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* Qualcomm Technologies Inc Universal Flash Storage (UFS) PHY
UFSPHY nodes are defined to describe on-chip UFS PHY hardware macro.
Each UFS PHY node should have its own node.
To bind UFS PHY with UFS host controller, the controller node should
contain a phandle reference to UFS PHY node.
Required properties:
- compatible : compatible list, contains one of the following -
"qcom,ufs-phy-qmp-20nm" for 20nm ufs phy,
"qcom,ufs-phy-qmp-14nm" for legacy 14nm ufs phy,
"qcom,msm8996-ufs-phy-qmp-14nm" for 14nm ufs phy
present on MSM8996 chipset.
- reg : should contain PHY register address space (mandatory),
- reg-names : indicates various resources passed to driver (via reg proptery) by name.
Required "reg-names" is "phy_mem".
- #phy-cells : This property shall be set to 0
- vdda-phy-supply : phandle to main PHY supply for analog domain
- vdda-pll-supply : phandle to PHY PLL and Power-Gen block power supply
- clocks : List of phandle and clock specifier pairs
- clock-names : List of clock input name strings sorted in the same
order as the clocks property. "ref_clk_src", "ref_clk",
"tx_iface_clk" & "rx_iface_clk" are mandatory but
"ref_clk_parent" is optional
Optional properties:
- vdda-phy-max-microamp : specifies max. load that can be drawn from phy supply
- vdda-pll-max-microamp : specifies max. load that can be drawn from pll supply
- vddp-ref-clk-supply : phandle to UFS device ref_clk pad power supply
- vddp-ref-clk-max-microamp : specifies max. load that can be drawn from this supply
- vddp-ref-clk-always-on : specifies if this supply needs to be kept always on
Example:
ufsphy1: ufsphy@0xfc597000 {
compatible = "qcom,ufs-phy-qmp-20nm";
reg = <0xfc597000 0x800>;
reg-names = "phy_mem";
#phy-cells = <0>;
vdda-phy-supply = <&pma8084_l4>;
vdda-pll-supply = <&pma8084_l12>;
vdda-phy-max-microamp = <50000>;
vdda-pll-max-microamp = <1000>;
clock-names = "ref_clk_src",
"ref_clk_parent",
"ref_clk",
"tx_iface_clk",
"rx_iface_clk";
clocks = <&clock_rpm clk_ln_bb_clk>,
<&clock_gcc clk_pcie_1_phy_ldo >,
<&clock_gcc clk_ufs_phy_ldo>,
<&clock_gcc clk_gcc_ufs_tx_cfg_clk>,
<&clock_gcc clk_gcc_ufs_rx_cfg_clk>;
};
ufshc@0xfc598000 {
...
phys = <&ufsphy1>;
phy-names = "ufsphy";
};
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