[PATCH 2/8] dt-bindings: mfd: ROHM BD73800 PMIC

[Matti Vaittinen <matti.vaittinen@linux.dev>]

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From: Matti Vaittinen <mazziesaccount@gmail.com>

The ROHM BD73800 is a power management IC which integrates 8 BUCKs and 4
LDOs. There is also an ADC and operation amplifier intended for current
/ temperature measurement and accumulation. RTC and 32.768 kHz clock
gate are also included. The PMIC can be customized via OTP and it has
options for operating as a main PMIC in multi-PMIC installation. Some
of the pins can also be used for GPO or GPI (including interrupt support).

There are also ROHM BD71851 and BD71885 PMICs out there. These are, from
the SW-perspective, similar to the BD73800. There is only some different
default values and OTP settings. The driver should be able to handle them
just fine.

Signed-off-by: Matti Vaittinen <mazziesaccount@gmail.com>
---
 .../bindings/mfd/rohm,bd73800-pmic.yaml       | 229 ++++++++++++++++++
 1 file changed, 229 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/mfd/rohm,bd73800-pmic.yaml

diff --git a/Documentation/devicetree/bindings/mfd/rohm,bd73800-pmic.yaml b/Documentation/devicetree/bindings/mfd/rohm,bd73800-pmic.yaml
new file mode 100644
index 000000000000..6371de08b865
--- /dev/null
+++ b/Documentation/devicetree/bindings/mfd/rohm,bd73800-pmic.yaml
@@ -0,0 +1,229 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mfd/rohm,bd73800-pmic.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: ROHM BD73800 Power Management Integrated Circuit
+
+maintainers:
+  - Matti Vaittinen <mazziesaccount@gmail.com>
+
+description:
+  BD73800GW is a single-chip power management IC for battery-powered
+  portable devices. It integrates 8 buck converters, 4 LDOs and a current
+  sense amplifier with ADC. Also included is a Real Time Clock (RTC) and a
+  32.768 kHz clock gate. Depending on the OTP configuration the BD73800
+  may also have interrupt controller and GPIOs.
+
+  There are also different variants called BD71851 and BD71885 which are
+  almost identical from the software point of view.
+
+properties:
+  compatible:
+    oneOf:
+      - const: rohm,bd73800
+
+      - items:
+          - const: rohm,bd71851
+          - const: rohm,bd73800
+
+      - items:
+          - const: rohm,bd71885
+          - const: rohm,bd73800
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  # The GPIO1, CLKOUT (GPIO2), FAULT_B and EXTEN_OUT pins can be
+  # configured to interrupt pins by OTP.
+  interrupt-controller: true
+
+  "#interrupt-cells":
+    const: 1
+    description:
+      The IRQ number. 0 is GPIO1, 1 CLKOUT (GPIO2), 2 FAULT_B and 3 EXTEN_OUT.
+      NOTE, A pin can operate as IRQ source only when the OTP
+      configuration for it has been set to GPI.
+
+  gpio-controller: true
+
+  "#gpio-cells":
+    const: 2
+
+# The GPIO1, CLKOUT, FAULT_B and EXTEN_OUT pins may be configured for a
+# specific purpose (like ADC input, 32.768 clk output, fault indicator or
+# delivering power sequence to a companion PMIC when multiple PMICs are
+# used) - but also to be either a GPO or GPI. (When used as a GPI the pin
+# can also be used as an IRQ source). The pin purpose is determined by
+# OTP (One Time Programmable memory), typically during device manufacturing.
+# The OTP can't be read at runtime so device-tree should describe the pins.
+  rohm,pin-gpio1:
+    $ref: /schemas/types.yaml#/definitions/string
+    description:
+      Indicate if the GPIO1 pin has been set to GPI or GPO at manufacturing.
+    enum: [gpi, gpo]
+
+  rohm,pin-clkout:
+    $ref: /schemas/types.yaml#/definitions/string
+    description:
+      Indicate if the CLKOUT pin has been set to GPI or GPO at manufacturing.
+    enum: [gpi, gpo]
+
+  rohm,pin-fault-b:
+    $ref: /schemas/types.yaml#/definitions/string
+    description:
+      Indicate if the FAULT_B pin has been set to GPI or GPO at manufacturing.
+    enum: [gpi, gpo]
+
+  rohm,pin-exten:
+    $ref: /schemas/types.yaml#/definitions/string
+    description:
+      Indicate if the EXTEN_OUT pin has been set to GPI or GPO at
+      manufacturing.
+    enum: [gpi, gpo]
+
+  # The CLKOUT pin may have its purpose overridden by OTP configuration. It is
+  # possible the BD73800 does not output a clock signal. Hence the optional clk
+  # properties.
+  clocks:
+    maxItems: 1
+
+  "#clock-cells":
+    const: 0
+
+  clock-output-names:
+    const: bd73800-32k-out
+
+  rohm,clkout-open-drain:
+    description: clk32kout mode. Set to 1 for "open-drain" or 0 for "cmos".
+    $ref: /schemas/types.yaml#/definitions/uint32
+    minimum: 0
+    maximum: 1
+
+  regulators:
+    $ref: /schemas/regulator/rohm,bd73800-regulator.yaml
+    description:
+      List of child nodes that specify the regulators.
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - regulators
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+    #include <dt-bindings/leds/common.h>
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+        pmic: pmic@4b {
+            compatible = "rohm,bd73800";
+            reg = <0x4b>;
+
+            interrupt-parent = <&gpio1>;
+            interrupts = <29 IRQ_TYPE_LEVEL_LOW>;
+
+            clocks = <&osc 0>;
+            #clock-cells = <0>;
+            clock-output-names = "bd73800-32k-out";
+
+            gpio-controller;
+            #gpio-cells = <2>;
+
+            rohm,pin-gpio1 = "gpo";
+            rohm,pin-exten = "gpi";
+
+            regulators {
+                buck1: buck1 {
+                    regulator-name = "buck1";
+                    regulator-min-microvolt = <800000>;
+                    regulator-max-microvolt = <2000000>;
+                    regulator-always-on;
+                    regulator-ramp-delay = <1250>;
+                    rohm,dvs-run-voltage = <1150000>;
+                    rohm,dvs-suspend-voltage = <950000>;
+                };
+                buck2: buck2 {
+                    regulator-name = "buck2";
+                    regulator-min-microvolt = <800000>;
+                    regulator-max-microvolt = <2000000>;
+                    regulator-always-on;
+                    regulator-ramp-delay = <1250>;
+                    rohm,dvs-run-voltage = <1150000>;
+                    rohm,dvs-suspend-voltage = <950000>;
+                };
+                buck3: buck3 {
+                    regulator-name = "buck3";
+                    regulator-min-microvolt = <1200000>;
+                    regulator-max-microvolt = <2700000>;
+                    rohm,dvs-run-voltage = <1150000>;
+                    rohm,dvs-idle-voltage = <1100000>;
+                    rohm,dvs-suspend-voltage = <950000>;
+                    regulator-always-on;
+                };
+                buck4: buck4 {
+                    regulator-name = "buck4";
+                    regulator-min-microvolt = <1100000>;
+                    regulator-max-microvolt = <1850000>;
+                    regulator-always-on;
+                };
+                buck5: buck5 {
+                    regulator-name = "buck5";
+                    regulator-min-microvolt = <1800000>;
+                    regulator-max-microvolt = <3300000>;
+                    regulator-always-on;
+                };
+                buck6: buck6 {
+                    regulator-name = "buck6";
+                    regulator-min-microvolt = <1800000>;
+                    regulator-max-microvolt = <3300000>;
+                    regulator-always-on;
+                };
+                buck7: buck7 {
+                    regulator-name = "buck7";
+                    regulator-min-microvolt = <1800000>;
+                    regulator-max-microvolt = <3300000>;
+                    regulator-always-on;
+                };
+                buck8: buck8 {
+                    regulator-name = "buck8";
+                    regulator-min-microvolt = <500000>;
+                    regulator-max-microvolt = <1300000>;
+                    regulator-always-on;
+                };
+                ldo1: ldo1 {
+                    regulator-name = "ldo1";
+                    rohm,ldo-range-high;
+                    regulator-min-microvolt = <800000>;
+                    regulator-max-microvolt = <3300000>;
+                    regulator-always-on;
+                };
+                ldo2: ldo2 {
+                    regulator-name = "ldo2";
+                    regulator-min-microvolt = <800000>;
+                    regulator-max-microvolt = <3300000>;
+                    regulator-always-on;
+                };
+                ldo3: ldo3 {
+                    regulator-name = "ldo3";
+                    regulator-min-microvolt = <800000>;
+                    regulator-max-microvolt = <3300000>;
+                    regulator-always-on;
+                };
+                ldo4: ldo4 {
+                    regulator-name = "ldo4";
+                    regulator-min-microvolt = <650000>;
+                    regulator-max-microvolt = <1750000>;
+                    regulator-always-on;
+                };
+            };
+        };
+    };
-- 
2.54.0


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