1* STMicroelectronics sdhci-st MMC/SD controller
2
3This file documents the differences between the core properties in
4Documentation/devicetree/bindings/mmc/mmc.txt and the properties
5used by the sdhci-st driver.
6
7Required properties:
8- compatible:		Must be "st,sdhci" and it can be compatible to "st,sdhci-stih407"
9			to set the internal glue logic used for configuring the MMC
10			subsystem (mmcss) inside the FlashSS (available in STiH407 SoC
11			family).
12
13- clock-names:		Should be "mmc" and "icn".  (NB: The latter is not compulsory)
14			See: Documentation/devicetree/bindings/resource-names.txt
15- clocks:		Phandle to the clock.
16			See: Documentation/devicetree/bindings/clock/clock-bindings.txt
17
18- interrupts:		One mmc interrupt should be described here.
19- interrupt-names:	Should be "mmcirq".
20
21- pinctrl-names:	A pinctrl state names "default" must be defined.
22- pinctrl-0:		Phandle referencing pin configuration of the sd/emmc controller.
23			See: Documentation/devicetree/bindings/pinctrl/pinctrl-bindings.txt
24
25- reg:			This must provide the host controller base address and it can also
26			contain the FlashSS Top register for TX/RX delay used by the driver
27			to configure DLL inside the flashSS, if so reg-names must also be
28			specified.
29
30Optional properties:
31- reg-names:		Should be "mmc" and "top-mmc-delay". "top-mmc-delay" is optional
32			for eMMC on stih407 family silicon to configure DLL inside FlashSS.
33
34- non-removable:	Non-removable slot. Also used for configuring mmcss in STiH407 SoC
35			family.
36			See:  Documentation/devicetree/bindings/mmc/mmc.txt.
37
38- bus-width:		Number of data lines.
39			See:  Documentation/devicetree/bindings/mmc/mmc.txt.
40
41- max-frequency:	Can be 200MHz, 100MHz or 50MHz (default) and used for
42			configuring the CCONFIG3 in the mmcss.
43			See:  Documentation/devicetree/bindings/mmc/mmc.txt.
44
45- resets:		Phandle and reset specifier pair to softreset line of HC IP.
46			See: Documentation/devicetree/bindings/reset/reset.txt
47
48- vqmmc-supply:		Phandle to the regulator dt node, mentioned as the vcc/vdd
49			supply in eMMC/SD specs.
50
51- sd-uhs-sdr50:	To enable the SDR50 in the mmcss.
52			See:  Documentation/devicetree/bindings/mmc/mmc.txt.
53
54- sd-uhs-sdr104:	To enable the SDR104 in the mmcss.
55			See:  Documentation/devicetree/bindings/mmc/mmc.txt.
56
57- sd-uhs-ddr50:		To enable the DDR50 in the mmcss.
58			See:  Documentation/devicetree/bindings/mmc/mmc.txt.
59
60Example:
61
62/* Example stih416e eMMC configuration */
63
64mmc0: sdhci@fe81e000 {
65	compatible	= "st,sdhci";
66	reg		= <0xfe81e000 0x1000>;
67	interrupts	= <GIC_SPI 127 IRQ_TYPE_NONE>;
68	interrupt-names	= "mmcirq";
69	pinctrl-names	= "default";
70	pinctrl-0	= <&pinctrl_mmc0>;
71	clock-names	= "mmc";
72	clocks		= <&clk_s_a1_ls 1>;
73	bus-width	= <8>
74
75/* Example SD stih407 family configuration */
76
77mmc1: sdhci@9080000 {
78	compatible	= "st,sdhci-stih407", "st,sdhci";
79	reg		= <0x09080000 0x7ff>;
80	reg-names	= "mmc";
81	interrupts	= <GIC_SPI 90 IRQ_TYPE_NONE>;
82	interrupt-names	= "mmcirq";
83	pinctrl-names	= "default";
84	pinctrl-0	= <&pinctrl_sd1>;
85	clock-names	= "mmc";
86	clocks		= <&clk_s_c0_flexgen CLK_MMC_1>;
87	resets		= <&softreset STIH407_MMC1_SOFTRESET>;
88	bus-width	= <4>;
89};
90
91/* Example eMMC stih407 family configuration */
92
93mmc0: sdhci@9060000 {
94	compatible	= "st,sdhci-stih407", "st,sdhci";
95	reg		= <0x09060000 0x7ff>, <0x9061008 0x20>;
96	reg-names	= "mmc", "top-mmc-delay";
97	interrupts	= <GIC_SPI 92 IRQ_TYPE_NONE>;
98	interrupt-names	= "mmcirq";
99	pinctrl-names	= "default";
100	pinctrl-0	= <&pinctrl_mmc0>;
101	clock-names	= "mmc";
102	clocks		= <&clk_s_c0_flexgen CLK_MMC_0>;
103	vqmmc-supply	= <&vmmc_reg>;
104	max-frequency	= <200000000>;
105	bus-width	= <8>;
106	non-removable;
107	sd-uhs-sdr50;
108	sd-uhs-sdr104;
109	sd-uhs-ddr50;
110};
111