| Tom Rini | 53633a8 | 2024-02-29 12:33:36 -0500 | [diff] [blame^] | 1 | * STMicroelectronics sdhci-st MMC/SD controller |
| 2 | |
| 3 | This file documents the differences between the core properties in |
| 4 | Documentation/devicetree/bindings/mmc/mmc.txt and the properties |
| 5 | used by the sdhci-st driver. |
| 6 | |
| 7 | Required 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 | |
| 30 | Optional 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 | |
| 60 | Example: |
| 61 | |
| 62 | /* Example stih416e eMMC configuration */ |
| 63 | |
| 64 | mmc0: 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 | |
| 77 | mmc1: 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 | |
| 93 | mmc0: 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 | }; |