Hello!
On 7/27/2017 9:38 AM, Ryder Lee wrote:
Add DT bindings for the onboard SATA controller present on the MediaTek
SoCs.
Signed-off-by: Ryder Lee <ryder.lee@xxxxxxxxxxxx>
---
Documentation/devicetree/bindings/ata/ahci-mtk.txt | 48 ++++++++++++++++++++++
1 file changed, 48 insertions(+)
create mode 100644 Documentation/devicetree/bindings/ata/ahci-mtk.txt
diff --git a/Documentation/devicetree/bindings/ata/ahci-mtk.txt b/Documentation/devicetree/bindings/ata/ahci-mtk.txt
new file mode 100644
index 0000000..a8d11db
--- /dev/null
+++ b/Documentation/devicetree/bindings/ata/ahci-mtk.txt
@@ -0,0 +1,48 @@
+MediaTek Seria ATA controller
+
+Required properties:
+ - compatible : Must be "mediatek,ahci".
+ - reg : Physical base addresses and length of register sets.
+ - interrupts : Interrupt associated with the SATA device.
+ - interrupt-names : Associated name must be: "hostc".
+ - clocks : The phandle for the clock.
Your example shows that you need both phandle and specifier (afetr phandle).
+ - clock-names : Associated name must be: "ahb", "axi", "asic", "rbc", "pm"
+ - phys : The phandle for the PHY port.
Likewise.
+ - phy-names : Associated name must be: "sata-phy".
+ - ports-implemented : Mask that indicates which ports that the HBA supports
+ are available for software to use. Useful if PORTS_IMPL
+ is not programmed by the BIOS, which is true with some
+ embedded SOC's.
An empty line wouldn't hurt here...
+Optional properties:
+ - power-domains : A phandle and power domain specifier pair to the power
+ domain which is responsible for collapsing and restoring
+ power to the peripheral.
+ - resets : Must contain an entry for each entry in reset-names.
+ See ../reset/reset.txt for details.
+ - reset-names : Associated names must be: "axi-rst", "sw-rst", "reg-rst".
+ - mediatek,phy-mode : A phandle to the system controller, used to enable
+ SATA function.
+
+Example:
+
+ sata: sata@1a200000 {
+ compatible = "mediatek,ahci";
+ reg = <0 0x1a200000 0 0x1100>;
+ interrupts = <GIC_SPI 233 IRQ_TYPE_LEVEL_HIGH>;
+ interrupt-names = "hostc";
+ clocks = <&pciesys CLK_SATA_AHB_EN>,
+ <&pciesys CLK_SATA_AXI_EN>,
+ <&pciesys CLK_SATA_ASIC_EN>,
+ <&pciesys CLK_SATA_RBC_EN>,
+ <&pciesys CLK_SATA_PM_EN>;
+ clock-names = "ahb", "axi", "asic", "rbc", "pm";
+ phys = <&u3port1 PHY_TYPE_SATA>;
+ phy-names = "sata-phy";
+ ports-implemented = <0x1>;
+ power-domains = <&scpsys MT7622_POWER_DOMAIN_HIF0>;
+ resets = <&pciesys MT7622_SATA_AXI_BUS_RST>,
+ <&pciesys MT7622_SATA_PHY_SW_RST>,
+ <&pciesys MT7622_SATA_PHY_REG_RST>;
+ reset-names = "axi-rst", "sw-rst", "reg-rst";
+ mediatek,phy-mode = <&pciesys>;
+ };
MBR, Sergei
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