mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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61 lines
1.8 KiB
Plaintext
61 lines
1.8 KiB
Plaintext
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* Hisilicon specific extensions to the Synopsys Designware Mobile
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Storage Host Controller
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Read synopsys-dw-mshc.txt for more details
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The Synopsys designware mobile storage host controller is used to interface
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a SoC with storage medium such as eMMC or SD/MMC cards. This file documents
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differences between the core Synopsys dw mshc controller properties described
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by synopsys-dw-mshc.txt and the properties used by the Hisilicon specific
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extensions to the Synopsys Designware Mobile Storage Host Controller.
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Required Properties:
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* compatible: should be one of the following.
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- "hisilicon,hi4511-dw-mshc": for controllers with hi4511 specific extentions.
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* clock-freq-table: should be the frequency (in Hz) array of the ciu clock
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in each supported mode.
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0. CIU clock rate in Hz for DS mode
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1. CIU clock rate in Hz for MMC HS mode
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2. CIU clock rate in Hz for SD HS mode
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3. CIU clock rate in Hz for SDR12 mode
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4. CIU clock rate in Hz for SDR25 mode
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5. CIU clock rate in Hz for SDR50 mode
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6. CIU clock rate in Hz for SDR104 mode
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7. CIU clock rate in Hz for DDR50 mode
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8. CIU clock rate in Hz for HS200 mode
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Example:
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/* for Hi3620 */
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/* SoC portion */
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dwmmc_0: dwmmc0@fcd03000 {
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compatible = "hisilicon,hi4511-dw-mshc";
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reg = <0xfcd03000 0x1000>;
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interrupts = <0 16 4>;
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#address-cells = <1>;
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#size-cells = <0>;
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clocks = <&mmc_clock HI3620_SD_CIUCLK>, <&clock HI3620_DDRC_PER_CLK>;
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clock-names = "ciu", "biu";
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clock-freq-table =
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<25000000 0 50000000 25000000 50000000 100000000 0 50000000>;
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};
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/* Board portion */
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dwmmc0@fcd03000 {
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num-slots = <1>;
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vmmc-supply = <&ldo12>;
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fifo-depth = <0x100>;
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supports-highspeed;
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pinctrl-names = "default";
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pinctrl-0 = <&sd_pmx_pins &sd_cfg_func1 &sd_cfg_func2>;
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slot@0 {
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reg = <0>;
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bus-width = <4>;
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disable-wp;
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cd-gpios = <&gpio10 3 0>;
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};
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};
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