[PATCH v8 0/7] Add support for Maxim Integrated MAX77705 PMIC

[PATCH v8 0/7] Add support for Maxim Integrated MAX77705 PMIC

[Dzmitry Sankouski]

The Maxim MAX77705 is a Companion Power Management and Type-C
interface IC which includes charger, fuelgauge, LED, haptic motor driver and
Type-C management IC. It's used in Samsung S series smart phones
starting from S9 model.

Add features:
  - charger
  - fuelgauge
  - haptic
  - led

Signed-off-by: Dzmitry Sankouski <dsankouski@gmail.com>
---
Changes in v8:
- Fix comment style
- join line where possible to fit in 100 chars
- Link to v7: https://lore.kernel.org/r/20241023-starqltechn_integration_upstream-v7-0-9bfaa3f4a1a0@gmail.com

Changes in v7:
- Fix review comments
- Link to v6: https://lore.kernel.org/r/20241007-starqltechn_integration_upstream-v6-0-0d38b5090c57@gmail.com

Changes in v6:
- fix binding review comments
- update trailers
- Link to v5: https://lore.kernel.org/r/20240617-starqltechn_integration_upstream-v5-0-e0033f141d17@gmail.com

Changes in v5:
- Split patchset per subsystem
- Link to v4: https://lore.kernel.org/r/20240913-starqltechn_integration_upstream-v4-0-2d2efd5c5877@gmail.com

Changes in v4:
- Rewrite max77705, max77705_charger, max77705_fuel_gauge from scratch
- Reorder patches:
  - squash max77705 subdevice bindings in core file because
    no resources there
  - split device tree changes
- Use _ as space for filenames in power/supply like the majority
- Link to v3: https://lore.kernel.org/r/20240618-starqltechn_integration_upstream-v3-0-e3f6662017ac@gmail.com

---
Dzmitry Sankouski (7):
      power: supply: add undervoltage health status property
      dt-bindings: mfd: add maxim,max77705
      mfd: Add new driver for MAX77705 PMIC
      input: max77693: add max77705 haptic support
      power: supply: max77705: Add charger driver for Maxim 77705
      power: supply: max77705: Add fuel gauge driver for Maxim 77705
      leds: max77705: Add LEDs support

 Documentation/ABI/testing/sysfs-class-power               |   2 +-
 Documentation/devicetree/bindings/mfd/maxim,max77705.yaml | 174 ++++++++++++++++++++++++++++++++++++
 MAINTAINERS                                               |   4 +
 drivers/input/misc/Kconfig                                |   4 +-
 drivers/input/misc/Makefile                               |   1 +
 drivers/input/misc/max77693-haptic.c                      |  15 +++-
 drivers/leds/Kconfig                                      |   6 ++
 drivers/leds/Makefile                                     |   1 +
 drivers/leds/leds-max77705.c                              | 167 ++++++++++++++++++++++++++++++++++
 drivers/mfd/Kconfig                                       |  12 +++
 drivers/mfd/Makefile                                      |   2 +
 drivers/mfd/max77705.c                                    | 222 +++++++++++++++++++++++++++++++++++++++++++++
 drivers/power/supply/Kconfig                              |  13 +++
 drivers/power/supply/Makefile                             |   2 +
 drivers/power/supply/max77705_charger.c                   | 598 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 drivers/power/supply/max77705_fuel_gauge.c                | 363 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 drivers/power/supply/power_supply_sysfs.c                 |   1 +
 include/linux/mfd/max77693-common.h                       |   5 +-
 include/linux/mfd/max77705-private.h                      | 199 +++++++++++++++++++++++++++++++++++++++++
 include/linux/power/max77705_charger.h                    | 216 ++++++++++++++++++++++++++++++++++++++++++++
 include/linux/power/max77705_fuelgauge.h                  |  71 +++++++++++++++
 include/linux/power_supply.h                              |   1 +
 22 files changed, 2074 insertions(+), 5 deletions(-)
---
base-commit: 86e3904dcdc7e70e3257fc1de294a1b75f3d8d04
change-id: 20240617-starqltechn_integration_upstream-bc86850b2fe3

Best regards,
-- 
Dzmitry Sankouski <dsankouski@gmail.com>

[PATCH v8 1/7] power: supply: add undervoltage health status property

[Dzmitry Sankouski]

Add POWER_SUPPLY_HEALTH_UNDERVOLTAGE status for power supply
to report under voltage lockout failures.

Signed-off-by: Dzmitry Sankouski <dsankouski@gmail.com>
---
Changes for v5:
- update Documentation/ABI/testing/sysfs-class-power and
  drivers/power/supply/power_supply_sysfs.c
---
 Documentation/ABI/testing/sysfs-class-power | 2 +-
 drivers/power/supply/power_supply_sysfs.c   | 1 +
 include/linux/power_supply.h                | 1 +
 3 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/Documentation/ABI/testing/sysfs-class-power b/Documentation/ABI/testing/sysfs-class-power
index 45180b62d426..32c018c5d088 100644
--- a/Documentation/ABI/testing/sysfs-class-power
+++ b/Documentation/ABI/testing/sysfs-class-power
@@ -433,7 +433,7 @@ Description:
 
 		Valid values:
 			      "Unknown", "Good", "Overheat", "Dead",
-			      "Over voltage", "Unspecified failure", "Cold",
+			      "Over voltage", "Under voltage", "Unspecified failure", "Cold",
 			      "Watchdog timer expire", "Safety timer expire",
 			      "Over current", "Calibration required", "Warm",
 			      "Cool", "Hot", "No battery"
diff --git a/drivers/power/supply/power_supply_sysfs.c b/drivers/power/supply/power_supply_sysfs.c
index 571de43fcca9..247c2910ba34 100644
--- a/drivers/power/supply/power_supply_sysfs.c
+++ b/drivers/power/supply/power_supply_sysfs.c
@@ -99,6 +99,7 @@ static const char * const POWER_SUPPLY_HEALTH_TEXT[] = {
 	[POWER_SUPPLY_HEALTH_OVERHEAT]		    = "Overheat",
 	[POWER_SUPPLY_HEALTH_DEAD]		    = "Dead",
 	[POWER_SUPPLY_HEALTH_OVERVOLTAGE]	    = "Over voltage",
+	[POWER_SUPPLY_HEALTH_UNDERVOLTAGE]	    = "Under voltage",
 	[POWER_SUPPLY_HEALTH_UNSPEC_FAILURE]	    = "Unspecified failure",
 	[POWER_SUPPLY_HEALTH_COLD]		    = "Cold",
 	[POWER_SUPPLY_HEALTH_WATCHDOG_TIMER_EXPIRE] = "Watchdog timer expire",
diff --git a/include/linux/power_supply.h b/include/linux/power_supply.h
index b98106e1a90f..e96d262f3c2b 100644
--- a/include/linux/power_supply.h
+++ b/include/linux/power_supply.h
@@ -58,6 +58,7 @@ enum {
 	POWER_SUPPLY_HEALTH_OVERHEAT,
 	POWER_SUPPLY_HEALTH_DEAD,
 	POWER_SUPPLY_HEALTH_OVERVOLTAGE,
+	POWER_SUPPLY_HEALTH_UNDERVOLTAGE,
 	POWER_SUPPLY_HEALTH_UNSPEC_FAILURE,
 	POWER_SUPPLY_HEALTH_COLD,
 	POWER_SUPPLY_HEALTH_WATCHDOG_TIMER_EXPIRE,

-- 
2.39.2

[PATCH v8 2/7] dt-bindings: mfd: add maxim,max77705

[Dzmitry Sankouski]

Add maxim,max77705 core binding part.

Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Signed-off-by: Dzmitry Sankouski <dsankouski@gmail.com>
---
Changes in v8:
- fix leds compatible

Changes in v6:
- unevaluatedProperties must be false
- drop excessive sentence from description,
  just describe the device
- change leds compatible to maxim,max77705-rgb

Changes in v5:
- formatting changes
- add unevaluatedProperties: false for nodes referencing
  common schemas
- remove additionalProperties on nodes with
  unevaluatedProperties: false
- add min and max to led index
Changes in v4:
- change dts example intendation from tabs
 to spaces
- remove interrupt-names property
- remove obvious reg description
- split long(>80) lines
---
 Documentation/devicetree/bindings/mfd/maxim,max77705.yaml | 174 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 MAINTAINERS                                               |   1 +
 2 files changed, 175 insertions(+)

diff --git a/Documentation/devicetree/bindings/mfd/maxim,max77705.yaml b/Documentation/devicetree/bindings/mfd/maxim,max77705.yaml
new file mode 100644
index 000000000000..5e7bb837c9f3
--- /dev/null
+++ b/Documentation/devicetree/bindings/mfd/maxim,max77705.yaml
@@ -0,0 +1,174 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mfd/maxim,max77705.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Maxim MAX77705 Companion Power Management IC and USB Type-C interface IC
+
+maintainers:
+  - Dzmitry Sankouski <dsankouski@gmail.com>
+
+description: |
+  The Maxim MAX77705 is a Companion Power Management and Type-C
+  interface IC which includes charger, fuelgauge, LED, haptic motor driver and
+  Type-C management IC.
+
+properties:
+  compatible:
+    const: maxim,max77705
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  charger:
+    $ref: /schemas/power/supply/power-supply.yaml
+    unevaluatedProperties: false
+    properties:
+      compatible:
+        const: maxim,max77705-charger
+
+    required:
+      - compatible
+      - monitored-battery
+
+  fuel-gauge:
+    $ref: /schemas/power/supply/power-supply.yaml
+    type: object
+    unevaluatedProperties: false
+    description: MAX77705 fuel gauge with ModelGauge m5 EZ algorithm support.
+
+    properties:
+      compatible:
+        const: maxim,max77705-fuel-gauge
+
+      shunt-resistor-micro-ohms:
+        description:
+          The value of current sense resistor in microohms.
+
+    required:
+      - compatible
+      - shunt-resistor-micro-ohms
+      - monitored-battery
+      - power-supplies
+
+  haptic:
+    type: object
+    additionalProperties: false
+
+    properties:
+      compatible:
+        const: maxim,max77705-haptic
+
+      haptic-supply: true
+
+      pwms:
+        maxItems: 1
+
+    required:
+      - compatible
+      - haptic-supply
+      - pwms
+
+  leds:
+    type: object
+    additionalProperties: false
+    description:
+      Up to 4 LEDs supported. One LED is represented by one child node.
+
+    properties:
+      compatible:
+        const: maxim,max77705-rgb
+
+      "#address-cells":
+        const: 1
+
+      "#size-cells":
+        const: 0
+
+    patternProperties:
+      "^led@[0-3]$":
+        $ref: /schemas/leds/common.yaml#
+        type: object
+        unevaluatedProperties: false
+
+        properties:
+          reg:
+            description: LED index.
+            minimum: 0
+            maximum: 3
+
+        required:
+          - reg
+
+    required:
+      - compatible
+      - "#address-cells"
+      - "#size-cells"
+
+required:
+  - compatible
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+    #include <dt-bindings/leds/common.h>
+
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        pmic@66 {
+            compatible = "maxim,max77705";
+            reg = <0x66>;
+            interrupt-parent = <&pm8998_gpios>;
+            interrupts = <11 IRQ_TYPE_LEVEL_LOW>;
+            pinctrl-0 = <&chg_int_default>;
+            pinctrl-names = "default";
+
+            leds {
+                compatible = "maxim,max77705-rgb";
+                #address-cells = <1>;
+                #size-cells = <0>;
+
+                led@1 {
+                    reg = <1>;
+                    label = "red:usr1";
+                };
+
+                led@2 {
+                    reg = <2>;
+                    label = "green:usr2";
+                };
+
+                led@3 {
+                    reg = <3>;
+                    label = "blue:usr3";
+                };
+            };
+
+            max77705_charger: charger {
+                compatible = "maxim,max77705-charger";
+                monitored-battery = <&battery>;
+            };
+
+            fuel-gauge {
+                compatible = "maxim,max77705-fuel-gauge";
+                monitored-battery = <&battery>;
+                power-supplies = <&max77705_charger>;
+                shunt-resistor-micro-ohms = <5000>;
+            };
+
+
+            haptic {
+                compatible = "maxim,max77705-haptic";
+                haptic-supply = <&vib_regulator>;
+                pwms = <&vib_pwm 0 50000>;
+            };
+        };
+    };
diff --git a/MAINTAINERS b/MAINTAINERS
index 3b9c6763f679..e92160703880 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -14131,6 +14131,7 @@ B:	mailto:linux-samsung-soc@vger.kernel.org
 F:	Documentation/devicetree/bindings/*/maxim,max14577.yaml
 F:	Documentation/devicetree/bindings/*/maxim,max77686.yaml
 F:	Documentation/devicetree/bindings/*/maxim,max77693.yaml
+F:	Documentation/devicetree/bindings/*/maxim,max77705*.yaml
 F:	Documentation/devicetree/bindings/*/maxim,max77843.yaml
 F:	Documentation/devicetree/bindings/clock/maxim,max77686.txt
 F:	drivers/*/*max77843.c

-- 
2.39.2

[PATCH v8 3/7] mfd: Add new driver for MAX77705 PMIC

[Dzmitry Sankouski]

Add the core MFD driver for max77705 PMIC. We define five sub-devices
for which the drivers will be added in subsequent patches.

Signed-off-by: Dzmitry Sankouski <dsankouski@gmail.com>

---
Changes for v8:
- fix comment style C++ -> C
- remove unused pmic_ver

Changes for v6:
- add PMIC suffix in Kconfig
- remove filename from file header
- reorder headers alphabetically
- move out fg and chg adresses definitions
- rename led name and compatible
- remove overbracketing
- move charger and fuel gauge i2c initialization
  to their drivers
- fix max77705_i2c_driver tabbing
- formatting fixes
Changes for v5:
- license change to 2.0
- use same hardware name in Kconfig and module descriptions
Changes for v4:
- rework driver from scratch
- migrate to regmap_add_irq_chip, remove max77705-irq.c,
  rename max77705-core.c to max77705.c
- cleanup headers
- remove debugfs code
- migrate to use max77693_dev structure
- remove max77705.h
---
 MAINTAINERS                          |   2 ++
 drivers/mfd/Kconfig                  |  12 ++++++++
 drivers/mfd/Makefile                 |   2 ++
 drivers/mfd/max77705.c               | 222 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 include/linux/mfd/max77693-common.h  |   5 +++-
 include/linux/mfd/max77705-private.h | 181 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 6 files changed, 423 insertions(+), 1 deletion(-)

diff --git a/MAINTAINERS b/MAINTAINERS
index e92160703880..126f2fef0a6d 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -14138,6 +14138,7 @@ F:	drivers/*/*max77843.c
 F:	drivers/*/max14577*.c
 F:	drivers/*/max77686*.c
 F:	drivers/*/max77693*.c
+F:	drivers/*/max77705*.c
 F:	drivers/clk/clk-max77686.c
 F:	drivers/extcon/extcon-max14577.c
 F:	drivers/extcon/extcon-max77693.c
@@ -14145,6 +14146,7 @@ F:	drivers/rtc/rtc-max77686.c
 F:	include/linux/mfd/max14577*.h
 F:	include/linux/mfd/max77686*.h
 F:	include/linux/mfd/max77693*.h
+F:	include/linux/mfd/max77705*.h
 
 MAXIRADIO FM RADIO RECEIVER DRIVER
 M:	Hans Verkuil <hverkuil@xs4all.nl>
diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index 03c1e4e3eea4..9bb19716d5cf 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -916,6 +916,18 @@ config MFD_MAX77693
 	  additional drivers must be enabled in order to use the functionality
 	  of the device.
 
+config MFD_MAX77705
+	tristate "Maxim MAX77705 PMIC Support"
+	depends on I2C
+	select MFD_CORE
+	help
+	  Say yes here to add support for Maxim Integrated MAX77705 PMIC.
+	  This is a Power Management IC with Charger, safe LDOs, Flash, Haptic
+	  and MUIC controls on chip.
+	  This driver provides common support for accessing the device;
+	  additional drivers must be enabled in order to use the functionality
+	  of the device.
+
 config MFD_MAX77714
 	tristate "Maxim Semiconductor MAX77714 PMIC Support"
 	depends on I2C
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index e057d6d6faef..d981690b5a12 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -168,6 +168,7 @@ obj-$(CONFIG_MFD_MAX77620)	+= max77620.o
 obj-$(CONFIG_MFD_MAX77650)	+= max77650.o
 obj-$(CONFIG_MFD_MAX77686)	+= max77686.o
 obj-$(CONFIG_MFD_MAX77693)	+= max77693.o
+obj-$(CONFIG_MFD_MAX77705)	+= max77705.o
 obj-$(CONFIG_MFD_MAX77714)	+= max77714.o
 obj-$(CONFIG_MFD_MAX77843)	+= max77843.o
 obj-$(CONFIG_MFD_MAX8907)	+= max8907.o
@@ -233,6 +234,7 @@ obj-$(CONFIG_MFD_RK8XX_I2C)	+= rk8xx-i2c.o
 obj-$(CONFIG_MFD_RK8XX_SPI)	+= rk8xx-spi.o
 obj-$(CONFIG_MFD_RN5T618)	+= rn5t618.o
 obj-$(CONFIG_MFD_SEC_CORE)	+= sec-core.o sec-irq.o
+obj-$(CONFIG_MFD_S2DOS05)	+= s2dos05.o
 obj-$(CONFIG_MFD_SYSCON)	+= syscon.o
 obj-$(CONFIG_MFD_LM3533)	+= lm3533-core.o lm3533-ctrlbank.o
 obj-$(CONFIG_MFD_VEXPRESS_SYSREG)	+= vexpress-sysreg.o
diff --git a/drivers/mfd/max77705.c b/drivers/mfd/max77705.c
new file mode 100644
index 000000000000..8556ae9698e2
--- /dev/null
+++ b/drivers/mfd/max77705.c
@@ -0,0 +1,222 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Maxim MAX77705 PMIC core driver
+ *
+ * Copyright (C) 2024 Dzmitry Sankouski <dsankouski@gmail.com>
+ */
+
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/mfd/core.h>
+#include <linux/mfd/max77705-private.h>
+#include <linux/mfd/max77693-common.h>
+#include <linux/module.h>
+#include <linux/regmap.h>
+#include <linux/of.h>
+
+static struct mfd_cell max77705_devs[] = {
+	{
+		.name = "max77705-rgb",
+		.of_compatible = "maxim,max77705-rgb",
+	},
+	{
+		.name = "max77705-fuel-gauge",
+		.of_compatible = "maxim,max77705-fuel-gauge",
+	},
+	{
+		.name = "max77705-charger",
+		.of_compatible = "maxim,max77705-charger",
+	},
+	{
+		.name = "max77705-haptic",
+		.of_compatible = "maxim,max77705-haptic",
+	},
+};
+
+static const struct regmap_range max77705_readable_ranges[] = {
+	regmap_reg_range(MAX77705_PMIC_REG_PMICID1,		MAX77705_PMIC_REG_BSTOUT_MASK),
+	regmap_reg_range(MAX77705_PMIC_REG_INTSRC,		MAX77705_PMIC_REG_RESERVED_29),
+	regmap_reg_range(MAX77705_PMIC_REG_BOOSTCONTROL1,	MAX77705_PMIC_REG_BOOSTCONTROL1),
+	regmap_reg_range(MAX77705_PMIC_REG_MCONFIG,		MAX77705_PMIC_REG_MCONFIG2),
+	regmap_reg_range(MAX77705_PMIC_REG_FORCE_EN_MASK,	MAX77705_PMIC_REG_FORCE_EN_MASK),
+	regmap_reg_range(MAX77705_PMIC_REG_BOOSTCONTROL1,	MAX77705_PMIC_REG_BOOSTCONTROL1),
+	regmap_reg_range(MAX77705_PMIC_REG_BOOSTCONTROL2,	MAX77705_PMIC_REG_BOOSTCONTROL2),
+	regmap_reg_range(MAX77705_PMIC_REG_SW_RESET,		MAX77705_PMIC_REG_USBC_RESET),
+};
+
+static const struct regmap_range max77705_writable_ranges[] = {
+	regmap_reg_range(MAX77705_PMIC_REG_MAINCTRL1,		MAX77705_PMIC_REG_BSTOUT_MASK),
+	regmap_reg_range(MAX77705_PMIC_REG_INTSRC,		MAX77705_PMIC_REG_RESERVED_29),
+	regmap_reg_range(MAX77705_PMIC_REG_BOOSTCONTROL1,	MAX77705_PMIC_REG_BOOSTCONTROL1),
+	regmap_reg_range(MAX77705_PMIC_REG_MCONFIG,		MAX77705_PMIC_REG_MCONFIG2),
+	regmap_reg_range(MAX77705_PMIC_REG_FORCE_EN_MASK,	MAX77705_PMIC_REG_FORCE_EN_MASK),
+	regmap_reg_range(MAX77705_PMIC_REG_BOOSTCONTROL1,	MAX77705_PMIC_REG_BOOSTCONTROL1),
+	regmap_reg_range(MAX77705_PMIC_REG_BOOSTCONTROL2,	MAX77705_PMIC_REG_BOOSTCONTROL2),
+	regmap_reg_range(MAX77705_PMIC_REG_SW_RESET,		MAX77705_PMIC_REG_USBC_RESET),
+
+};
+
+static const struct regmap_access_table max77705_readable_table = {
+	.yes_ranges = max77705_readable_ranges,
+	.n_yes_ranges = ARRAY_SIZE(max77705_readable_ranges),
+};
+
+static const struct regmap_access_table max77705_writable_table = {
+	.yes_ranges = max77705_writable_ranges,
+	.n_yes_ranges = ARRAY_SIZE(max77705_writable_ranges),
+};
+
+static const struct regmap_config max77705_regmap_config = {
+	.reg_bits = 8,
+	.val_bits = 8,
+	.rd_table = &max77705_readable_table,
+	.wr_table = &max77705_writable_table,
+	.max_register = MAX77705_PMIC_REG_USBC_RESET,
+};
+
+static const struct regmap_config max77705_leds_regmap_config = {
+	.reg_base = MAX77705_RGBLED_REG_BASE,
+	.reg_bits = 8,
+	.val_bits = 8,
+	.max_register = MAX77705_LED_REG_END,
+};
+
+static const struct regmap_irq max77705_topsys_irqs[] = {
+	{ .mask = MAX77705_SYSTEM_IRQ_BSTEN_INT,  },
+	{ .mask = MAX77705_SYSTEM_IRQ_SYSUVLO_INT,  },
+	{ .mask = MAX77705_SYSTEM_IRQ_SYSOVLO_INT,  },
+	{ .mask = MAX77705_SYSTEM_IRQ_TSHDN_INT,  },
+	{ .mask = MAX77705_SYSTEM_IRQ_TM_INT,  },
+};
+
+static const struct regmap_irq_chip max77705_topsys_irq_chip = {
+	.name			= "max77705-topsys",
+	.status_base		= MAX77705_PMIC_REG_SYSTEM_INT,
+	.mask_base		= MAX77705_PMIC_REG_SYSTEM_INT_MASK,
+	.num_regs		= 1,
+	.irqs			= max77705_topsys_irqs,
+	.num_irqs		= ARRAY_SIZE(max77705_topsys_irqs),
+};
+
+static int max77705_i2c_probe(struct i2c_client *i2c)
+{
+	struct max77693_dev *max77705;
+	struct regmap_irq_chip_data *irq_data;
+	struct irq_domain *domain;
+	int ret;
+	unsigned int pmic_rev_value;
+	u8 pmic_rev;
+
+
+	max77705 = devm_kzalloc(&i2c->dev, sizeof(*max77705), GFP_KERNEL);
+	if (!max77705)
+		return -ENOMEM;
+
+	max77705->i2c = i2c;
+	max77705->dev = &i2c->dev;
+	max77705->irq = i2c->irq;
+	max77705->type = TYPE_MAX77705;
+	i2c_set_clientdata(i2c, max77705);
+
+	max77705->regmap = devm_regmap_init_i2c(i2c, &max77705_regmap_config);
+
+	if (IS_ERR(max77705->regmap))
+		return PTR_ERR(max77705->regmap);
+
+	if (regmap_read(max77705->regmap, MAX77705_PMIC_REG_PMICREV, &pmic_rev_value) < 0)
+		return -ENODEV;
+
+	if (pmic_rev != MAX77705_PASS3) {
+		dev_err(max77705->dev, "rev.0x%x is not tested",
+			pmic_rev);
+		return -ENODEV;
+	}
+
+	max77705->regmap_leds = devm_regmap_init_i2c(i2c, &max77705_leds_regmap_config);
+
+	if (IS_ERR(max77705->regmap_leds))
+		return PTR_ERR(max77705->regmap_leds);
+
+	ret = devm_regmap_add_irq_chip(max77705->dev, max77705->regmap,
+					max77705->irq,
+					IRQF_ONESHOT | IRQF_SHARED, 0,
+					&max77705_topsys_irq_chip,
+					&irq_data);
+
+	if (ret)
+		dev_err(max77705->dev, "failed to add irq chip: %d\n", ret);
+
+	/* Unmask interrupts from all blocks in interrupt source register */
+	ret = regmap_update_bits(max77705->regmap,
+				 MAX77705_PMIC_REG_INTSRC_MASK,
+				 MAX77705_SRC_IRQ_ALL, (unsigned int)~MAX77705_SRC_IRQ_ALL);
+
+	if (ret < 0) {
+		dev_err(max77705->dev,
+			"Could not unmask interrupts in INTSRC: %d\n", ret);
+		return ret;
+	}
+
+	domain = regmap_irq_get_domain(irq_data);
+
+	ret = devm_mfd_add_devices(max77705->dev, PLATFORM_DEVID_NONE,
+				   max77705_devs, ARRAY_SIZE(max77705_devs),
+				   NULL, 0, domain);
+
+	if (ret) {
+		dev_err(max77705->dev, "Failed to register child devices: %d\n", ret);
+		return ret;
+	}
+
+	device_init_wakeup(max77705->dev, true);
+
+	return 0;
+}
+
+static int max77705_suspend(struct device *dev)
+{
+	struct i2c_client *i2c = to_i2c_client(dev);
+	struct max77693_dev *max77705 = i2c_get_clientdata(i2c);
+
+	disable_irq(max77705->irq);
+
+	if (device_may_wakeup(dev))
+		enable_irq_wake(max77705->irq);
+
+	return 0;
+}
+
+static int max77705_resume(struct device *dev)
+{
+	struct i2c_client *i2c = to_i2c_client(dev);
+	struct max77693_dev *max77705 = i2c_get_clientdata(i2c);
+
+	if (device_may_wakeup(dev))
+		disable_irq_wake(max77705->irq);
+
+	enable_irq(max77705->irq);
+
+	return 0;
+}
+DEFINE_SIMPLE_DEV_PM_OPS(max77705_pm_ops, max77705_suspend, max77705_resume);
+
+static const struct of_device_id max77705_i2c_of_match[] = {
+	{ .compatible = "maxim,max77705" },
+	{ },
+};
+MODULE_DEVICE_TABLE(of, max77705_i2c_of_match);
+
+static struct i2c_driver max77705_i2c_driver = {
+	.driver = {
+		.name			= "max77705",
+		.of_match_table		= max77705_i2c_of_match,
+		.pm			= pm_sleep_ptr(&max77705_pm_ops),
+		.suppress_bind_attrs	= true,
+	},
+	.probe = max77705_i2c_probe,
+};
+module_i2c_driver(max77705_i2c_driver);
+
+MODULE_DESCRIPTION("Maxim MAX77705 PMIC core driver");
+MODULE_AUTHOR("Dzmitry Sankouski <dsankouski@gmail.com>");
+MODULE_LICENSE("GPL");
diff --git a/include/linux/mfd/max77693-common.h b/include/linux/mfd/max77693-common.h
index a5bce099f1ed..8665097892cd 100644
--- a/include/linux/mfd/max77693-common.h
+++ b/include/linux/mfd/max77693-common.h
@@ -1,6 +1,6 @@
 /* SPDX-License-Identifier: GPL-2.0+ */
 /*
- * Common data shared between Maxim 77693 and 77843 drivers
+ * Common data shared between Maxim 77693, 77705 and 77843 drivers
  *
  * Copyright (C) 2015 Samsung Electronics
  */
@@ -11,6 +11,7 @@
 enum max77693_types {
 	TYPE_MAX77693_UNKNOWN,
 	TYPE_MAX77693,
+	TYPE_MAX77705,
 	TYPE_MAX77843,
 
 	TYPE_MAX77693_NUM,
@@ -25,6 +26,7 @@ struct max77693_dev {
 	struct i2c_client *i2c_muic;	/* 0x4A , MUIC */
 	struct i2c_client *i2c_haptic;	/* MAX77693: 0x90 , Haptic */
 	struct i2c_client *i2c_chg;	/* MAX77843: 0xD2, Charger */
+	struct i2c_client *i2c_fg;	/* MAX77843: 0xD2, Charger */
 
 	enum max77693_types type;
 
@@ -32,6 +34,7 @@ struct max77693_dev {
 	struct regmap *regmap_muic;
 	struct regmap *regmap_haptic;	/* Only MAX77693 */
 	struct regmap *regmap_chg;	/* Only MAX77843 */
+	struct regmap *regmap_leds;	/* Only MAX77705 */
 
 	struct regmap_irq_chip_data *irq_data_led;
 	struct regmap_irq_chip_data *irq_data_topsys;
diff --git a/include/linux/mfd/max77705-private.h b/include/linux/mfd/max77705-private.h
new file mode 100644
index 000000000000..be781a0f9802
--- /dev/null
+++ b/include/linux/mfd/max77705-private.h
@@ -0,0 +1,181 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Maxim MAX77705 definitions.
+ *
+ * Copyright (C) 2015 Samsung Electronics, Inc.
+ * Copyright (C) 2024 Dzmitry Sankouski <dsankouski@gmail.com>
+ */
+
+#ifndef __LINUX_MFD_MAX77705_PRIV_H
+#define __LINUX_MFD_MAX77705_PRIV_H
+
+#include <linux/pm.h>
+
+#define MAX77705_SRC_IRQ_CHG	BIT(0)
+#define MAX77705_SRC_IRQ_TOP	BIT(1)
+#define MAX77705_SRC_IRQ_FG	BIT(2)
+#define MAX77705_SRC_IRQ_USBC	BIT(3)
+#define MAX77705_SRC_IRQ_ALL	(MAX77705_SRC_IRQ_CHG | MAX77705_SRC_IRQ_TOP | \
+				MAX77705_SRC_IRQ_FG | MAX77705_SRC_IRQ_USBC)
+
+/* MAX77705_PMIC_REG_PMICREV register */
+#define MAX77705_VERSION_SHIFT	3
+#define MAX77705_REVISION_MASK	GENMASK(2, 0)
+#define MAX77705_VERSION_MASK	GENMASK(7, MAX77705_VERSION_SHIFT)
+/* MAX77705_PMIC_REG_MAINCTRL1 register */
+#define MAX77705_MAINCTRL1_BIASEN_SHIFT	7
+#define MAX77705_MAINCTRL1_BIASEN_MASK	BIT(MAX77705_MAINCTRL1_BIASEN_SHIFT)
+/* MAX77705_PMIC_REG_MCONFIG2 (haptics) register */
+#define MAX77705_CONFIG2_MEN_SHIFT	6
+#define MAX77705_CONFIG2_MODE_SHIFT	7
+#define MAX77705_CONFIG2_HTYP_SHIFT	5
+/* MAX77705_PMIC_REG_SYSTEM_INT_MASK register */
+#define MAX77705_SYSTEM_IRQ_BSTEN_INT	BIT(3)
+#define MAX77705_SYSTEM_IRQ_SYSUVLO_INT	BIT(4)
+#define MAX77705_SYSTEM_IRQ_SYSOVLO_INT	BIT(5)
+#define MAX77705_SYSTEM_IRQ_TSHDN_INT	BIT(6)
+#define MAX77705_SYSTEM_IRQ_TM_INT	BIT(7)
+
+enum max77705_hw_rev {
+	MAX77705_PASS1 = 1,
+	MAX77705_PASS2,
+	MAX77705_PASS3,
+};
+
+enum max77705_reg {
+	MAX77705_PMIC_REG_PMICID1		= 0x00,
+	MAX77705_PMIC_REG_PMICREV		= 0x01,
+	MAX77705_PMIC_REG_MAINCTRL1		= 0x02,
+	MAX77705_PMIC_REG_BSTOUT_MASK		= 0x03,
+	MAX77705_PMIC_REG_FORCE_EN_MASK		= 0x08,
+	MAX77705_PMIC_REG_MCONFIG		= 0x10,
+	MAX77705_PMIC_REG_MCONFIG2		= 0x11,
+	MAX77705_PMIC_REG_INTSRC		= 0x22,
+	MAX77705_PMIC_REG_INTSRC_MASK		= 0x23,
+	MAX77705_PMIC_REG_SYSTEM_INT		= 0x24,
+	MAX77705_PMIC_REG_RESERVED_25		= 0x25,
+	MAX77705_PMIC_REG_SYSTEM_INT_MASK	= 0x26,
+	MAX77705_PMIC_REG_RESERVED_27		= 0x27,
+	MAX77705_PMIC_REG_RESERVED_28		= 0x28,
+	MAX77705_PMIC_REG_RESERVED_29		= 0x29,
+	MAX77705_PMIC_REG_BOOSTCONTROL1		= 0x4C,
+	MAX77705_PMIC_REG_BOOSTCONTROL2		= 0x4F,
+	MAX77705_PMIC_REG_SW_RESET		= 0x50,
+	MAX77705_PMIC_REG_USBC_RESET		= 0x51,
+
+	MAX77705_PMIC_REG_END,
+};
+
+enum max77705_chg_reg {
+	MAX77705_CHG_REG_BASE			= 0xB0,
+	MAX77705_CHG_REG_INT			= 0,
+	MAX77705_CHG_REG_INT_MASK,
+	MAX77705_CHG_REG_INT_OK,
+	MAX77705_CHG_REG_DETAILS_00,
+	MAX77705_CHG_REG_DETAILS_01,
+	MAX77705_CHG_REG_DETAILS_02,
+	MAX77705_CHG_REG_DTLS_03,
+	MAX77705_CHG_REG_CNFG_00,
+	MAX77705_CHG_REG_CNFG_01,
+	MAX77705_CHG_REG_CNFG_02,
+	MAX77705_CHG_REG_CNFG_03,
+	MAX77705_CHG_REG_CNFG_04,
+	MAX77705_CHG_REG_CNFG_05,
+	MAX77705_CHG_REG_CNFG_06,
+	MAX77705_CHG_REG_CNFG_07,
+	MAX77705_CHG_REG_CNFG_08,
+	MAX77705_CHG_REG_CNFG_09,
+	MAX77705_CHG_REG_CNFG_10,
+	MAX77705_CHG_REG_CNFG_11,
+	MAX77705_CHG_REG_CNFG_12,
+	MAX77705_CHG_REG_CNFG_13,
+	MAX77705_CHG_REG_CNFG_14,
+	MAX77705_CHG_REG_SAFEOUT_CTRL,
+};
+
+enum max77705_fuelgauge_reg {
+	STATUS_REG				= 0x00,
+	VALRT_THRESHOLD_REG			= 0x01,
+	TALRT_THRESHOLD_REG			= 0x02,
+	SALRT_THRESHOLD_REG			= 0x03,
+	REMCAP_REP_REG				= 0x05,
+	SOCREP_REG				= 0x06,
+	TEMPERATURE_REG				= 0x08,
+	VCELL_REG				= 0x09,
+	TIME_TO_EMPTY_REG			= 0x11,
+	FULLSOCTHR_REG				= 0x13,
+	CURRENT_REG				= 0x0A,
+	AVG_CURRENT_REG				= 0x0B,
+	SOCMIX_REG				= 0x0D,
+	SOCAV_REG				= 0x0E,
+	REMCAP_MIX_REG				= 0x0F,
+	FULLCAP_REG				= 0x10,
+	RFAST_REG				= 0x15,
+	AVR_TEMPERATURE_REG			= 0x16,
+	CYCLES_REG				= 0x17,
+	DESIGNCAP_REG				= 0x18,
+	AVR_VCELL_REG				= 0x19,
+	TIME_TO_FULL_REG			= 0x20,
+	CONFIG_REG				= 0x1D,
+	ICHGTERM_REG				= 0x1E,
+	REMCAP_AV_REG				= 0x1F,
+	FULLCAP_NOM_REG				= 0x23,
+	LEARN_CFG_REG				= 0x28,
+	FILTER_CFG_REG				= 0x29,
+	MISCCFG_REG				= 0x2B,
+	QRTABLE20_REG				= 0x32,
+	FULLCAP_REP_REG				= 0x35,
+	RCOMP_REG				= 0x38,
+	VEMPTY_REG				= 0x3A,
+	FSTAT_REG				= 0x3D,
+	DISCHARGE_THRESHOLD_REG			= 0x40,
+	QRTABLE30_REG				= 0x42,
+	ISYS_REG				= 0x43,
+	DQACC_REG				= 0x45,
+	DPACC_REG				= 0x46,
+	AVGISYS_REG				= 0x4B,
+	QH_REG					= 0x4D,
+	VSYS_REG				= 0xB1,
+	TALRTTH2_REG				= 0xB2,
+	VBYP_REG				= 0xB3,
+	CONFIG2_REG				= 0xBB,
+	IIN_REG					= 0xD0,
+	OCV_REG					= 0xEE,
+	VFOCV_REG				= 0xFB,
+	VFSOC_REG				= 0xFF,
+
+	MAX77705_FG_END,
+};
+
+enum max77705_led_reg {
+	MAX77705_RGBLED_REG_BASE		= 0x30,
+	MAX77705_RGBLED_REG_LEDEN		= 0,
+	MAX77705_RGBLED_REG_LED0BRT,
+	MAX77705_RGBLED_REG_LED1BRT,
+	MAX77705_RGBLED_REG_LED2BRT,
+	MAX77705_RGBLED_REG_LED3BRT,
+	MAX77705_RGBLED_REG_LEDRMP,
+	MAX77705_RGBLED_REG_LEDBLNK,
+	MAX77705_LED_REG_END
+};
+
+enum max77705_charger_battery_state {
+	MAX77705_BATTERY_NOBAT,
+	MAX77705_BATTERY_PREQUALIFICATION,
+	MAX77705_BATTERY_DEAD,
+	MAX77705_BATTERY_GOOD,
+	MAX77705_BATTERY_LOWVOLTAGE,
+	MAX77705_BATTERY_OVERVOLTAGE,
+	MAX77705_BATTERY_RESERVED,
+};
+
+enum max77705_charger_charge_type {
+	MAX77705_CHARGER_CONSTANT_CURRENT	= 1,
+	MAX77705_CHARGER_CONSTANT_VOLTAGE,
+	MAX77705_CHARGER_END_OF_CHARGE,
+	MAX77705_CHARGER_DONE,
+};
+
+extern const struct dev_pm_ops max77705_pm_ops;
+
+#endif /* __LINUX_MFD_MAX77705_PRIV_H */

-- 
2.39.2

[PATCH v8 4/7] input: max77693: add max77705 haptic support

[Dzmitry Sankouski]

Add support for haptic controller on MAX77705 Multifunction
device.

This driver supports external pwm and LRA (Linear Resonant Actuator) motor.
User can control the haptic device via force feedback framework.

Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Dzmitry Sankouski <dsankouski@gmail.com>
---
Changes in v4:
- add max77705 haptic support to max77693 driver
- delete max77705-haptic
---
 drivers/input/misc/Kconfig           |  4 ++--
 drivers/input/misc/Makefile          |  1 +
 drivers/input/misc/max77693-haptic.c | 15 ++++++++++++++-
 3 files changed, 17 insertions(+), 3 deletions(-)

diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig
index 6a852c76331b..b4515c4e5cf6 100644
--- a/drivers/input/misc/Kconfig
+++ b/drivers/input/misc/Kconfig
@@ -241,11 +241,11 @@ config INPUT_MAX77650_ONKEY
 
 config INPUT_MAX77693_HAPTIC
 	tristate "MAXIM MAX77693/MAX77843 haptic controller support"
-	depends on (MFD_MAX77693 || MFD_MAX77843) && PWM
+	depends on (MFD_MAX77693 || MFD_MAX77705 || MFD_MAX77843) && PWM
 	select INPUT_FF_MEMLESS
 	help
 	  This option enables support for the haptic controller on
-	  MAXIM MAX77693 and MAX77843 chips.
+	  MAXIM MAX77693, MAX77705 and MAX77843 chips.
 
 	  To compile this driver as module, choose M here: the
 	  module will be called max77693-haptic.
diff --git a/drivers/input/misc/Makefile b/drivers/input/misc/Makefile
index 4f7f736831ba..3e3532b27990 100644
--- a/drivers/input/misc/Makefile
+++ b/drivers/input/misc/Makefile
@@ -53,6 +53,7 @@ obj-$(CONFIG_INPUT_KXTJ9)		+= kxtj9.o
 obj-$(CONFIG_INPUT_M68K_BEEP)		+= m68kspkr.o
 obj-$(CONFIG_INPUT_MAX77650_ONKEY)	+= max77650-onkey.o
 obj-$(CONFIG_INPUT_MAX77693_HAPTIC)	+= max77693-haptic.o
+obj-$(CONFIG_INPUT_MAX77705_HAPTIC)	+= max77705-haptic.o
 obj-$(CONFIG_INPUT_MAX8925_ONKEY)	+= max8925_onkey.o
 obj-$(CONFIG_INPUT_MAX8997_HAPTIC)	+= max8997_haptic.o
 obj-$(CONFIG_INPUT_MC13783_PWRBUTTON)	+= mc13783-pwrbutton.o
diff --git a/drivers/input/misc/max77693-haptic.c b/drivers/input/misc/max77693-haptic.c
index 0e646f1b257b..c3b9d33608d7 100644
--- a/drivers/input/misc/max77693-haptic.c
+++ b/drivers/input/misc/max77693-haptic.c
@@ -23,6 +23,7 @@
 #include <linux/mfd/max77693.h>
 #include <linux/mfd/max77693-common.h>
 #include <linux/mfd/max77693-private.h>
+#include <linux/mfd/max77705-private.h>
 #include <linux/mfd/max77843-private.h>
 
 #define MAX_MAGNITUDE_SHIFT	16
@@ -115,6 +116,13 @@ static int max77693_haptic_configure(struct max77693_haptic *haptic,
 			MAX77693_HAPTIC_PWM_DIVISOR_128);
 		config_reg = MAX77693_HAPTIC_REG_CONFIG2;
 		break;
+	case TYPE_MAX77705:
+		value = ((haptic->type << MAX77693_CONFIG2_MODE) |
+			(enable << MAX77693_CONFIG2_MEN) |
+			(haptic->mode << MAX77693_CONFIG2_HTYP) |
+			MAX77693_HAPTIC_PWM_DIVISOR_128);
+		config_reg = MAX77705_PMIC_REG_MCONFIG;
+		break;
 	case TYPE_MAX77843:
 		value = (haptic->type << MCONFIG_MODE_SHIFT) |
 			(enable << MCONFIG_MEN_SHIFT) |
@@ -312,6 +320,9 @@ static int max77693_haptic_probe(struct platform_device *pdev)
 	case TYPE_MAX77693:
 		haptic->regmap_haptic = max77693->regmap_haptic;
 		break;
+	case TYPE_MAX77705:
+		haptic->regmap_haptic = max77693->regmap;
+		break;
 	case TYPE_MAX77843:
 		haptic->regmap_haptic = max77693->regmap;
 		break;
@@ -407,6 +418,7 @@ static DEFINE_SIMPLE_DEV_PM_OPS(max77693_haptic_pm_ops,
 
 static const struct platform_device_id max77693_haptic_id[] = {
 	{ "max77693-haptic", },
+	{ "max77705-haptic", },
 	{ "max77843-haptic", },
 	{},
 };
@@ -414,6 +426,7 @@ MODULE_DEVICE_TABLE(platform, max77693_haptic_id);
 
 static const struct of_device_id of_max77693_haptic_dt_match[] = {
 	{ .compatible = "maxim,max77693-haptic", },
+	{ .compatible = "maxim,max77705-haptic", },
 	{ .compatible = "maxim,max77843-haptic", },
 	{ /* sentinel */ },
 };
@@ -432,5 +445,5 @@ module_platform_driver(max77693_haptic_driver);
 
 MODULE_AUTHOR("Jaewon Kim <jaewon02.kim@samsung.com>");
 MODULE_AUTHOR("Krzysztof Kozlowski <krzk@kernel.org>");
-MODULE_DESCRIPTION("MAXIM 77693/77843 Haptic driver");
+MODULE_DESCRIPTION("MAXIM 77693/77705/77843 Haptic driver");
 MODULE_LICENSE("GPL");

-- 
2.39.2

[PATCH v8 5/7] power: supply: max77705: Add charger driver for Maxim 77705

[Dzmitry Sankouski]

Add driver for Maxim 77705 switch-mode charger (part of max77705
MFD driver) providing power supply class information to userspace.

The driver is configured through DTS (battery and system related
settings).

Signed-off-by: Dzmitry Sankouski <dsankouski@gmail.com>

---
Changes for v8:
- join lines, where fits 100 chars
- change comment style C++ -> C
- remove author from 'based on' file header statement
Changes for v6:
- add i2c init in driver
- replace remove_new back on remove
- handle IS_ERR(i2c_chg)
Changes for v5:
- remove const modifier from max77705_charger_irq_chip
  because it's modified with irq_drv_data in probe function
- fix license to GPL 2.0 only, where old vendor code used
  GPL 2.0 only
- move power header to power include dir
- use same hardware name in Kconfig and module descriptions

Changes for v4:
- start from scratch
- change word delimiters in filenames to '_'
- use GENMASK in header
- remove debugfs code
- migrate to regmap_add_irq_chip
- fix property getters to follow the same style
---
 drivers/power/supply/Kconfig            |   6 ++
 drivers/power/supply/Makefile           |   1 +
 drivers/power/supply/max77705_charger.c | 598 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 include/linux/power/max77705_charger.h  | 216 +++++++++++++++++++++++++++++++++++++++++++++++++++
 4 files changed, 821 insertions(+)

diff --git a/drivers/power/supply/Kconfig b/drivers/power/supply/Kconfig
index 9f2eef6787f7..66264036b65d 100644
--- a/drivers/power/supply/Kconfig
+++ b/drivers/power/supply/Kconfig
@@ -583,6 +583,12 @@ config CHARGER_MAX77693
 	help
 	  Say Y to enable support for the Maxim MAX77693 battery charger.
 
+config CHARGER_MAX77705
+	tristate "Maxim MAX77705 battery charger driver"
+	depends on MFD_MAX77705
+	help
+	  Say Y to enable support for the Maxim MAX77705 battery charger.
+
 config CHARGER_MAX77976
 	tristate "Maxim MAX77976 battery charger driver"
 	depends on I2C
diff --git a/drivers/power/supply/Makefile b/drivers/power/supply/Makefile
index 59c4a9f40d28..85d65b7aee1c 100644
--- a/drivers/power/supply/Makefile
+++ b/drivers/power/supply/Makefile
@@ -80,6 +80,7 @@ obj-$(CONFIG_CHARGER_MAX14577)	+= max14577_charger.o
 obj-$(CONFIG_CHARGER_DETECTOR_MAX14656)	+= max14656_charger_detector.o
 obj-$(CONFIG_CHARGER_MAX77650)	+= max77650-charger.o
 obj-$(CONFIG_CHARGER_MAX77693)	+= max77693_charger.o
+obj-$(CONFIG_CHARGER_MAX77705)	+= max77705_charger.o
 obj-$(CONFIG_CHARGER_MAX77976)	+= max77976_charger.o
 obj-$(CONFIG_CHARGER_MAX8997)	+= max8997_charger.o
 obj-$(CONFIG_CHARGER_MAX8998)	+= max8998_charger.o
diff --git a/drivers/power/supply/max77705_charger.c b/drivers/power/supply/max77705_charger.c
new file mode 100644
index 000000000000..060b1b9042be
--- /dev/null
+++ b/drivers/power/supply/max77705_charger.c
@@ -0,0 +1,598 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Based on max77650-charger.c
+ *
+ * Copyright (C) 2024 Dzmitry Sankouski <dsankouski@gmail.org>
+ *
+ * Battery charger driver for MAXIM 77705 charger/power-supply.
+ */
+
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/mfd/max77693-common.h>
+#include <linux/mfd/max77705-private.h>
+#include <linux/power/max77705_charger.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/power_supply.h>
+#include <linux/regmap.h>
+
+#define I2C_ADDR_CHG    0x69
+
+static const char *max77705_charger_model		= "max77705";
+static const char *max77705_charger_manufacturer	= "Maxim Integrated";
+
+static const struct regmap_config max77705_chg_regmap_config = {
+	.reg_base = MAX77705_CHG_REG_BASE,
+	.reg_bits = 8,
+	.val_bits = 8,
+	.max_register = MAX77705_CHG_REG_SAFEOUT_CTRL,
+};
+
+static enum power_supply_property max77705_charger_props[] = {
+	POWER_SUPPLY_PROP_ONLINE,
+	POWER_SUPPLY_PROP_PRESENT,
+	POWER_SUPPLY_PROP_STATUS,
+	POWER_SUPPLY_PROP_CHARGE_TYPE,
+	POWER_SUPPLY_PROP_HEALTH,
+	POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN,
+	POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE,
+	POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT,
+	POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT,
+};
+
+static int max77705_chgin_irq(void *irq_drv_data)
+{
+	struct max77705_charger_data *charger = irq_drv_data;
+
+	queue_work(charger->wqueue, &charger->chgin_work);
+
+	return 0;
+}
+
+static const struct regmap_irq max77705_charger_irqs[] = {
+	{ .mask = MAX77705_BYP_IM,   },
+	{ .mask = MAX77705_INP_LIMIT_IM,   },
+	{ .mask = MAX77705_BATP_IM,   },
+	{ .mask = MAX77705_BAT_IM,   },
+	{ .mask = MAX77705_CHG_IM,   },
+	{ .mask = MAX77705_WCIN_IM,   },
+	{ .mask = MAX77705_CHGIN_IM,   },
+	{ .mask = MAX77705_AICL_IM,   },
+};
+
+static struct regmap_irq_chip max77705_charger_irq_chip = {
+	.name			= "max77705-charger",
+	.status_base		= MAX77705_CHG_REG_INT,
+	.mask_base		= MAX77705_CHG_REG_INT_MASK,
+	.handle_post_irq	= max77705_chgin_irq,
+	.num_regs		= 1,
+	.irqs			= max77705_charger_irqs,
+	.num_irqs		= ARRAY_SIZE(max77705_charger_irqs),
+};
+
+static int max77705_charger_enable(struct max77705_charger_data *chg)
+{
+	int rv;
+
+	rv = regmap_update_bits(chg->regmap, MAX77705_CHG_REG_CNFG_09,
+				MAX77705_CHG_EN_MASK, MAX77705_CHG_EN_MASK);
+	if (rv)
+		dev_err(chg->dev, "unable to enable the charger: %d\n", rv);
+
+	return rv;
+}
+
+static void max77705_charger_disable(struct max77705_charger_data *chg)
+{
+	int rv;
+
+	rv = regmap_update_bits(chg->regmap,
+				MAX77705_CHG_REG_CNFG_09,
+				MAX77705_CHG_EN_MASK,
+				MAX77705_CHG_DISABLE);
+	if (rv)
+		dev_err(chg->dev, "unable to disable the charger: %d\n", rv);
+}
+
+static int max77705_get_online(struct regmap *regmap, int *val)
+{
+	unsigned int data;
+	int ret;
+
+	ret = regmap_read(regmap, MAX77705_CHG_REG_INT_OK, &data);
+	if (ret < 0)
+		return ret;
+
+	*val = !!(data & MAX77705_CHGIN_OK);
+
+	return 0;
+}
+
+static int max77705_check_battery(struct max77705_charger_data *charger, int *val)
+{
+	unsigned int reg_data;
+	unsigned int reg_data2;
+	struct regmap *regmap = charger->regmap;
+
+
+	regmap_read(regmap, MAX77705_CHG_REG_INT_OK, &reg_data);
+
+	dev_dbg(charger->dev, "CHG_INT_OK(0x%x)\n", reg_data);
+
+	regmap_read(regmap,
+			  MAX77705_CHG_REG_DETAILS_00, &reg_data2);
+
+	dev_dbg(charger->dev, "CHG_DETAILS00(0x%x)\n", reg_data2);
+
+	if ((reg_data & MAX77705_BATP_OK) || !(reg_data2 & MAX77705_BATP_DTLS))
+		*val = true;
+	else
+		*val = false;
+
+	return 0;
+}
+
+static int max77705_get_charge_type(struct max77705_charger_data *charger, int *val)
+{
+	struct regmap *regmap = charger->regmap;
+	unsigned int reg_data;
+
+	regmap_read(regmap, MAX77705_CHG_REG_CNFG_09, &reg_data);
+	if (!MAX77705_CHARGER_CHG_CHARGING(reg_data)) {
+		*val = POWER_SUPPLY_CHARGE_TYPE_NONE;
+		return 0;
+	}
+
+	regmap_read(regmap, MAX77705_CHG_REG_DETAILS_01, &reg_data);
+	reg_data &= MAX77705_CHG_DTLS;
+
+	switch (reg_data) {
+	case 0x0:
+	case MAX77705_CHARGER_CONSTANT_CURRENT:
+	case MAX77705_CHARGER_CONSTANT_VOLTAGE:
+		*val = POWER_SUPPLY_CHARGE_TYPE_FAST;
+		return 0;
+	default:
+		*val = POWER_SUPPLY_CHARGE_TYPE_NONE;
+		return 0;
+	}
+
+	return 0;
+}
+
+static int max77705_get_status(struct max77705_charger_data *charger, int *val)
+{
+	struct regmap *regmap = charger->regmap;
+	unsigned int reg_data;
+
+	regmap_read(regmap, MAX77705_CHG_REG_CNFG_09, &reg_data);
+	if (!MAX77705_CHARGER_CHG_CHARGING(reg_data)) {
+		*val = POWER_SUPPLY_CHARGE_TYPE_NONE;
+		return 0;
+	}
+
+	regmap_read(regmap, MAX77705_CHG_REG_DETAILS_01, &reg_data);
+	reg_data &= MAX77705_CHG_DTLS;
+
+	switch (reg_data) {
+	case 0x0:
+	case MAX77705_CHARGER_CONSTANT_CURRENT:
+	case MAX77705_CHARGER_CONSTANT_VOLTAGE:
+		*val = POWER_SUPPLY_STATUS_CHARGING;
+		return 0;
+	case MAX77705_CHARGER_END_OF_CHARGE:
+	case MAX77705_CHARGER_DONE:
+		*val = POWER_SUPPLY_STATUS_FULL;
+		return 0;
+	/* those values hard coded as in vendor kernel, because of */
+	/* failure to determine it's actual meaning. */
+	case 0x05:
+	case 0x06:
+	case 0x07:
+		*val = POWER_SUPPLY_STATUS_NOT_CHARGING;
+		return 0;
+	case 0x08:
+	case 0xA:
+	case 0xB:
+		*val = POWER_SUPPLY_STATUS_DISCHARGING;
+		return 0;
+	default:
+		*val = POWER_SUPPLY_STATUS_UNKNOWN;
+		return 0;
+	}
+
+	return 0;
+}
+
+static int max77705_get_vbus_state(struct regmap *regmap, int *value)
+{
+	int ret;
+	unsigned int charge_dtls;
+
+	ret = regmap_read(regmap, MAX77705_CHG_REG_DETAILS_00, &charge_dtls);
+	if (ret)
+		return ret;
+
+	charge_dtls = ((charge_dtls & MAX77705_CHGIN_DTLS) >>
+			MAX77705_CHGIN_DTLS_SHIFT);
+
+	switch (charge_dtls) {
+	case 0x00:
+		*value = POWER_SUPPLY_HEALTH_UNDERVOLTAGE;
+		break;
+	case 0x01:
+		*value = POWER_SUPPLY_HEALTH_UNDERVOLTAGE;
+		break;
+	case 0x02:
+		*value = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
+		break;
+	case 0x03:
+		*value = POWER_SUPPLY_HEALTH_GOOD;
+		break;
+	default:
+		return 0;
+	}
+	return 0;
+}
+
+static int max77705_get_battery_health(struct max77705_charger_data *charger,
+					int *value)
+{
+	struct regmap *regmap = charger->regmap;
+	unsigned int bat_dtls;
+
+	regmap_read(regmap, MAX77705_CHG_REG_DETAILS_01, &bat_dtls);
+	bat_dtls = ((bat_dtls & MAX77705_BAT_DTLS) >> MAX77705_BAT_DTLS_SHIFT);
+
+	switch (bat_dtls) {
+	case MAX77705_BATTERY_NOBAT:
+		dev_dbg(charger->dev, "%s: No battery and the charger is suspended\n",
+			__func__);
+		*value = POWER_SUPPLY_HEALTH_NO_BATTERY;
+		break;
+	case MAX77705_BATTERY_PREQUALIFICATION:
+		dev_dbg(charger->dev, "%s: battery is okay but its voltage is low(~VPQLB)\n",
+			__func__);
+		break;
+	case MAX77705_BATTERY_DEAD:
+		dev_dbg(charger->dev, "%s: battery dead\n", __func__);
+		*value = POWER_SUPPLY_HEALTH_DEAD;
+		break;
+	case MAX77705_BATTERY_GOOD:
+	case MAX77705_BATTERY_LOWVOLTAGE:
+		*value = POWER_SUPPLY_HEALTH_GOOD;
+		break;
+	case MAX77705_BATTERY_OVERVOLTAGE:
+		dev_dbg(charger->dev, "%s: battery ovp\n", __func__);
+		*value = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
+		break;
+	default:
+		dev_dbg(charger->dev, "%s: battery unknown\n", __func__);
+		*value = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
+		break;
+	}
+
+	return 0;
+}
+
+static int max77705_get_health(struct max77705_charger_data *charger, int *val)
+{
+	struct regmap *regmap = charger->regmap;
+	int ret, is_online = 0;
+
+	ret = max77705_get_online(regmap, &is_online);
+	if (ret)
+		return ret;
+	if (is_online) {
+		ret = max77705_get_vbus_state(regmap, val);
+		if (ret || (*val != POWER_SUPPLY_HEALTH_GOOD))
+			return ret;
+	}
+	return max77705_get_battery_health(charger, val);
+}
+
+static int max77705_get_input_current(struct max77705_charger_data *charger,
+					int *val)
+{
+	unsigned int reg_data;
+	int get_current = 0;
+	struct regmap *regmap = charger->regmap;
+
+	regmap_read(regmap,
+			  MAX77705_CHG_REG_CNFG_09, &reg_data);
+
+	reg_data &= MAX77705_CHG_CHGIN_LIM_MASK;
+
+	if (reg_data <= 3)
+		get_current = 100;
+	else if (reg_data >= MAX77705_CHG_CHGIN_LIM_MASK)
+		get_current = MAX77705_CURRENT_CHGIN_MAX;
+	else
+		get_current = (reg_data + 1) * 25;
+
+	*val = get_current;
+
+	return 0;
+}
+
+static int max77705_get_charge_current(struct max77705_charger_data *charger,
+					int *val)
+{
+	unsigned int reg_data;
+	struct regmap *regmap = charger->regmap;
+
+
+	regmap_read(regmap, MAX77705_CHG_REG_CNFG_02, &reg_data);
+	reg_data &= MAX77705_CHG_CC;
+
+	*val = reg_data <= 0x2 ? 100 : reg_data * 50;
+
+	return 0;
+}
+
+static int max77705_set_float_voltage(struct max77705_charger_data *charger,
+					int float_voltage)
+{
+	int float_voltage_mv;
+	unsigned int reg_data = 0;
+	struct regmap *regmap = charger->regmap;
+
+	float_voltage_mv = float_voltage / 1000;
+	reg_data = float_voltage_mv <= 4000 ? 0x0 :
+		float_voltage_mv >= 4500 ? 0x23 :
+		(float_voltage_mv <= 4200) ? (float_voltage_mv - 4000) / 50 :
+		(((float_voltage_mv - 4200) / 10) + 0x04);
+
+	return regmap_update_bits(regmap, MAX77705_CHG_REG_CNFG_04,
+				MAX77705_CHG_CV_PRM_MASK,
+				(reg_data << MAX77705_CHG_CV_PRM_SHIFT));
+}
+
+static int max77705_get_float_voltage(struct max77705_charger_data *charger,
+					int *val)
+{
+	unsigned int reg_data = 0;
+	struct regmap *regmap = charger->regmap;
+
+	regmap_read(regmap, MAX77705_CHG_REG_CNFG_04, &reg_data);
+	reg_data &= MAX77705_CHG_PRM_MASK;
+	*val = reg_data <= 0x04 ? reg_data * 50 + 4000 :
+					(reg_data - 4) * 10 + 4200;
+
+	return 0;
+}
+
+static int max77705_chg_get_property(struct power_supply *psy,
+					enum power_supply_property psp,
+					union power_supply_propval *val)
+{
+	struct max77705_charger_data *charger = power_supply_get_drvdata(psy);
+	struct regmap *regmap = charger->regmap;
+
+	switch (psp) {
+	case POWER_SUPPLY_PROP_ONLINE:
+		return max77705_get_online(regmap, &val->intval);
+	case POWER_SUPPLY_PROP_PRESENT:
+		return max77705_check_battery(charger, &val->intval);
+	case POWER_SUPPLY_PROP_STATUS:
+		return max77705_get_status(charger, &val->intval);
+	case POWER_SUPPLY_PROP_CHARGE_TYPE:
+		return max77705_get_charge_type(charger, &val->intval);
+	case POWER_SUPPLY_PROP_HEALTH:
+		return max77705_get_health(charger, &val->intval);
+	case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
+		return max77705_get_input_current(charger, &val->intval);
+	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
+		return max77705_get_charge_current(charger, &val->intval);
+	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_VOLTAGE:
+		return max77705_get_float_voltage(charger, &val->intval);
+	case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
+		val->intval = charger->bat_info->voltage_max_design_uv;
+		break;
+	case POWER_SUPPLY_PROP_MODEL_NAME:
+		val->strval = max77705_charger_model;
+		break;
+	case POWER_SUPPLY_PROP_MANUFACTURER:
+		val->strval = max77705_charger_manufacturer;
+		break;
+	default:
+		return -EINVAL;
+	}
+	return 0;
+}
+
+static const struct power_supply_desc max77705_charger_psy_desc = {
+	.name = "max77705-charger",
+	.type		= POWER_SUPPLY_TYPE_USB,
+	.properties = max77705_charger_props,
+	.num_properties = ARRAY_SIZE(max77705_charger_props),
+	.get_property = max77705_chg_get_property,
+};
+
+static void max77705_chgin_isr_work(struct work_struct *work)
+{
+	struct max77705_charger_data *charger =
+		container_of(work, struct max77705_charger_data, chgin_work);
+	power_supply_changed(charger->psy_chg);
+}
+
+static void max77705_charger_initialize(struct max77705_charger_data *chg)
+{
+	u8 reg_data;
+	struct power_supply_battery_info *info;
+	struct regmap *regmap = chg->regmap;
+
+	if (power_supply_get_battery_info(chg->psy_chg, &info) < 0)
+		return;
+
+	chg->bat_info = info;
+
+	/* unlock charger setting protect */
+	/* slowest LX slope */
+	reg_data = MAX77705_CHGPROT_MASK | MAX77705_SLOWEST_LX_SLOPE;
+	regmap_update_bits(regmap, MAX77705_CHG_REG_CNFG_06, reg_data,
+						reg_data);
+
+	/* fast charge timer disable */
+	/* restart threshold disable */
+	/* pre-qual charge disable */
+	reg_data = (MAX77705_FCHGTIME_DISABLE << MAX77705_FCHGTIME_SHIFT) |
+			(MAX77705_CHG_RSTRT_DISABLE << MAX77705_CHG_RSTRT_SHIFT) |
+			(MAX77705_CHG_PQEN_DISABLE << MAX77705_PQEN_SHIFT);
+	regmap_update_bits(regmap, MAX77705_CHG_REG_CNFG_01,
+						(MAX77705_FCHGTIME_MASK |
+						MAX77705_CHG_RSTRT_MASK |
+						MAX77705_PQEN_MASK),
+						reg_data);
+
+	/* OTG off(UNO on), boost off */
+	regmap_update_bits(regmap, MAX77705_CHG_REG_CNFG_00,
+				MAX77705_OTG_CTRL, 0);
+
+	/* charge current 450mA(default) */
+	/* otg current limit 900mA */
+	regmap_update_bits(regmap, MAX77705_CHG_REG_CNFG_02,
+				MAX77705_OTG_ILIM_MASK,
+				MAX77705_OTG_ILIM_900 << MAX77705_OTG_ILIM_SHIFT);
+
+	/* BAT to SYS OCP 4.80A */
+	regmap_update_bits(regmap, MAX77705_CHG_REG_CNFG_05,
+				MAX77705_REG_B2SOVRC_MASK,
+				MAX77705_B2SOVRC_4_8A << MAX77705_REG_B2SOVRC_SHIFT);
+	/* top off current 150mA */
+	/* top off timer 30min */
+	reg_data = (MAX77705_TO_ITH_150MA << MAX77705_TO_ITH_SHIFT) |
+			(MAX77705_TO_TIME_30M << MAX77705_TO_TIME_SHIFT) |
+			(MAX77705_SYS_TRACK_DISABLE << MAX77705_SYS_TRACK_DIS_SHIFT);
+	regmap_update_bits(regmap, MAX77705_CHG_REG_CNFG_03,
+			   (MAX77705_TO_ITH_MASK |
+			   MAX77705_TO_TIME_MASK |
+			   MAX77705_SYS_TRACK_DIS_MASK), reg_data);
+
+	/* cv voltage 4.2V or 4.35V */
+	/* MINVSYS 3.6V(default) */
+	if (info->voltage_max_design_uv < 0) {
+		dev_warn(chg->dev, "missing battery:voltage-max-design-microvolt\n");
+		max77705_set_float_voltage(chg, 4200000);
+	} else {
+		max77705_set_float_voltage(chg, info->voltage_max_design_uv);
+	}
+
+	regmap_update_bits(regmap, MAX77705_CHG_REG_CNFG_12,
+				MAX77705_VCHGIN_REG_MASK, MAX77705_VCHGIN_4_5);
+	regmap_update_bits(regmap, MAX77705_CHG_REG_CNFG_12,
+				MAX77705_WCIN_REG_MASK, MAX77705_WCIN_4_5);
+
+	/* Watchdog timer */
+	regmap_update_bits(regmap, MAX77705_CHG_REG_CNFG_00,
+				MAX77705_WDTEN_MASK, 0);
+
+	/* Active Discharge Enable */
+	regmap_update_bits(regmap, MAX77705_PMIC_REG_MAINCTRL1, 1, 1);
+
+	/* VBYPSET=5.0V */
+	regmap_update_bits(regmap, MAX77705_CHG_REG_CNFG_11, MAX77705_VBYPSET_MASK, 0);
+
+	/* Switching Frequency : 1.5MHz */
+	regmap_update_bits(regmap, MAX77705_CHG_REG_CNFG_08, MAX77705_REG_FSW_MASK,
+				(MAX77705_CHG_FSW_1_5MHz << MAX77705_REG_FSW_SHIFT));
+
+	/* Auto skip mode */
+	regmap_update_bits(regmap, MAX77705_CHG_REG_CNFG_12, MAX77705_REG_DISKIP_MASK,
+				(MAX77705_AUTO_SKIP << MAX77705_REG_DISKIP_SHIFT));
+}
+
+static int max77705_charger_probe(struct platform_device *pdev)
+{
+	struct power_supply_config pscfg = {};
+	struct i2c_client *i2c_chg;
+	struct max77693_dev *max77705;
+	struct max77705_charger_data *chg;
+	struct device *dev, *parent;
+	struct regmap_irq_chip_data *irq_data;
+	int ret;
+
+	dev = &pdev->dev;
+	parent = dev->parent;
+	max77705 = dev_get_drvdata(parent);
+
+	chg = devm_kzalloc(dev, sizeof(*chg), GFP_KERNEL);
+	if (!chg)
+		return -ENOMEM;
+
+	platform_set_drvdata(pdev, chg);
+
+	i2c_chg = devm_i2c_new_dummy_device(max77705->dev, max77705->i2c->adapter, I2C_ADDR_CHG);
+
+	if (IS_ERR(i2c_chg))
+		return PTR_ERR(i2c_chg);
+
+	chg->regmap = devm_regmap_init_i2c(i2c_chg, &max77705_chg_regmap_config);
+
+	if (IS_ERR(chg->regmap))
+		return PTR_ERR(chg->regmap);
+
+	chg->dev = dev;
+	max77705_charger_irq_chip.irq_drv_data = chg;
+	ret = devm_regmap_add_irq_chip(chg->dev, chg->regmap, max77705->irq,
+					IRQF_ONESHOT | IRQF_SHARED, 0,
+					&max77705_charger_irq_chip,
+					&irq_data);
+	if (ret) {
+		dev_err(dev, "failed to add irq chip: %d\n", ret);
+		return ret;
+	}
+
+	ret = regmap_update_bits(chg->regmap,
+				MAX77705_CHG_REG_INT_MASK,
+				MAX77705_CHGIN_IM, 0);
+
+	if (ret)
+		return ret;
+
+	chg->wqueue = create_singlethread_workqueue(dev_name(dev));
+	if (IS_ERR(chg->wqueue)) {
+		dev_err(dev, "failed to create workqueue\n");
+		return PTR_ERR(chg->wqueue);
+	}
+	INIT_WORK(&chg->chgin_work, max77705_chgin_isr_work);
+
+	pscfg.of_node = dev->of_node;
+	pscfg.drv_data = chg;
+
+	chg->psy_chg = devm_power_supply_register(dev, &max77705_charger_psy_desc, &pscfg);
+	if (IS_ERR(chg->psy_chg))
+		return PTR_ERR(chg->psy_chg);
+
+	max77705_charger_initialize(chg);
+
+	return max77705_charger_enable(chg);
+}
+
+static void max77705_charger_remove(struct platform_device *pdev)
+{
+	struct max77705_charger_data *chg = platform_get_drvdata(pdev);
+
+	max77705_charger_disable(chg);
+}
+
+static const struct of_device_id max77705_charger_of_match[] = {
+	{ .compatible = "maxim,max77705-charger" },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, max77705_charger_of_match);
+
+static struct platform_driver max77705_charger_driver = {
+	.driver = {
+		.name = "max77705-charger",
+		.of_match_table = max77705_charger_of_match,
+	},
+	.probe = max77705_charger_probe,
+	.remove = max77705_charger_remove,
+};
+module_platform_driver(max77705_charger_driver);
+
+MODULE_AUTHOR("Dzmitry Sankouski <dsankouski@gmail.com>");
+MODULE_DESCRIPTION("Maxim MAX77705 charger driver");
+MODULE_LICENSE("GPL");
diff --git a/include/linux/power/max77705_charger.h b/include/linux/power/max77705_charger.h
new file mode 100644
index 000000000000..44ecd6b32cbe
--- /dev/null
+++ b/include/linux/power/max77705_charger.h
@@ -0,0 +1,216 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Maxim MAX77705 definitions.
+ *
+ * Copyright (C) 2015 Samsung Electronics, Inc.
+ * Copyright (C) 2024 Dzmitry Sankouski <dsankouski@gmail.com>
+ */
+
+#ifndef __MAX77705_CHARGER_H
+#define __MAX77705_CHARGER_H __FILE__
+
+/* MAX77705_CHG_REG_CHG_INT */
+#define MAX77705_BYP_I		BIT(0)
+#define MAX77705_INP_LIMIT_I	BIT(1)
+#define MAX77705_BATP_I		BIT(2)
+#define MAX77705_BAT_I		BIT(3)
+#define MAX77705_CHG_I		BIT(4)
+#define MAX77705_WCIN_I		BIT(5)
+#define MAX77705_CHGIN_I	BIT(6)
+#define MAX77705_AICL_I		BIT(7)
+
+/* MAX77705_CHG_REG_CHG_INT_MASK */
+#define MAX77705_BYP_IM		BIT(0)
+#define MAX77705_INP_LIMIT_IM	BIT(1)
+#define MAX77705_BATP_IM	BIT(2)
+#define MAX77705_BAT_IM		BIT(3)
+#define MAX77705_CHG_IM		BIT(4)
+#define MAX77705_WCIN_IM	BIT(5)
+#define MAX77705_CHGIN_IM	BIT(6)
+#define MAX77705_AICL_IM	BIT(7)
+
+/* MAX77705_CHG_REG_CHG_INT_OK */
+#define MAX77705_BYP_OK		BIT(0)
+#define MAX77705_DISQBAT_OK	BIT(1)
+#define MAX77705_BATP_OK	BIT(2)
+#define MAX77705_BAT_OK		BIT(3)
+#define MAX77705_CHG_OK		BIT(4)
+#define MAX77705_WCIN_OK	BIT(5)
+#define MAX77705_CHGIN_OK	BIT(6)
+#define MAX77705_AICL_OK	BIT(7)
+
+/* MAX77705_CHG_REG_DETAILS_00 */
+#define MAX77705_BATP_DTLS		BIT(0)
+#define MAX77705_WCIN_DTLS		GENMASK(4, 3)
+#define MAX77705_WCIN_DTLS_SHIFT	3
+#define MAX77705_CHGIN_DTLS		GENMASK(6, 5)
+#define MAX77705_CHGIN_DTLS_SHIFT	5
+
+/* MAX77705_CHG_REG_DETAILS_01 */
+#define MAX77705_CHG_DTLS	GENMASK(3, 0)
+#define MAX77705_CHG_DTLS_SHIFT	0
+#define MAX77705_BAT_DTLS	GENMASK(6, 4)
+#define MAX77705_BAT_DTLS_SHIFT	4
+
+/* MAX77705_CHG_REG_DETAILS_02 */
+#define MAX77705_BYP_DTLS	GENMASK(3, 0)
+#define MAX77705_BYP_DTLS_SHIFT	0
+
+/* MAX77705_CHG_REG_CNFG_00 */
+#define MAX77705_CHG_SHIFT	0
+#define MAX77705_UNO_SHIFT	1
+#define MAX77705_OTG_SHIFT	1
+#define MAX77705_BUCK_SHIFT	2
+#define MAX77705_BOOST_SHIFT	3
+#define MAX77705_WDTEN_SHIFT	4
+#define MAX77705_MODE_MASK	GENMASK(3, 0)
+#define MAX77705_CHG_MASK	BIT(MAX77705_CHG_SHIFT)
+#define MAX77705_UNO_MASK	BIT(MAX77705_UNO_SHIFT)
+#define MAX77705_OTG_MASK	BIT(MAX77705_OTG_SHIFT)
+#define MAX77705_BUCK_MASK	BIT(MAX77705_BUCK_SHIFT)
+#define MAX77705_BOOST_MASK	BIT(MAX77705_BOOST_SHIFT)
+#define MAX77705_WDTEN_MASK	BIT(MAX77705_WDTEN_SHIFT)
+#define MAX77705_UNO_CTRL	(MAX77705_UNO_MASK | MAX77705_BOOST_MASK)
+#define MAX77705_OTG_CTRL	(MAX77705_OTG_MASK | MAX77705_BOOST_MASK)
+
+/* MAX77705_CHG_REG_CNFG_01 */
+#define MAX77705_FCHGTIME_SHIFT		0
+#define MAX77705_FCHGTIME_MASK		GENMASK(2, 0)
+#define MAX77705_CHG_RSTRT_SHIFT	4
+#define MAX77705_CHG_RSTRT_MASK		GENMASK(5, 4)
+#define MAX77705_FCHGTIME_DISABLE	0
+#define MAX77705_CHG_RSTRT_DISABLE	0x3
+
+#define MAX77705_PQEN_SHIFT		7
+#define MAX77705_PQEN_MASK		BIT(7)
+#define MAX77705_CHG_PQEN_DISABLE	0
+#define MAX77705_CHG_PQEN_ENABLE	1
+
+/* MAX77705_CHG_REG_CNFG_02 */
+#define MAX77705_OTG_ILIM_SHIFT		6
+#define MAX77705_OTG_ILIM_MASK		GENMASK(7, 6)
+#define MAX77705_OTG_ILIM_500		0
+#define MAX77705_OTG_ILIM_900		1
+#define MAX77705_OTG_ILIM_1200		2
+#define MAX77705_OTG_ILIM_1500		3
+#define MAX77705_CHG_CC			GENMASK(5, 0)
+
+/* MAX77705_CHG_REG_CNFG_03 */
+#define MAX77705_TO_ITH_SHIFT		0
+#define MAX77705_TO_ITH_MASK		GENMASK(2, 0)
+#define MAX77705_TO_TIME_SHIFT		3
+#define MAX77705_TO_TIME_MASK		GENMASK(5, 3)
+#define MAX77705_SYS_TRACK_DIS_SHIFT	7
+#define MAX77705_SYS_TRACK_DIS_MASK	BIT(7)
+#define MAX77705_TO_ITH_150MA		0
+#define MAX77705_TO_TIME_30M		3
+#define MAX77705_SYS_TRACK_ENABLE	0
+#define MAX77705_SYS_TRACK_DISABLE	1
+
+/* MAX77705_CHG_REG_CNFG_04 */
+#define MAX77705_CHG_MINVSYS_SHIFT	6
+#define MAX77705_CHG_MINVSYS_MASK	GENMASK(7, 6)
+#define MAX77705_CHG_PRM_SHIFT		0
+#define MAX77705_CHG_PRM_MASK		GENMASK(5, 0)
+
+#define MAX77705_CHG_CV_PRM_SHIFT	0
+#define MAX77705_CHG_CV_PRM_MASK	GENMASK(5, 0)
+
+/* MAX77705_CHG_REG_CNFG_05 */
+#define MAX77705_REG_B2SOVRC_SHIFT	0
+#define MAX77705_REG_B2SOVRC_MASK	GENMASK(3, 0)
+#define MAX77705_B2SOVRC_DISABLE	0
+#define MAX77705_B2SOVRC_4_5A		6
+#define MAX77705_B2SOVRC_4_8A		8
+#define MAX77705_B2SOVRC_5_0A		9
+
+/* MAX77705_CHG_CNFG_06 */
+#define MAX77705_WDTCLR_SHIFT		0
+#define MAX77705_WDTCLR_MASK		GENMASK(1, 0)
+#define MAX77705_WDTCLR			1
+#define MAX77705_CHGPROT_MASK		GENMASK(3, 2)
+#define MAX77705_CHGPROT_UNLOCKED	GENMASK(3, 2)
+#define MAX77705_SLOWEST_LX_SLOPE	GENMASK(6, 5)
+
+/* MAX77705_CHG_REG_CNFG_07 */
+#define MAX77705_CHG_FMBST		4
+#define MAX77705_REG_FMBST_SHIFT	2
+#define MAX77705_REG_FMBST_MASK		BIT(MAX77705_REG_FMBST_SHIFT)
+#define MAX77705_REG_FGSRC_SHIFT	1
+#define MAX77705_REG_FGSRC_MASK		BIT(MAX77705_REG_FGSRC_SHIFT)
+
+/* MAX77705_CHG_REG_CNFG_08 */
+#define MAX77705_REG_FSW_SHIFT		0
+#define MAX77705_REG_FSW_MASK		GENMASK(1, 0)
+#define MAX77705_CHG_FSW_3MHz		0
+#define MAX77705_CHG_FSW_2MHz		1
+#define MAX77705_CHG_FSW_1_5MHz		2
+
+/* MAX77705_CHG_REG_CNFG_09 */
+#define MAX77705_CHG_CHGIN_LIM_MASK		GENMASK(6, 0)
+#define MAX77705_CHG_EN_MASK			BIT(7)
+#define MAX77705_CHG_DISABLE			0
+#define MAX77705_CHARGER_CHG_CHARGING(_reg) \
+				(((_reg) & MAX77705_CHG_EN_MASK) > 1)
+
+
+/* MAX77705_CHG_REG_CNFG_10 */
+#define MAX77705_CHG_WCIN_LIM		GENMASK(5, 0)
+
+/* MAX77705_CHG_REG_CNFG_11 */
+#define MAX77705_VBYPSET_SHIFT		0
+#define MAX77705_VBYPSET_MASK		GENMASK(6, 0)
+
+/* MAX77705_CHG_REG_CNFG_12 */
+#define MAX77705_CHGINSEL_SHIFT		5
+#define MAX77705_CHGINSEL_MASK		BIT(MAX77705_CHGINSEL_SHIFT)
+#define MAX77705_WCINSEL_SHIFT		6
+#define MAX77705_WCINSEL_MASK		BIT(MAX77705_WCINSEL_SHIFT)
+#define MAX77705_VCHGIN_REG_MASK	GENMASK(4, 3)
+#define MAX77705_WCIN_REG_MASK		GENMASK(2, 1)
+#define MAX77705_REG_DISKIP_SHIFT	0
+#define MAX77705_REG_DISKIP_MASK	BIT(MAX77705_REG_DISKIP_SHIFT)
+/* REG=4.5V, UVLO=4.7V */
+#define MAX77705_VCHGIN_4_5		0
+/* REG=4.5V, UVLO=4.7V */
+#define MAX77705_WCIN_4_5		0
+#define MAX77705_DISABLE_SKIP		1
+#define MAX77705_AUTO_SKIP		0
+
+/* mA */
+#define MAX77705_CURRENT_STEP		25
+#define MAX77705_CURRENT_WCIN_MAX	1600
+#define MAX77705_CURRENT_CHGIN_MAX	3200
+
+/* Convert current in mA to corresponding CNFG09 value */
+inline u8 max77705_convert_ma_to_chgin_ilim_value(unsigned int cur)
+{
+	if (cur < MAX77705_CURRENT_STEP)
+		return 0;
+	if (cur < MAX77705_CURRENT_CHGIN_MAX)
+		return (cur / MAX77705_CURRENT_STEP) - 1;
+	else
+		return (MAX77705_CURRENT_CHGIN_MAX / MAX77705_CURRENT_STEP) - 1;
+}
+
+/* Convert current in mA to corresponding CNFG10 value */
+inline u8 max77705_convert_ma_to_wcin_ilim_value(unsigned int cur)
+{
+	if (cur < MAX77705_CURRENT_STEP)
+		return 0;
+	if (cur < MAX77705_CURRENT_WCIN_MAX)
+		return (cur / MAX77705_CURRENT_STEP) - 1;
+	else
+		return (MAX77705_CURRENT_WCIN_MAX / MAX77705_CURRENT_STEP) - 1;
+}
+
+struct max77705_charger_data {
+	struct device			*dev;
+	struct regmap		*regmap;
+	struct power_supply_battery_info *bat_info;
+	struct workqueue_struct *wqueue;
+	struct work_struct	chgin_work;
+	struct power_supply	*psy_chg;
+};
+
+#endif /* __MAX77705_CHARGER_H */

-- 
2.39.2

[PATCH v8 6/7] power: supply: max77705: Add fuel gauge driver for Maxim 77705

[Dzmitry Sankouski]

Add driver for Maxim 77705 fuel gauge (part of max77705 PMIC)
providing power supply class information to userspace.

The driver is configured through DTS (battery and system related
settings).

Signed-off-by: Dzmitry Sankouski <dsankouski@gmail.com>

---
Changes for v8:
- join line where possible to fit in 100 chars
- change comment style C++ -> C
- fix kernel-doc comments

Changes for v6:
- add i2c init in driver
- initialize unintialized ret value with 0
- remove unused CAPACITY_SCALE_* constants
- max77705_*_convert: replace multiplication and divison with
  mult_frac helper to fix https://lore.kernel.org/oe-kbuild-all/202410111913.5ADtNHNM-lkp@intel.com/
- max77705_battery_settings: move out battery settings gathering and rename function
- probe: do regmap setup last, because if power_supply_get_battery_info
  fails, we're going to probe again and fail with i2c bus busy error
- remove MFD from commit message

Changes for v5:
- fix license
- use same hardware name in Kconfig and module descriptions
- fix email, and module author

Changes for v4:
- rework driver from scratch
- change word delimiters in filenames to "_"
- remove debugfs code
- cleanup header
---
 drivers/power/supply/Kconfig               |   7 +++
 drivers/power/supply/Makefile              |   1 +
 drivers/power/supply/max77705_fuel_gauge.c | 363 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 include/linux/power/max77705_fuelgauge.h   |  71 +++++++++++++++++++++++++++
 4 files changed, 442 insertions(+)

diff --git a/drivers/power/supply/Kconfig b/drivers/power/supply/Kconfig
index 66264036b65d..9a3b17036ddc 100644
--- a/drivers/power/supply/Kconfig
+++ b/drivers/power/supply/Kconfig
@@ -589,6 +589,13 @@ config CHARGER_MAX77705
 	help
 	  Say Y to enable support for the Maxim MAX77705 battery charger.
 
+config FUEL_GAUGE_MAX77705
+	tristate "Maxim MAX77705 fuel gauge driver"
+	depends on MFD_MAX77705
+	default n
+	help
+	  Say Y to enable support for MAXIM MAX77705 fuel gauge driver.
+
 config CHARGER_MAX77976
 	tristate "Maxim MAX77976 battery charger driver"
 	depends on I2C
diff --git a/drivers/power/supply/Makefile b/drivers/power/supply/Makefile
index 85d65b7aee1c..997049fc1795 100644
--- a/drivers/power/supply/Makefile
+++ b/drivers/power/supply/Makefile
@@ -81,6 +81,7 @@ obj-$(CONFIG_CHARGER_DETECTOR_MAX14656)	+= max14656_charger_detector.o
 obj-$(CONFIG_CHARGER_MAX77650)	+= max77650-charger.o
 obj-$(CONFIG_CHARGER_MAX77693)	+= max77693_charger.o
 obj-$(CONFIG_CHARGER_MAX77705)	+= max77705_charger.o
+obj-$(CONFIG_FUEL_GAUGE_MAX77705)	+= max77705_fuel_gauge.o
 obj-$(CONFIG_CHARGER_MAX77976)	+= max77976_charger.o
 obj-$(CONFIG_CHARGER_MAX8997)	+= max8997_charger.o
 obj-$(CONFIG_CHARGER_MAX8998)	+= max8998_charger.o
diff --git a/drivers/power/supply/max77705_fuel_gauge.c b/drivers/power/supply/max77705_fuel_gauge.c
new file mode 100644
index 000000000000..43feeb77b47a
--- /dev/null
+++ b/drivers/power/supply/max77705_fuel_gauge.c
@@ -0,0 +1,363 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2024 Dzmitry Sankouski <dsankouski@gmail>
+ *
+ * Fuel gauge driver for MAXIM 77705 charger/power-supply.
+ */
+
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/mfd/max77693-common.h>
+#include <linux/mfd/max77705-private.h>
+#include <linux/power/max77705_fuelgauge.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/power_supply.h>
+#include <linux/regmap.h>
+
+#define I2C_ADDR_FG     0x36
+
+static const char *max77705_fuelgauge_model		= "max77705";
+static const char *max77705_fuelgauge_manufacturer	= "Maxim Integrated";
+
+static const struct regmap_config max77705_fg_regmap_config = {
+	.reg_bits = 8,
+	.val_bits = 8,
+	.max_register = MAX77705_FG_END,
+};
+
+static enum power_supply_property max77705_fuelgauge_props[] = {
+	POWER_SUPPLY_PROP_STATUS,
+	POWER_SUPPLY_PROP_PRESENT,
+	POWER_SUPPLY_PROP_VOLTAGE_NOW,
+	POWER_SUPPLY_PROP_VOLTAGE_OCV,
+	POWER_SUPPLY_PROP_VOLTAGE_AVG,
+	POWER_SUPPLY_PROP_CURRENT_NOW,
+	POWER_SUPPLY_PROP_CURRENT_AVG,
+	POWER_SUPPLY_PROP_CHARGE_NOW,
+	POWER_SUPPLY_PROP_CHARGE_FULL,
+	POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
+	POWER_SUPPLY_PROP_CAPACITY,
+	POWER_SUPPLY_PROP_TEMP,
+	POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
+	POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
+};
+
+static int max77705_fg_read_reg(struct max77705_fuelgauge_data *fuelgauge,
+				unsigned int reg, unsigned int *val)
+{
+	struct regmap *regmap = fuelgauge->regmap;
+	u8 data[2];
+	int ret;
+
+	ret = regmap_noinc_read(regmap, reg, data, sizeof(data));
+	if (ret < 0)
+		return ret;
+
+	*val = (data[1] << 8) + data[0];
+
+	return 0;
+}
+
+static int max77705_fg_read_temp(struct max77705_fuelgauge_data *fuelgauge,
+				 int *val)
+{
+	struct regmap *regmap = fuelgauge->regmap;
+	u8 data[2] = { 0, 0 };
+	int ret, temperature = 0;
+
+	ret = regmap_noinc_read(regmap, TEMPERATURE_REG, data, sizeof(data));
+	if (ret < 0)
+		return ret;
+
+	if (data[1] & BIT(7))
+		temperature = ((~(data[1])) & 0xFF) + 1;
+	else
+		temperature = data[1] & 0x7f;
+
+	temperature *= 10;
+	temperature += data[0] * 10 / 256;
+	*val = temperature;
+
+	return 0;
+}
+
+static int max77705_fg_check_battery_present(struct max77705_fuelgauge_data
+					     *fuelgauge, int *val)
+{
+	struct regmap *regmap = fuelgauge->regmap;
+	u8 status_data[2];
+	int ret;
+
+	ret = regmap_noinc_read(regmap, STATUS_REG, status_data, sizeof(status_data));
+	if (ret < 0)
+		return ret;
+
+	*val = !(status_data[0] & MAX77705_BAT_ABSENT_MASK);
+
+	return 0;
+}
+
+static int max77705_battery_get_status(struct max77705_fuelgauge_data *fuelgauge,
+					int *val)
+{
+	int current_now;
+	int am_i_supplied;
+	int ret;
+	unsigned int soc_rep;
+
+	am_i_supplied = power_supply_am_i_supplied(fuelgauge->psy_fg);
+	if (am_i_supplied) {
+		if (am_i_supplied == -ENODEV) {
+			dev_err(fuelgauge->dev,
+				"power supply not found, fall back to current-based method\n");
+		} else {
+			*val = POWER_SUPPLY_STATUS_CHARGING;
+			return 0;
+		}
+	}
+	ret = max77705_fg_read_reg(fuelgauge, SOCREP_REG, &soc_rep);
+	if (ret)
+		return ret;
+
+	if (soc_rep < 100) {
+		ret = max77705_fg_read_reg(fuelgauge, CURRENT_REG, &current_now);
+		if (ret)
+			return ret;
+
+		if (current_now > 0)
+			*val = POWER_SUPPLY_STATUS_CHARGING;
+		else if (current_now < 0)
+			*val = POWER_SUPPLY_STATUS_DISCHARGING;
+		else
+			*val = POWER_SUPPLY_STATUS_NOT_CHARGING;
+	} else {
+		*val = POWER_SUPPLY_STATUS_FULL;
+	}
+
+	return 0;
+}
+
+static void max77705_unit_adjustment(struct max77705_fuelgauge_data *fuelgauge,
+					 enum power_supply_property psp,
+					 union power_supply_propval *val)
+{
+	const unsigned int base_unit_conversion = 1000;
+
+	switch (psp) {
+	case POWER_SUPPLY_PROP_VOLTAGE_NOW:
+	case POWER_SUPPLY_PROP_VOLTAGE_OCV:
+	case POWER_SUPPLY_PROP_VOLTAGE_AVG:
+		val->intval = max77705_fg_vs_convert(val->intval);
+		break;
+	case POWER_SUPPLY_PROP_CURRENT_NOW:
+	case POWER_SUPPLY_PROP_CURRENT_AVG:
+		val->intval = max77705_fg_cs_convert(val->intval,
+						     fuelgauge->rsense_conductance);
+		break;
+	case POWER_SUPPLY_PROP_CHARGE_NOW:
+	case POWER_SUPPLY_PROP_CHARGE_FULL:
+	case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
+		val->intval *= base_unit_conversion;
+		break;
+	case POWER_SUPPLY_PROP_CAPACITY:
+		val->intval = min(val->intval, 100);
+		break;
+	default:
+		dev_dbg(fuelgauge->dev,
+			"%s: no need for unit conversion %d\n", __func__, psp);
+	}
+}
+
+static int max77705_fg_get_property(struct power_supply *psy,
+				    enum power_supply_property psp,
+				    union power_supply_propval *val)
+{
+	struct max77705_fuelgauge_data *fuelgauge =
+	    power_supply_get_drvdata(psy);
+	int ret = 0;
+
+	switch (psp) {
+	case POWER_SUPPLY_PROP_STATUS:
+		ret = max77705_battery_get_status(fuelgauge, &val->intval);
+		break;
+	case POWER_SUPPLY_PROP_PRESENT:
+		ret = max77705_fg_check_battery_present(fuelgauge, &val->intval);
+		break;
+	case POWER_SUPPLY_PROP_VOLTAGE_NOW:
+		ret = max77705_fg_read_reg(fuelgauge, VCELL_REG, &val->intval);
+		break;
+	case POWER_SUPPLY_PROP_VOLTAGE_OCV:
+		ret = max77705_fg_read_reg(fuelgauge, VFOCV_REG, &val->intval);
+		break;
+	case POWER_SUPPLY_PROP_VOLTAGE_AVG:
+		ret = max77705_fg_read_reg(fuelgauge, AVR_VCELL_REG, &val->intval);
+		break;
+	case POWER_SUPPLY_PROP_CURRENT_NOW:
+		ret = max77705_fg_read_reg(fuelgauge, CURRENT_REG, &val->intval);
+		break;
+	case POWER_SUPPLY_PROP_CURRENT_AVG:
+		ret = max77705_fg_read_reg(fuelgauge, AVG_CURRENT_REG, &val->intval);
+		break;
+	case POWER_SUPPLY_PROP_CHARGE_NOW:
+		ret = max77705_fg_read_reg(fuelgauge, REMCAP_REP_REG, &val->intval);
+		break;
+	case POWER_SUPPLY_PROP_CHARGE_FULL:
+		ret = max77705_fg_read_reg(fuelgauge, FULLCAP_REP_REG, &val->intval);
+		break;
+	case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
+		ret = max77705_fg_read_reg(fuelgauge, DESIGNCAP_REG, &val->intval);
+		break;
+	case POWER_SUPPLY_PROP_CAPACITY:
+		ret = max77705_fg_read_reg(fuelgauge, SOCREP_REG, &val->intval);
+		break;
+	case POWER_SUPPLY_PROP_TEMP:
+		ret = max77705_fg_read_temp(fuelgauge, &val->intval);
+		break;
+	case POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW:
+		ret = max77705_fg_read_reg(fuelgauge, TIME_TO_EMPTY_REG, &val->intval);
+		break;
+	case POWER_SUPPLY_PROP_TIME_TO_FULL_NOW:
+		ret = max77705_fg_read_reg(fuelgauge, TIME_TO_FULL_REG, &val->intval);
+		break;
+	case POWER_SUPPLY_PROP_CYCLE_COUNT:
+		ret = max77705_fg_read_reg(fuelgauge, CYCLES_REG, &val->intval);
+		break;
+	case POWER_SUPPLY_PROP_MODEL_NAME:
+		val->strval = max77705_fuelgauge_model;
+		break;
+	case POWER_SUPPLY_PROP_MANUFACTURER:
+		val->strval = max77705_fuelgauge_manufacturer;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	if (ret)
+		return ret;
+
+	max77705_unit_adjustment(fuelgauge, psp, val);
+
+	return 0;
+}
+
+static const struct power_supply_desc max77705_fg_desc = {
+	.name = "max77705-fuel-gauge",
+	.type = POWER_SUPPLY_TYPE_BATTERY,
+	.properties = max77705_fuelgauge_props,
+	.num_properties = ARRAY_SIZE(max77705_fuelgauge_props),
+	.get_property = max77705_fg_get_property,
+};
+
+static int max77705_fg_set_charge_design(struct regmap *regmap, int value)
+{
+	u8 data[2];
+	int value_mah;
+
+	value_mah = value / 1000;
+	data[0] = value_mah & 0xFF;
+	data[1] = (value_mah >> 8) & 0xFF;
+
+	return regmap_noinc_write(regmap, DESIGNCAP_REG, data, sizeof(data));
+}
+
+static int max77705_write_bat_info(struct max77705_fuelgauge_data *fuelgauge)
+{
+	struct power_supply_battery_info *info = fuelgauge->bat_info;
+
+	if (info->energy_full_design_uwh != info->charge_full_design_uah) {
+		if (info->charge_full_design_uah == -EINVAL)
+			dev_warn(fuelgauge->dev, "missing battery:charge-full-design-microamp-hours\n");
+		return max77705_fg_set_charge_design(fuelgauge->regmap,
+						info->charge_full_design_uah);
+	}
+
+	return 0;
+}
+
+static int max77705_fuelgauge_parse_dt(struct max77705_fuelgauge_data
+				       *fuelgauge)
+{
+	struct device *dev = fuelgauge->dev;
+	struct device_node *np = dev->of_node;
+	int ret;
+	unsigned int rsense;
+
+	if (!np) {
+		dev_err(dev, "no fuelgauge OF node\n");
+		return -EINVAL;
+	}
+	ret = of_property_read_u32(np, "shunt-resistor-micro-ohms",
+				   &rsense);
+	if (ret < 0) {
+		dev_warn(dev, "No shunt-resistor-micro-ohms property, assume default\n");
+		fuelgauge->rsense_conductance = 100;
+	} else
+		fuelgauge->rsense_conductance = 1000000 / rsense; /* rsense conductance in Ohm^-1 */
+
+	return 0;
+}
+
+static int max77705_fuelgauge_probe(struct platform_device *pdev)
+{
+	struct i2c_client *i2c_fg;
+	struct max77693_dev *max77705 = dev_get_drvdata(pdev->dev.parent);
+	struct max77705_fuelgauge_data *fuelgauge;
+	struct power_supply_config fuelgauge_cfg = { };
+	struct device *dev = &pdev->dev;
+	int ret = 0;
+
+	fuelgauge = devm_kzalloc(dev, sizeof(*fuelgauge), GFP_KERNEL);
+	if (!fuelgauge)
+		return -ENOMEM;
+
+	fuelgauge->dev = dev;
+
+	ret = max77705_fuelgauge_parse_dt(fuelgauge);
+	if (ret < 0)
+		return ret;
+
+	fuelgauge_cfg.drv_data = fuelgauge;
+	fuelgauge_cfg.of_node = fuelgauge->dev->of_node;
+
+	fuelgauge->psy_fg = devm_power_supply_register(&pdev->dev,
+							&max77705_fg_desc,
+							&fuelgauge_cfg);
+
+	if (IS_ERR(fuelgauge->psy_fg))
+		return PTR_ERR(fuelgauge->psy_fg);
+
+	ret = power_supply_get_battery_info(fuelgauge->psy_fg,
+					&fuelgauge->bat_info);
+
+	if (ret)
+		return ret;
+
+	i2c_fg = devm_i2c_new_dummy_device(max77705->dev, max77705->i2c->adapter, I2C_ADDR_FG);
+
+	if (IS_ERR(i2c_fg))
+		return PTR_ERR(i2c_fg);
+
+	fuelgauge->regmap = devm_regmap_init_i2c(i2c_fg, &max77705_fg_regmap_config);
+
+	return max77705_write_bat_info(fuelgauge);
+}
+
+static const struct of_device_id max77705_fg_of_match[] = {
+	{ .compatible = "maxim,max77705-fuel-gauge" },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, max77705_fg_of_match);
+
+static struct platform_driver max77705_fuelgauge_driver = {
+	.driver = {
+		.name = "max77705-fuel-gauge",
+		.of_match_table = max77705_fg_of_match,
+	},
+	.probe = max77705_fuelgauge_probe,
+};
+module_platform_driver(max77705_fuelgauge_driver);
+
+MODULE_DESCRIPTION("Maxim MAX77705 Fuel Gauge Driver");
+MODULE_AUTHOR("Dzmitry Sankouski <dsankouski@gmail>");
+MODULE_LICENSE("GPL");
diff --git a/include/linux/power/max77705_fuelgauge.h b/include/linux/power/max77705_fuelgauge.h
new file mode 100644
index 000000000000..4c9f0f38f773
--- /dev/null
+++ b/include/linux/power/max77705_fuelgauge.h
@@ -0,0 +1,71 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2024 Dzmitry Sankouski <dsankouski@gmail.org>
+ *
+ * Fuel gauge driver header for MAXIM 77705 charger/power-supply.
+ */
+
+#ifndef __MAX77705_FUELGAUGE_H
+#define __MAX77705_FUELGAUGE_H __FILE__
+
+#include <linux/regmap.h>
+#include <linux/platform_device.h>
+#include <linux/power_supply.h>
+
+#define ALERT_EN			4
+/*
+ * Current and capacity values are displayed as a voltage
+ * and must be divided by the sense resistor to determine Amps or Amp-hours.
+ * This should be applied to all current, charge, energy registers,
+ * except ModelGauge m5 Algorithm related ones.
+ * current sense resolution
+ */
+#define MAX77705_FG_CS_ADC_RESOLUTION	15625 /* 1.5625 microvolts */
+/* voltage sense resolution */
+#define MAX77705_FG_VS_ADC_RESOLUTION	78125 /* 78.125 microvolts */
+/* CONFIG_REG register */
+#define MAX77705_SOC_ALERT_EN_MASK	BIT(2)
+/* When set to 1, external temperature measurements should be written from the host */
+#define MAX77705_TEX_MASK		BIT(8)
+/* Enable Thermistor */
+#define MAX77705_ETHRM_MASK		BIT(5)
+/* CONFIG2_REG register */
+#define MAX77705_AUTO_DISCHARGE_EN_MASK BIT(9)
+/* STATUS_REG register */
+#define MAX77705_BAT_ABSENT_MASK	BIT(3)
+
+/**
+ * max77705_fg_vs_convert() - Convert voltage register value to micro volts.
+ *
+ * @reg_val: Register value.
+ *
+ * Return: Voltage in micro Volts.
+ */
+inline u64 max77705_fg_vs_convert(u16 reg_val)
+{
+	return mult_frac(reg_val, MAX77705_FG_VS_ADC_RESOLUTION, 1000);
+}
+
+/**
+ * max77705_fg_cs_convert() - Convert current register value to micro volts.
+ *
+ * @reg_val: Register value.
+ * @rsense_conductance: Current sense resistor conductance in Ohm^-1.
+ *
+ * Return: Current in micro Volts.
+ */
+inline s32 max77705_fg_cs_convert(s16 reg_val, u32 rsense_conductance)
+{
+	return mult_frac(reg_val * rsense_conductance, MAX77705_FG_CS_ADC_RESOLUTION,
+			 10000);
+}
+
+struct max77705_fuelgauge_data {
+	struct device *dev;
+	struct regmap *regmap;
+	struct power_supply *psy_fg;
+	struct power_supply_battery_info *bat_info;
+	u32 rsense_conductance;
+};
+
+#endif /* __MAX77705_FUELGAUGE_H */

-- 
2.39.2

[PATCH v8 7/7] leds: max77705: Add LEDs support

[Dzmitry Sankouski]

This adds basic support for LEDs for the max77705 PMIC.

Signed-off-by: Dzmitry Sankouski <dsankouski@gmail.com>

---
Changes for v8:
- join line where possible to fit in 100 chars
- change comment style C++ -> C

Changes for v6:
- change compatible suffix to 'rgb'
- remove I2C dependency in Kconfig
- remove copyright and author from 'based on' header statement
- replace MFD abbreviation with PMIC
- MAINTAINERS: alphabetic order
- max77705_rgb_blink: replace ternary operators with if..else if sequence
- max77705_rgb_blink: move hardcoded numbers to constants
- max77705_led_brightness_set: move ret to the bottom
- s/map/regmap
- replace device_for_each_child_node with scoped version
- s/rv/ret
Changes for v5:
- use same hardware name in Kconfig and module descriptions
- remove copyrighter owner from module authors

Changes in v4:
- inline BLINK_(ON|OFF) macro
- remove camel case
- drop backwards compatibility(new driver)
- drop module alias
---
 MAINTAINERS                          |   1 +
 drivers/leds/Kconfig                 |   6 ++++++
 drivers/leds/Makefile                |   1 +
 drivers/leds/leds-max77705.c         | 167 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 include/linux/mfd/max77705-private.h |  18 ++++++++++++++++
 5 files changed, 193 insertions(+)

diff --git a/MAINTAINERS b/MAINTAINERS
index 126f2fef0a6d..2416d8faa2d5 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -14134,6 +14134,7 @@ F:	Documentation/devicetree/bindings/*/maxim,max77693.yaml
 F:	Documentation/devicetree/bindings/*/maxim,max77705*.yaml
 F:	Documentation/devicetree/bindings/*/maxim,max77843.yaml
 F:	Documentation/devicetree/bindings/clock/maxim,max77686.txt
+F:	drivers/leds/leds-max77705.c
 F:	drivers/*/*max77843.c
 F:	drivers/*/max14577*.c
 F:	drivers/*/max77686*.c
diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig
index b784bb74a837..27ce55b32543 100644
--- a/drivers/leds/Kconfig
+++ b/drivers/leds/Kconfig
@@ -753,6 +753,12 @@ config LEDS_MAX77650
 	help
 	  LEDs driver for MAX77650 family of PMICs from Maxim Integrated.
 
+config LEDS_MAX77705
+	tristate "LED support for Maxim MAX77705 PMIC"
+	depends on MFD_MAX77705 && LEDS_CLASS
+	help
+	  LED driver for MAX77705 PMIC from Maxim Integrated.
+
 config LEDS_MAX8997
 	tristate "LED support for MAX8997 PMIC"
 	depends on LEDS_CLASS && MFD_MAX8997
diff --git a/drivers/leds/Makefile b/drivers/leds/Makefile
index 18afbb5a23ee..096bf244527d 100644
--- a/drivers/leds/Makefile
+++ b/drivers/leds/Makefile
@@ -60,6 +60,7 @@ obj-$(CONFIG_LEDS_LP8860)		+= leds-lp8860.o
 obj-$(CONFIG_LEDS_LT3593)		+= leds-lt3593.o
 obj-$(CONFIG_LEDS_MAX5970)		+= leds-max5970.o
 obj-$(CONFIG_LEDS_MAX77650)		+= leds-max77650.o
+obj-$(CONFIG_LEDS_MAX77705)		+= leds-max77705.o
 obj-$(CONFIG_LEDS_MAX8997)		+= leds-max8997.o
 obj-$(CONFIG_LEDS_MC13783)		+= leds-mc13783.o
 obj-$(CONFIG_LEDS_MENF21BMC)		+= leds-menf21bmc.o
diff --git a/drivers/leds/leds-max77705.c b/drivers/leds/leds-max77705.c
new file mode 100644
index 000000000000..29db23702231
--- /dev/null
+++ b/drivers/leds/leds-max77705.c
@@ -0,0 +1,167 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Based on leds-max77650 driver
+ *
+ * LED driver for MAXIM 77705 PMIC.
+ * Copyright (C) 2024 Dzmitry Sankouski <dsankouski@gmail.org>
+ */
+
+#include <linux/i2c.h>
+#include <linux/leds.h>
+#include <linux/mfd/max77705-private.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+
+#define MAX77705_LED_NUM_LEDS		4
+#define MAX77705_LED_EN_MASK		GENMASK(1, 0)
+#define MAX77705_LED_MAX_BRIGHTNESS	0xff
+
+struct max77705_led {
+	struct led_classdev cdev;
+	struct regmap *regmap;
+	unsigned int en_shift;
+	unsigned int reg_brightness;
+};
+
+static struct max77705_led *max77705_to_led(struct led_classdev *cdev)
+{
+	return container_of(cdev, struct max77705_led, cdev);
+}
+
+static int max77705_rgb_blink(struct led_classdev *cdev,
+				unsigned long *delay_on,
+				unsigned long *delay_off)
+{
+	struct max77705_led *led = max77705_to_led(cdev);
+	int value, on_value, off_value;
+
+	if (*delay_on < MAX77705_RGB_DELAY_100_STEP)
+		on_value = 0;
+	else if (*delay_on < MAX77705_RGB_DELAY_100_STEP_LIM)
+		on_value = *delay_on / MAX77705_RGB_DELAY_100_STEP - 1;
+	else if (*delay_on < MAX77705_RGB_DELAY_250_STEP_LIM)
+		on_value = (*delay_on - MAX77705_RGB_DELAY_100_STEP_LIM) /
+				MAX77705_RGB_DELAY_250_STEP +
+				MAX77705_RGB_DELAY_100_STEP_COUNT;
+	else
+		on_value = 15;
+
+	on_value <<= 4;
+
+	if (*delay_off < 1)
+		off_value = 0;
+	else if (*delay_off < MAX77705_RGB_DELAY_500_STEP)
+		off_value = 1;
+	else if (*delay_off < MAX77705_RGB_DELAY_500_STEP_LIM)
+		off_value = *delay_off / MAX77705_RGB_DELAY_500_STEP;
+	else if (*delay_off < MAX77705_RGB_DELAY_1000_STEP_LIM)
+		off_value = (*delay_off - MAX77705_RGB_DELAY_1000_STEP_LIM) /
+				MAX77705_RGB_DELAY_1000_STEP +
+				MAX77705_RGB_DELAY_500_STEP_COUNT;
+	else if (*delay_off < MAX77705_RGB_DELAY_2000_STEP_LIM)
+		off_value = (*delay_off - MAX77705_RGB_DELAY_2000_STEP_LIM) /
+				MAX77705_RGB_DELAY_2000_STEP +
+				MAX77705_RGB_DELAY_1000_STEP_COUNT;
+	else
+		off_value = 15;
+
+	value = on_value | off_value;
+	return regmap_write(led->regmap, MAX77705_RGBLED_REG_LEDBLNK, value);
+}
+
+static int max77705_led_brightness_set(struct led_classdev *cdev,
+					enum led_brightness brightness)
+{
+	struct max77705_led *led = max77705_to_led(cdev);
+	unsigned long blink_default = 0;
+	int ret;
+
+	if (brightness == LED_OFF) {
+		/* Flash OFF */
+		ret = regmap_update_bits(led->regmap,
+					MAX77705_RGBLED_REG_LEDEN,
+					MAX77705_LED_EN_MASK << led->en_shift, 0);
+		max77705_rgb_blink(cdev, &blink_default, &blink_default);
+	} else {
+		/* Set current */
+		ret = regmap_write(led->regmap, led->reg_brightness, brightness);
+		if (ret < 0)
+			return ret;
+
+		ret = regmap_update_bits(led->regmap,
+					MAX77705_RGBLED_REG_LEDEN, LED_ON << led->en_shift,
+					MAX77705_LED_EN_MASK << led->en_shift);
+	}
+
+	return ret;
+}
+
+static int max77705_led_probe(struct platform_device *pdev)
+{
+	struct max77705_led *leds, *led;
+	struct device *dev = &pdev->dev;
+	struct regmap *regmap;
+	int ret, num_leds;
+	u32 reg;
+
+	leds = devm_kcalloc(dev, sizeof(*leds), MAX77705_LED_NUM_LEDS, GFP_KERNEL);
+	if (!leds)
+		return -ENOMEM;
+
+	regmap = dev_get_regmap(dev->parent, NULL);
+	if (!regmap)
+		return -ENODEV;
+
+	num_leds = device_get_child_node_count(dev);
+	if (num_leds < 0 || num_leds > MAX77705_LED_NUM_LEDS)
+		return -ENODEV;
+
+	device_for_each_child_node_scoped(dev, child) {
+		struct led_init_data init_data = {};
+
+		ret = fwnode_property_read_u32(child, "reg", &reg);
+		if (ret || reg >= MAX77705_LED_NUM_LEDS)
+			ret = -EINVAL;
+
+		led = &leds[reg];
+		led->regmap = regmap;
+		led->reg_brightness = MAX77705_RGBLED_REG_LED0BRT + reg;
+		led->en_shift = MAX77705_RGBLED_EN_WIDTH * reg;
+		led->cdev.brightness_set_blocking = max77705_led_brightness_set;
+		led->cdev.blink_set = max77705_rgb_blink;
+		led->cdev.max_brightness = MAX77705_LED_MAX_BRIGHTNESS;
+
+		init_data.fwnode = child;
+
+		ret = devm_led_classdev_register_ext(dev, &led->cdev,
+							&init_data);
+		if (ret)
+			return ret;
+
+		ret = max77705_led_brightness_set(&led->cdev, LED_OFF);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
+}
+
+static const struct of_device_id max77705_led_of_match[] = {
+	{ .compatible = "maxim,max77705-rgb" },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, max77705_led_of_match);
+
+static struct platform_driver max77705_led_driver = {
+	.driver = {
+		.name = "max77705-led",
+		.of_match_table = max77705_led_of_match,
+	},
+	.probe = max77705_led_probe,
+};
+module_platform_driver(max77705_led_driver);
+
+MODULE_DESCRIPTION("Maxim MAX77705 LED driver");
+MODULE_AUTHOR("Dzmitry Sankouski <dsankouski@gmail.com>");
+MODULE_LICENSE("GPL");
diff --git a/include/linux/mfd/max77705-private.h b/include/linux/mfd/max77705-private.h
index be781a0f9802..2140693ce747 100644
--- a/include/linux/mfd/max77705-private.h
+++ b/include/linux/mfd/max77705-private.h
@@ -35,6 +35,24 @@
 #define MAX77705_SYSTEM_IRQ_SYSOVLO_INT	BIT(5)
 #define MAX77705_SYSTEM_IRQ_TSHDN_INT	BIT(6)
 #define MAX77705_SYSTEM_IRQ_TM_INT	BIT(7)
+/* MAX77705_RGBLED_REG_LEDEN register */
+#define MAX77705_RGBLED_EN_WIDTH	2
+/* MAX77705_RGBLED_REG_LEDBLNK register */
+#define MAX77705_RGB_DELAY_100_STEP_LIM 500
+#define MAX77705_RGB_DELAY_100_STEP_COUNT 4
+#define MAX77705_RGB_DELAY_100_STEP 100
+#define MAX77705_RGB_DELAY_250_STEP_LIM 3250
+#define MAX77705_RGB_DELAY_250_STEP 250
+#define MAX77705_RGB_DELAY_500_STEP 500
+#define MAX77705_RGB_DELAY_500_STEP_COUNT 10
+#define MAX77705_RGB_DELAY_500_STEP_LIM 5000
+#define MAX77705_RGB_DELAY_1000_STEP_LIM 8000
+#define MAX77705_RGB_DELAY_1000_STEP_COUNT 13
+#define MAX77705_RGB_DELAY_1000_STEP 1000
+#define MAX77705_RGB_DELAY_2000_STEP 2000
+#define MAX77705_RGB_DELAY_2000_STEP_COUNT 13
+#define MAX77705_RGB_DELAY_2000_STEP_LIM 12000
+
 
 enum max77705_hw_rev {
 	MAX77705_PASS1 = 1,

-- 
2.39.2

Re: [PATCH v8 3/7] mfd: Add new driver for MAX77705 PMIC

[kernel test robot]

Hi Dzmitry,

kernel test robot noticed the following build warnings:

[auto build test WARNING on 86e3904dcdc7e70e3257fc1de294a1b75f3d8d04]

url:    https://github.com/intel-lab-lkp/linux/commits/Dzmitry-Sankouski/power-supply-add-undervoltage-health-status-property/20241031-053513
base:   86e3904dcdc7e70e3257fc1de294a1b75f3d8d04
patch link:    https://lore.kernel.org/r/20241031-starqltechn_integration_upstream-v8-3-2fa666c2330e%40gmail.com
patch subject: [PATCH v8 3/7] mfd: Add new driver for MAX77705 PMIC
config: x86_64-allyesconfig (https://download.01.org/0day-ci/archive/20241103/202411030141.DTmej8oX-lkp@intel.com/config)
compiler: clang version 19.1.3 (https://github.com/llvm/llvm-project ab51eccf88f5321e7c60591c5546b254b6afab99)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241103/202411030141.DTmej8oX-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202411030141.DTmej8oX-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from drivers/mfd/max77705.c:8:
   In file included from include/linux/i2c.h:19:
   In file included from include/linux/regulator/consumer.h:35:
   In file included from include/linux/suspend.h:5:
   In file included from include/linux/swap.h:9:
   In file included from include/linux/memcontrol.h:21:
   In file included from include/linux/mm.h:2223:
   include/linux/vmstat.h:504:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion]
     504 |         return vmstat_text[NR_VM_ZONE_STAT_ITEMS +
         |                            ~~~~~~~~~~~~~~~~~~~~~ ^
     505 |                            item];
         |                            ~~~~
   include/linux/vmstat.h:511:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion]
     511 |         return vmstat_text[NR_VM_ZONE_STAT_ITEMS +
         |                            ~~~~~~~~~~~~~~~~~~~~~ ^
     512 |                            NR_VM_NUMA_EVENT_ITEMS +
         |                            ~~~~~~~~~~~~~~~~~~~~~~
   include/linux/vmstat.h:518:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
     518 |         return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_"
         |                               ~~~~~~~~~~~ ^ ~~~
   include/linux/vmstat.h:524:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion]
     524 |         return vmstat_text[NR_VM_ZONE_STAT_ITEMS +
         |                            ~~~~~~~~~~~~~~~~~~~~~ ^
     525 |                            NR_VM_NUMA_EVENT_ITEMS +
         |                            ~~~~~~~~~~~~~~~~~~~~~~
>> drivers/mfd/max77705.c:129:6: warning: variable 'pmic_rev' is uninitialized when used here [-Wuninitialized]
     129 |         if (pmic_rev != MAX77705_PASS3) {
         |             ^~~~~~~~
   drivers/mfd/max77705.c:108:13: note: initialize the variable 'pmic_rev' to silence this warning
     108 |         u8 pmic_rev;
         |                    ^
         |                     = '\0'
   5 warnings generated.


vim +/pmic_rev +129 drivers/mfd/max77705.c

   100	
   101	static int max77705_i2c_probe(struct i2c_client *i2c)
   102	{
   103		struct max77693_dev *max77705;
   104		struct regmap_irq_chip_data *irq_data;
   105		struct irq_domain *domain;
   106		int ret;
   107		unsigned int pmic_rev_value;
   108		u8 pmic_rev;
   109	
   110	
   111		max77705 = devm_kzalloc(&i2c->dev, sizeof(*max77705), GFP_KERNEL);
   112		if (!max77705)
   113			return -ENOMEM;
   114	
   115		max77705->i2c = i2c;
   116		max77705->dev = &i2c->dev;
   117		max77705->irq = i2c->irq;
   118		max77705->type = TYPE_MAX77705;
   119		i2c_set_clientdata(i2c, max77705);
   120	
   121		max77705->regmap = devm_regmap_init_i2c(i2c, &max77705_regmap_config);
   122	
   123		if (IS_ERR(max77705->regmap))
   124			return PTR_ERR(max77705->regmap);
   125	
   126		if (regmap_read(max77705->regmap, MAX77705_PMIC_REG_PMICREV, &pmic_rev_value) < 0)
   127			return -ENODEV;
   128	
 > 129		if (pmic_rev != MAX77705_PASS3) {
   130			dev_err(max77705->dev, "rev.0x%x is not tested",
   131				pmic_rev);
   132			return -ENODEV;
   133		}
   134	
   135		max77705->regmap_leds = devm_regmap_init_i2c(i2c, &max77705_leds_regmap_config);
   136	
   137		if (IS_ERR(max77705->regmap_leds))
   138			return PTR_ERR(max77705->regmap_leds);
   139	
   140		ret = devm_regmap_add_irq_chip(max77705->dev, max77705->regmap,
   141						max77705->irq,
   142						IRQF_ONESHOT | IRQF_SHARED, 0,
   143						&max77705_topsys_irq_chip,
   144						&irq_data);
   145	
   146		if (ret)
   147			dev_err(max77705->dev, "failed to add irq chip: %d\n", ret);
   148	
   149		/* Unmask interrupts from all blocks in interrupt source register */
   150		ret = regmap_update_bits(max77705->regmap,
   151					 MAX77705_PMIC_REG_INTSRC_MASK,
   152					 MAX77705_SRC_IRQ_ALL, (unsigned int)~MAX77705_SRC_IRQ_ALL);
   153	
   154		if (ret < 0) {
   155			dev_err(max77705->dev,
   156				"Could not unmask interrupts in INTSRC: %d\n", ret);
   157			return ret;
   158		}
   159	
   160		domain = regmap_irq_get_domain(irq_data);
   161	
   162		ret = devm_mfd_add_devices(max77705->dev, PLATFORM_DEVID_NONE,
   163					   max77705_devs, ARRAY_SIZE(max77705_devs),
   164					   NULL, 0, domain);
   165	
   166		if (ret) {
   167			dev_err(max77705->dev, "Failed to register child devices: %d\n", ret);
   168			return ret;
   169		}
   170	
   171		device_init_wakeup(max77705->dev, true);
   172	
   173		return 0;
   174	}
   175	

-- 
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https://github.com/intel/lkp-tests/wiki