[PATCH v6 02/11] regulator: dt-bindings: Add Renesas RAA215300 PMIC bindings

Biju Das
2023-06-02T14:25:31Z

Document Renesas RAA215300 PMIC bindings.

The RAA215300 is a high Performance 9-Channel PMIC supporting DDR
Memory, with Built-In Charger and RTC.

It supports DDR3, DDR3L, DDR4, and LPDDR4 memory power requirements.
The internally compensated regulators, built-in Real-Time Clock (RTC),
32kHz crystal oscillator, and coin cell battery charger provide a
highly integrated, small footprint power solution ideal for
System-On-Module (SOM) applications. A spread spectrum feature
provides an ease-of-use solution for noise-sensitive audio or RF
applications.

Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
---
v5->v6:
* Added Rb tag from Geert.
* Updated the example with replacing node name "clock-xtal"->"x2-clock".
v4->v5:
* Added description for clocks.
* Replaced Oneof->enum in clock-names as it is simpler.
* Added Rb tag from Conor.
v3->v4:
* Moved bindings from mfd->regulator.
* Dropped minItems from reg.
* Dropped renesas,rtc-enabled property and instead used clock-names property
to find RTC is enabled or not.
* Added reg-names in required property.
* Updated the example.
v2->v3:
* Added more detailed description for renesas,rtc-enabled property.
RFC->v2:
* Updated reg property
* Added optional reg-names, interrupts and renesas,rtc-enabled
properties.
* Fixed the node name in the example
* Dropped the cross link property renesas,raa215300-rtc.
* Updated the example
---
.../bindings/regulator/renesas,raa215300.yaml | 85 +++++++++++++++++++
1 file changed, 85 insertions(+)
create mode 100644 Documentation/devicetree/bindings/regulator/renesas,raa215300.yaml

diff --git a/Documentation/devicetree/bindings/regulator/renesas,raa215300.yaml b/Documentation/devicetree/bindings/regulator/renesas,raa215300.yaml
new file mode 100644
index 000000000000..97cff71d2967
--- /dev/null
+++ b/Documentation/devicetree/bindings/regulator/renesas,raa215300.yaml
@@ -0,0 +1,85 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/regulator/renesas,raa215300.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Renesas RAA215300 Power Management Integrated Circuit (PMIC)
+
+maintainers:
+ - Biju Das <biju.das.jz@bp.renesas.com>
+
+description: |
+ The RAA215300 is a high-performance, low-cost 9-channel PMIC designed for
+ 32-bit and 64-bit MCU and MPU applications. It supports DDR3, DDR3L, DDR4,
+ and LPDDR4 memory power requirements. The internally compensated regulators,
+ built-in Real-Time Clock (RTC), 32kHz crystal oscillator, and coin cell
+ battery charger provide a highly integrated, small footprint power solution
+ ideal for System-On-Module (SOM) applications. A spread spectrum feature
+ provides an ease-of-use solution for noise-sensitive audio or RF applications.
+
+ This device exposes two devices via I2C. One for the integrated RTC IP, and
+ one for everything else.
+
+ Link to datasheet:
+ https://www.renesas.com/in/en/products/power-power-management/multi-channel-power-management-ics-pmics/ssdsoc-power-management-ics-pmic-and-pmus/raa215300-high-performance-9-channel-pmic-supporting-ddr-memory-built-charger-and-rtc
+
+properties:
+ compatible:
+ enum:
+ - renesas,raa215300
+
+ reg:
+ maxItems: 2
+
+ reg-names:
+ items:
+ - const: main
+ - const: rtc
+
+ interrupts:
+ maxItems: 1
+
+ clocks:
+ description: |
+ The clocks are optional. The RTC is disabled, if no clocks are
+ provided(either xin or clkin).
+ maxItems: 1
+
+ clock-names:
+ description: |
+ Use xin, if connected to an external crystal.
+ Use clkin, if connected to an external clock signal.
+ enum:
+ - xin
+ - clkin
+
+required:
+ - compatible
+ - reg
+ - reg-names
+
+additionalProperties: false
+
+examples:
+ - |
+ /* 32.768kHz crystal */
+ x2: x2-clock {
+ compatible = "fixed-clock";
+ #clock-cells = <0>;
+ clock-frequency = <32768>;
+ };
+
+ i2c {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ raa215300: pmic@12 {
+ compatible = "renesas,raa215300";
+ reg = <0x12>, <0x6f>;
+ reg-names = "main", "rtc";
+
+ clocks = <&x2>;
+ clock-names = "xin";
+ };
+ };
--
2.25.1