These changes are the raw update to linux-4.4.6-rt14. Kernel sources

[kvmfornfv.git] / kernel / Documentation / devicetree / bindings / mmc / mtk-sd.txt

diff --git a/kernel/Documentation/devicetree/bindings/mmc/mtk-sd.txt b/kernel/Documentation/devicetree/bindings/mmc/mtk-sd.txt
new file mode 100644 (file)
index 0000000..0120c7f
--- /dev/null
+++ b/kernel/Documentation/devicetree/bindings/mmc/mtk-sd.txt
@@ -0,0 +1,41 @@
+* MTK MMC controller
+
+The MTK  MSDC can act as a MMC controller
+to support MMC, SD, and SDIO types of memory cards.
+
+This file documents differences between the core properties in mmc.txt
+and the properties used by the msdc driver.
+
+Required properties:
+- compatible: Should be "mediatek,mt8173-mmc","mediatek,mt8135-mmc"
+- interrupts: Should contain MSDC interrupt number
+- clocks: MSDC source clock, HCLK
+- clock-names: "source", "hclk"
+- pinctrl-names: should be "default", "state_uhs"
+- pinctrl-0: should contain default/high speed pin ctrl
+- pinctrl-1: should contain uhs mode pin ctrl
+- vmmc-supply: power to the Core
+- vqmmc-supply: power to the IO
+
+Optional properties:
+- assigned-clocks: PLL of the source clock
+- assigned-clock-parents: parent of source clock, used for HS400 mode to get 400Mhz source clock
+- hs400-ds-delay: HS400 DS delay setting
+
+Examples:
+mmc0: mmc@11230000 {
+       compatible = "mediatek,mt8173-mmc", "mediatek,mt8135-mmc";
+       reg = <0 0x11230000 0 0x108>;
+       interrupts = <GIC_SPI 39 IRQ_TYPE_LEVEL_LOW>;
+       vmmc-supply = <&mt6397_vemc_3v3_reg>;
+       vqmmc-supply = <&mt6397_vio18_reg>;
+       clocks = <&pericfg CLK_PERI_MSDC30_0>,
+                <&topckgen CLK_TOP_MSDC50_0_H_SEL>;
+       clock-names = "source", "hclk";
+       pinctrl-names = "default", "state_uhs";
+       pinctrl-0 = <&mmc0_pins_default>;
+       pinctrl-1 = <&mmc0_pins_uhs>;
+       assigned-clocks = <&topckgen CLK_TOP_MSDC50_0_SEL>;
+       assigned-clock-parents = <&topckgen CLK_TOP_MSDCPLL_D2>;
+       hs400-ds-delay = <0x14015>;
+};