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1 * MTK MMC controller
2
3 The MTK  MSDC can act as a MMC controller
4 to support MMC, SD, and SDIO types of memory cards.
5
6 This file documents differences between the core properties in mmc.txt
7 and the properties used by the msdc driver.
8
9 Required properties:
10 - compatible: Should be "mediatek,mt8173-mmc","mediatek,mt8135-mmc"
11 - interrupts: Should contain MSDC interrupt number
12 - clocks: MSDC source clock, HCLK
13 - clock-names: "source", "hclk"
14 - pinctrl-names: should be "default", "state_uhs"
15 - pinctrl-0: should contain default/high speed pin ctrl
16 - pinctrl-1: should contain uhs mode pin ctrl
17 - vmmc-supply: power to the Core
18 - vqmmc-supply: power to the IO
19
20 Optional properties:
21 - assigned-clocks: PLL of the source clock
22 - assigned-clock-parents: parent of source clock, used for HS400 mode to get 400Mhz source clock
23 - hs400-ds-delay: HS400 DS delay setting
24
25 Examples:
26 mmc0: mmc@11230000 {
27         compatible = "mediatek,mt8173-mmc", "mediatek,mt8135-mmc";
28         reg = <0 0x11230000 0 0x108>;
29         interrupts = <GIC_SPI 39 IRQ_TYPE_LEVEL_LOW>;
30         vmmc-supply = <&mt6397_vemc_3v3_reg>;
31         vqmmc-supply = <&mt6397_vio18_reg>;
32         clocks = <&pericfg CLK_PERI_MSDC30_0>,
33                  <&topckgen CLK_TOP_MSDC50_0_H_SEL>;
34         clock-names = "source", "hclk";
35         pinctrl-names = "default", "state_uhs";
36         pinctrl-0 = <&mmc0_pins_default>;
37         pinctrl-1 = <&mmc0_pins_uhs>;
38         assigned-clocks = <&topckgen CLK_TOP_MSDC50_0_SEL>;
39         assigned-clock-parents = <&topckgen CLK_TOP_MSDCPLL_D2>;
40         hs400-ds-delay = <0x14015>;
41 };