[PATCH 4/9] regulator: dt-bindings: mediatek: Add MT6366 PMIC

[Chen-Yu Tsai <wenst@chromium.org>]

From: Zhiyong Tao <zhiyong.tao@mediatek.com>

The MediaTek MT6366 PMIC is similar to the MT6358 PMIC. It is designed
to be paired with the MediaTek MT8186 SoC. It has 9 buck regulators and
29 LDO regulators, not counting ones that feed internally and basically
have no controls. The regulators are named after their intended usage
for the SoC and system design, thus not named generically as ldoX or
dcdcX, but as vcn33 or vgpu.

Add a binding document describing all the regulators and their supplies.

Signed-off-by: Zhiyong Tao <zhiyong.tao@mediatek.com>
[wens@chromium.org: major rework and added commit message]
Signed-off-by: Chen-Yu Tsai <wenst@chromium.org>
---
Changes since Zhiyong's last version (v4) [1]:
- simplified regulator names
- added descriptions to regulators
- removed bogus regulators (*_sshub)
- merged vcn33-wifi and vcn33-bt as vcn33
- added missing regulators (vm18, vmddr, vsram-core)
- cut down examples to a handful of cases and made them complete
- expanded commit message a lot

[1] https://lore.kernel.org/linux-arm-kernel/20220823123745.14061-1-zhiyong.tao@mediatek.com/

 .../regulator/mediatek,mt6366-regulator.yaml  | 154 ++++++++++++++++++
 1 file changed, 154 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/regulator/mediatek,mt6366-regulator.yaml

diff --git a/Documentation/devicetree/bindings/regulator/mediatek,mt6366-regulator.yaml b/Documentation/devicetree/bindings/regulator/mediatek,mt6366-regulator.yaml
new file mode 100644
index 000000000000..715c6ffcb3ab
--- /dev/null
+++ b/Documentation/devicetree/bindings/regulator/mediatek,mt6366-regulator.yaml
@@ -0,0 +1,154 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/regulator/mediatek,mt6366-regulator.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: MT6366 Regulator from MediaTek Integrated
+
+maintainers:
+  - Zhiyong Tao <zhiyong.tao@mediatek.com>
+
+description: |
+  Regulator part of the MT6366 PMIC. This node should be under the PMIC's
+  device node.
+
+properties:
+  compatible:
+    const: mediatek,mt6366-regulator
+
+  vsys_ldo1-supply:
+    description: Supply for LDOs vfe28, vxo22, vcn28, vaux18, vaud28, vsim1, vusb, vbif28
+  vsys_ldo2-supply:
+    description: Supply for LDOs vio28, vmc, vmch, vsim2
+  vsys_ldo3-supply:
+    description: Supply for LDOs vcn33, vemc, vibr
+  vsys_vcore-supply:
+    description: Supply for buck regulator vcore
+  vsys_vdram1-supply:
+    description: Supply for buck regulator vdram1
+  vsys_vgpu-supply:
+    description: Supply for buck regulator vgpu
+  vsys_vmodem-supply:
+    description: Supply for buck regulator vmodem
+  vsys_vpa-supply:
+    description: Supply for buck regulator vpa
+  vsys_vproc11-supply:
+    description: Supply for buck regulator vproc11
+  vsys_vproc12-supply:
+    description: Supply for buck regulator vproc12
+  vsys_vs1-supply:
+    description: Supply for buck regulator vs1
+  vsys_vs2-supply:
+    description: Supply for buck regulator vs2
+  vs1_ldo1-supply:
+    description: Supply for LDOs vrf18, vefuse, vcn18, vio18, vm18
+  vs2_ldo1-supply:
+    description: Supply for LDOs vmddr, vdram2
+  vs2_ldo2-supply:
+    description: Supply for LDOs vrf12, va12
+  vs2_ldo3-supply:
+    description: Supply for LDOs vsram-core, vsram-gpu, vsram-others, vsram-proc11, vsram-proc12
+
+patternProperties:
+  "^v(core|dram1|gpu|modem|pa|proc1[12]|s[12])$":
+    description: Buck regulators
+    type: object
+    $ref: regulator.yaml#
+    unevaluatedProperties: false
+
+  "^v(a|rf)12":
+    description: LDOs with fixed 1.2V output and 0~100/10mV tuning
+    type: object
+    $ref: regulator.yaml#
+    unevaluatedProperties: false
+
+  "^v(aux|io|rf)18":
+    description: LDOs with fixed 1.8V output and 0~100/10mV tuning
+    type: object
+    $ref: regulator.yaml#
+    unevaluatedProperties: false
+
+  "^vxo22":
+    description: LDOs with fixed 2.2V output and 0~100/10mV tuning
+    type: object
+    $ref: regulator.yaml#
+    unevaluatedProperties: false
+
+  "^v(aud|bif|cn|fe|io)28":
+    description: LDOs with fixed 2.8V output and 0~100/10mV tuning
+    type: object
+    $ref: regulator.yaml#
+    unevaluatedProperties: false
+
+  "^vusb":
+    description: LDOs with fixed 3.0V output and 0~100/10mV tuning
+    type: object
+    $ref: regulator.yaml#
+    unevaluatedProperties: false
+
+  "^vsram-(core|gpu|others|proc1[12])$":
+    description: LDOs with variable output
+    type: object
+    $ref: regulator.yaml#
+    unevaluatedProperties: false
+
+  "^v(cn18|cn33|dram2|efuse|emc|ibr|m18|mc|mch|mddr|sim[12])$":
+    description: LDOs with variable output and 0~100/10mV tuning
+    type: object
+    $ref: regulator.yaml#
+    unevaluatedProperties: false
+
+required:
+  - compatible
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/regulator/mediatek,mt6397-regulator.h>
+
+    regulator {
+        compatible = "mediatek,mt6366-regulator";
+
+        vdram1 {
+            regulator-name = "pp1125_emi_vdd2";
+            regulator-min-microvolt = <1125000>;
+            regulator-max-microvolt = <1125000>;
+            regulator-ramp-delay = <12500>;
+            regulator-enable-ramp-delay = <0>;
+            regulator-allowed-modes = <MT6397_BUCK_MODE_AUTO
+                                       MT6397_BUCK_MODE_FORCE_PWM>;
+            regulator-always-on;
+        };
+
+        vproc11 {
+            regulator-name = "ppvar_dvdd_proc_bc_mt6366";
+            regulator-min-microvolt = <600000>;
+            regulator-max-microvolt = <1200000>;
+            regulator-ramp-delay = <6250>;
+            regulator-enable-ramp-delay = <200>;
+            regulator-allowed-modes = <MT6397_BUCK_MODE_AUTO
+                                       MT6397_BUCK_MODE_FORCE_PWM>;
+            regulator-always-on;
+        };
+
+        vmddr {
+            regulator-name = "pm0750_emi_vmddr";
+            regulator-min-microvolt = <700000>;
+            regulator-max-microvolt = <750000>;
+            regulator-enable-ramp-delay = <325>;
+            regulator-always-on;
+        };
+
+        vsram-proc11 {
+            regulator-name = "pp0900_dvdd_sram_bc";
+            regulator-min-microvolt = <850000>;
+            regulator-max-microvolt = <1120000>;
+            regulator-ramp-delay = <6250>;
+            regulator-enable-ramp-delay = <240>;
+            regulator-always-on;
+        };
+    };
+
+...
-- 
2.41.0.585.gd2178a4bd4-goog