[PATCH v3 01/12] dt-bindings: ufs: add common platform bindings

From: Krzysztof Kozlowski
Date: Sun Mar 06 2022 - 06:12:12 EST


Add bindings for common parts (platform) of Universal Flash Storage
(UFS) Host Controllers in dtschema format.

Include also the bindings directory in the UFS maintainers entry.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxxxxx>
---
.../devicetree/bindings/ufs/ufs-common.yaml | 82 +++++++++++++++++++
MAINTAINERS | 1 +
2 files changed, 83 insertions(+)
create mode 100644 Documentation/devicetree/bindings/ufs/ufs-common.yaml

diff --git a/Documentation/devicetree/bindings/ufs/ufs-common.yaml b/Documentation/devicetree/bindings/ufs/ufs-common.yaml
new file mode 100644
index 000000000000..47a4e9e1a775
--- /dev/null
+++ b/Documentation/devicetree/bindings/ufs/ufs-common.yaml
@@ -0,0 +1,82 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/ufs/ufs-common.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Common properties for Universal Flash Storage (UFS) Host Controllers
+
+maintainers:
+ - Alim Akhtar <alim.akhtar@xxxxxxxxxxx>
+ - Avri Altman <avri.altman@xxxxxxx>
+
+properties:
+ clocks: true
+
+ clock-names: true
+
+ freq-table-hz:
+ items:
+ items:
+ - description: Minimum frequency for given clock in Hz
+ - description: Maximum frequency for given clock in Hz
+ description: |
+ Array of <min max> operating frequencies in Hz 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.
+
+ interrupts:
+ maxItems: 1
+
+ lanes-per-direction:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ enum: [1, 2]
+ default: 2
+ description:
+ Number of lanes available per direction. Note that it is assume same
+ number of lanes is used both directions at once.
+
+ vdd-hba-supply:
+ description:
+ Phandle to UFS host controller supply regulator node.
+
+ vcc-supply:
+ description:
+ Phandle to VCC supply regulator node.
+
+ vccq-supply:
+ description:
+ Phandle to VCCQ supply regulator node.
+
+ vccq2-supply:
+ description:
+ Phandle to VCCQ2 supply regulator node.
+
+ vcc-supply-1p8:
+ type: boolean
+ description:
+ For embedded UFS devices, valid VCC range is 1.7-1.95V or 2.7-3.6V. This
+ boolean property when set, specifies to use low voltage range of
+ 1.7-1.95V. Note for external UFS cards this property is invalid and valid
+ VCC range is always 2.7-3.6V.
+
+ vcc-max-microamp:
+ description:
+ Specifies max. load that can be drawn from VCC supply.
+
+ vccq-max-microamp:
+ description:
+ Specifies max. load that can be drawn from VCCQ supply.
+
+ vccq2-max-microamp:
+ description:
+ Specifies max. load that can be drawn from VCCQ2 supply.
+
+dependencies:
+ freq-table-hz: [ 'clocks' ]
+
+required:
+ - interrupts
+
+additionalProperties: true
diff --git a/MAINTAINERS b/MAINTAINERS
index d7ea92ce1b1d..ef16268b6ca6 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -20100,6 +20100,7 @@ R: Alim Akhtar <alim.akhtar@xxxxxxxxxxx>
R: Avri Altman <avri.altman@xxxxxxx>
L: linux-scsi@xxxxxxxxxxxxxxx
S: Supported
+F: Documentation/devicetree/bindings/ufs/
F: Documentation/scsi/ufs.rst
F: drivers/scsi/ufs/

--
2.32.0