Support ROHM BD96801 Scalable PMIC

new file mode 100644
index 000000000000..b3d2d7d583ce
@@ -0,0 +1,63 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/regulator/rohm,bd96801-regulator.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: ROHM BD96801 Power Management Integrated Circuit regulators
+
+maintainers:
+  - Matti Vaittinen <[email protected]>
+
+description:
+  This module is part of the ROHM BD96801 MFD device. For more details
+  see Documentation/devicetree/bindings/mfd/rohm,bd96801-pmic.yaml.
+
+  The regulator controller is represented as a sub-node of the PMIC node
+  on the device tree.
+
+  Regulator nodes should be named to buck_<number> and ldo_<number>.
+  The valid names for BD96801 regulator nodes are
+  buck1, buck2, buck3, buck4, ldo5, ldo6, ldo7
+
+patternProperties:
+  "^ldo[5-7]$":
+    type: object
+    description:
+      Properties for single LDO regulator.
+    $ref: regulator.yaml#
+
+    properties:
+      rohm,initial-voltage-microvolt:
+        description:
+          Initial voltage for regulator. Voltage can be tuned +/-150 mV from
+          this value. NOTE, This can be modified via I2C only when PMIC is in
+          STBY state.
+        minimum: 300000
+        maximum: 3300000
+
+    unevaluatedProperties: false
+
+  "^buck[1-4]$":
+    type: object
+    description:
+      Properties for single BUCK regulator.
+    $ref: regulator.yaml#
+
+    properties:
+      rohm,initial-voltage-microvolt:
+        description:
+          Initial voltage for regulator. Voltage can be tuned +/-150 mV from
+          this value. NOTE, This can be modified via I2C only when PMIC is in
+          STBY state.
+        minimum: 500000
+        maximum: 3300000
+
+      rohm,keep-on-stby:
+        description:
+          Keep the regulator powered when PMIC transitions to STBY state.
+        type: boolean
+
+    unevaluatedProperties: false
+
+additionalProperties: false

new file mode 100644
index 000000000000..d381125a0a15
@@ -0,0 +1,173 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mfd/rohm,bd96801-pmic.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: ROHM BD96801 Scalable Power Management Integrated Circuit
+
+maintainers:
+  - Matti Vaittinen <[email protected]>
+
+description:
+  BD96801 is an automotive grade single-chip power management IC.
+  It integrates 4 buck converters and 3 LDOs with safety features like
+  over-/under voltage and over current detection and a watchdog.
+
+properties:
+  compatible:
+    const: rohm,bd96801
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    description:
+      The PMIC provides intb and errb IRQ lines. The errb IRQ line is used
+      for fatal IRQs which will cause the PMIC to shut down power outputs.
+      In many systems this will shut down the SoC contolling the PMIC and
+      connecting/handling the errb can be omitted. However, there are cases
+      where the SoC is not powered by the PMIC or has a short time backup
+      energy to handle shutdown of critical hardware. In that case it may be
+      useful to connect the errb and handle errb events.
+    minItems: 1
+    maxItems: 2
+
+  interrupt-names:
+    minItems: 1
+    items:
+      - enum: [intb, errb]
+      - const: errb
+
+  rohm,hw-timeout-ms:
+    description:
+      Watchdog timeout value(s). First walue is timeout limit. Second value is
+      optional value for 'too early' watchdog ping if window timeout mode is
+      to be used.
+    minItems: 1
+    maxItems: 2
+
+  rohm,wdg-action:
+    description:
+      Whether the watchdog failure must turn off the regulator power outputs or
+      just toggle the INTB line.
+    enum:
+      - prstb
+      - intb-only
+
+  timeout-sec:
+    maxItems: 2
+
+  regulators:
+    $ref: /schemas/regulator/rohm,bd96801-regulator.yaml
+    description:
+      List of child nodes that specify the regulators.
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - interrupt-names
+  - 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@60 {
+            reg = <0x60>;
+            compatible = "rohm,bd96801";
+            interrupt-parent = <&gpio1>;
+            interrupts = <29 IRQ_TYPE_LEVEL_LOW>, <6 IRQ_TYPE_LEVEL_LOW>;
+            interrupt-names = "intb", "errb";
+
+            regulators {
+                buck1 {
+                    regulator-name = "buck1";
+                    regulator-ramp-delay = <1250>;
+                    /* 0.5V min INITIAL - 150 mV tune */
+                    regulator-min-microvolt = <350000>;
+                    /* 3.3V + 150mV tune */
+                    regulator-max-microvolt = <3450000>;
+
+                    /* These can be set only when PMIC is in STBY */
+                    rohm,initial-voltage-microvolt = <500000>;
+                    regulator-ov-error-microvolt = <230000>;
+                    regulator-uv-error-microvolt = <230000>;
+                    regulator-temp-protection-kelvin = <1>;
+                    regulator-temp-warn-kelvin = <0>;
+                };
+                buck2 {
+                    regulator-name = "buck2";
+                    regulator-min-microvolt = <350000>;
+                    regulator-max-microvolt = <3450000>;
+
+                    rohm,initial-voltage-microvolt = <3000000>;
+                    regulator-ov-error-microvolt = <18000>;
+                    regulator-uv-error-microvolt = <18000>;
+                    regulator-temp-protection-kelvin = <1>;
+                    regulator-temp-warn-kelvin = <1>;
+                };
+                buck3 {
+                    regulator-name = "buck3";
+                    regulator-min-microvolt = <350000>;
+                    regulator-max-microvolt = <3450000>;
+
+                    rohm,initial-voltage-microvolt = <600000>;
+                    regulator-ov-warn-microvolt = <18000>;
+                    regulator-uv-warn-microvolt = <18000>;
+                    regulator-temp-protection-kelvin = <1>;
+                    regulator-temp-error-kelvin = <0>;
+                };
+                buck4 {
+                    regulator-name = "buck4";
+                    regulator-min-microvolt = <350000>;
+                    regulator-max-microvolt = <3450000>;
+
+                    rohm,initial-voltage-microvolt = <600000>;
+                    regulator-ov-warn-microvolt = <18000>;
+                    regulator-uv-warn-microvolt = <18000>;
+                    regulator-temp-protection-kelvin = <1>;
+                    regulator-temp-error-kelvin = <0>;
+                };
+                ldo5 {
+                    regulator-name = "ldo5";
+                    regulator-min-microvolt = <300000>;
+                    regulator-max-microvolt = <3300000>;
+
+                    rohm,initial-voltage-microvolt = <500000>;
+                    regulator-ov-error-microvolt = <36000>;
+                    regulator-uv-error-microvolt = <34000>;
+                    regulator-temp-protection-kelvin = <1>;
+                    regulator-temp-warn-kelvin = <0>;
+                };
+                ldo6 {
+                    regulator-name = "ldo6";
+                    regulator-min-microvolt = <300000>;
+                    regulator-max-microvolt = <3300000>;
+
+                    rohm,initial-voltage-microvolt = <300000>;
+                    regulator-ov-error-microvolt = <36000>;
+                    regulator-uv-error-microvolt = <34000>;
+                    regulator-temp-protection-kelvin = <1>;
+                    regulator-temp-warn-kelvin = <0>;
+                };
+                ldo7 {
+                    regulator-name = "ldo7";
+                    regulator-min-microvolt = <300000>;
+                    regulator-max-microvolt = <3300000>;
+
+                    rohm,initial-voltage-microvolt = <500000>;
+                    regulator-ov-error-microvolt = <36000>;
+                    regulator-uv-error-microvolt = <34000>;
+                    regulator-temp-protection-kelvin = <1>;
+                    regulator-temp-warn-kelvin = <0>;
+                };
+            };
+        };
+    };

index 266b4f54af60..68cc7af9ef97 100644
@@ -2089,6 +2089,19 @@ config MFD_ROHM_BD957XMUF
 	  BD9573MUF Power Management ICs. BD9576 and BD9573 are primarily
 	  designed to be used to power R-Car series processors.
 
+config MFD_ROHM_BD96801
+	tristate "ROHM BD96801 Power Management IC"
+	depends on I2C=y
+	depends on OF
+	select REGMAP_I2C
+	select REGMAP_IRQ
+	select MFD_CORE
+	help
+	  Select this option to get support for the ROHM BD96801 Power
+	  Management IC. The ROHM BD96801 is a highly scalable Power Management
+	  IC for industrial and automotive use. The BD96801 can be used as a
+	  master PMIC in a chained PMIC solution with suitable companion PMICs.
+
 config MFD_STM32_LPTIMER
 	tristate "Support for STM32 Low-Power Timer"
 	depends on (ARCH_STM32 && OF) || COMPILE_TEST

index c66f07edcd0e..e792892d4a8b 100644
@@ -264,6 +264,7 @@ obj-$(CONFIG_RAVE_SP_CORE)	+= rave-sp.o
 obj-$(CONFIG_MFD_ROHM_BD71828)	+= rohm-bd71828.o
 obj-$(CONFIG_MFD_ROHM_BD718XX)	+= rohm-bd718x7.o
 obj-$(CONFIG_MFD_ROHM_BD957XMUF)	+= rohm-bd9576.o
+obj-$(CONFIG_MFD_ROHM_BD96801)	+= rohm-bd96801.o
 obj-$(CONFIG_MFD_STMFX) 	+= stmfx.o
 obj-$(CONFIG_MFD_KHADAS_MCU) 	+= khadas-mcu.o
 obj-$(CONFIG_MFD_ACER_A500_EC)	+= acer-ec-a500.o

index d333be2bea3b..88b8c1a23bcf 100644
@@ -268,6 +268,18 @@ config REGULATOR_BD957XMUF
 	  This driver can also be built as a module. If so, the module
 	  will be called bd9576-regulator.
 
+config REGULATOR_BD96801
+	tristate "ROHM BD96801 Power Regulator"
+	depends on MFD_ROHM_BD96801
+	select REGULATOR_ROHM
+	help
+	  This driver supports voltage regulators on ROHM BD96801 PMIC.
+	  This will enable support for the software controllable buck
+	  and LDO regulators.
+
+	  This driver can also be built as a module. If so, the module
+	  will be called bd96801-regulator.
+
 config REGULATOR_CPCAP
 	tristate "Motorola CPCAP regulator"
 	depends on MFD_CPCAP

index ba15fa5f30ad..cde21dcb8eca 100644
@@ -37,6 +37,8 @@ obj-$(CONFIG_REGULATOR_BD718XX) += bd718x7-regulator.o
 obj-$(CONFIG_REGULATOR_BD9571MWV) += bd9571mwv-regulator.o
 obj-$(CONFIG_REGULATOR_BD957XMUF) += bd9576-regulator.o
 obj-$(CONFIG_REGULATOR_DA903X)	+= da903x-regulator.o
+obj-$(CONFIG_REGULATOR_BD96801) += bd96801-regulator.o
+obj-$(CONFIG_REGULATOR_DA903X)	+= da903x.o
 obj-$(CONFIG_REGULATOR_DA9052)	+= da9052-regulator.o
 obj-$(CONFIG_REGULATOR_DA9055)	+= da9055-regulator.o
 obj-$(CONFIG_REGULATOR_DA9062)	+= da9062-regulator.o

index 85eea38dbdf4..ceb3431f23b8 100644
@@ -181,6 +181,19 @@ config BD957XMUF_WATCHDOG
 	  watchdog. Alternatively say M to compile the driver as a module,
 	  which will be called bd9576_wdt.
 
+config BD96801_WATCHDOG
+	tristate "ROHM BD96801 PMIC Watchdog"
+	depends on MFD_ROHM_BD96801
+	select WATCHDOG_CORE
+	help
+	  Support for the watchdog in the ROHM BD96801 PMIC. Watchdog can be
+	  configured to only generate IRQ or to trigger system reset via reset
+	  pin.
+
+	  Say Y here to include support for the ROHM BD96801 watchdog.
+	  Alternatively say M to compile the driver as a module,
+	  which will be called bd96801_wdt.
+
 config CROS_EC_WATCHDOG
 	tristate "ChromeOS EC-based watchdog"
 	select WATCHDOG_CORE

index 2d1117564f5b..b51030f035a6 100644
@@ -218,6 +218,7 @@ obj-$(CONFIG_XEN_WDT) += xen_wdt.o
 
 # Architecture Independent
 obj-$(CONFIG_BD957XMUF_WATCHDOG) += bd9576_wdt.o
+obj-$(CONFIG_BD96801_WATCHDOG) += bd96801_wdt.o
 obj-$(CONFIG_CROS_EC_WATCHDOG) += cros_ec_wdt.o
 obj-$(CONFIG_DA9052_WATCHDOG) += da9052_wdt.o
 obj-$(CONFIG_DA9055_WATCHDOG) += da9055_wdt.o

index d6c90161c7bf..dc79a45c763e 100644
@@ -19446,17 +19446,21 @@ F:	drivers/gpio/gpio-bd71828.c
 F:	drivers/mfd/rohm-bd71828.c
 F:	drivers/mfd/rohm-bd718x7.c
 F:	drivers/mfd/rohm-bd9576.c
+F:	drivers/mfd/rohm-bd96801.c
 F:	drivers/regulator/bd71815-regulator.c
 F:	drivers/regulator/bd71828-regulator.c
 F:	drivers/regulator/bd718x7-regulator.c
 F:	drivers/regulator/bd9576-regulator.c
+F:	drivers/regulator/bd96801-regulator.c
 F:	drivers/regulator/rohm-regulator.c
 F:	drivers/rtc/rtc-bd70528.c
 F:	drivers/watchdog/bd9576_wdt.c
+F:	drivers/watchdog/bd96801_wdt.c
 F:	include/linux/mfd/rohm-bd71815.h
 F:	include/linux/mfd/rohm-bd71828.h
 F:	include/linux/mfd/rohm-bd718x7.h
 F:	include/linux/mfd/rohm-bd957x.h
+F:	include/linux/mfd/rohm-bd96801.h
 F:	include/linux/mfd/rohm-generic.h
 F:	include/linux/mfd/rohm-shared.h