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scsi: dt-bindings: ufs: Add VCC capability on MediaTek UFS driver

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Add VCC supply for ufs-mediatek driver to provide power-saving operation
during low-power modes. For example VCC can be turned-off during system
suspend and turned-on after system is resumed.

Signed-off-by: Stanley Chu <stanley.chu@mediatek.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Stanley Chu 2019-03-29 23:32:48 +08:00 committed by Martin K. Petersen
parent 55dc9b3c31
commit c9d61a5aa3
1 changed files with 3 additions and 0 deletions
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3
Documentation/devicetree/bindings/ufs/ufs-mediatek.txt
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@ -21,6 +21,7 @@ Required properties for UFS nodes:
defined or a value in the array is "0" then it is assumed defined or a value in the array is "0" then it is assumed
that the frequency is set by the parent clock or a that the frequency is set by the parent clock or a
fixed rate clock source. fixed rate clock source.
- vcc-supply : phandle to VCC supply regulator node.
Example: Example:
@ -37,4 +38,6 @@ Example:
clocks = <&infracfg_ao INFRACFG_AO_UFS_CG>; clocks = <&infracfg_ao INFRACFG_AO_UFS_CG>;
clock-names = "ufs"; clock-names = "ufs";
freq-table-hz = <0 0>; freq-table-hz = <0 0>;
vcc-supply = <&mt_pmic_vemc_ldo_reg>;
}; };