st MMC/SD controller
|
|
This file documents the differences between the core properties in
|
Documentation/devicetree/bindings/mmc/mmc.txt and the properties
|
used by the sdhci-st driver.
|
|
Required properties:
|
- compatible: Must be "st,sdhci" and it can be compatible to "st,sdhci-stih407"
|
to set the internal glue logic used for configuring the MMC
|
subsystem (mmcss) inside the FlashSS (available in STiH407 SoC
|
family).
|
|
- clock-names: Should be "mmc" and "icn". (NB: The latter is not compulsory)
|
See: Documentation/devicetree/bindings/resource-names.txt
|
- clocks: Phandle to the clock.
|
See: Documentation/devicetree/bindings/clock/clock-bindings.txt
|
|
- interrupts: One mmc interrupt should be described here.
|
- interrupt-names: Should be "mmcirq".
|
|
- pinctrl-names: A pinctrl state names "default" must be defined.
|
- pinctrl-0: Phandle referencing pin configuration of the sd/emmc controller.
|
See: Documentation/devicetree/bindings/pinctrl/pinctrl-bindings.txt
|
|
- reg: This must provide the host controller base address and it can also
|
contain the FlashSS Top register for TX/RX delay used by the driver
|
to configure DLL inside the flashSS, if so reg-names must also be
|
specified.
|
|
Optional properties:
|
- reg-names: Should be "mmc" and "top-mmc-delay". "top-mmc-delay" is optional
|
for eMMC on stih407 family silicon to configure DLL inside FlashSS.
|
|
- non-removable: Non-removable slot. Also used for configuring mmcss in STiH407 SoC
|
family.
|
See: Documentation/devicetree/bindings/mmc/mmc.txt.
|
|
- bus-width: Number of data lines.
|
See: Documentation/devicetree/bindings/mmc/mmc.txt.
|
|
- max-frequency: Can be 200MHz, 100MHz or 50MHz (default) and used for
|
configuring the CCONFIG3 in the mmcss.
|
See: Documentation/devicetree/bindings/mmc/mmc.txt.
|
|
- resets: Phandle and reset specifier pair to softreset line of HC IP.
|
See: Documentation/devicetree/bindings/reset/reset.txt
|
|
- vqmmc-supply: Phandle to the regulator dt node, mentioned as the vcc/vdd
|
supply in eMMC/SD specs.
|
|
- sd-uhs-sdr50: To enable the SDR50 in the mmcss.
|
See: Documentation/devicetree/bindings/mmc/mmc.txt.
|
|
- sd-uhs-sdr104: To enable the SDR104 in the mmcss.
|
See: Documentation/devicetree/bindings/mmc/mmc.txt.
|
|
- sd-uhs-ddr50: To enable the DDR50 in the mmcss.
|
See: Documentation/devicetree/bindings/mmc/mmc.txt.
|
|
Example:
|
|
/* Example stih416e eMMC configuration */
|
|
mmc0: sdhci@fe81e000 {
|
compatible = "st,sdhci";
|
reg = <0xfe81e000 0x1000>;
|
interrupts = <GIC_SPI 127 IRQ_TYPE_NONE>;
|
interrupt-names = "mmcirq";
|
pinctrl-names = "default";
|
pinctrl-0 = <&pinctrl_mmc0>;
|
clock-names = "mmc";
|
clocks = <&clk_s_a1_ls 1>;
|
bus-width = <8>
|
|
/* Example SD stih407 family configuration */
|
|
mmc1: sdhci@9080000 {
|
compatible = "st,sdhci-stih407", "st,sdhci";
|
reg = <0x09080000 0x7ff>;
|
reg-names = "mmc";
|
interrupts = <GIC_SPI 90 IRQ_TYPE_NONE>;
|
interrupt-names = "mmcirq";
|
pinctrl-names = "default";
|
pinctrl-0 = <&pinctrl_sd1>;
|
clock-names = "mmc";
|
clocks = <&clk_s_c0_flexgen CLK_MMC_1>;
|
resets = <&softreset STIH407_MMC1_SOFTRESET>;
|
bus-width = <4>;
|
};
|
|
/* Example eMMC stih407 family configuration */
|
|
mmc0: sdhci@9060000 {
|
compatible = "st,sdhci-stih407", "st,sdhci";
|
reg = <0x09060000 0x7ff>, <0x9061008 0x20>;
|
reg-names = "mmc", "top-mmc-delay";
|
interrupts = <GIC_SPI 92 IRQ_TYPE_NONE>;
|
interrupt-names = "mmcirq";
|
pinctrl-names = "default";
|
pinctrl-0 = <&pinctrl_mmc0>;
|
clock-names = "mmc";
|
clocks = <&clk_s_c0_flexgen CLK_MMC_0>;
|
vqmmc-supply = <&vmmc_reg>;
|
max-frequency = <200000000>;
|
bus-width = <8>;
|
non-removable;
|
sd-uhs-sdr50;
|
sd-uhs-sdr104;
|
sd-uhs-ddr50;
|
};
|
