From: ChiYuan Huang
Adds support for the RT4801 DSV. It has two regulators (DSVP/DSVN) with an I2C
interface. DSVP/DSVN can provide the display panel module for the
positive/negative
voltage range from (+/-)4V to (+/-)6V.
---
.../regulator/richtek,rt4801-regulator.yaml| 80
drivers/regulator/Kconfig | 7 +
drivers/regulator/Makefile | 1 +
drivers/regulator/rt4801-regulator.c | 223 +
4 files changed, 311 insertions(+)
create mode 100644
Documentation/devicetree/bindings/regulator/richtek,rt4801-regulator.yaml
create mode 100644 drivers/regulator/rt4801-regulator.c
diff --git
a/Documentation/devicetree/bindings/regulator/richtek,rt4801-regulator.yaml
b/Documentation/devicetree/bindings/regulator/richtek,rt4801-regulator.yaml
new file mode 100644
index ..28d30e2
--- /dev/null
+++ b/Documentation/devicetree/bindings/regulator/richtek,rt4801-regulator.yaml
@@ -0,0 +1,80 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/regulator/richtek,rt4801-regulator.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Richtek RT4801 Display Bias regulators
+
+maintainers:
+ - ChiYuan Huang
+
+description: |
+ Regulator nodes should be named to DSVP and DSVN. The
+ definition for each of these nodes is defined using the standard
+ binding for regulators at
+ Documentation/devicetree/bindings/regulator/regulator.txt.
+ Datasheet is available at
+ https://www.richtek.com/assets/product_file/RT4801H/DS4801H-00.pdf
+
+#The valid names for RT4801 regulator nodes are:
+#DSVP, DSVN
+
+properties:
+ compatible:
+enum:
+ - richtek,rt4801
+
+ reg:
+maxItems: 1
+
+ enable-gpios:
+description: GPIOs to use to enable DSVP/DSVN regulator.
+ The first one is ENP to enable DSVP, and second one is ENM to enable
DSVN.
+ Number of GPIO in the array list could be 1 or 2.
+ If only one gpio is specified, only one gpio used to control ENP/ENM.
+ Else both are spefied, DSVP/DSVN could be controlled individually.
+ Othersie, this property not specified. treat both as always-on regulator.
+minItems: 1
+maxItems: 2
+
+patternProperties:
+ "^DSV(P|N)$":
+type: object
+$ref: regulator.yaml#
+description:
+ Properties for single display bias regulator.
+
+required:
+ - compatible
+ - reg
+
+additionalProperties:
+ - enable-gpios
+
+examples:
+ - |
+i2c {
+#address-cells = <1>;
+#size-cells = <0>;
+
+rt4801@73 {
+compatible = "richtek,rt4801";
+reg = <0x73>;
+enable-gpios = < 2 0>, < 3 0>;
+
+dsvp: DSVP {
+regulator-name = "rt4801,dsvp";
+regulator-min-microvolt = <400>;
+regulator-max-microvolt = <600>;
+regulator-boot-on;
+};
+dsvn: DSVN {
+regulator-name = "rt4801,dsvn";
+regulator-min-microvolt = <400>;
+regulator-max-microvolt = <600>;
+regulator-boot-on;
+};
+
+};
+};
diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig
index de17ef7..2786f11 100644
--- a/drivers/regulator/Kconfig
+++ b/drivers/regulator/Kconfig
@@ -894,6 +894,13 @@ config REGULATOR_RN5T618
config REGULATOR_ROHM
tristate
+config REGULATOR_RT4801
+ tristate "Richtek RT4801 Regulators"
+ depends on I2C
+ help
+ This adds support for voltage regulators in Richtek RT4801 Display
Bias IC.
+ The device supports two regulators (DSVP/DSVN).
+
config REGULATOR_RT5033
tristate "Richtek RT5033 Regulators"
depends on MFD_RT5033
diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile
index d8d3ecf..d091e52d 100644
--- a/drivers/regulator/Makefile
+++ b/drivers/regulator/Makefile
@@ -111,6 +111,7 @@ obj-$(CONFIG_REGULATOR_RC5T583) += rc5t583-regulator.o
obj-$(CONFIG_REGULATOR_RK808) += rk808-regulator.o
obj-$(CONFIG_REGULATOR_RN5T618) += rn5t618-regulator.o
obj-$(CONFIG_REGULATOR_ROHM) += rohm-regulator.o
+obj-$(CONFIG_REGULATOR_RT4801) += rt4801-regulator.o
obj-$(CONFIG_REGULATOR_RT5033) += rt5033-regulator.o
obj-$(CONFIG_REGULATOR_S2MPA01) += s2mpa01.o
obj-$(CONFIG_REGULATOR_S2MPS11) += s2mps11.o
diff --git a/drivers/regulator/rt4801-regulator.c
b/drivers/regulator/rt4801-regulator.c
new file mode 100644
index ..0ddc670
--- /dev/null
+++ b/drivers/regulator/rt4801-regulator.c
@@ -0,0 +1,223 @@
+// SPDX-License-Identifier: GPL-2.0+
+
+#include
+#include
+#include
+#include
+#include
+#include
+#include
+
+#define RT4801_REG_VOP 0x00
+#define RT4801_REG_VON 0x01
+#define RT4801_REG_APPS0x03
+
+#define VOUT_MASK 0x1F
+
+#define MIN_UV 400
+#define STEP_UV10
+#define MAX_UV 600
