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-Marvell Xenon SDHCI Controller device tree bindings
-This file documents differences between the core mmc properties
-described by mmc.txt and the properties used by the Xenon implementation.
-
-Multiple SDHCs might be put into a single Xenon IP, to save size and cost.
-Each SDHC is independent and owns independent resources, such as register sets,
-clock and PHY.
-Each SDHC should have an independent device tree node.
-
-Required Properties:
-- compatible: should be one of the following
-  - "marvell,armada-3700-sdhci": For controllers on Armada-3700 SoC.
-  Must provide a second register area and marvell,pad-type.
-  - "marvell,armada-ap806-sdhci": For controllers on Armada AP806.
-  - "marvell,armada-ap807-sdhci": For controllers on Armada AP807.
-  - "marvell,armada-cp110-sdhci": For controllers on Armada CP110.
-
-- clocks:
-  Array of clocks required for SDHC.
-  Require at least input clock for Xenon IP core. For Armada AP806 and
-  CP110, the AXI clock is also mandatory.
-
-- clock-names:
-  Array of names corresponding to clocks property.
-  The input clock for Xenon IP core should be named as "core".
-  The input clock for the AXI bus must be named as "axi".
-
-- reg:
-  * For "marvell,armada-3700-sdhci", two register areas.
-    The first one for Xenon IP register. The second one for the Armada 3700 SoC
-    PHY PAD Voltage Control register.
-    Please follow the examples with compatible "marvell,armada-3700-sdhci"
-    in below.
-    Please also check property marvell,pad-type in below.
-
-  * For other compatible strings, one register area for Xenon IP.
-
-Optional Properties:
-- marvell,xenon-sdhc-id:
-  Indicate the corresponding bit index of current SDHC in
-  SDHC System Operation Control Register Bit[7:0].
-  Set/clear the corresponding bit to enable/disable current SDHC.
-  If Xenon IP contains only one SDHC, this property is optional.
-
-- marvell,xenon-phy-type:
-  Xenon support multiple types of PHYs.
-  To select eMMC 5.1 PHY, set:
-  marvell,xenon-phy-type = "emmc 5.1 phy"
-  eMMC 5.1 PHY is the default choice if this property is not provided.
-  To select eMMC 5.0 PHY, set:
-  marvell,xenon-phy-type = "emmc 5.0 phy"
-
-  All those types of PHYs can support eMMC, SD and SDIO.
-  Please note that this property only presents the type of PHY.
-  It doesn't stand for the entire SDHC type or property.
-  For example, "emmc 5.1 phy" doesn't mean that this Xenon SDHC only
-  supports eMMC 5.1.
-
-- marvell,xenon-phy-znr:
-  Set PHY ZNR value.
-  Only available for eMMC PHY.
-  Valid range = [0:0x1F].
-  ZNR is set as 0xF by default if this property is not provided.
-
-- marvell,xenon-phy-zpr:
-  Set PHY ZPR value.
-  Only available for eMMC PHY.
-  Valid range = [0:0x1F].
-  ZPR is set as 0xF by default if this property is not provided.
-
-- marvell,xenon-phy-nr-success-tun:
-  Set the number of required consecutive successful sampling points
-  used to identify a valid sampling window, in tuning process.
-  Valid range = [1:7].
-  Set as 0x4 by default if this property is not provided.
-
-- marvell,xenon-phy-tun-step-divider:
-  Set the divider for calculating TUN_STEP.
-  Set as 64 by default if this property is not provided.
-
-- marvell,xenon-phy-slow-mode:
-  If this property is selected, transfers will bypass PHY.
-  Only available when bus frequency lower than 55MHz in SDR mode.
-  Disabled by default. Please only try this property if timing issues
-  always occur with PHY enabled in eMMC HS SDR, SD SDR12, SD SDR25,
-  SD Default Speed and HS mode and eMMC legacy speed mode.
-
-- marvell,xenon-tun-count:
-  Xenon SDHC SoC usually doesn't provide re-tuning counter in
-  Capabilities Register 3 Bit[11:8].
-  This property provides the re-tuning counter.
-  If this property is not set, default re-tuning counter will
-  be set as 0x9 in driver.
-
-- marvell,pad-type:
-  Type of Armada 3700 SoC PHY PAD Voltage Controller register.
-  Only valid when "marvell,armada-3700-sdhci" is selected.
-  Two types: "sd" and "fixed-1-8v".
-  If "sd" is selected, SoC PHY PAD is set as 3.3V at the beginning and is
-  switched to 1.8V when later in higher speed mode.
-  If "fixed-1-8v" is selected, SoC PHY PAD is fixed 1.8V, such as for eMMC.
-  Please follow the examples with compatible "marvell,armada-3700-sdhci"
-  in below.
-
-Example:
-- For eMMC:
-
-	sdhci@aa0000 {
-		compatible = "marvell,armada-ap806-sdhci";
-		reg = <0xaa0000 0x1000>;
-		interrupts = <GIC_SPI 13 IRQ_TYPE_LEVEL_HIGH>
-		clocks = <&emmc_clk>,<&axi_clk>;
-		clock-names = "core", "axi";
-		bus-width = <4>;
-		marvell,xenon-phy-slow-mode;
-		marvell,xenon-tun-count = <11>;
-		non-removable;
-		no-sd;
-		no-sdio;
-
-		/* Vmmc and Vqmmc are both fixed */
-	};
-
-- For SD/SDIO:
-
-	sdhci@ab0000 {
-		compatible = "marvell,armada-cp110-sdhci";
-		reg = <0xab0000 0x1000>;
-		interrupts = <GIC_SPI 55 IRQ_TYPE_LEVEL_HIGH>
-		vqmmc-supply = <&sd_vqmmc_regulator>;
-		vmmc-supply = <&sd_vmmc_regulator>;
-		clocks = <&sdclk>, <&axi_clk>;
-		clock-names = "core", "axi";
-		bus-width = <4>;
-		marvell,xenon-tun-count = <9>;
-	};
-
-- For eMMC with compatible "marvell,armada-3700-sdhci":
-
-	sdhci@aa0000 {
-		compatible = "marvell,armada-3700-sdhci";
-		reg = <0xaa0000 0x1000>,
-		      <phy_addr 0x4>;
-		interrupts = <GIC_SPI 13 IRQ_TYPE_LEVEL_HIGH>
-		clocks = <&emmcclk>;
-		clock-names = "core";
-		bus-width = <8>;
-		mmc-ddr-1_8v;
-		mmc-hs400-1_8v;
-		non-removable;
-		no-sd;
-		no-sdio;
-
-		/* Vmmc and Vqmmc are both fixed */
-
-		marvell,pad-type = "fixed-1-8v";
-	};
-
-- For SD/SDIO with compatible "marvell,armada-3700-sdhci":
-
-	sdhci@ab0000 {
-		compatible = "marvell,armada-3700-sdhci";
-		reg = <0xab0000 0x1000>,
-		      <phy_addr 0x4>;
-		interrupts = <GIC_SPI 55 IRQ_TYPE_LEVEL_HIGH>
-		vqmmc-supply = <&sd_regulator>;
-		/* Vmmc is fixed */
-		clocks = <&sdclk>;
-		clock-names = "core";
-		bus-width = <4>;
-
-		marvell,pad-type = "sd";
-	};