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| author |   Bjorn Andersson <bjorn.andersson@linaro.org> | 2019-08-28 12:17:55 -0700 |
|---|---|---|
| committer |   Martin K. Petersen <martin.petersen@oracle.com> | 2019-09-07 16:36:03 -0400 |
| commit | b8416b2fedbf1cfe1c3645c627b2341d253880bd (patch) | |
| tree | e2b085f6e9024efe16e13bee7bdd33018797a436 /Documentation/devicetree/bindings/ufs/ufshcd-pltfrm.txt | |
| parent | scsi: ufs: Introduce vops for resetting device (diff) | |
| download | linux-dev-b8416b2fedbf1cfe1c3645c627b2341d253880bd.tar.xz linux-dev-b8416b2fedbf1cfe1c3645c627b2341d253880bd.zip | |
scsi: ufs-qcom: Implement device_reset vops
The UFS_RESET pin on Qualcomm SoCs are controlled by TLMM and exposed
through the GPIO framework. Acquire the device-reset GPIO and use this to
implement the device_reset vops, to allow resetting the attached memory.
Based on downstream support implemented by Subhash Jadavani
<subhashj@codeaurora.org>.
Link: https://lore.kernel.org/r/20190828191756.24312-3-bjorn.andersson@linaro.org
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Acked-by: Rob Herring <robh@kernel.org>
Acked-by: Avri Altman <Avri.Altman@wdc.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'Documentation/devicetree/bindings/ufs/ufshcd-pltfrm.txt')
| -rw-r--r-- | Documentation/devicetree/bindings/ufs/ufshcd-pltfrm.txt | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/ufs/ufshcd-pltfrm.txt b/Documentation/devicetree/bindings/ufs/ufshcd-pltfrm.txt index a74720486ee2..d78ef63935f9 100644 --- a/Documentation/devicetree/bindings/ufs/ufshcd-pltfrm.txt +++ b/Documentation/devicetree/bindings/ufs/ufshcd-pltfrm.txt @@ -54,6 +54,8 @@ Optional properties: PHY reset from the UFS controller. - resets : reset node register - reset-names : describe reset node register, the "rst" corresponds to reset the whole UFS IP. +- reset-gpios : A phandle and gpio specifier denoting the GPIO connected + to the RESET pin of the UFS memory device. Note: If above properties are not defined it can be assumed that the supply regulators or clocks are always on. |