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scsi: ufs: dt-bindings: add document for hisi-ufs

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add ufs node document for Hisilicon.

Signed-off-by: Li Wei <liwei213@huawei.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Tested-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
liwei 2018-07-17 17:36:57 +08:00 committed by Martin K. Petersen
parent 8111b5e334
commit 8ee94ec065
2 changed files with 48 additions and 3 deletions
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41
Documentation/devicetree/bindings/ufs/ufs-hisi.txt Normal file
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@ -0,0 +1,41 @@
* Hisilicon Universal Flash Storage (UFS) Host Controller
UFS nodes are defined to describe on-chip UFS hardware macro.
Each UFS Host Controller should have its own node.
Required properties:
- compatible : compatible list, contains one of the following -
"hisilicon,hi3660-ufs", "jedec,ufs-1.1" for hisi ufs
host controller present on Hi36xx chipset.
- reg : should contain UFS register address space & UFS SYS CTRL register address,
- interrupt-parent : interrupt device
- interrupts : interrupt number
- 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", "phy_clk" is optional
- freq-table-hz : Array of <min max> operating frequencies stored in the same
order as the clocks property. If this property is not
defined or a value in the array is "0" then it is assumed
that the frequency is set by the parent clock or a
fixed rate clock source.
- resets : describe reset node register
- reset-names : reset node register, the "rst" corresponds to reset the whole UFS IP.
Example:
ufs: ufs@ff3b0000 {
compatible = "hisilicon,hi3660-ufs", "jedec,ufs-1.1";
/* 0: HCI standard */
/* 1: UFS SYS CTRL */
reg = <0x0 0xff3b0000 0x0 0x1000>,
<0x0 0xff3b1000 0x0 0x1000>;
interrupt-parent = <&gic>;
interrupts = <GIC_SPI 278 IRQ_TYPE_LEVEL_HIGH>;
clocks = <&crg_ctrl HI3660_CLK_GATE_UFSIO_REF>,
<&crg_ctrl HI3660_CLK_GATE_UFSPHY_CFG>;
clock-names = "ref_clk", "phy_clk";
freq-table-hz = <0 0>, <0 0>;
/* offset: 0x84; bit: 12 */
resets = <&crg_rst 0x84 12>;
reset-names = "rst";
};

10
Documentation/devicetree/bindings/ufs/ufshcd-pltfrm.txt
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@ -41,6 +41,8 @@ Optional properties:
-lanes-per-direction : number of lanes available per direction - either 1 or 2.
Note that it is assume same number of lanes is used both
directions at once. If not specified, default is 2 lanes per direction.
- resets : reset node register
- reset-names : describe reset node register, the "rst" corresponds to reset the whole UFS IP.
Note: If above properties are not defined it can be assumed that the supply
regulators or clocks are always on.
@ -61,9 +63,11 @@ Example:
vccq-max-microamp = 200000;
vccq2-max-microamp = 200000;
clocks = <&core 0>, <&ref 0>, <&iface 0>;
clock-names = "core_clk", "ref_clk", "iface_clk";
freq-table-hz = <100000000 200000000>, <0 0>, <0 0>;
clocks = <&core 0>, <&ref 0>, <&phy 0>, <&iface 0>;
clock-names = "core_clk", "ref_clk", "phy_clk", "iface_clk";
freq-table-hz = <100000000 200000000>, <0 0>, <0 0>, <0 0>;
resets = <&reset 0 1>;
reset-names = "rst";
phys = <&ufsphy1>;
phy-names = "ufsphy";
};