1* Qualcomm SDHCI controller (sdhci-msm)
2
3This file documents differences between the core properties in mmc.txt
4and the properties used by the sdhci-msm driver.
5
6Required properties:
7- compatible: Should contain a SoC-specific string and a IP version string:
8	version strings:
9		"qcom,sdhci-msm-v4" for sdcc versions less than 5.0
10		"qcom,sdhci-msm-v5" for sdcc version 5.0
11		For SDCC version 5.0.0, MCI registers are removed from SDCC
12		interface and some registers are moved to HC. New compatible
13		string is added to support this change - "qcom,sdhci-msm-v5".
14	full compatible strings with SoC and version:
15		"qcom,apq8084-sdhci", "qcom,sdhci-msm-v4"
16		"qcom,msm8226-sdhci", "qcom,sdhci-msm-v4"
17		"qcom,msm8953-sdhci", "qcom,sdhci-msm-v4"
18		"qcom,msm8974-sdhci", "qcom,sdhci-msm-v4"
19		"qcom,msm8916-sdhci", "qcom,sdhci-msm-v4"
20		"qcom,msm8992-sdhci", "qcom,sdhci-msm-v4"
21		"qcom,msm8994-sdhci", "qcom,sdhci-msm-v4"
22		"qcom,msm8996-sdhci", "qcom,sdhci-msm-v4"
23		"qcom,qcs404-sdhci", "qcom,sdhci-msm-v5"
24		"qcom,sc7180-sdhci", "qcom,sdhci-msm-v5";
25		"qcom,sc7280-sdhci", "qcom,sdhci-msm-v5";
26		"qcom,sdm845-sdhci", "qcom,sdhci-msm-v5"
27		"qcom,sdx55-sdhci", "qcom,sdhci-msm-v5";
28		"qcom,sm8250-sdhci", "qcom,sdhci-msm-v5"
29	NOTE that some old device tree files may be floating around that only
30	have the string "qcom,sdhci-msm-v4" without the SoC compatible string
31	but doing that should be considered a deprecated practice.
32
33- reg: Base address and length of the register in the following order:
34	- Host controller register map (required)
35	- SD Core register map (required for controllers earlier than msm-v5)
36	- CQE register map (Optional, CQE support is present on SDHC instance meant
37	                    for eMMC and version v4.2 and above)
38	- Inline Crypto Engine register map (optional)
39- reg-names: When CQE register map is supplied, below reg-names are required
40	- "hc" for Host controller register map
41	- "core" for SD core register map
42	- "cqhci" for CQE register map
43	- "ice" for Inline Crypto Engine register map (optional)
44- interrupts: Should contain an interrupt-specifiers for the interrupts:
45	- Host controller interrupt (required)
46- pinctrl-names: Should contain only one value - "default".
47- pinctrl-0: Should specify pin control groups used for this controller.
48- clocks: A list of phandle + clock-specifier pairs for the clocks listed in clock-names.
49- clock-names: Should contain the following:
50	"iface" - Main peripheral bus clock (PCLK/HCLK - AHB Bus clock) (required)
51	"core"	- SDC MMC clock (MCLK) (required)
52	"bus"	- SDCC bus voter clock (optional)
53	"xo"	- TCXO clock (optional)
54	"cal"	- reference clock for RCLK delay calibration (optional)
55	"sleep"	- sleep clock for RCLK delay calibration (optional)
56	"ice" - clock for Inline Crypto Engine (optional)
57
58- qcom,ddr-config: Certain chipsets and platforms require particular settings
59	for the DDR_CONFIG register. Use this field to specify the register
60	value as per the Hardware Programming Guide.
61
62- qcom,dll-config: Chipset and Platform specific value. Use this field to
63	specify the DLL_CONFIG register value as per Hardware Programming Guide.
64
65Optional Properties:
66* Following bus parameters are required for interconnect bandwidth scaling:
67- interconnects: Pairs of phandles and interconnect provider specifier
68		 to denote the edge source and destination ports of
69		 the interconnect path.
70
71- interconnect-names: For sdhc, we have two main paths.
72		1. Data path : sdhc to ddr
73		2. Config path : cpu to sdhc
74		For Data interconnect path the name supposed to be
75		is "sdhc-ddr" and for config interconnect path it is
76		"cpu-sdhc".
77		Please refer to Documentation/devicetree/bindings/
78		interconnect/ for more details.
79
80Example:
81
82	sdhc_1: sdhci@f9824900 {
83		compatible = "qcom,msm8974-sdhci", "qcom,sdhci-msm-v4";
84		reg = <0xf9824900 0x11c>, <0xf9824000 0x800>;
85		interrupts = <0 123 0>;
86		bus-width = <8>;
87		non-removable;
88
89		vmmc-supply = <&pm8941_l20>;
90		vqmmc-supply = <&pm8941_s3>;
91
92		pinctrl-names = "default";
93		pinctrl-0 = <&sdc1_clk &sdc1_cmd &sdc1_data>;
94
95		clocks = <&gcc GCC_SDCC1_APPS_CLK>, <&gcc GCC_SDCC1_AHB_CLK>;
96		clock-names = "core", "iface";
97		interconnects = <&qnoc MASTER_SDCC_ID &qnoc SLAVE_DDR_ID>,
98				<&qnoc MASTER_CPU_ID &qnoc SLAVE_SDCC_ID>;
99		interconnect-names = "sdhc-ddr","cpu-sdhc";
100
101		qcom,dll-config = <0x000f642c>;
102		qcom,ddr-config = <0x80040868>;
103	};
104
105	sdhc_2: sdhci@f98a4900 {
106		compatible = "qcom,msm8974-sdhci", "qcom,sdhci-msm-v4";
107		reg = <0xf98a4900 0x11c>, <0xf98a4000 0x800>;
108		interrupts = <0 125 0>;
109		bus-width = <4>;
110		cd-gpios = <&msmgpio 62 0x1>;
111
112		vmmc-supply = <&pm8941_l21>;
113		vqmmc-supply = <&pm8941_l13>;
114
115		pinctrl-names = "default";
116		pinctrl-0 = <&sdc2_clk &sdc2_cmd &sdc2_data>;
117
118		clocks = <&gcc GCC_SDCC2_APPS_CLK>, <&gcc GCC_SDCC2_AHB_CLK>;
119		clock-names = "core", "iface";
120
121		qcom,dll-config = <0x0007642c>;
122		qcom,ddr-config = <0x80040868>;
123	};
124