[PATCH v2 00/13] mfd: add support for max77650 PMIC

[PATCH v2 00/13] mfd: add support for max77650 PMIC

[Bartosz Golaszewski]

From: Bartosz Golaszewski <bgolaszewski@baylibre.com>

This series adds support for max77650 ultra low-power PMIC. It provides
the core mfd driver and a set of five sub-drivers for the regulator,
power supply, gpio, leds and input subsystems.

Patches 1-6 add the DT binding documents. Patches 7-12 add all drivers.
Last patch adds a MAINTAINERS entry for this device.

Note that patch 8/13 depends on commit 03c87b95ac04 ("regulator: provide
rdev_get_regmap()") which was picked up by Mark Brown for v5.1.

v1 -> v2:

General:
- use C++ style comments for the SPDX license identifier and the
  copyright header
- s/MODULE_LICENSE("GPL")/MODULE_LICENSE("GPL v2")/
- lookup the virtual interrupt numbers in the MFD driver, setup
  resources for child devices and use platform_get_irq_byname()
  in sub-drivers
- picked up review tags
- use devm_request_any_context_irq() for interrupt requests

LEDs:
- changed the max77650_leds_ prefix to max77650_led_
- drop the max77650_leds structure as the only field it held was the
  regmap pointer, move said pointer to struct max77650_led
- change the driver name to "max77650-led"
- drop the last return value check and return the result of
  regmap_write() directly
- change the labeling scheme to one consistent with other LED drivers

ONKEY:
- drop the key reporting helper and call the input functions directly
  from interrupt handlers
- rename the rv local variable to error
- drop parent device asignment

Regulator:
- drop the unnecessary init_data lookup from the driver code
- drop unnecessary include

Charger:
- disable the charger on driver remove
- change the power supply type to POWER_SUPPLY_TYPE_USB

GPIO:
- drop interrupt support until we have correct implementation of hierarchical
  irqs in gpiolib

Bartosz Golaszewski (13):
  dt-bindings: mfd: add DT bindings for max77650
  dt-bindings: regulator: add DT bindings for max77650
  dt-bindings: power: supply: add DT bindings for max77650
  dt-bindings: gpio: add DT bindings for max77650
  dt-bindings: leds: add DT bindings for max77650
  dt-bindings: input: add DT bindings for max77650
  mfd: max77650: new core mfd driver
  regulator: max77650: add regulator support
  power: supply: max77650: add support for battery charger
  gpio: max77650: add GPIO support
  leds: max77650: add LEDs support
  input: max77650: add onkey support
  MAINTAINERS: add an entry for max77650 mfd driver

 .../bindings/gpio/gpio-max77650.txt           |  34 ++
 .../bindings/input/max77650-onkey.txt         |  26 +
 .../bindings/leds/leds-max77650.txt           |  57 ++
 .../devicetree/bindings/mfd/max77650.txt      |  28 +
 .../power/supply/max77650-charger.txt         |  27 +
 .../bindings/regulator/max77650-regulator.txt |  41 ++
 MAINTAINERS                                   |  14 +
 drivers/gpio/Kconfig                          |   7 +
 drivers/gpio/Makefile                         |   1 +
 drivers/gpio/gpio-max77650.c                  | 189 +++++++
 drivers/input/misc/Kconfig                    |   9 +
 drivers/input/misc/Makefile                   |   1 +
 drivers/input/misc/max77650-onkey.c           | 127 +++++
 drivers/leds/Kconfig                          |   6 +
 drivers/leds/Makefile                         |   1 +
 drivers/leds/leds-max77650.c                  | 152 +++++
 drivers/mfd/Kconfig                           |  11 +
 drivers/mfd/Makefile                          |   1 +
 drivers/mfd/max77650.c                        | 338 ++++++++++++
 drivers/power/supply/Kconfig                  |   7 +
 drivers/power/supply/Makefile                 |   1 +
 drivers/power/supply/max77650-charger.c       | 355 ++++++++++++
 drivers/regulator/Kconfig                     |   8 +
 drivers/regulator/Makefile                    |   1 +
 drivers/regulator/max77650-regulator.c        | 518 ++++++++++++++++++
 include/linux/mfd/max77650.h                  |  59 ++
 26 files changed, 2019 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/gpio/gpio-max77650.txt
 create mode 100644 Documentation/devicetree/bindings/input/max77650-onkey.txt
 create mode 100644 Documentation/devicetree/bindings/leds/leds-max77650.txt
 create mode 100644 Documentation/devicetree/bindings/mfd/max77650.txt
 create mode 100644 Documentation/devicetree/bindings/power/supply/max77650-charger.txt
 create mode 100644 Documentation/devicetree/bindings/regulator/max77650-regulator.txt
 create mode 100644 drivers/gpio/gpio-max77650.c
 create mode 100644 drivers/input/misc/max77650-onkey.c
 create mode 100644 drivers/leds/leds-max77650.c
 create mode 100644 drivers/mfd/max77650.c
 create mode 100644 drivers/power/supply/max77650-charger.c
 create mode 100644 drivers/regulator/max77650-regulator.c
 create mode 100644 include/linux/mfd/max77650.h

-- 
2.20.1

[PATCH v2 01/13] dt-bindings: mfd: add DT bindings for max77650

[Bartosz Golaszewski]

From: Bartosz Golaszewski <bgolaszewski@baylibre.com>

Add a DT binding document for max77650 ultra-low power PMIC. This
describes the core mfd device.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
---
 .../devicetree/bindings/mfd/max77650.txt      | 28 +++++++++++++++++++
 1 file changed, 28 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/mfd/max77650.txt

diff --git a/Documentation/devicetree/bindings/mfd/max77650.txt b/Documentation/devicetree/bindings/mfd/max77650.txt
new file mode 100644
index 000000000000..84631d3b1e14
--- /dev/null
+++ b/Documentation/devicetree/bindings/mfd/max77650.txt
@@ -0,0 +1,28 @@
+MAX77650 ultra low-power PMIC from Maxim Integrated.
+
+Required properties:
+-------------------
+- compatible:		Must be "maxim,max77650"
+- reg:			I2C device address.
+- interrupts:		The interrupt on the parent the controller is
+			connected to.
+- interrupt-parent:	phandle of the parent interrupt controller.
+- interrupt-controller: Marks the device node as an interrupt controller.
+- #interrupt-cells:	Must be <2>.
+
+For device-tree bindings of sub-modules (regulator, power supply, GPIO, LEDs
+and onkey) refer to the binding documents under the respective sub-system
+directories.
+
+Example:
+--------
+
+	pmic: max77650@48 {
+		compatible = "maxim,max77650";
+		reg = <0x48>;
+
+		interrupt-controller;
+		interrupt-parent = <&gpio2>;
+		#interrupt-cells = <2>;
+		interrupts = <3 IRQ_TYPE_LEVEL_LOW>;
+	};
-- 
2.20.1

[PATCH] gpio fixup domain

[Bartosz Golaszewski]

From: Bartosz Golaszewski <bgolaszewski@baylibre.com>

---
 arch/arm/boot/dts/am335x-bone-common.dtsi |   4 +
 drivers/gpio/gpio-max77650.c              | 138 +++++++++++++++++++++-
 2 files changed, 136 insertions(+), 6 deletions(-)

diff --git a/arch/arm/boot/dts/am335x-bone-common.dtsi b/arch/arm/boot/dts/am335x-bone-common.dtsi
index 62f7f2ac191c..320b4c21fdf3 100644
--- a/arch/arm/boot/dts/am335x-bone-common.dtsi
+++ b/arch/arm/boot/dts/am335x-bone-common.dtsi
@@ -276,6 +276,10 @@
 
 			gpio-controller;
 			#gpio-cells = <2>;
+
+			interrupt-parent = <&pmic>;
+			interrupts = <0 IRQ_TYPE_LEVEL_LOW>;
+			interrupt-names = "GPI";
 		};
 
 		leds {
diff --git a/drivers/gpio/gpio-max77650.c b/drivers/gpio/gpio-max77650.c
index 3f03f4e8956c..03a5a2ed07f8 100644
--- a/drivers/gpio/gpio-max77650.c
+++ b/drivers/gpio/gpio-max77650.c
@@ -9,6 +9,7 @@
 #include <linux/i2c.h>
 #include <linux/mfd/max77650.h>
 #include <linux/module.h>
+#include <linux/of_irq.h>
 #include <linux/platform_device.h>
 #include <linux/regmap.h>
 
@@ -34,7 +35,8 @@
 struct max77650_gpio_chip {
 	struct regmap *map;
 	struct gpio_chip gc;
-	int irq;
+	struct fwnode_handle *fwnode;
+	struct irq_domain *domain;
 };
 
 static int max77650_gpio_direction_input(struct gpio_chip *gc,
@@ -130,20 +132,114 @@ static int max77650_gpio_set_config(struct gpio_chip *gc,
 	}
 }
 
+static struct irq_chip max77650_gpio_irq_chip = {
+	.name = "max77650-gpio",
+	.irq_ack = irq_chip_ack_parent,
+	.irq_mask = irq_chip_mask_parent,
+	.irq_unmask = irq_chip_unmask_parent,
+	.irq_set_type = irq_chip_set_type_parent,
+};
+
+static int max77650_gpio_irq_domain_activate(struct irq_domain *domain,
+					     struct irq_data *data,
+					     bool reserve)
+{
+	struct max77650_gpio_chip *chip = domain->host_data;
+
+	return gpiochip_lock_as_irq(&chip->gc, data->hwirq);
+}
+
+static void max77650_gpio_irq_domain_deactivate(struct irq_domain *domain,
+						struct irq_data *data)
+{
+	struct max77650_gpio_chip *chip = domain->host_data;
+
+	return gpiochip_unlock_as_irq(&chip->gc, data->hwirq);
+}
+
+static int max77650_gpio_domain_translate(struct irq_domain *domain,
+					  struct irq_fwspec *fwspec,
+					  unsigned long *hwirq,
+					  unsigned int *type)
+{
+	struct max77650_gpio_chip *chip = domain->host_data;
+
+	if (fwspec->param_count != 2 || fwspec->param[0] >= chip->gc.ngpio)
+		return -EINVAL;
+
+	*hwirq = fwspec->param[0];
+	*type = fwspec->param[1];
+
+	return 0;
+}
+
+static int max77650_gpio_domain_alloc(struct irq_domain *domain,
+				      unsigned int virq,
+				      unsigned int nr_irqs, void *data)
+{
+	struct max77650_gpio_chip *chip = domain->host_data;
+	struct irq_fwspec *fwspec = data;
+	struct irq_fwspec parent_fwspec;
+	irq_hw_number_t hwirq;
+	unsigned int type;
+	int ret;
+
+	if (nr_irqs != 1)
+		return -EINVAL;
+
+	ret = max77650_gpio_domain_translate(domain, fwspec, &hwirq, &type);
+	if (ret)
+		return ret;
+
+	irq_domain_set_info(domain, virq, hwirq,
+			    &max77650_gpio_irq_chip, chip,
+			    handle_level_irq, NULL, NULL);
+
+	parent_fwspec.fwnode = domain->parent->fwnode;
+	parent_fwspec.param_count = 4;
+	parent_fwspec.param[0] = 0;
+	parent_fwspec.param[1] = hwirq;
+	parent_fwspec.param[2] = 0;
+	parent_fwspec.param[3] = fwspec->param[1];
+
+	return irq_domain_alloc_irqs_parent(domain, virq, nr_irqs,
+					    &parent_fwspec);
+
+	return 0;
+}
+
+static const struct irq_domain_ops max77650_gpio_irq_domain_ops = {
+	.activate = max77650_gpio_irq_domain_activate,
+	.deactivate = max77650_gpio_irq_domain_deactivate,
+	.alloc = max77650_gpio_domain_alloc,
+	.free = irq_domain_free_irqs_common,
+	.translate = max77650_gpio_domain_translate,
+};
+
 static int max77650_gpio_to_irq(struct gpio_chip *gc, unsigned int offset)
 {
 	struct max77650_gpio_chip *chip = gpiochip_get_data(gc);
+	struct irq_fwspec fwspec;
+
+	fwspec.fwnode = chip->fwnode;
+	fwspec.param_count = 2;
+	fwspec.param[0] = 0;
+	fwspec.param[1] = IRQ_TYPE_LEVEL_LOW;
 
-	return chip->irq;
+	return irq_create_fwspec_mapping(&fwspec);
 }
 
 static int max77650_gpio_probe(struct platform_device *pdev)
 {
+	struct device_node *of_node, *parent_node;
+	struct irq_domain *parent_domain;
 	struct max77650_gpio_chip *chip;
 	struct device *dev, *parent;
 	struct i2c_client *i2c;
+	int rv;
 
 	dev = &pdev->dev;
+	of_node = dev->of_node;
 	parent = dev->parent;
 	i2c = to_i2c_client(parent);
 
@@ -151,13 +247,29 @@ static int max77650_gpio_probe(struct platform_device *pdev)
 	if (!chip)
 		return -ENOMEM;
 
+	chip->fwnode = dev->fwnode;
+	platform_set_drvdata(pdev, chip);
+
 	chip->map = dev_get_regmap(parent, NULL);
 	if (!chip->map)
 		return -ENODEV;
 
-	chip->irq = platform_get_irq_byname(pdev, "GPI");
-	if (chip->irq < 0)
-		return chip->irq;
+	parent_node = of_irq_find_parent(of_node);
+	if (!parent_node)
+		return -ENXIO;
+
+	parent_domain = irq_find_host(parent_node);
+	of_node_put(parent_node);
+	if (!parent_domain)
+		return -ENXIO;
+
+	chip->fwnode = of_node_to_fwnode(of_node);
+	chip->domain = irq_domain_create_hierarchy(parent_domain, 0, 1,
+						chip->fwnode,
+						&max77650_gpio_irq_domain_ops,
+						chip);
+	if (!chip->domain)
+		return -ENODEV;
 
 	chip->gc.base = -1;
 	chip->gc.ngpio = 1;
@@ -174,7 +286,20 @@ static int max77650_gpio_probe(struct platform_device *pdev)
 	chip->gc.set_config = max77650_gpio_set_config;
 	chip->gc.to_irq = max77650_gpio_to_irq;
 
-	return devm_gpiochip_add_data(dev, &chip->gc, chip);
+	rv = devm_gpiochip_add_data(dev, &chip->gc, chip);
+	if (rv)
+		irq_domain_remove(chip->domain);
+
+	return rv;
+}
+
+static int max77650_gpio_remove(struct platform_device *pdev)
+{
+	struct max77650_gpio_chip *chip = platform_get_drvdata(pdev);
+
+	irq_domain_remove(chip->domain);
+
+	return 0;
 }
 
 static struct platform_driver max77650_gpio_driver = {
@@ -182,6 +307,7 @@ static struct platform_driver max77650_gpio_driver = {
 		.name = "max77650-gpio",
 	},
 	.probe = max77650_gpio_probe,
+	.remove = max77650_gpio_remove,
 };
 module_platform_driver(max77650_gpio_driver);
 
-- 
2.20.1

[PATCH v2 02/13] dt-bindings: regulator: add DT bindings for max77650

[Bartosz Golaszewski]

From: Bartosz Golaszewski <bgolaszewski@baylibre.com>

Add the DT binding document for max77650 regulators.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
---
 .../bindings/regulator/max77650-regulator.txt | 41 +++++++++++++++++++
 1 file changed, 41 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/regulator/max77650-regulator.txt

diff --git a/Documentation/devicetree/bindings/regulator/max77650-regulator.txt b/Documentation/devicetree/bindings/regulator/max77650-regulator.txt
new file mode 100644
index 000000000000..f1cbe813c30f
--- /dev/null
+++ b/Documentation/devicetree/bindings/regulator/max77650-regulator.txt
@@ -0,0 +1,41 @@
+Regulator driver for MAX77650 PMIC from Maxim Integrated.
+
+This module is part of the MAX77650 MFD device. For more details
+see Documentation/devicetree/bindings/mfd/max77650.txt.
+
+The regulator controller is represented as a sub-node of the PMIC node
+on the device tree.
+
+The device has a single LDO regulator and a SIMO buck-boost regulator with
+three independent power rails.
+
+Required properties:
+--------------------
+- compatible:		Must be "maxim,max77650-regulator"
+
+Each rail must be instantiated under the regulators subnode of the top PMIC
+node. Up to four regulators can be defined. For standard regulator properties
+refer to Documentation/devicetree/bindings/regulator/regulator.txt.
+
+Available regulator compatible strings are: "ldo", "sbb0", "sbb1", "sbb2".
+
+Example:
+--------
+
+	regulators {
+		compatible = "maxim,max77650-regulator";
+
+		max77650_ldo: regulator@0 {
+			regulator-compatible = "ldo";
+			regulator-name = "max77650-ldo";
+			regulator-min-microvolt = <1350000>;
+			regulator-max-microvolt = <2937500>;
+		};
+
+		max77650_sbb0: regulator@1 {
+			regulator-compatible = "sbb0";
+			regulator-name = "max77650-sbb0";
+			regulator-min-microvolt = <800000>;
+			regulator-max-microvolt = <1587500>;
+		};
+	};
-- 
2.20.1

[PATCH v2 03/13] dt-bindings: power: supply: add DT bindings for max77650

[Bartosz Golaszewski]

From: Bartosz Golaszewski <bgolaszewski@baylibre.com>

Add the DT binding document for the battery charger module of max77650.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
---
 .../power/supply/max77650-charger.txt         | 27 +++++++++++++++++++
 1 file changed, 27 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/power/supply/max77650-charger.txt

diff --git a/Documentation/devicetree/bindings/power/supply/max77650-charger.txt b/Documentation/devicetree/bindings/power/supply/max77650-charger.txt
new file mode 100644
index 000000000000..f3e00d41e299
--- /dev/null
+++ b/Documentation/devicetree/bindings/power/supply/max77650-charger.txt
@@ -0,0 +1,27 @@
+Battery charger driver for MAX77650 PMIC from Maxim Integrated.
+
+This module is part of the MAX77650 MFD device. For more details
+see Documentation/devicetree/bindings/mfd/max77650.txt.
+
+The charger is represented as a sub-node of the PMIC node on the device tree.
+
+Required properties:
+--------------------
+- compatible:		Must be "maxim,max77650-charger"
+
+Optional properties:
+--------------------
+- maxim,vchgin-min:	Minimum CHGIN regulation voltage (in microvolts). Must be
+			one of: 4000000, 4100000, 4200000, 4300000, 4400000,
+			4500000, 4600000, 4700000.
+- maxim,ichgin-lim:	CHGIN input current limit (in microamps). Must be one of:
+			95000, 190000, 285000, 380000, 475000.
+
+Example:
+--------
+
+	charger {
+		compatible = "maxim,max77650-charger";
+		maxim,vchgin-min = <4200000>;
+		maxim,ichgin-lim = <285000>;
+	};
-- 
2.20.1

[PATCH v2 04/13] dt-bindings: gpio: add DT bindings for max77650

[Bartosz Golaszewski]

From: Bartosz Golaszewski <bgolaszewski@baylibre.com>

Add the DT binding document for the GPIO module of max77650.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
---
 .../bindings/gpio/gpio-max77650.txt           | 34 +++++++++++++++++++
 1 file changed, 34 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/gpio/gpio-max77650.txt

diff --git a/Documentation/devicetree/bindings/gpio/gpio-max77650.txt b/Documentation/devicetree/bindings/gpio/gpio-max77650.txt
new file mode 100644
index 000000000000..b5dbbe934deb
--- /dev/null
+++ b/Documentation/devicetree/bindings/gpio/gpio-max77650.txt
@@ -0,0 +1,34 @@
+GPIO driver for MAX77650 PMIC from Maxim Integrated.
+
+This module is part of the MAX77650 MFD device. For more details
+see Documentation/devicetree/bindings/mfd/max77650.txt.
+
+The GPIO controller is represented as a sub-node of the PMIC node on
+the device tree.
+
+This device has a single GPIO pin.
+
+Required properties:
+--------------------
+- compatible:		Must be "maxim,max77650-gpio"
+- gpio-controller : 	Marks the device node as a gpio controller.
+- #gpio-cells : 	Must be <2>. The first cell is the pin number and
+			the second cell is used to specify the gpio active
+			state.
+
+Optional properties:
+--------------------
+gpio-line-names:	Single string containing the name of the GPIO line.
+
+For more details, please refer to the generic GPIO DT binding document
+<devicetree/bindings/gpio/gpio.txt>.
+
+Example:
+--------
+
+	gpio {
+		compatible = "maxim,max77650-gpio";
+		gpio-line-names = "max77650-charger";
+		gpio-controller;
+		#gpio-cells = <2>;
+	};
-- 
2.20.1

[PATCH v2 05/13] dt-bindings: leds: add DT bindings for max77650

[Bartosz Golaszewski]

From: Bartosz Golaszewski <bgolaszewski@baylibre.com>

Add the DT binding document for the LEDs module of max77650.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
---
 .../bindings/leds/leds-max77650.txt           | 57 +++++++++++++++++++
 1 file changed, 57 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/leds/leds-max77650.txt

diff --git a/Documentation/devicetree/bindings/leds/leds-max77650.txt b/Documentation/devicetree/bindings/leds/leds-max77650.txt
new file mode 100644
index 000000000000..b2fac8e719a6
--- /dev/null
+++ b/Documentation/devicetree/bindings/leds/leds-max77650.txt
@@ -0,0 +1,57 @@
+LED driver for MAX77650 PMIC from Maxim Integrated.
+
+This module is part of the MAX77650 MFD device. For more details
+see Documentation/devicetree/bindings/mfd/max77650.txt.
+
+The LED controller is represented as a sub-node of the PMIC node on
+the device tree.
+
+This device has three current sinks.
+
+Required properties:
+--------------------
+- compatible:		Must be "maxim,max77650-led"
+- #address-cells:	Must be <1>.
+- #size-cells:		Must be <0>.
+
+Each LED is represented as a sub-node of the LED-controller node. Up to
+three sub-nodes can be defined.
+
+Required properties of the sub-node:
+------------------------------------
+
+- reg:			Must be <0>, <1> or <2>.
+
+Optional properties of the sub-node:
+------------------------------------
+
+- label:		See Documentation/devicetree/bindings/leds/common.txt
+- linux,default-trigger: See Documentation/devicetree/bindings/leds/common.txt
+
+For more details, please refer to the generic GPIO DT binding document
+<devicetree/bindings/gpio/gpio.txt>.
+
+Example:
+--------
+
+	leds {
+		compatible = "maxim,max77650-leds";
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		led@0 {
+			reg = <0>;
+			label = "blue:usr0";
+		};
+
+		led@1 {
+			reg = <1>;
+			label = "red:usr1";
+			linux,default-trigger = "heartbeat";
+		};
+
+		led@2 {
+			reg = <2>;
+			label = "green:usr2";
+		};
+	};
-- 
2.20.1

[PATCH v2 06/13] dt-bindings: input: add DT bindings for max77650

[Bartosz Golaszewski]

From: Bartosz Golaszewski <bgolaszewski@baylibre.com>

Add the DT binding document for the onkey module of max77650.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
---
 .../bindings/input/max77650-onkey.txt         | 26 +++++++++++++++++++
 1 file changed, 26 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/input/max77650-onkey.txt

diff --git a/Documentation/devicetree/bindings/input/max77650-onkey.txt b/Documentation/devicetree/bindings/input/max77650-onkey.txt
new file mode 100644
index 000000000000..37c80898be4d
--- /dev/null
+++ b/Documentation/devicetree/bindings/input/max77650-onkey.txt
@@ -0,0 +1,26 @@
+Onkey driver for MAX77650 PMIC from Maxim Integrated.
+
+This module is part of the MAX77650 MFD device. For more details
+see Documentation/devicetree/bindings/mfd/max77650.txt.
+
+The onkey controller is represented as a sub-node of the PMIC node on
+the device tree.
+
+Required properties:
+--------------------
+- compatible:		Must be "maxim,max77650-onkey".
+
+Optional properties:
+- linux,code:		The key-code to be reported when the key is pressed.
+			Defaults to KEY_POWER.
+- maxim,onkey-mode:	Must be "push" or "slide" depending on the type of
+			button used by the system. Defaults to "push".
+
+Example:
+--------
+
+	onkey {
+		compatible = "maxim,max77650-onkey";
+		linux,code = <KEY_END>;
+		maxim,onkey-mode = "slide";
+	};
-- 
2.20.1

[PATCH v2 07/13] mfd: max77650: new core mfd driver

[Bartosz Golaszewski]

From: Bartosz Golaszewski <bgolaszewski@baylibre.com>

Add the core mfd driver for max77650 PMIC. We define five sub-devices
for which the drivers will be added in subsequent patches.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
---
 drivers/mfd/Kconfig          |  11 ++
 drivers/mfd/Makefile         |   1 +
 drivers/mfd/max77650.c       | 338 +++++++++++++++++++++++++++++++++++
 include/linux/mfd/max77650.h |  59 ++++++
 4 files changed, 409 insertions(+)
 create mode 100644 drivers/mfd/max77650.c
 create mode 100644 include/linux/mfd/max77650.h

diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index f461460a2aeb..828fd193b4ee 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -734,6 +734,17 @@ config MFD_MAX77620
 	  provides common support for accessing the device; additional drivers
 	  must be enabled in order to use the functionality of the device.
 
+config MFD_MAX77650
+	tristate "Maxim MAX77650/77651 PMIC Support"
+	depends on I2C
+	depends on OF || COMPILE_TEST
+	select MFD_CORE
+	select REGMAP_I2C
+	help
+	  Say yes here to add support for Maxim Semiconductor MAX77650 and
+	  MAX77651 Power Management ICs. This is the core multifunction
+	  driver for interacting with the device.
+
 config MFD_MAX77686
 	tristate "Maxim Semiconductor MAX77686/802 PMIC Support"
 	depends on I2C
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index 12980a4ad460..3b912a4015d1 100644
--- a/drivers/mfd/Makefile
+++ b/drivers/mfd/Makefile
@@ -151,6 +151,7 @@ obj-$(CONFIG_MFD_DA9150)	+= da9150-core.o
 
 obj-$(CONFIG_MFD_MAX14577)	+= max14577.o
 obj-$(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_MAX77843)	+= max77843.o
diff --git a/drivers/mfd/max77650.c b/drivers/mfd/max77650.c
new file mode 100644
index 000000000000..a89a5ea421f8
--- /dev/null
+++ b/drivers/mfd/max77650.c
@@ -0,0 +1,338 @@
+// SPDX-License-Identifier: GPL-2.0
+//
+// Copyright (C) 2018 BayLibre SAS
+// Author: Bartosz Golaszewski <bgolaszewski@baylibre.com>
+//
+// Core MFD driver for MAXIM 77650/77651 charger/power-supply.
+
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/mfd/core.h>
+#include <linux/mfd/max77650.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/regmap.h>
+#include <linux/slab.h>
+
+#define MAX77650_INT_GPI_F_MSK		BIT(0)
+#define MAX77650_INT_GPI_R_MSK		BIT(1)
+#define MAX77650_INT_GPI_MSK \
+			(MAX77650_INT_GPI_F_MSK | MAX77650_INT_GPI_R_MSK)
+#define MAX77650_INT_nEN_F_MSK		BIT(2)
+#define MAX77650_INT_nEN_R_MSK		BIT(3)
+#define MAX77650_INT_TJAL1_R_MSK	BIT(4)
+#define MAX77650_INT_TJAL2_R_MSK	BIT(5)
+#define MAX77650_INT_DOD_R_MSK		BIT(6)
+
+#define MAX77650_INT_THM_MSK		BIT(0)
+#define MAX77650_INT_CHG_MSK		BIT(1)
+#define MAX77650_INT_CHGIN_MSK		BIT(2)
+#define MAX77650_INT_TJ_REG_MSK		BIT(3)
+#define MAX77650_INT_CHGIN_CTRL_MSK	BIT(4)
+#define MAX77650_INT_SYS_CTRL_MSK	BIT(5)
+#define MAX77650_INT_SYS_CNFG_MSK	BIT(6)
+
+#define MAX77650_INT_GLBL_OFFSET	0
+#define MAX77650_INT_CHG_OFFSET		1
+
+#define MAX77650_SBIA_LPM_MASK		BIT(5)
+#define MAX77650_SBIA_LPM_DISABLED	0x00
+
+#define MAX77650_INT_GPI		0
+#define MAX77650_INT_nEN_F		1
+#define MAX77650_INT_nEN_R		2
+#define MAX77650_INT_TJAL1_R		3
+#define MAX77650_INT_TJAL2_R		4
+#define MAX77650_INT_DOD_R		5
+#define MAX77650_INT_THM		6
+#define MAX77650_INT_CHG		7
+#define MAX77650_INT_CHGIN		8
+#define MAX77650_INT_TJ_REG		9
+#define MAX77650_INT_CHGIN_CTRL		10
+#define MAX77650_INT_SYS_CTRL		11
+#define MAX77650_INT_SYS_CNFG		12
+
+enum {
+	MAX77650_CELL_REGULATOR = 0,
+	MAX77650_CELL_CHARGER,
+	MAX77650_CELL_GPIO,
+	MAX77650_CELL_LED,
+	MAX77650_CELL_ONKEY,
+	MAX77650_NUM_CELLS,
+};
+
+struct max77650_irq_mapping {
+	int cell_num;
+	const int *irqs;
+	const char **irq_names;
+	unsigned int num_irqs;
+};
+
+static const int max77650_charger_irqs[] = {
+	MAX77650_INT_CHG,
+	MAX77650_INT_CHGIN,
+};
+
+static const int max77650_gpio_irqs[] = {
+	MAX77650_INT_GPI,
+};
+
+static const int max77650_onkey_irqs[] = {
+	MAX77650_INT_nEN_F,
+	MAX77650_INT_nEN_R,
+};
+
+static const char *max77650_charger_irq_names[] = {
+	"CHG",
+	"CHGIN",
+};
+
+static const char *max77650_gpio_irq_names[] = {
+	"GPI",
+};
+
+static const char *max77650_onkey_irq_names[] = {
+	"nEN_F",
+	"nEN_R",
+};
+
+static const struct max77650_irq_mapping max77650_irq_mapping_table[] = {
+	{
+		.cell_num	= MAX77650_CELL_CHARGER,
+		.irqs		= max77650_charger_irqs,
+		.irq_names	= max77650_charger_irq_names,
+		.num_irqs	= ARRAY_SIZE(max77650_charger_irqs),
+	},
+	{
+		.cell_num	= MAX77650_CELL_GPIO,
+		.irqs		= max77650_gpio_irqs,
+		.irq_names	= max77650_gpio_irq_names,
+		.num_irqs	= ARRAY_SIZE(max77650_gpio_irqs),
+	},
+	{
+		.cell_num	= MAX77650_CELL_ONKEY,
+		.irqs		= max77650_onkey_irqs,
+		.irq_names	= max77650_onkey_irq_names,
+		.num_irqs	= ARRAY_SIZE(max77650_onkey_irqs),
+	},
+};
+
+static const struct mfd_cell max77650_cells[] = {
+	[MAX77650_CELL_REGULATOR] = {
+		.name		= "max77650-regulator",
+		.of_compatible	= "maxim,max77650-regulator",
+	},
+	[MAX77650_CELL_CHARGER] = {
+		.name		= "max77650-charger",
+		.of_compatible	= "maxim,max77650-charger",
+	},
+	[MAX77650_CELL_GPIO] = {
+		.name		= "max77650-gpio",
+		.of_compatible	= "maxim,max77650-gpio",
+	},
+	[MAX77650_CELL_LED] = {
+		.name		= "max77650-led",
+		.of_compatible	= "maxim,max77650-led",
+	},
+	[MAX77650_CELL_ONKEY] = {
+		.name		= "max77650-onkey",
+		.of_compatible	= "maxim,max77650-onkey",
+	},
+};
+
+static const struct regmap_irq max77650_irqs[] = {
+	[MAX77650_INT_GPI] = {
+		.reg_offset		= MAX77650_INT_GLBL_OFFSET,
+		.mask			= MAX77650_INT_GPI_MSK,
+		.type = {
+			.type_falling_val	= MAX77650_INT_GPI_F_MSK,
+			.type_rising_val	= MAX77650_INT_GPI_R_MSK,
+			.types_supported	= IRQ_TYPE_EDGE_BOTH,
+		},
+	},
+	[MAX77650_INT_nEN_F] = {
+		.reg_offset		= MAX77650_INT_GLBL_OFFSET,
+		.mask			= MAX77650_INT_nEN_F_MSK,
+	},
+	[MAX77650_INT_nEN_R] = {
+		.reg_offset		= MAX77650_INT_GLBL_OFFSET,
+		.mask			= MAX77650_INT_nEN_R_MSK,
+	},
+	[MAX77650_INT_TJAL1_R] = {
+		.reg_offset		= MAX77650_INT_GLBL_OFFSET,
+		.mask			= MAX77650_INT_TJAL1_R_MSK,
+	},
+	[MAX77650_INT_TJAL2_R] = {
+		.reg_offset		= MAX77650_INT_GLBL_OFFSET,
+		.mask			= MAX77650_INT_TJAL2_R_MSK,
+	},
+	[MAX77650_INT_DOD_R] = {
+		.reg_offset		= MAX77650_INT_GLBL_OFFSET,
+		.mask			= MAX77650_INT_DOD_R_MSK,
+	},
+	[MAX77650_INT_THM] = {
+		.reg_offset		= MAX77650_INT_CHG_OFFSET,
+		.mask			= MAX77650_INT_THM_MSK,
+	},
+	[MAX77650_INT_CHG] = {
+		.reg_offset		= MAX77650_INT_CHG_OFFSET,
+		.mask			= MAX77650_INT_CHG_MSK,
+	},
+	[MAX77650_INT_CHGIN] = {
+		.reg_offset		= MAX77650_INT_CHG_OFFSET,
+		.mask			= MAX77650_INT_CHGIN_MSK,
+	},
+	[MAX77650_INT_TJ_REG] = {
+		.reg_offset		= MAX77650_INT_CHG_OFFSET,
+		.mask			= MAX77650_INT_TJ_REG_MSK,
+	},
+	[MAX77650_INT_CHGIN_CTRL] = {
+		.reg_offset		= MAX77650_INT_CHG_OFFSET,
+		.mask			= MAX77650_INT_CHGIN_CTRL_MSK,
+	},
+	[MAX77650_INT_SYS_CTRL] = {
+		.reg_offset		= MAX77650_INT_CHG_OFFSET,
+		.mask			= MAX77650_INT_SYS_CTRL_MSK,
+	},
+	[MAX77650_INT_SYS_CNFG] = {
+		.reg_offset		= MAX77650_INT_CHG_OFFSET,
+		.mask			= MAX77650_INT_SYS_CNFG_MSK,
+	},
+};
+
+static const struct regmap_irq_chip max77650_irq_chip = {
+	.name			= "max77650-irq",
+	.irqs			= max77650_irqs,
+	.num_irqs		= ARRAY_SIZE(max77650_irqs),
+	.num_regs		= 2,
+	.status_base		= MAX77650_REG_INT_GLBL,
+	.mask_base		= MAX77650_REG_INTM_GLBL,
+	.type_in_mask		= true,
+	.type_invert		= true,
+	.init_ack_masked	= true,
+	.clear_on_unmask	= true,
+};
+
+static const struct regmap_config max77650_regmap_config = {
+	.name		= "max77650",
+	.reg_bits	= 8,
+	.val_bits	= 8,
+};
+
+static int max77650_setup_irqs(struct device *dev, struct mfd_cell *cells)
+{
+	const struct max77650_irq_mapping *mapping;
+	struct regmap_irq_chip_data *irq_data;
+	struct i2c_client *i2c;
+	struct mfd_cell *cell;
+	struct resource *res;
+	struct regmap *map;
+	int i, j, irq, rv;
+
+	i2c = to_i2c_client(dev);
+
+	map = dev_get_regmap(dev, NULL);
+	if (!map)
+		return -ENODEV;
+
+	rv = devm_regmap_add_irq_chip(dev, map, i2c->irq,
+				      IRQF_ONESHOT | IRQF_SHARED, -1,
+				      &max77650_irq_chip, &irq_data);
+	if (rv)
+		return rv;
+
+	for (i = 0; i < ARRAY_SIZE(max77650_irq_mapping_table); i++) {
+		mapping = &max77650_irq_mapping_table[i];
+		cell = &cells[mapping->cell_num];
+
+		res = devm_kcalloc(dev, sizeof(*res),
+				   mapping->num_irqs, GFP_KERNEL);
+		if (!res)
+			return -ENOMEM;
+
+		cell->resources = res;
+		cell->num_resources = mapping->num_irqs;
+
+		for (j = 0; j < mapping->num_irqs; j++) {
+			irq = regmap_irq_get_virq(irq_data, mapping->irqs[j]);
+			if (irq < 0)
+				return irq;
+
+			res[j].start = res[j].end = irq;
+			res[j].flags = IORESOURCE_IRQ;
+			res[j].name = mapping->irq_names[j];
+		}
+	}
+
+	return 0;
+}
+
+static int max77650_i2c_probe(struct i2c_client *i2c)
+{
+	struct device *dev = &i2c->dev;
+	struct mfd_cell *cells;
+	struct regmap *map;
+	unsigned int val;
+	int rv;
+
+	map = devm_regmap_init_i2c(i2c, &max77650_regmap_config);
+	if (IS_ERR(map))
+		return PTR_ERR(map);
+
+	rv = regmap_read(map, MAX77650_REG_CID, &val);
+	if (rv)
+		return rv;
+
+	switch (MAX77650_CID_BITS(val)) {
+	case MAX77650_CID_77650A:
+	case MAX77650_CID_77650C:
+	case MAX77650_CID_77651A:
+	case MAX77650_CID_77651B:
+		break;
+	default:
+		return -ENODEV;
+	}
+
+	/*
+	 * This IC has a low-power mode which reduces the quiescent current
+	 * consumption to ~5.6uA but is only suitable for systems consuming
+	 * less than ~2mA. Since this is not likely the case even on
+	 * linux-based wearables - keep the chip in normal power mode.
+	 */
+	rv = regmap_update_bits(map,
+				MAX77650_REG_CNFG_GLBL,
+				MAX77650_SBIA_LPM_MASK,
+				MAX77650_SBIA_LPM_DISABLED);
+	if (rv)
+		return rv;
+
+	cells = devm_kmemdup(dev, max77650_cells,
+			     sizeof(max77650_cells), GFP_KERNEL);
+	if (!cells)
+		return -ENOMEM;
+
+	rv = max77650_setup_irqs(dev, cells);
+	if (rv)
+		return rv;
+
+	return devm_mfd_add_devices(dev, -1, cells,
+				    MAX77650_NUM_CELLS, NULL, 0, NULL);
+}
+
+static const struct of_device_id max77650_of_match[] = {
+	{ .compatible = "maxim,max77650", },
+};
+
+static struct i2c_driver max77650_i2c_driver = {
+	.driver = {
+		.name = "max77650",
+		.of_match_table = of_match_ptr(max77650_of_match),
+	},
+	.probe_new = max77650_i2c_probe,
+};
+module_i2c_driver(max77650_i2c_driver);
+
+MODULE_DESCRIPTION("MAXIM 77650/77651 multi-function core driver");
+MODULE_AUTHOR("Bartosz Golaszewski <bgolaszewski@baylibre.com>");
+MODULE_LICENSE("GPL v2");
diff --git a/include/linux/mfd/max77650.h b/include/linux/mfd/max77650.h
new file mode 100644
index 000000000000..c809e211a8cd
--- /dev/null
+++ b/include/linux/mfd/max77650.h
@@ -0,0 +1,59 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2018 BayLibre SAS
+ * Author: Bartosz Golaszewski <bgolaszewski@baylibre.com>
+ *
+ * Common definitions for MAXIM 77650/77651 charger/power-supply.
+ */
+
+#ifndef MAX77650_H
+#define MAX77650_H
+
+#include <linux/bits.h>
+
+#define MAX77650_REG_INT_GLBL		0x00
+#define MAX77650_REG_INT_CHG		0x01
+#define MAX77650_REG_STAT_CHG_A		0x02
+#define MAX77650_REG_STAT_CHG_B		0x03
+#define MAX77650_REG_ERCFLAG		0x04
+#define MAX77650_REG_STAT_GLBL		0x05
+#define MAX77650_REG_INTM_GLBL		0x06
+#define MAX77650_REG_INTM_CHG		0x07
+#define MAX77650_REG_CNFG_GLBL		0x10
+#define MAX77650_REG_CID		0x11
+#define MAX77650_REG_CNFG_GPIO		0x12
+#define MAX77650_REG_CNFG_CHG_A		0x18
+#define MAX77650_REG_CNFG_CHG_B		0x19
+#define MAX77650_REG_CNFG_CHG_C		0x1a
+#define MAX77650_REG_CNFG_CHG_D		0x1b
+#define MAX77650_REG_CNFG_CHG_E		0x1c
+#define MAX77650_REG_CNFG_CHG_F		0x1d
+#define MAX77650_REG_CNFG_CHG_G		0x1e
+#define MAX77650_REG_CNFG_CHG_H		0x1f
+#define MAX77650_REG_CNFG_CHG_I		0x20
+#define MAX77650_REG_CNFG_SBB_TOP	0x28
+#define MAX77650_REG_CNFG_SBB0_A	0x29
+#define MAX77650_REG_CNFG_SBB0_B	0x2a
+#define MAX77650_REG_CNFG_SBB1_A	0x2b
+#define MAX77650_REG_CNFG_SBB1_B	0x2c
+#define MAX77650_REG_CNFG_SBB2_A	0x2d
+#define MAX77650_REG_CNFG_SBB2_B	0x2e
+#define MAX77650_REG_CNFG_LDO_A		0x38
+#define MAX77650_REG_CNFG_LDO_B		0x39
+#define MAX77650_REG_CNFG_LED0_A	0x40
+#define MAX77650_REG_CNFG_LED1_A	0x41
+#define MAX77650_REG_CNFG_LED2_A	0x42
+#define MAX77650_REG_CNFG_LED0_B	0x43
+#define MAX77650_REG_CNFG_LED1_B	0x44
+#define MAX77650_REG_CNFG_LED2_B	0x45
+#define MAX77650_REG_CNFG_LED_TOP	0x46
+
+#define MAX77650_CID_MASK		GENMASK(3, 0)
+#define MAX77650_CID_BITS(_reg)		(_reg & MAX77650_CID_MASK)
+
+#define MAX77650_CID_77650A		0x03
+#define MAX77650_CID_77650C		0x0a
+#define MAX77650_CID_77651A		0x06
+#define MAX77650_CID_77651B		0x08
+
+#endif /* MAX77650_H */
-- 
2.20.1

[PATCH v2 08/13] regulator: max77650: add regulator support

[Bartosz Golaszewski]

From: Bartosz Golaszewski <bgolaszewski@baylibre.com>

Add regulator support for max77650. We support all four variants of this
PMIC including non-linear voltage table for max77651 SBB1 rail.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
---
 drivers/regulator/Kconfig              |   8 +
 drivers/regulator/Makefile             |   1 +
 drivers/regulator/max77650-regulator.c | 518 +++++++++++++++++++++++++
 3 files changed, 527 insertions(+)
 create mode 100644 drivers/regulator/max77650-regulator.c

diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig
index ee60a222f5eb..514f094f9444 100644
--- a/drivers/regulator/Kconfig
+++ b/drivers/regulator/Kconfig
@@ -457,6 +457,14 @@ config REGULATOR_MAX77620
 	  chip to control Step-Down DC-DC and LDOs. Say Y here to
 	  enable the regulator driver.
 
+config REGULATOR_MAX77650
+	tristate "Maxim MAX77650/77651 regulator support"
+	depends on MFD_MAX77650
+	help
+	  Regulator driver for MAX77650/77651 PMIC from Maxim
+	  Semiconductor. This device has a SIMO with three independent
+	  power rails and an LDO.
+
 config REGULATOR_MAX8649
 	tristate "Maxim 8649 voltage regulator"
 	depends on I2C
diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile
index b12e1c9b2118..7de79a12b0b7 100644
--- a/drivers/regulator/Makefile
+++ b/drivers/regulator/Makefile
@@ -60,6 +60,7 @@ obj-$(CONFIG_REGULATOR_LTC3676) += ltc3676.o
 obj-$(CONFIG_REGULATOR_MAX14577) += max14577-regulator.o
 obj-$(CONFIG_REGULATOR_MAX1586) += max1586.o
 obj-$(CONFIG_REGULATOR_MAX77620) += max77620-regulator.o
+obj-$(CONFIG_REGULATOR_MAX77650) += max77650-regulator.o
 obj-$(CONFIG_REGULATOR_MAX8649)	+= max8649.o
 obj-$(CONFIG_REGULATOR_MAX8660) += max8660.o
 obj-$(CONFIG_REGULATOR_MAX8907) += max8907-regulator.o
diff --git a/drivers/regulator/max77650-regulator.c b/drivers/regulator/max77650-regulator.c
new file mode 100644
index 000000000000..474f2c02f2d5
--- /dev/null
+++ b/drivers/regulator/max77650-regulator.c
@@ -0,0 +1,518 @@
+// SPDX-License-Identifier: GPL-2.0
+//
+// Copyright (C) 2018 BayLibre SAS
+// Author: Bartosz Golaszewski <bgolaszewski@baylibre.com>
+//
+// Regulator driver for MAXIM 77650/77651 charger/power-supply.
+
+#include <linux/i2c.h>
+#include <linux/mfd/max77650.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <linux/regulator/driver.h>
+
+#define MAX77650_REGULATOR_EN_CTRL_MASK		GENMASK(3, 0)
+#define MAX77650_REGULATOR_EN_CTRL_BITS(_reg) \
+		((_reg) & MAX77650_REGULATOR_EN_CTRL_MASK)
+#define MAX77650_REGULATOR_ENABLED		GENMASK(2, 1)
+#define MAX77650_REGULATOR_DISABLED		BIT(2)
+
+#define MAX77650_REGULATOR_V_LDO_MASK		GENMASK(6, 0)
+#define MAX77650_REGULATOR_V_SBB_MASK		GENMASK(5, 0)
+
+#define MAX77650_REGULATOR_AD_MASK		BIT(3)
+#define MAX77650_REGULATOR_AD_DISABLED		0x00
+#define MAX77650_REGULATOR_AD_ENABLED		BIT(3)
+
+#define MAX77650_REGULATOR_CURR_LIM_MASK	GENMASK(7, 6)
+#define MAX77650_REGULATOR_CURR_LIM_BITS(_reg) \
+		(((_reg) & MAX77650_REGULATOR_CURR_LIM_MASK) >> 6)
+#define MAX77650_REGULATOR_CURR_LIM_SHIFT(_val)	((_val) << 6)
+
+enum {
+	MAX77650_REGULATOR_ID_LDO = 0,
+	MAX77650_REGULATOR_ID_SBB0,
+	MAX77650_REGULATOR_ID_SBB1,
+	MAX77650_REGULATOR_ID_SBB2,
+	MAX77650_REGULATOR_NUM_REGULATORS,
+};
+
+struct max77650_regulator_desc {
+	struct regulator_desc desc;
+	unsigned int regA;
+	unsigned int regB;
+};
+
+static const u32 max77651_sbb1_regulator_volt_table[] = {
+	2400000, 3200000, 4000000, 4800000,
+	2450000, 3250000, 4050000, 4850000,
+	2500000, 3300000, 4100000, 4900000,
+	2550000, 3350000, 4150000, 4950000,
+	2600000, 3400000, 4200000, 5000000,
+	2650000, 3450000, 4250000, 5050000,
+	2700000, 3500000, 4300000, 5100000,
+	2750000, 3550000, 4350000, 5150000,
+	2800000, 3600000, 4400000, 5200000,
+	2850000, 3650000, 4450000, 5250000,
+	2900000, 3700000, 4500000,       0,
+	2950000, 3750000, 4550000,       0,
+	3000000, 3800000, 4600000,       0,
+	3050000, 3850000, 4650000,       0,
+	3100000, 3900000, 4700000,       0,
+	3150000, 3950000, 4750000,       0,
+};
+
+#define MAX77651_REGULATOR_SBB1_SEL_DEC(_val) \
+		(((_val & 0x3c) >> 2) | ((_val & 0x03) << 4))
+#define MAX77651_REGULATOR_SBB1_SEL_ENC(_val) \
+		(((_val & 0x30) >> 4) | ((_val & 0x0f) << 2))
+
+#define MAX77650_REGULATOR_SBB1_SEL_DECR(_val)				\
+	do {								\
+		_val = MAX77651_REGULATOR_SBB1_SEL_DEC(_val);		\
+		_val--;							\
+		_val = MAX77651_REGULATOR_SBB1_SEL_ENC(_val);		\
+	} while (0)
+
+#define MAX77650_REGULATOR_SBB1_SEL_INCR(_val)				\
+	do {								\
+		_val = MAX77651_REGULATOR_SBB1_SEL_DEC(_val);		\
+		_val++;							\
+		_val = MAX77651_REGULATOR_SBB1_SEL_ENC(_val);		\
+	} while (0)
+
+static const int max77650_current_limit_table[] = {
+	1000000, 866000, 707000, 500000,
+};
+
+static int max77650_regulator_is_enabled(struct regulator_dev *rdev)
+{
+	struct max77650_regulator_desc *rdesc;
+	struct regmap *map;
+	int val, rv, en;
+
+	rdesc = rdev_get_drvdata(rdev);
+	map = rdev_get_regmap(rdev);
+
+	rv = regmap_read(map, rdesc->regB, &val);
+	if (rv)
+		return rv;
+
+	en = MAX77650_REGULATOR_EN_CTRL_BITS(val);
+
+	return en != MAX77650_REGULATOR_DISABLED;
+}
+
+static int max77650_regulator_enable(struct regulator_dev *rdev)
+{
+	struct max77650_regulator_desc *rdesc;
+	struct regmap *map;
+
+	rdesc = rdev_get_drvdata(rdev);
+	map = rdev_get_regmap(rdev);
+
+	return regmap_update_bits(map, rdesc->regB,
+				  MAX77650_REGULATOR_EN_CTRL_MASK,
+				  MAX77650_REGULATOR_ENABLED);
+}
+
+static int max77650_regulator_disable(struct regulator_dev *rdev)
+{
+	struct max77650_regulator_desc *rdesc;
+	struct regmap *map;
+
+	rdesc = rdev_get_drvdata(rdev);
+	map = rdev_get_regmap(rdev);
+
+	return regmap_update_bits(map, rdesc->regB,
+				  MAX77650_REGULATOR_EN_CTRL_MASK,
+				  MAX77650_REGULATOR_DISABLED);
+}
+
+static int max77650_regulator_set_voltage_sel(struct regulator_dev *rdev,
+					      unsigned int sel)
+{
+	int rv = 0, curr, diff;
+	bool ascending;
+
+	/*
+	 * If the regulator is disabled, we can program the desired
+	 * voltage right away.
+	 */
+	if (!max77650_regulator_is_enabled(rdev))
+		return regulator_set_voltage_sel_regmap(rdev, sel);
+
+	/*
+	 * Otherwise we need to manually ramp the output voltage up/down
+	 * one step at a time.
+	 */
+
+	curr = regulator_get_voltage_sel_regmap(rdev);
+	if (curr < 0)
+		return curr;
+
+	diff = curr - sel;
+	if (diff == 0)
+		return 0; /* Already there. */
+	else if (diff > 0)
+		ascending = false;
+	else
+		ascending = true;
+
+	/*
+	 * Make sure we'll get to the right voltage and break the loop even if
+	 * the selector equals 0.
+	 */
+	for (ascending ? curr++ : curr--;; ascending ? curr++ : curr--) {
+		rv = regulator_set_voltage_sel_regmap(rdev, curr);
+		if (rv)
+			return rv;
+
+		if (curr == sel)
+			break;
+	}
+
+	return 0;
+}
+
+/*
+ * Special case: non-linear voltage table for max77651 SBB1 - software
+ * must ensure the voltage is ramped in 50mV increments.
+ */
+static int max77651_regulator_sbb1_set_voltage_sel(struct regulator_dev *rdev,
+						   unsigned int sel)
+{
+	int rv = 0, curr, vcurr, vdest, vdiff;
+
+	/*
+	 * If the regulator is disabled, we can program the desired
+	 * voltage right away.
+	 */
+	if (!max77650_regulator_is_enabled(rdev))
+		return regulator_set_voltage_sel_regmap(rdev, sel);
+
+	curr = regulator_get_voltage_sel_regmap(rdev);
+	if (curr < 0)
+		return curr;
+
+	if (curr == sel)
+		return 0; /* Already there. */
+
+	vcurr = max77651_sbb1_regulator_volt_table[curr];
+	vdest = max77651_sbb1_regulator_volt_table[sel];
+	vdiff = vcurr - vdest;
+
+	for (;;) {
+		if (vdiff > 0)
+			MAX77650_REGULATOR_SBB1_SEL_DECR(curr);
+		else
+			MAX77650_REGULATOR_SBB1_SEL_INCR(curr);
+
+		rv = regulator_set_voltage_sel_regmap(rdev, curr);
+		if (rv)
+			return rv;
+
+		if (curr == sel)
+			break;
+	};
+
+	return 0;
+}
+
+static int max77650_regulator_get_current_limit(struct regulator_dev *rdev)
+{
+	struct max77650_regulator_desc *rdesc;
+	struct regmap *map;
+	int val, rv, limit;
+
+	rdesc = rdev_get_drvdata(rdev);
+	map = rdev_get_regmap(rdev);
+
+	rv = regmap_read(map, rdesc->regA, &val);
+	if (rv)
+		return rv;
+
+	limit = MAX77650_REGULATOR_CURR_LIM_BITS(val);
+
+	return max77650_current_limit_table[limit];
+}
+
+static int max77650_regulator_set_current_limit(struct regulator_dev *rdev,
+						int min_uA, int max_uA)
+{
+	struct max77650_regulator_desc *rdesc;
+	struct regmap *map;
+	int rv, i, limit;
+
+	rdesc = rdev_get_drvdata(rdev);
+	map = rdev_get_regmap(rdev);
+
+	for (i = 0; i < ARRAY_SIZE(max77650_current_limit_table); i++) {
+		limit = max77650_current_limit_table[i];
+
+		if (limit >= min_uA && limit <= max_uA) {
+			rv = regmap_update_bits(map, rdesc->regA,
+					MAX77650_REGULATOR_CURR_LIM_MASK,
+					MAX77650_REGULATOR_CURR_LIM_SHIFT(i));
+			if (rv)
+				return rv;
+		}
+	}
+
+	return -EINVAL;
+}
+
+static const struct regulator_ops max77650_regulator_LDO_ops = {
+	.is_enabled		= max77650_regulator_is_enabled,
+	.enable			= max77650_regulator_enable,
+	.disable		= max77650_regulator_disable,
+	.list_voltage		= regulator_list_voltage_linear,
+	.map_voltage		= regulator_map_voltage_linear,
+	.get_voltage_sel	= regulator_get_voltage_sel_regmap,
+	.set_voltage_sel	= max77650_regulator_set_voltage_sel,
+	.set_active_discharge	= regulator_set_active_discharge_regmap,
+};
+
+static const struct regulator_ops max77650_regulator_SBB_ops = {
+	.is_enabled		= max77650_regulator_is_enabled,
+	.enable			= max77650_regulator_enable,
+	.disable		= max77650_regulator_disable,
+	.list_voltage		= regulator_list_voltage_linear,
+	.map_voltage		= regulator_map_voltage_linear,
+	.get_voltage_sel	= regulator_get_voltage_sel_regmap,
+	.set_voltage_sel	= max77650_regulator_set_voltage_sel,
+	.get_current_limit	= max77650_regulator_get_current_limit,
+	.set_current_limit	= max77650_regulator_set_current_limit,
+	.set_active_discharge	= regulator_set_active_discharge_regmap,
+};
+
+/* Special case for max77651 SBB1 - non-linear voltage mapping. */
+static const struct regulator_ops max77651_SBB1_regulator_ops = {
+	.is_enabled		= max77650_regulator_is_enabled,
+	.enable			= max77650_regulator_enable,
+	.disable		= max77650_regulator_disable,
+	.list_voltage		= regulator_list_voltage_table,
+	.get_voltage_sel	= regulator_get_voltage_sel_regmap,
+	.set_voltage_sel	= max77651_regulator_sbb1_set_voltage_sel,
+	.get_current_limit	= max77650_regulator_get_current_limit,
+	.set_current_limit	= max77650_regulator_set_current_limit,
+	.set_active_discharge	= regulator_set_active_discharge_regmap,
+};
+
+static struct max77650_regulator_desc max77650_LDO_desc = {
+	.desc = {
+		.name			= "ldo",
+		.of_match		= of_match_ptr("ldo"),
+		.regulators_node	= of_match_ptr("regulators"),
+		.supply_name		= "in-ldo",
+		.id			= MAX77650_REGULATOR_ID_LDO,
+		.ops			= &max77650_regulator_LDO_ops,
+		.min_uV			= 1350000,
+		.uV_step		= 12500,
+		.n_voltages		= 128,
+		.vsel_mask		= MAX77650_REGULATOR_V_LDO_MASK,
+		.vsel_reg		= MAX77650_REG_CNFG_LDO_A,
+		.active_discharge_off	= MAX77650_REGULATOR_AD_DISABLED,
+		.active_discharge_on	= MAX77650_REGULATOR_AD_ENABLED,
+		.active_discharge_mask	= MAX77650_REGULATOR_AD_MASK,
+		.active_discharge_reg	= MAX77650_REG_CNFG_LDO_B,
+		.enable_time		= 100,
+		.type			= REGULATOR_VOLTAGE,
+	},
+	.regA		= MAX77650_REG_CNFG_LDO_A,
+	.regB		= MAX77650_REG_CNFG_LDO_B,
+};
+
+static struct max77650_regulator_desc max77650_SBB0_desc = {
+	.desc = {
+		.name			= "sbb0",
+		.of_match		= of_match_ptr("sbb0"),
+		.regulators_node	= of_match_ptr("regulators"),
+		.supply_name		= "in-sbb0",
+		.id			= MAX77650_REGULATOR_ID_SBB0,
+		.ops			= &max77650_regulator_SBB_ops,
+		.min_uV			= 800000,
+		.uV_step		= 25000,
+		.n_voltages		= 64,
+		.vsel_mask		= MAX77650_REGULATOR_V_SBB_MASK,
+		.vsel_reg		= MAX77650_REG_CNFG_SBB0_A,
+		.active_discharge_off	= MAX77650_REGULATOR_AD_DISABLED,
+		.active_discharge_on	= MAX77650_REGULATOR_AD_ENABLED,
+		.active_discharge_mask	= MAX77650_REGULATOR_AD_MASK,
+		.active_discharge_reg	= MAX77650_REG_CNFG_SBB0_B,
+		.enable_time		= 100,
+		.type			= REGULATOR_VOLTAGE,
+	},
+	.regA		= MAX77650_REG_CNFG_SBB0_A,
+	.regB		= MAX77650_REG_CNFG_SBB0_B,
+};
+
+static struct max77650_regulator_desc max77650_SBB1_desc = {
+	.desc = {
+		.name			= "sbb1",
+		.of_match		= of_match_ptr("sbb1"),
+		.regulators_node	= of_match_ptr("regulators"),
+		.supply_name		= "in-sbb1",
+		.id			= MAX77650_REGULATOR_ID_SBB1,
+		.ops			= &max77650_regulator_SBB_ops,
+		.min_uV			= 800000,
+		.uV_step		= 12500,
+		.n_voltages		= 64,
+		.vsel_mask		= MAX77650_REGULATOR_V_SBB_MASK,
+		.vsel_reg		= MAX77650_REG_CNFG_SBB1_A,
+		.active_discharge_off	= MAX77650_REGULATOR_AD_DISABLED,
+		.active_discharge_on	= MAX77650_REGULATOR_AD_ENABLED,
+		.active_discharge_mask	= MAX77650_REGULATOR_AD_MASK,
+		.active_discharge_reg	= MAX77650_REG_CNFG_SBB1_B,
+		.enable_time		= 100,
+		.type			= REGULATOR_VOLTAGE,
+	},
+	.regA		= MAX77650_REG_CNFG_SBB1_A,
+	.regB		= MAX77650_REG_CNFG_SBB1_B,
+};
+
+static struct max77650_regulator_desc max77651_SBB1_desc = {
+	.desc = {
+		.name			= "sbb1",
+		.of_match		= of_match_ptr("sbb1"),
+		.regulators_node	= of_match_ptr("regulators"),
+		.supply_name		= "in-sbb1",
+		.id			= MAX77650_REGULATOR_ID_SBB1,
+		.ops			= &max77651_SBB1_regulator_ops,
+		.volt_table		= max77651_sbb1_regulator_volt_table,
+		.n_voltages = ARRAY_SIZE(max77651_sbb1_regulator_volt_table),
+		.vsel_mask		= MAX77650_REGULATOR_V_SBB_MASK,
+		.vsel_reg		= MAX77650_REG_CNFG_SBB1_A,
+		.active_discharge_off	= MAX77650_REGULATOR_AD_DISABLED,
+		.active_discharge_on	= MAX77650_REGULATOR_AD_ENABLED,
+		.active_discharge_mask	= MAX77650_REGULATOR_AD_MASK,
+		.active_discharge_reg	= MAX77650_REG_CNFG_SBB1_B,
+		.enable_time		= 100,
+		.type			= REGULATOR_VOLTAGE,
+	},
+	.regA		= MAX77650_REG_CNFG_SBB1_A,
+	.regB		= MAX77650_REG_CNFG_SBB1_B,
+};
+
+static struct max77650_regulator_desc max77650_SBB2_desc = {
+	.desc = {
+		.name			= "sbb2",
+		.of_match		= of_match_ptr("sbb2"),
+		.regulators_node	= of_match_ptr("regulators"),
+		.supply_name		= "in-sbb0",
+		.id			= MAX77650_REGULATOR_ID_SBB2,
+		.ops			= &max77650_regulator_SBB_ops,
+		.min_uV			= 800000,
+		.uV_step		= 50000,
+		.n_voltages		= 64,
+		.vsel_mask		= MAX77650_REGULATOR_V_SBB_MASK,
+		.vsel_reg		= MAX77650_REG_CNFG_SBB2_A,
+		.active_discharge_off	= MAX77650_REGULATOR_AD_DISABLED,
+		.active_discharge_on	= MAX77650_REGULATOR_AD_ENABLED,
+		.active_discharge_mask	= MAX77650_REGULATOR_AD_MASK,
+		.active_discharge_reg	= MAX77650_REG_CNFG_SBB2_B,
+		.enable_time		= 100,
+		.type			= REGULATOR_VOLTAGE,
+	},
+	.regA		= MAX77650_REG_CNFG_SBB2_A,
+	.regB		= MAX77650_REG_CNFG_SBB2_B,
+};
+
+static struct max77650_regulator_desc max77651_SBB2_desc = {
+	.desc = {
+		.name			= "sbb2",
+		.of_match		= of_match_ptr("sbb2"),
+		.regulators_node	= of_match_ptr("regulators"),
+		.supply_name		= "in-sbb0",
+		.id			= MAX77650_REGULATOR_ID_SBB2,
+		.ops			= &max77650_regulator_SBB_ops,
+		.min_uV			= 2400000,
+		.uV_step		= 50000,
+		.n_voltages		= 64,
+		.vsel_mask		= MAX77650_REGULATOR_V_SBB_MASK,
+		.vsel_reg		= MAX77650_REG_CNFG_SBB2_A,
+		.active_discharge_off	= MAX77650_REGULATOR_AD_DISABLED,
+		.active_discharge_on	= MAX77650_REGULATOR_AD_ENABLED,
+		.active_discharge_mask	= MAX77650_REGULATOR_AD_MASK,
+		.active_discharge_reg	= MAX77650_REG_CNFG_SBB2_B,
+		.enable_time		= 100,
+		.type			= REGULATOR_VOLTAGE,
+	},
+	.regA		= MAX77650_REG_CNFG_SBB2_A,
+	.regB		= MAX77650_REG_CNFG_SBB2_B,
+};
+
+static int max77650_regulator_probe(struct platform_device *pdev)
+{
+	struct max77650_regulator_desc **rdescs;
+	struct max77650_regulator_desc *rdesc;
+	struct regulator_config config = { };
+	struct device *dev, *parent;
+	struct regulator_dev *rdev;
+	struct regmap *map;
+	unsigned int val;
+	int i, rv;
+
+	dev = &pdev->dev;
+	parent = dev->parent;
+
+	if (!dev->of_node)
+		dev->of_node = parent->of_node;
+
+	rdescs = devm_kcalloc(dev, MAX77650_REGULATOR_NUM_REGULATORS,
+			      sizeof(*rdescs), GFP_KERNEL);
+	if (!rdescs)
+		return -ENOMEM;
+
+	map = dev_get_regmap(parent, NULL);
+	if (!map)
+		return -ENODEV;
+
+	rv = regmap_read(map, MAX77650_REG_CID, &val);
+	if (rv)
+		return rv;
+
+	rdescs[MAX77650_REGULATOR_ID_LDO] = &max77650_LDO_desc;
+	rdescs[MAX77650_REGULATOR_ID_SBB0] = &max77650_SBB0_desc;
+
+	switch (MAX77650_CID_BITS(val)) {
+	case MAX77650_CID_77650A:
+	case MAX77650_CID_77650C:
+		rdescs[MAX77650_REGULATOR_ID_SBB1] = &max77650_SBB1_desc;
+		rdescs[MAX77650_REGULATOR_ID_SBB2] = &max77650_SBB2_desc;
+		break;
+	case MAX77650_CID_77651A:
+	case MAX77650_CID_77651B:
+		rdescs[MAX77650_REGULATOR_ID_SBB1] = &max77651_SBB1_desc;
+		rdescs[MAX77650_REGULATOR_ID_SBB2] = &max77651_SBB2_desc;
+		break;
+	default:
+		return -ENODEV;
+	}
+
+	config.dev = parent;
+
+	for (i = 0; i < MAX77650_REGULATOR_NUM_REGULATORS; i++) {
+		rdesc = rdescs[i];
+		config.driver_data = rdesc;
+
+		rdev = devm_regulator_register(dev, &rdesc->desc, &config);
+		if (IS_ERR(rdev))
+			return PTR_ERR(rdev);
+	}
+
+	return 0;
+}
+
+static struct platform_driver max77650_regulator_driver = {
+	.driver = {
+		.name = "max77650-regulator",
+	},
+	.probe = max77650_regulator_probe,
+};
+module_platform_driver(max77650_regulator_driver);
+
+MODULE_DESCRIPTION("MAXIM 77650/77651 regulator driver");
+MODULE_AUTHOR("Bartosz Golaszewski <bgolaszewski@baylibre.com>");
+MODULE_LICENSE("GPL v2");
-- 
2.20.1

[PATCH v2 09/13] power: supply: max77650: add support for battery charger

[Bartosz Golaszewski]

From: Bartosz Golaszewski <bgolaszewski@baylibre.com>

Add basic support for the battery charger for max77650 PMIC.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
---
 drivers/power/supply/Kconfig            |   7 +
 drivers/power/supply/Makefile           |   1 +
 drivers/power/supply/max77650-charger.c | 355 ++++++++++++++++++++++++
 3 files changed, 363 insertions(+)
 create mode 100644 drivers/power/supply/max77650-charger.c

diff --git a/drivers/power/supply/Kconfig b/drivers/power/supply/Kconfig
index e901b9879e7e..0230c96fa94d 100644
--- a/drivers/power/supply/Kconfig
+++ b/drivers/power/supply/Kconfig
@@ -499,6 +499,13 @@ config CHARGER_DETECTOR_MAX14656
 	  Revision 1.2 and can be found e.g. in Kindle 4/5th generation
 	  readers and certain LG devices.
 
+config CHARGER_MAX77650
+	tristate "Maxim MAX77650 battery charger driver"
+	depends on MFD_MAX77650
+	help
+	  Say Y to enable support for the battery charger control of MAX77650
+	  PMICs.
+
 config CHARGER_MAX77693
 	tristate "Maxim MAX77693 battery charger driver"
 	depends on MFD_MAX77693
diff --git a/drivers/power/supply/Makefile b/drivers/power/supply/Makefile
index b731c2a9b695..b73eb8c5c1a9 100644
--- a/drivers/power/supply/Makefile
+++ b/drivers/power/supply/Makefile
@@ -70,6 +70,7 @@ obj-$(CONFIG_CHARGER_MANAGER)	+= charger-manager.o
 obj-$(CONFIG_CHARGER_LTC3651)	+= ltc3651-charger.o
 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-$(CONFIG_CHARGER_MAX8997)	+= max8997_charger.o
 obj-$(CONFIG_CHARGER_MAX8998)	+= max8998_charger.o
diff --git a/drivers/power/supply/max77650-charger.c b/drivers/power/supply/max77650-charger.c
new file mode 100644
index 000000000000..7055c9b5ee24
--- /dev/null
+++ b/drivers/power/supply/max77650-charger.c
@@ -0,0 +1,355 @@
+// SPDX-License-Identifier: GPL-2.0
+//
+// Copyright (C) 2018 BayLibre SAS
+// Author: Bartosz Golaszewski <bgolaszewski@baylibre.com>
+//
+// Battery charger driver for MAXIM 77650/77651 charger/power-supply.
+
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/mfd/max77650.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/power_supply.h>
+#include <linux/regmap.h>
+
+#define MAX77650_CHARGER_ENABLED		BIT(0)
+#define MAX77650_CHARGER_DISABLED		0x00
+#define MAX77650_CHARGER_CHG_EN_MASK		BIT(0)
+
+#define MAX77650_CHARGER_CHG_DTLS_MASK		GENMASK(7, 4)
+#define MAX77650_CHARGER_CHG_DTLS_BITS(_reg) \
+		(((_reg) & MAX77650_CHARGER_CHG_DTLS_MASK) >> 4)
+
+#define MAX77650_CHARGER_CHG_OFF		0x00
+#define MAX77650_CHARGER_CHG_PREQ		0x01
+#define MAX77650_CHARGER_CHG_ON_CURR		0x02
+#define MAX77650_CHARGER_CHG_ON_JCURR		0x03
+#define MAX77650_CHARGER_CHG_ON_VOLT		0x04
+#define MAX77650_CHARGER_CHG_ON_JVOLT		0x05
+#define MAX77650_CHARGER_CHG_ON_TOPOFF		0x06
+#define MAX77650_CHARGER_CHG_ON_JTOPOFF		0x07
+#define MAX77650_CHARGER_CHG_DONE		0x08
+#define MAX77650_CHARGER_CHG_JDONE		0x09
+#define MAX77650_CHARGER_CHG_SUSP_PF		0x0a
+#define MAX77650_CHARGER_CHG_SUSP_FCF		0x0b
+#define MAX77650_CHARGER_CHG_SUSP_BTF		0x0c
+
+#define MAX77650_CHARGER_CHGIN_DTLS_MASK	GENMASK(3, 2)
+#define MAX77650_CHARGER_CHGIN_DTLS_BITS(_reg) \
+		(((_reg) & MAX77650_CHARGER_CHGIN_DTLS_MASK) >> 2)
+
+#define MAX77650_CHARGER_CHGIN_UVL		0x00
+#define MAX77650_CHARGER_CHGIN_OVL		0x01
+#define MAX77650_CHARGER_CHGIN_OKAY		0x11
+
+#define MAX77650_CHARGER_CHG_MASK	BIT(1)
+#define MAX77650_CHARGER_CHG_CHARGING(_reg) \
+		(((_reg) & MAX77650_CHARGER_CHG_MASK) > 1)
+
+#define MAX77650_CHARGER_VCHGIN_MIN_MASK	0xc0
+#define MAX77650_CHARGER_VCHGIN_MIN_SHIFT(_val)	((_val) << 5)
+
+#define MAX77650_CHARGER_ICHGIN_LIM_MASK	0x1c
+#define MAX77650_CHARGER_ICHGIN_LIM_SHIFT(_val)	((_val) << 2)
+
+struct max77650_charger_data {
+	struct regmap *map;
+	struct device *dev;
+};
+
+static enum power_supply_property max77650_charger_properties[] = {
+	POWER_SUPPLY_PROP_STATUS,
+	POWER_SUPPLY_PROP_ONLINE,
+	POWER_SUPPLY_PROP_CHARGE_TYPE
+};
+
+static const unsigned int max77650_charger_vchgin_min_table[] = {
+	4000000, 4100000, 4200000, 4300000, 4400000, 4500000, 4600000, 4700000
+};
+
+static const unsigned int max77650_charger_ichgin_lim_table[] = {
+	95000, 190000, 285000, 380000, 475000
+};
+
+static int max77650_charger_set_vchgin_min(struct max77650_charger_data *chg,
+					   unsigned int val)
+{
+	int i, rv;
+
+	for (i = 0; i < ARRAY_SIZE(max77650_charger_vchgin_min_table); i++) {
+		if (val == max77650_charger_vchgin_min_table[i]) {
+			rv = regmap_update_bits(chg->map,
+					MAX77650_REG_CNFG_CHG_B,
+					MAX77650_CHARGER_VCHGIN_MIN_MASK,
+					MAX77650_CHARGER_VCHGIN_MIN_SHIFT(i));
+			if (rv)
+				return rv;
+
+			return 0;
+		}
+	}
+
+	return -EINVAL;
+}
+
+static int max77650_charger_set_ichgin_lim(struct max77650_charger_data *chg,
+					   unsigned int val)
+{
+	int i, rv;
+
+	for (i = 0; i < ARRAY_SIZE(max77650_charger_ichgin_lim_table); i++) {
+		if (val == max77650_charger_ichgin_lim_table[i]) {
+			rv = regmap_update_bits(chg->map,
+					MAX77650_REG_CNFG_CHG_B,
+					MAX77650_CHARGER_ICHGIN_LIM_MASK,
+					MAX77650_CHARGER_ICHGIN_LIM_SHIFT(i));
+			if (rv)
+				return rv;
+
+			return 0;
+		}
+	}
+
+	return -EINVAL;
+}
+
+static void max77650_charger_enable(struct max77650_charger_data *chg)
+{
+	int rv;
+
+	rv = regmap_update_bits(chg->map,
+				MAX77650_REG_CNFG_CHG_B,
+				MAX77650_CHARGER_CHG_EN_MASK,
+				MAX77650_CHARGER_ENABLED);
+	if (rv)
+		dev_err(chg->dev, "unable to enable the charger: %d\n", rv);
+}
+
+static void max77650_charger_disable(struct max77650_charger_data *chg)
+{
+	int rv;
+
+	rv = regmap_update_bits(chg->map,
+				MAX77650_REG_CNFG_CHG_B,
+				MAX77650_CHARGER_CHG_EN_MASK,
+				MAX77650_CHARGER_DISABLED);
+	if (rv)
+		dev_err(chg->dev, "unable to disable the charger: %d\n", rv);
+}
+
+static irqreturn_t max77650_charger_check_status(int irq, void *data)
+{
+	struct max77650_charger_data *chg = data;
+	int rv, reg;
+
+	rv = regmap_read(chg->map, MAX77650_REG_STAT_CHG_B, &reg);
+	if (rv) {
+		dev_err(chg->dev,
+			"unable to read the charger status: %d\n", rv);
+		return IRQ_HANDLED;
+	}
+
+	switch (MAX77650_CHARGER_CHGIN_DTLS_BITS(reg)) {
+	case MAX77650_CHARGER_CHGIN_UVL:
+		dev_err(chg->dev, "undervoltage lockout detected, disabling charger\n");
+		max77650_charger_disable(chg);
+		break;
+	case MAX77650_CHARGER_CHGIN_OVL:
+		dev_err(chg->dev, "overvoltage lockout detected, disabling charger\n");
+		max77650_charger_disable(chg);
+		break;
+	case MAX77650_CHARGER_CHGIN_OKAY:
+		max77650_charger_enable(chg);
+		break;
+	default:
+		/* May be 0x10 - debouncing */
+		break;
+	}
+
+	return IRQ_HANDLED;
+}
+
+static int max77650_charger_get_property(struct power_supply *psy,
+					 enum power_supply_property psp,
+					 union power_supply_propval *val)
+{
+	struct max77650_charger_data *chg = power_supply_get_drvdata(psy);
+	int rv, reg;
+
+	switch (psp) {
+	case POWER_SUPPLY_PROP_STATUS:
+		rv = regmap_read(chg->map, MAX77650_REG_STAT_CHG_B, &reg);
+		if (rv)
+			return rv;
+
+		if (MAX77650_CHARGER_CHG_CHARGING(reg)) {
+			val->intval = POWER_SUPPLY_STATUS_CHARGING;
+			break;
+		}
+
+		switch (MAX77650_CHARGER_CHG_DTLS_BITS(reg)) {
+		case MAX77650_CHARGER_CHG_OFF:
+		case MAX77650_CHARGER_CHG_SUSP_PF:
+		case MAX77650_CHARGER_CHG_SUSP_FCF:
+		case MAX77650_CHARGER_CHG_SUSP_BTF:
+			val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
+			break;
+		case MAX77650_CHARGER_CHG_PREQ:
+		case MAX77650_CHARGER_CHG_ON_CURR:
+		case MAX77650_CHARGER_CHG_ON_JCURR:
+		case MAX77650_CHARGER_CHG_ON_VOLT:
+		case MAX77650_CHARGER_CHG_ON_JVOLT:
+		case MAX77650_CHARGER_CHG_ON_TOPOFF:
+		case MAX77650_CHARGER_CHG_ON_JTOPOFF:
+			val->intval = POWER_SUPPLY_STATUS_CHARGING;
+			break;
+		case MAX77650_CHARGER_CHG_DONE:
+			val->intval = POWER_SUPPLY_STATUS_FULL;
+			break;
+		default:
+			val->intval = POWER_SUPPLY_STATUS_UNKNOWN;
+		}
+		break;
+	case POWER_SUPPLY_PROP_ONLINE:
+		rv = regmap_read(chg->map, MAX77650_REG_STAT_CHG_B, &reg);
+		if (rv)
+			return rv;
+
+		val->intval = MAX77650_CHARGER_CHG_CHARGING(reg);
+		break;
+	case POWER_SUPPLY_PROP_CHARGE_TYPE:
+		rv = regmap_read(chg->map, MAX77650_REG_STAT_CHG_B, &reg);
+		if (rv)
+			return rv;
+
+		if (!MAX77650_CHARGER_CHG_CHARGING(reg)) {
+			val->intval = POWER_SUPPLY_CHARGE_TYPE_NONE;
+			break;
+		}
+
+		switch (MAX77650_CHARGER_CHG_DTLS_BITS(reg)) {
+		case MAX77650_CHARGER_CHG_PREQ:
+		case MAX77650_CHARGER_CHG_ON_CURR:
+		case MAX77650_CHARGER_CHG_ON_JCURR:
+		case MAX77650_CHARGER_CHG_ON_VOLT:
+		case MAX77650_CHARGER_CHG_ON_JVOLT:
+			val->intval = POWER_SUPPLY_CHARGE_TYPE_FAST;
+			break;
+		case MAX77650_CHARGER_CHG_ON_TOPOFF:
+		case MAX77650_CHARGER_CHG_ON_JTOPOFF:
+			val->intval = POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
+			break;
+		default:
+			val->intval = POWER_SUPPLY_CHARGE_TYPE_UNKNOWN;
+		}
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static const struct power_supply_desc max77650_battery_desc = {
+	.name		= "max77650",
+	.type		= POWER_SUPPLY_TYPE_USB,
+	.get_property	= max77650_charger_get_property,
+	.properties	= max77650_charger_properties,
+	.num_properties	= ARRAY_SIZE(max77650_charger_properties),
+};
+
+static int max77650_charger_probe(struct platform_device *pdev)
+{
+	struct power_supply_config pscfg = {};
+	struct max77650_charger_data *chg;
+	struct power_supply *battery;
+	struct device *dev, *parent;
+	int rv, chg_irq, chgin_irq;
+	unsigned int prop;
+
+	dev = &pdev->dev;
+	parent = dev->parent;
+
+	chg = devm_kzalloc(dev, sizeof(*chg), GFP_KERNEL);
+	if (!chg)
+		return -ENOMEM;
+
+	platform_set_drvdata(pdev, chg);
+
+	chg->map = dev_get_regmap(parent, NULL);
+	if (!chg->map)
+		return -ENODEV;
+
+	chg->dev = dev;
+
+	pscfg.of_node = dev->of_node;
+	pscfg.drv_data = chg;
+
+	chg_irq = platform_get_irq_byname(pdev, "CHG");
+	if (chg_irq < 0)
+		return chg_irq;
+
+	chgin_irq = platform_get_irq_byname(pdev, "CHGIN");
+	if (chgin_irq < 0)
+		return chgin_irq;
+
+	rv = devm_request_any_context_irq(dev, chg_irq,
+					  max77650_charger_check_status,
+					  IRQF_ONESHOT, "chg", chg);
+	if (rv < 0)
+		return rv;
+
+	rv = devm_request_any_context_irq(dev, chgin_irq,
+					  max77650_charger_check_status,
+					  IRQF_ONESHOT, "chgin", chg);
+	if (rv < 0)
+		return rv;
+
+	battery = devm_power_supply_register(dev,
+					     &max77650_battery_desc, &pscfg);
+	if (IS_ERR(battery))
+		return PTR_ERR(battery);
+
+	rv = of_property_read_u32(dev->of_node, "maxim,vchgin-min", &prop);
+	if (rv == 0) {
+		rv = max77650_charger_set_vchgin_min(chg, prop);
+		if (rv)
+			return rv;
+	}
+
+	rv = of_property_read_u32(dev->of_node, "maxim,ichgin-lim", &prop);
+	if (rv == 0) {
+		rv = max77650_charger_set_ichgin_lim(chg, prop);
+		if (rv)
+			return rv;
+	}
+
+	return regmap_update_bits(chg->map,
+				  MAX77650_REG_CNFG_CHG_B,
+				  MAX77650_CHARGER_CHG_EN_MASK,
+				  MAX77650_CHARGER_ENABLED);
+}
+
+static int max77650_charger_remove(struct platform_device *pdev)
+{
+	struct max77650_charger_data *chg = platform_get_drvdata(pdev);
+
+	return regmap_update_bits(chg->map,
+				  MAX77650_REG_CNFG_CHG_B,
+				  MAX77650_CHARGER_CHG_EN_MASK,
+				  MAX77650_CHARGER_DISABLED);
+}
+
+static struct platform_driver max77650_charger_driver = {
+	.driver = {
+		.name = "max77650-charger",
+	},
+	.probe = max77650_charger_probe,
+	.remove = max77650_charger_remove,
+};
+module_platform_driver(max77650_charger_driver);
+
+MODULE_DESCRIPTION("MAXIM 77650/77651 charger driver");
+MODULE_AUTHOR("Bartosz Golaszewski <bgolaszewski@baylibre.com>");
+MODULE_LICENSE("GPL v2");
-- 
2.20.1

[PATCH v2 10/13] gpio: max77650: add GPIO support

[Bartosz Golaszewski]

From: Bartosz Golaszewski <bgolaszewski@baylibre.com>

Add GPIO support for max77650 mfd device. This PMIC exposes a single
GPIO line.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
---
 drivers/gpio/Kconfig         |   7 ++
 drivers/gpio/Makefile        |   1 +
 drivers/gpio/gpio-max77650.c | 189 +++++++++++++++++++++++++++++++++++
 3 files changed, 197 insertions(+)
 create mode 100644 drivers/gpio/gpio-max77650.c

diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index b5a2845347ec..fb297fe5bfec 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -1095,6 +1095,13 @@ config GPIO_MAX77620
 	  driver also provides interrupt support for each of the gpios.
 	  Say yes here to enable the max77620 to be used as gpio controller.
 
+config GPIO_MAX77650
+	tristate "Maxim MAX77650/77651 GPIO support"
+	depends on MFD_MAX77650
+	help
+	  GPIO driver for MAX77650/77651 PMIC from Maxim Semiconductor.
+	  These chips have a single pin that can be configured as GPIO.
+
 config GPIO_MSIC
 	bool "Intel MSIC mixed signal gpio support"
 	depends on (X86 || COMPILE_TEST) && MFD_INTEL_MSIC
diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile
index 37628f8dbf70..8bdad50db822 100644
--- a/drivers/gpio/Makefile
+++ b/drivers/gpio/Makefile
@@ -78,6 +78,7 @@ obj-$(CONFIG_GPIO_MAX7300)	+= gpio-max7300.o
 obj-$(CONFIG_GPIO_MAX7301)	+= gpio-max7301.o
 obj-$(CONFIG_GPIO_MAX732X)	+= gpio-max732x.o
 obj-$(CONFIG_GPIO_MAX77620)	+= gpio-max77620.o
+obj-$(CONFIG_GPIO_MAX77650)	+= gpio-max77650.o
 obj-$(CONFIG_GPIO_MB86S7X)	+= gpio-mb86s7x.o
 obj-$(CONFIG_GPIO_MENZ127)	+= gpio-menz127.o
 obj-$(CONFIG_GPIO_MERRIFIELD)	+= gpio-merrifield.o
diff --git a/drivers/gpio/gpio-max77650.c b/drivers/gpio/gpio-max77650.c
new file mode 100644
index 000000000000..8382dd85c548
--- /dev/null
+++ b/drivers/gpio/gpio-max77650.c
@@ -0,0 +1,189 @@
+// SPDX-License-Identifier: GPL-2.0
+//
+// Copyright (C) 2018 BayLibre SAS
+// Author: Bartosz Golaszewski <bgolaszewski@baylibre.com>
+//
+// GPIO driver for MAXIM 77650/77651 charger/power-supply.
+
+#include <linux/gpio/driver.h>
+#include <linux/i2c.h>
+#include <linux/mfd/max77650.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+
+#define MAX77650_GPIO_DIR_MASK		BIT(0)
+#define MAX77650_GPIO_INVAL_MASK	BIT(1)
+#define MAX77650_GPIO_DRV_MASK		BIT(2)
+#define MAX77650_GPIO_OUTVAL_MASK	BIT(3)
+#define MAX77650_GPIO_DEBOUNCE_MASK	BIT(4)
+
+#define MAX77650_GPIO_DIR_OUT		0x00
+#define MAX77650_GPIO_DIR_IN		BIT(0)
+#define MAX77650_GPIO_OUT_LOW		0x00
+#define MAX77650_GPIO_OUT_HIGH		BIT(3)
+#define MAX77650_GPIO_DRV_OPEN_DRAIN	0x00
+#define MAX77650_GPIO_DRV_PUSH_PULL	BIT(2)
+#define MAX77650_GPIO_DEBOUNCE		BIT(4)
+
+#define MAX77650_GPIO_DIR_BITS(_reg) \
+		((_reg) & MAX77650_GPIO_DIR_MASK)
+#define MAX77650_GPIO_INVAL_BITS(_reg) \
+		(((_reg) & MAX77650_GPIO_INVAL_MASK) >> 1)
+
+struct max77650_gpio_chip {
+	struct regmap *map;
+	struct gpio_chip gc;
+};
+
+static int max77650_gpio_direction_input(struct gpio_chip *gc,
+					 unsigned int offset)
+{
+	struct max77650_gpio_chip *chip = gpiochip_get_data(gc);
+
+	return regmap_update_bits(chip->map,
+				  MAX77650_REG_CNFG_GPIO,
+				  MAX77650_GPIO_DIR_MASK,
+				  MAX77650_GPIO_DIR_IN);
+}
+
+static int max77650_gpio_direction_output(struct gpio_chip *gc,
+					  unsigned int offset, int value)
+{
+	struct max77650_gpio_chip *chip = gpiochip_get_data(gc);
+	int mask, regval;
+
+	mask = MAX77650_GPIO_DIR_MASK | MAX77650_GPIO_OUTVAL_MASK;
+	regval = value ? MAX77650_GPIO_OUT_HIGH : MAX77650_GPIO_OUT_LOW;
+	regval |= MAX77650_GPIO_DIR_OUT;
+
+	return regmap_update_bits(chip->map,
+				  MAX77650_REG_CNFG_GPIO, mask, regval);
+}
+
+static void max77650_gpio_set_value(struct gpio_chip *gc,
+				    unsigned int offset, int value)
+{
+	struct max77650_gpio_chip *chip = gpiochip_get_data(gc);
+	int rv, regval;
+
+	regval = value ? MAX77650_GPIO_OUT_HIGH : MAX77650_GPIO_OUT_LOW;
+
+	rv = regmap_update_bits(chip->map, MAX77650_REG_CNFG_GPIO,
+				MAX77650_GPIO_OUTVAL_MASK, regval);
+	if (rv)
+		dev_err(gc->parent, "cannot set GPIO value: %d\n", rv);
+}
+
+static int max77650_gpio_get_value(struct gpio_chip *gc,
+				   unsigned int offset)
+{
+	struct max77650_gpio_chip *chip = gpiochip_get_data(gc);
+	unsigned int val;
+	int rv;
+
+	rv = regmap_read(chip->map, MAX77650_REG_CNFG_GPIO, &val);
+	if (rv)
+		return rv;
+
+	return MAX77650_GPIO_INVAL_BITS(val);
+}
+
+static int max77650_gpio_get_direction(struct gpio_chip *gc,
+				       unsigned int offset)
+{
+	struct max77650_gpio_chip *chip = gpiochip_get_data(gc);
+	unsigned int val;
+	int rv;
+
+	rv = regmap_read(chip->map, MAX77650_REG_CNFG_GPIO, &val);
+	if (rv)
+		return rv;
+
+	return MAX77650_GPIO_DIR_BITS(val);
+}
+
+static int max77650_gpio_set_config(struct gpio_chip *gc,
+				    unsigned int offset, unsigned long cfg)
+{
+	struct max77650_gpio_chip *chip = gpiochip_get_data(gc);
+
+	switch (pinconf_to_config_param(cfg)) {
+	case PIN_CONFIG_DRIVE_OPEN_DRAIN:
+		return regmap_update_bits(chip->map,
+					  MAX77650_REG_CNFG_GPIO,
+					  MAX77650_GPIO_DRV_MASK,
+					  MAX77650_GPIO_DRV_OPEN_DRAIN);
+	case PIN_CONFIG_DRIVE_PUSH_PULL:
+		return regmap_update_bits(chip->map,
+					  MAX77650_REG_CNFG_GPIO,
+					  MAX77650_GPIO_DRV_MASK,
+					  MAX77650_GPIO_DRV_PUSH_PULL);
+	case PIN_CONFIG_INPUT_DEBOUNCE:
+		return regmap_update_bits(chip->map,
+					  MAX77650_REG_CNFG_GPIO,
+					  MAX77650_GPIO_DEBOUNCE_MASK,
+					  MAX77650_GPIO_DEBOUNCE);
+	default:
+		return -ENOTSUPP;
+	}
+}
+
+static int max77650_gpio_to_irq(struct gpio_chip *gc, unsigned int offset)
+{
+	/*
+	 * TODO Add interrupt support.
+	 *
+	 * We first need to properly support hierarchical irqs in gpiolib
+	 * and regmap irq_chip.
+	 */
+	return -EOPNOTSUPP;
+}
+
+static int max77650_gpio_probe(struct platform_device *pdev)
+{
+	struct max77650_gpio_chip *chip;
+	struct device *dev, *parent;
+	struct i2c_client *i2c;
+
+	dev = &pdev->dev;
+	parent = dev->parent;
+	i2c = to_i2c_client(parent);
+
+	chip = devm_kzalloc(dev, sizeof(*chip), GFP_KERNEL);
+	if (!chip)
+		return -ENOMEM;
+
+	chip->map = dev_get_regmap(parent, NULL);
+	if (!chip->map)
+		return -ENODEV;
+
+	chip->gc.base = -1;
+	chip->gc.ngpio = 1;
+	chip->gc.label = i2c->name;
+	chip->gc.parent = dev;
+	chip->gc.owner = THIS_MODULE;
+	chip->gc.can_sleep = true;
+
+	chip->gc.direction_input = max77650_gpio_direction_input;
+	chip->gc.direction_output = max77650_gpio_direction_output;
+	chip->gc.set = max77650_gpio_set_value;
+	chip->gc.get = max77650_gpio_get_value;
+	chip->gc.get_direction = max77650_gpio_get_direction;
+	chip->gc.set_config = max77650_gpio_set_config;
+	chip->gc.to_irq = max77650_gpio_to_irq;
+
+	return devm_gpiochip_add_data(dev, &chip->gc, chip);
+}
+
+static struct platform_driver max77650_gpio_driver = {
+	.driver = {
+		.name = "max77650-gpio",
+	},
+	.probe = max77650_gpio_probe,
+};
+module_platform_driver(max77650_gpio_driver);
+
+MODULE_DESCRIPTION("MAXIM 77650/77651 GPIO driver");
+MODULE_AUTHOR("Bartosz Golaszewski <bgolaszewski@baylibre.com>");
+MODULE_LICENSE("GPL v2");
-- 
2.20.1

[PATCH v2 11/13] leds: max77650: add LEDs support

[Bartosz Golaszewski]

From: Bartosz Golaszewski <bgolaszewski@baylibre.com>

This adds basic support for LEDs for the max77650 PMIC. The device has
three current sinks for driving LEDs.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
---
 drivers/leds/Kconfig         |   6 ++
 drivers/leds/Makefile        |   1 +
 drivers/leds/leds-max77650.c | 152 +++++++++++++++++++++++++++++++++++
 3 files changed, 159 insertions(+)
 create mode 100644 drivers/leds/leds-max77650.c

diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig
index a72f97fca57b..6e7a8f51eccc 100644
--- a/drivers/leds/Kconfig
+++ b/drivers/leds/Kconfig
@@ -608,6 +608,12 @@ config LEDS_TLC591XX
 	  This option enables support for Texas Instruments TLC59108
 	  and TLC59116 LED controllers.
 
+config LEDS_MAX77650
+	tristate "LED support for Maxim MAX77650 PMIC"
+	depends on MFD_MAX77650
+	help
+	  LEDs driver for MAX77650 family of PMICs from Maxim Integrated."
+
 config LEDS_MAX77693
 	tristate "LED support for MAX77693 Flash"
 	depends on LEDS_CLASS_FLASH
diff --git a/drivers/leds/Makefile b/drivers/leds/Makefile
index 4c1b0054f379..f48b2404dbb7 100644
--- a/drivers/leds/Makefile
+++ b/drivers/leds/Makefile
@@ -61,6 +61,7 @@ obj-$(CONFIG_LEDS_MC13783)		+= leds-mc13783.o
 obj-$(CONFIG_LEDS_NS2)			+= leds-ns2.o
 obj-$(CONFIG_LEDS_NETXBIG)		+= leds-netxbig.o
 obj-$(CONFIG_LEDS_ASIC3)		+= leds-asic3.o
+obj-$(CONFIG_LEDS_MAX77650)		+= leds-max77650.o
 obj-$(CONFIG_LEDS_MAX77693)		+= leds-max77693.o
 obj-$(CONFIG_LEDS_MAX8997)		+= leds-max8997.o
 obj-$(CONFIG_LEDS_LM355x)		+= leds-lm355x.o
diff --git a/drivers/leds/leds-max77650.c b/drivers/leds/leds-max77650.c
new file mode 100644
index 000000000000..e3a3c0e79b7a
--- /dev/null
+++ b/drivers/leds/leds-max77650.c
@@ -0,0 +1,152 @@
+// SPDX-License-Identifier: GPL-2.0
+//
+// Copyright (C) 2018 BayLibre SAS
+// Author: Bartosz Golaszewski <bgolaszewski@baylibre.com>
+//
+// LED driver for MAXIM 77650/77651 charger/power-supply.
+
+#include <linux/i2c.h>
+#include <linux/leds.h>
+#include <linux/mfd/max77650.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+
+#define MAX77650_NUM_LEDS		3
+
+#define MAX77650_LED_A_BASE		0x40
+#define MAX77650_LED_B_BASE		0x43
+
+#define MAX77650_LED_BR_MASK		GENMASK(4, 0)
+#define MAX77650_LED_EN_MASK		GENMASK(7, 6)
+
+/* Enable EN_LED_MSTR. */
+#define MAX77650_LED_TOP_DEFAULT	BIT(0)
+
+#define MAX77650_LED_ENABLE		GENMASK(7, 6)
+#define MAX77650_LED_DISABLE		0x00
+
+#define MAX77650_LED_A_DEFAULT		MAX77650_LED_DISABLE
+/* 100% on duty */
+#define MAX77650_LED_B_DEFAULT		GENMASK(3, 0)
+
+struct max77650_led {
+	struct led_classdev cdev;
+	struct regmap *map;
+	unsigned int regA;
+	unsigned int regB;
+};
+
+static struct max77650_led *max77650_to_led(struct led_classdev *cdev)
+{
+	return container_of(cdev, struct max77650_led, cdev);
+}
+
+static int max77650_led_brightness_set(struct led_classdev *cdev,
+				       enum led_brightness brightness)
+{
+	struct max77650_led *led = max77650_to_led(cdev);
+	int val, mask;
+
+	mask = MAX77650_LED_BR_MASK | MAX77650_LED_EN_MASK;
+
+	if (brightness == LED_OFF) {
+		val = MAX77650_LED_DISABLE;
+	} else {
+		val = MAX77650_LED_ENABLE;
+		/*
+		 * We can set the brightness with 5-bit resolution.
+		 *
+		 * For brightness == 1, the bits we're writing will be 0, but
+		 * since we keep LED_FS0 set to 12.8mA full-scale range, the
+		 * LED will be lit slightly.
+		 */
+		val |= brightness / 8;
+	}
+
+	return regmap_update_bits(led->map, led->regA, mask, val);
+}
+
+static int max77650_led_probe(struct platform_device *pdev)
+{
+	struct device_node *of_node, *child;
+	struct max77650_led *leds, *led;
+	struct device *parent;
+	struct device *dev;
+	struct regmap *map;
+	const char *label;
+	int rv, num_leds;
+	u32 reg;
+
+	dev = &pdev->dev;
+	parent = dev->parent;
+	of_node = dev->of_node;
+
+	if (!of_node)
+		return -ENODEV;
+
+	leds = devm_kcalloc(dev, sizeof(*leds), MAX77650_NUM_LEDS, GFP_KERNEL);
+	if (!leds)
+		return -ENOMEM;
+
+	map = dev_get_regmap(dev->parent, NULL);
+	if (!map)
+		return -ENODEV;
+
+	num_leds = of_get_child_count(of_node);
+	if (!num_leds || num_leds > MAX77650_NUM_LEDS)
+		return -ENODEV;
+
+	for_each_child_of_node(of_node, child) {
+		rv = of_property_read_u32(child, "reg", &reg);
+		if (rv || reg >= MAX77650_NUM_LEDS)
+			return -EINVAL;
+
+		led = &leds[reg];
+		led->map = map;
+		led->regA = MAX77650_LED_A_BASE + reg;
+		led->regB = MAX77650_LED_B_BASE + reg;
+		led->cdev.brightness_set_blocking = max77650_led_brightness_set;
+
+		label = of_get_property(child, "label", NULL);
+		if (!label) {
+			led->cdev.name = "max77650::";
+		} else {
+			led->cdev.name = devm_kasprintf(dev, GFP_KERNEL,
+							"max77650:%s", label);
+			if (!led->cdev.name)
+				return -ENOMEM;
+		}
+
+		of_property_read_string(child, "linux,default-trigger",
+					&led->cdev.default_trigger);
+
+		rv = devm_of_led_classdev_register(dev, child, &led->cdev);
+		if (rv)
+			return rv;
+
+		rv = regmap_write(map, led->regA, MAX77650_LED_A_DEFAULT);
+		if (rv)
+			return rv;
+
+		rv = regmap_write(map, led->regB, MAX77650_LED_B_DEFAULT);
+		if (rv)
+			return rv;
+	}
+
+	return regmap_write(map,
+			    MAX77650_REG_CNFG_LED_TOP,
+			    MAX77650_LED_TOP_DEFAULT);
+}
+
+static struct platform_driver max77650_led_driver = {
+	.driver = {
+		.name = "max77650-led",
+	},
+	.probe = max77650_led_probe,
+};
+module_platform_driver(max77650_led_driver);
+
+MODULE_DESCRIPTION("MAXIM 77650/77651 LED driver");
+MODULE_AUTHOR("Bartosz Golaszewski <bgolaszewski@baylibre.com>");
+MODULE_LICENSE("GPL v2");
-- 
2.20.1

[PATCH v2 12/13] input: max77650: add onkey support

[Bartosz Golaszewski]

From: Bartosz Golaszewski <bgolaszewski@baylibre.com>

Add support for the push- and slide-button events for max77650.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
---
 drivers/input/misc/Kconfig          |   9 ++
 drivers/input/misc/Makefile         |   1 +
 drivers/input/misc/max77650-onkey.c | 127 ++++++++++++++++++++++++++++
 3 files changed, 137 insertions(+)
 create mode 100644 drivers/input/misc/max77650-onkey.c

diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig
index ca59a2be9bc5..bb9c45c1269e 100644
--- a/drivers/input/misc/Kconfig
+++ b/drivers/input/misc/Kconfig
@@ -180,6 +180,15 @@ config INPUT_M68K_BEEP
 	tristate "M68k Beeper support"
 	depends on M68K
 
+config INPUT_MAX77650_ONKEY
+	tristate "Maxim MAX77650 ONKEY support"
+	depends on MFD_MAX77650
+	help
+	  Support the ONKEY of the MAX77650 PMIC as an input device.
+
+	  To compile this driver as a module, choose M here: the module
+	  will be called max77650-onkey.
+
 config INPUT_MAX77693_HAPTIC
 	tristate "MAXIM MAX77693/MAX77843 haptic controller support"
 	depends on (MFD_MAX77693 || MFD_MAX77843) && PWM
diff --git a/drivers/input/misc/Makefile b/drivers/input/misc/Makefile
index 9d0f9d1ff68f..5bd53590ce60 100644
--- a/drivers/input/misc/Makefile
+++ b/drivers/input/misc/Makefile
@@ -43,6 +43,7 @@ obj-$(CONFIG_INPUT_IXP4XX_BEEPER)	+= ixp4xx-beeper.o
 obj-$(CONFIG_INPUT_KEYSPAN_REMOTE)	+= keyspan_remote.o
 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-$(CONFIG_INPUT_MAX8925_ONKEY)	+= max8925_onkey.o
 obj-$(CONFIG_INPUT_MAX8997_HAPTIC)	+= max8997_haptic.o
diff --git a/drivers/input/misc/max77650-onkey.c b/drivers/input/misc/max77650-onkey.c
new file mode 100644
index 000000000000..7fc3e9196abb
--- /dev/null
+++ b/drivers/input/misc/max77650-onkey.c
@@ -0,0 +1,127 @@
+// SPDX-License-Identifier: GPL-2.0
+//
+// Copyright (C) 2018 BayLibre SAS
+// Author: Bartosz Golaszewski <bgolaszewski@baylibre.com>
+//
+// ONKEY driver for MAXIM 77650/77651 charger/power-supply.
+
+#include <linux/i2c.h>
+#include <linux/input.h>
+#include <linux/interrupt.h>
+#include <linux/mfd/max77650.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+
+#define MAX77650_ONKEY_MODE_MASK	BIT(3)
+#define MAX77650_ONKEY_MODE_PUSH	0x00
+#define MAX77650_ONKEY_MODE_SLIDE	BIT(3)
+
+struct max77650_onkey {
+	struct input_dev *input;
+	unsigned int code;
+};
+
+static irqreturn_t max77650_onkey_falling(int irq, void *data)
+{
+	struct max77650_onkey *onkey = data;
+
+	input_report_key(onkey->input, onkey->code, 0);
+	input_sync(onkey->input);
+
+	return IRQ_HANDLED;
+}
+
+static irqreturn_t max77650_onkey_rising(int irq, void *data)
+{
+	struct max77650_onkey *onkey = data;
+
+	input_report_key(onkey->input, onkey->code, 1);
+	input_sync(onkey->input);
+
+	return IRQ_HANDLED;
+}
+
+static int max77650_onkey_probe(struct platform_device *pdev)
+{
+	int irq_r, irq_f, error, mode;
+	struct max77650_onkey *onkey;
+	struct device *dev, *parent;
+	const char *mode_prop;
+	struct regmap *map;
+
+	dev = &pdev->dev;
+	parent = dev->parent;
+
+	map = dev_get_regmap(parent, NULL);
+	if (!map)
+		return -ENODEV;
+
+	onkey = devm_kzalloc(dev, sizeof(*onkey), GFP_KERNEL);
+	if (!onkey)
+		return -ENOMEM;
+
+	error = device_property_read_u32(dev, "linux,code", &onkey->code);
+	if (error)
+		onkey->code = KEY_POWER;
+
+	error = device_property_read_string(dev,
+					    "maxim,onkey-mode", &mode_prop);
+	if (error)
+		mode_prop = "push";
+
+	if (strcmp(mode_prop, "push") == 0)
+		mode = MAX77650_ONKEY_MODE_PUSH;
+	else if (strcmp(mode_prop, "slide") == 0)
+		mode = MAX77650_ONKEY_MODE_SLIDE;
+	else
+		return -EINVAL;
+
+	error = regmap_update_bits(map, MAX77650_REG_CNFG_GLBL,
+				   MAX77650_ONKEY_MODE_MASK, mode);
+	if (error)
+		return error;
+
+	irq_f = platform_get_irq_byname(pdev, "nEN_F");
+	if (irq_f < 0)
+		return irq_f;
+
+	irq_r = platform_get_irq_byname(pdev, "nEN_R");
+	if (irq_r < 0)
+		return irq_r;
+
+	onkey->input = devm_input_allocate_device(dev);
+	if (!onkey->input)
+		return -ENOMEM;
+
+	onkey->input->name = "max77650_onkey";
+	onkey->input->phys = "max77650_onkey/input0";
+	onkey->input->id.bustype = BUS_I2C;
+	input_set_capability(onkey->input, EV_KEY, onkey->code);
+
+	error = devm_request_any_context_irq(dev, irq_f,
+					     max77650_onkey_falling,
+					     IRQF_ONESHOT, "onkey-down",
+					     onkey);
+	if (error < 0)
+		return error;
+
+	error = devm_request_any_context_irq(dev, irq_r, max77650_onkey_rising,
+					     IRQF_ONESHOT, "onkey-up", onkey);
+	if (error < 0)
+		return error;
+
+	return input_register_device(onkey->input);
+}
+
+static struct platform_driver max77650_onkey_driver = {
+	.driver = {
+		.name = "max77650-onkey",
+	},
+	.probe = max77650_onkey_probe,
+};
+module_platform_driver(max77650_onkey_driver);
+
+MODULE_DESCRIPTION("MAXIM 77650/77651 ONKEY driver");
+MODULE_AUTHOR("Bartosz Golaszewski <bgolaszewski@baylibre.com>");
+MODULE_LICENSE("GPL v2");
-- 
2.20.1

[PATCH v2 13/13] MAINTAINERS: add an entry for max77650 mfd driver

[Bartosz Golaszewski]

From: Bartosz Golaszewski <bgolaszewski@baylibre.com>

I plan on extending this set of drivers so add myself as maintainer.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
---
 MAINTAINERS | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/MAINTAINERS b/MAINTAINERS
index 9f64f8d3740e..d4032d94c275 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -9221,6 +9221,20 @@ S:	Maintained
 F:	Documentation/devicetree/bindings/sound/max9860.txt
 F:	sound/soc/codecs/max9860.*
 
+MAXIM MAX77650 PMIC MFD DRIVER
+M:	Bartosz Golaszewski <bgolaszewski@baylibre.com>
+L:	linux-kernel@vger.kernel.org
+S:	Maintained
+F:	Documentation/devicetree/bindings/*/*max77650.txt
+F:	Documentation/devicetree/bindings/*/max77650*.txt
+F:	include/linux/mfd/max77650.h
+F:	drivers/mfd/max77650.c
+F:	drivers/regulator/max77650-regulator.c
+F:	drivers/power/supply/max77650-charger.c
+F:	drivers/input/misc/max77650-onkey.c
+F:	drivers/leds/leds-max77650.c
+F:	drivers/gpio/gpio-max77650.c
+
 MAXIM MAX77802 PMIC REGULATOR DEVICE DRIVER
 M:	Javier Martinez Canillas <javier@dowhile0.org>
 L:	linux-kernel@vger.kernel.org
-- 
2.20.1

Re: [PATCH] gpio fixup domain

[Bartosz Golaszewski]

wt., 29 sty 2019 o 14:35 Bartosz Golaszewski <brgl@bgdev.pl> napisał(a):
>
> From: Bartosz Golaszewski <bgolaszewski@baylibre.com>
>
> ---
>  arch/arm/boot/dts/am335x-bone-common.dtsi |   4 +
>  drivers/gpio/gpio-max77650.c              | 138 +++++++++++++++++++++-
>  2 files changed, 136 insertions(+), 6 deletions(-)
>
> diff --git a/arch/arm/boot/dts/am335x-bone-common.dtsi b/arch/arm/boot/dts/am335x-bone-common.dtsi
> index 62f7f2ac191c..320b4c21fdf3 100644
> --- a/arch/arm/boot/dts/am335x-bone-common.dtsi
> +++ b/arch/arm/boot/dts/am335x-bone-common.dtsi
> @@ -276,6 +276,10 @@
>
>                         gpio-controller;
>                         #gpio-cells = <2>;
> +
> +                       interrupt-parent = <&pmic>;
> +                       interrupts = <0 IRQ_TYPE_LEVEL_LOW>;
> +                       interrupt-names = "GPI";
>                 };
>
>                 leds {
> diff --git a/drivers/gpio/gpio-max77650.c b/drivers/gpio/gpio-max77650.c
> index 3f03f4e8956c..03a5a2ed07f8 100644
> --- a/drivers/gpio/gpio-max77650.c
> +++ b/drivers/gpio/gpio-max77650.c
> @@ -9,6 +9,7 @@
>  #include <linux/i2c.h>
>  #include <linux/mfd/max77650.h>
>  #include <linux/module.h>
> +#include <linux/of_irq.h>
>  #include <linux/platform_device.h>
>  #include <linux/regmap.h>
>
> @@ -34,7 +35,8 @@
>  struct max77650_gpio_chip {
>         struct regmap *map;
>         struct gpio_chip gc;
> -       int irq;
> +       struct fwnode_handle *fwnode;
> +       struct irq_domain *domain;
>  };
>
>  static int max77650_gpio_direction_input(struct gpio_chip *gc,
> @@ -130,20 +132,114 @@ static int max77650_gpio_set_config(struct gpio_chip *gc,
>         }
>  }
>
> +static struct irq_chip max77650_gpio_irq_chip = {
> +       .name = "max77650-gpio",
> +       .irq_ack = irq_chip_ack_parent,
> +       .irq_mask = irq_chip_mask_parent,
> +       .irq_unmask = irq_chip_unmask_parent,
> +       .irq_set_type = irq_chip_set_type_parent,
> +};
> +
> +static int max77650_gpio_irq_domain_activate(struct irq_domain *domain,
> +                                            struct irq_data *data,
> +                                            bool reserve)
> +{
> +       struct max77650_gpio_chip *chip = domain->host_data;
> +
> +       return gpiochip_lock_as_irq(&chip->gc, data->hwirq);
> +}
> +
> +static void max77650_gpio_irq_domain_deactivate(struct irq_domain *domain,
> +                                               struct irq_data *data)
> +{
> +       struct max77650_gpio_chip *chip = domain->host_data;
> +
> +       return gpiochip_unlock_as_irq(&chip->gc, data->hwirq);
> +}
> +
> +static int max77650_gpio_domain_translate(struct irq_domain *domain,
> +                                         struct irq_fwspec *fwspec,
> +                                         unsigned long *hwirq,
> +                                         unsigned int *type)
> +{
> +       struct max77650_gpio_chip *chip = domain->host_data;
> +
> +       if (fwspec->param_count != 2 || fwspec->param[0] >= chip->gc.ngpio)
> +               return -EINVAL;
> +
> +       *hwirq = fwspec->param[0];
> +       *type = fwspec->param[1];
> +
> +       return 0;
> +}
> +
> +static int max77650_gpio_domain_alloc(struct irq_domain *domain,
> +                                     unsigned int virq,
> +                                     unsigned int nr_irqs, void *data)
> +{
> +       struct max77650_gpio_chip *chip = domain->host_data;
> +       struct irq_fwspec *fwspec = data;
> +       struct irq_fwspec parent_fwspec;
> +       irq_hw_number_t hwirq;
> +       unsigned int type;
> +       int ret;
> +
> +       if (nr_irqs != 1)
> +               return -EINVAL;
> +
> +       ret = max77650_gpio_domain_translate(domain, fwspec, &hwirq, &type);
> +       if (ret)
> +               return ret;
> +
> +       irq_domain_set_info(domain, virq, hwirq,
> +                           &max77650_gpio_irq_chip, chip,
> +                           handle_level_irq, NULL, NULL);
> +
> +       parent_fwspec.fwnode = domain->parent->fwnode;
> +       parent_fwspec.param_count = 4;
> +       parent_fwspec.param[0] = 0;
> +       parent_fwspec.param[1] = hwirq;
> +       parent_fwspec.param[2] = 0;
> +       parent_fwspec.param[3] = fwspec->param[1];
> +
> +       return irq_domain_alloc_irqs_parent(domain, virq, nr_irqs,
> +                                           &parent_fwspec);
> +
> +       return 0;
> +}
> +
> +static const struct irq_domain_ops max77650_gpio_irq_domain_ops = {
> +       .activate = max77650_gpio_irq_domain_activate,
> +       .deactivate = max77650_gpio_irq_domain_deactivate,
> +       .alloc = max77650_gpio_domain_alloc,
> +       .free = irq_domain_free_irqs_common,
> +       .translate = max77650_gpio_domain_translate,
> +};
> +
>  static int max77650_gpio_to_irq(struct gpio_chip *gc, unsigned int offset)
>  {
>         struct max77650_gpio_chip *chip = gpiochip_get_data(gc);
> +       struct irq_fwspec fwspec;
> +
> +       fwspec.fwnode = chip->fwnode;
> +       fwspec.param_count = 2;
> +       fwspec.param[0] = 0;
> +       fwspec.param[1] = IRQ_TYPE_LEVEL_LOW;
>
> -       return chip->irq;
> +       return irq_create_fwspec_mapping(&fwspec);
>  }
>
>  static int max77650_gpio_probe(struct platform_device *pdev)
>  {
> +       struct device_node *of_node, *parent_node;
> +       struct irq_domain *parent_domain;
>         struct max77650_gpio_chip *chip;
>         struct device *dev, *parent;
>         struct i2c_client *i2c;
> +       int rv;
>
>         dev = &pdev->dev;
> +       of_node = dev->of_node;
>         parent = dev->parent;
>         i2c = to_i2c_client(parent);
>
> @@ -151,13 +247,29 @@ static int max77650_gpio_probe(struct platform_device *pdev)
>         if (!chip)
>                 return -ENOMEM;
>
> +       chip->fwnode = dev->fwnode;
> +       platform_set_drvdata(pdev, chip);
> +
>         chip->map = dev_get_regmap(parent, NULL);
>         if (!chip->map)
>                 return -ENODEV;
>
> -       chip->irq = platform_get_irq_byname(pdev, "GPI");
> -       if (chip->irq < 0)
> -               return chip->irq;
> +       parent_node = of_irq_find_parent(of_node);
> +       if (!parent_node)
> +               return -ENXIO;
> +
> +       parent_domain = irq_find_host(parent_node);
> +       of_node_put(parent_node);
> +       if (!parent_domain)
> +               return -ENXIO;
> +
> +       chip->fwnode = of_node_to_fwnode(of_node);
> +       chip->domain = irq_domain_create_hierarchy(parent_domain, 0, 1,
> +                                               chip->fwnode,
> +                                               &max77650_gpio_irq_domain_ops,
> +                                               chip);
> +       if (!chip->domain)
> +               return -ENODEV;
>
>         chip->gc.base = -1;
>         chip->gc.ngpio = 1;
> @@ -174,7 +286,20 @@ static int max77650_gpio_probe(struct platform_device *pdev)
>         chip->gc.set_config = max77650_gpio_set_config;
>         chip->gc.to_irq = max77650_gpio_to_irq;
>
> -       return devm_gpiochip_add_data(dev, &chip->gc, chip);
> +       rv = devm_gpiochip_add_data(dev, &chip->gc, chip);
> +       if (rv)
> +               irq_domain_remove(chip->domain);
> +
> +       return rv;
> +}
> +
> +static int max77650_gpio_remove(struct platform_device *pdev)
> +{
> +       struct max77650_gpio_chip *chip = platform_get_drvdata(pdev);
> +
> +       irq_domain_remove(chip->domain);
> +
> +       return 0;
>  }
>
>  static struct platform_driver max77650_gpio_driver = {
> @@ -182,6 +307,7 @@ static struct platform_driver max77650_gpio_driver = {
>                 .name = "max77650-gpio",
>         },
>         .probe = max77650_gpio_probe,
> +       .remove = max77650_gpio_remove,
>  };
>  module_platform_driver(max77650_gpio_driver);
>
> --
> 2.20.1
>

Please ignore this one, it got lost on the way. It was just experimentation.

Bart

Re: [PATCH v2 10/13] gpio: max77650: add GPIO support

[Linus Walleij]

On Tue, Jan 29, 2019 at 2:36 PM Bartosz Golaszewski <brgl@bgdev.pl> wrote:

> From: Bartosz Golaszewski <bgolaszewski@baylibre.com>
>
> Add GPIO support for max77650 mfd device. This PMIC exposes a single
> GPIO line.
>
> Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>

Reviewed-by: Linus Walleij <linus.walleij@linaro.org>

Yours,
Linus Walleij

Re: [PATCH] gpio fixup domain

[Linus Walleij]

On Tue, Jan 29, 2019 at 2:39 PM Bartosz Golaszewski <brgl@bgdev.pl> wrote:
> wt., 29 sty 2019 o 14:35 Bartosz Golaszewski <brgl@bgdev.pl> napisał(a):
>
> Please ignore this one, it got lost on the way. It was just experimentation.

Pretty interesting experiment anyways! Now both GPIO maintainers
know the intricacies of the hierarchical irq domains, which is a win
in itself when we try to come up with some generic handling here.

Yours,
Linus Walleij

Re: [PATCH v2 12/13] input: max77650: add onkey support

[Dmitry Torokhov]

On Tue, Jan 29, 2019 at 02:35:44PM +0100, Bartosz Golaszewski wrote:
> From: Bartosz Golaszewski <bgolaszewski@baylibre.com>
> 
> Add support for the push- and slide-button events for max77650.
> 
> Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>

Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

Please feel free to merge with other patches (MFD tree I suppose?).

Thanks.

-- 
Dmitry

Re: [PATCH v2 05/13] dt-bindings: leds: add DT bindings for max77650

[Jacek Anaszewski]

Hi Bartosz,

Thank you for addressing my remarks.

On 1/29/19 2:35 PM, Bartosz Golaszewski wrote:
> From: Bartosz Golaszewski <bgolaszewski@baylibre.com>
> 
> Add the DT binding document for the LEDs module of max77650.
> 
> Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
> ---
>   .../bindings/leds/leds-max77650.txt           | 57 +++++++++++++++++++
>   1 file changed, 57 insertions(+)
>   create mode 100644 Documentation/devicetree/bindings/leds/leds-max77650.txt
> 
> diff --git a/Documentation/devicetree/bindings/leds/leds-max77650.txt b/Documentation/devicetree/bindings/leds/leds-max77650.txt
> new file mode 100644
> index 000000000000..b2fac8e719a6
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/leds/leds-max77650.txt
> @@ -0,0 +1,57 @@
> +LED driver for MAX77650 PMIC from Maxim Integrated.
> +
> +This module is part of the MAX77650 MFD device. For more details
> +see Documentation/devicetree/bindings/mfd/max77650.txt.
> +
> +The LED controller is represented as a sub-node of the PMIC node on
> +the device tree.
> +
> +This device has three current sinks.
> +
> +Required properties:
> +--------------------
> +- compatible:		Must be "maxim,max77650-led"
> +- #address-cells:	Must be <1>.
> +- #size-cells:		Must be <0>.
> +
> +Each LED is represented as a sub-node of the LED-controller node. Up to
> +three sub-nodes can be defined.
> +
> +Required properties of the sub-node:
> +------------------------------------
> +
> +- reg:			Must be <0>, <1> or <2>.
> +
> +Optional properties of the sub-node:
> +------------------------------------
> +
> +- label:		See Documentation/devicetree/bindings/leds/common.txt
> +- linux,default-trigger: See Documentation/devicetree/bindings/leds/common.txt
> +
> +For more details, please refer to the generic GPIO DT binding document
> +<devicetree/bindings/gpio/gpio.txt>.
> +
> +Example:
> +--------
> +
> +	leds {
> +		compatible = "maxim,max77650-leds";

s/leds/led/

With that:

Acked-by: Jacek Anaszewski <jacek.anaszewski@gmail.com>

> +		#address-cells = <1>;
> +		#size-cells = <0>;
> +
> +		led@0 {
> +			reg = <0>;
> +			label = "blue:usr0";
> +		};
> +
> +		led@1 {
> +			reg = <1>;
> +			label = "red:usr1";
> +			linux,default-trigger = "heartbeat";
> +		};
> +
> +		led@2 {
> +			reg = <2>;
> +			label = "green:usr2";
> +		};
> +	};
> 

-- 
Best regards,
Jacek Anaszewski

Re: [PATCH v2 11/13] leds: max77650: add LEDs support

[Jacek Anaszewski]

Hi Bartosz,

Thank you for the update.

One more thing drew my attention, please refer below.

On 1/29/19 2:35 PM, Bartosz Golaszewski wrote:
> From: Bartosz Golaszewski <bgolaszewski@baylibre.com>
> 
> This adds basic support for LEDs for the max77650 PMIC. The device has
> three current sinks for driving LEDs.
> 
> Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
> ---
>   drivers/leds/Kconfig         |   6 ++
>   drivers/leds/Makefile        |   1 +
>   drivers/leds/leds-max77650.c | 152 +++++++++++++++++++++++++++++++++++
>   3 files changed, 159 insertions(+)
>   create mode 100644 drivers/leds/leds-max77650.c
> 
> diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig
> index a72f97fca57b..6e7a8f51eccc 100644
> --- a/drivers/leds/Kconfig
> +++ b/drivers/leds/Kconfig
> @@ -608,6 +608,12 @@ config LEDS_TLC591XX
>   	  This option enables support for Texas Instruments TLC59108
>   	  and TLC59116 LED controllers.
>   
> +config LEDS_MAX77650
> +	tristate "LED support for Maxim MAX77650 PMIC"
> +	depends on MFD_MAX77650
> +	help
> +	  LEDs driver for MAX77650 family of PMICs from Maxim Integrated."
> +
>   config LEDS_MAX77693
>   	tristate "LED support for MAX77693 Flash"
>   	depends on LEDS_CLASS_FLASH
> diff --git a/drivers/leds/Makefile b/drivers/leds/Makefile
> index 4c1b0054f379..f48b2404dbb7 100644
> --- a/drivers/leds/Makefile
> +++ b/drivers/leds/Makefile
> @@ -61,6 +61,7 @@ obj-$(CONFIG_LEDS_MC13783)		+= leds-mc13783.o
>   obj-$(CONFIG_LEDS_NS2)			+= leds-ns2.o
>   obj-$(CONFIG_LEDS_NETXBIG)		+= leds-netxbig.o
>   obj-$(CONFIG_LEDS_ASIC3)		+= leds-asic3.o
> +obj-$(CONFIG_LEDS_MAX77650)		+= leds-max77650.o
>   obj-$(CONFIG_LEDS_MAX77693)		+= leds-max77693.o
>   obj-$(CONFIG_LEDS_MAX8997)		+= leds-max8997.o
>   obj-$(CONFIG_LEDS_LM355x)		+= leds-lm355x.o
> diff --git a/drivers/leds/leds-max77650.c b/drivers/leds/leds-max77650.c
> new file mode 100644
> index 000000000000..e3a3c0e79b7a
> --- /dev/null
> +++ b/drivers/leds/leds-max77650.c
> @@ -0,0 +1,152 @@
> +// SPDX-License-Identifier: GPL-2.0
> +//
> +// Copyright (C) 2018 BayLibre SAS
> +// Author: Bartosz Golaszewski <bgolaszewski@baylibre.com>
> +//
> +// LED driver for MAXIM 77650/77651 charger/power-supply.
> +
> +#include <linux/i2c.h>
> +#include <linux/leds.h>
> +#include <linux/mfd/max77650.h>
> +#include <linux/module.h>
> +#include <linux/platform_device.h>
> +#include <linux/regmap.h>
> +
> +#define MAX77650_NUM_LEDS		3
> +
> +#define MAX77650_LED_A_BASE		0x40
> +#define MAX77650_LED_B_BASE		0x43
> +
> +#define MAX77650_LED_BR_MASK		GENMASK(4, 0)
> +#define MAX77650_LED_EN_MASK		GENMASK(7, 6)
> +
> +/* Enable EN_LED_MSTR. */
> +#define MAX77650_LED_TOP_DEFAULT	BIT(0)
> +
> +#define MAX77650_LED_ENABLE		GENMASK(7, 6)
> +#define MAX77650_LED_DISABLE		0x00
> +
> +#define MAX77650_LED_A_DEFAULT		MAX77650_LED_DISABLE
> +/* 100% on duty */
> +#define MAX77650_LED_B_DEFAULT		GENMASK(3, 0)
> +
> +struct max77650_led {
> +	struct led_classdev cdev;
> +	struct regmap *map;
> +	unsigned int regA;
> +	unsigned int regB;
> +};
> +
> +static struct max77650_led *max77650_to_led(struct led_classdev *cdev)
> +{
> +	return container_of(cdev, struct max77650_led, cdev);
> +}
> +
> +static int max77650_led_brightness_set(struct led_classdev *cdev,
> +				       enum led_brightness brightness)
> +{
> +	struct max77650_led *led = max77650_to_led(cdev);
> +	int val, mask;
> +
> +	mask = MAX77650_LED_BR_MASK | MAX77650_LED_EN_MASK;
> +
> +	if (brightness == LED_OFF) {
> +		val = MAX77650_LED_DISABLE;
> +	} else {
> +		val = MAX77650_LED_ENABLE;
> +		/*
> +		 * We can set the brightness with 5-bit resolution.
> +		 *
> +		 * For brightness == 1, the bits we're writing will be 0, but
> +		 * since we keep LED_FS0 set to 12.8mA full-scale range, the
> +		 * LED will be lit slightly.
> +		 */
> +		val |= brightness / 8;

We have max_brightness property and you seem not to use it.
With 5-bit brightness resolution it should be initialized
to 32 and then we will be able to avoid the division here.

> +	}
> +
> +	return regmap_update_bits(led->map, led->regA, mask, val);
> +}
> +
> +static int max77650_led_probe(struct platform_device *pdev)
> +{
> +	struct device_node *of_node, *child;
> +	struct max77650_led *leds, *led;
> +	struct device *parent;
> +	struct device *dev;
> +	struct regmap *map;
> +	const char *label;
> +	int rv, num_leds;
> +	u32 reg;
> +
> +	dev = &pdev->dev;
> +	parent = dev->parent;
> +	of_node = dev->of_node;
> +
> +	if (!of_node)
> +		return -ENODEV;
> +
> +	leds = devm_kcalloc(dev, sizeof(*leds), MAX77650_NUM_LEDS, GFP_KERNEL);
> +	if (!leds)
> +		return -ENOMEM;
> +
> +	map = dev_get_regmap(dev->parent, NULL);
> +	if (!map)
> +		return -ENODEV;
> +
> +	num_leds = of_get_child_count(of_node);
> +	if (!num_leds || num_leds > MAX77650_NUM_LEDS)
> +		return -ENODEV;
> +
> +	for_each_child_of_node(of_node, child) {
> +		rv = of_property_read_u32(child, "reg", &reg);
> +		if (rv || reg >= MAX77650_NUM_LEDS)
> +			return -EINVAL;
> +
> +		led = &leds[reg];
> +		led->map = map;
> +		led->regA = MAX77650_LED_A_BASE + reg;
> +		led->regB = MAX77650_LED_B_BASE + reg;
> +		led->cdev.brightness_set_blocking = max77650_led_brightness_set;
> +
> +		label = of_get_property(child, "label", NULL);
> +		if (!label) {
> +			led->cdev.name = "max77650::";
> +		} else {
> +			led->cdev.name = devm_kasprintf(dev, GFP_KERNEL,
> +							"max77650:%s", label);
> +			if (!led->cdev.name)
> +				return -ENOMEM;
> +		}
> +
> +		of_property_read_string(child, "linux,default-trigger",
> +					&led->cdev.default_trigger);
> +
> +		rv = devm_of_led_classdev_register(dev, child, &led->cdev);
> +		if (rv)
> +			return rv;
> +
> +		rv = regmap_write(map, led->regA, MAX77650_LED_A_DEFAULT);
> +		if (rv)
> +			return rv;
> +
> +		rv = regmap_write(map, led->regB, MAX77650_LED_B_DEFAULT);
> +		if (rv)
> +			return rv;
> +	}
> +
> +	return regmap_write(map,
> +			    MAX77650_REG_CNFG_LED_TOP,
> +			    MAX77650_LED_TOP_DEFAULT);
> +}
> +
> +static struct platform_driver max77650_led_driver = {
> +	.driver = {
> +		.name = "max77650-led",
> +	},
> +	.probe = max77650_led_probe,
> +};
> +module_platform_driver(max77650_led_driver);
> +
> +MODULE_DESCRIPTION("MAXIM 77650/77651 LED driver");
> +MODULE_AUTHOR("Bartosz Golaszewski <bgolaszewski@baylibre.com>");
> +MODULE_LICENSE("GPL v2");
> 

-- 
Best regards,
Jacek Anaszewski

Re: [PATCH v2 12/13] input: max77650: add onkey support

[Bartosz Golaszewski]

śr., 30 sty 2019 o 19:53 Dmitry Torokhov <dmitry.torokhov@gmail.com> napisał(a):
>
> On Tue, Jan 29, 2019 at 02:35:44PM +0100, Bartosz Golaszewski wrote:
> > From: Bartosz Golaszewski <bgolaszewski@baylibre.com>
> >
> > Add support for the push- and slide-button events for max77650.
> >
> > Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
>
> Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
>
> Please feel free to merge with other patches (MFD tree I suppose?).
>

Hi Dmitry,

I'm not sure what the policy is on merging MFD drivers, but I'm seeing
that Mark Brown has already picked up the regulator part into his tree
(including the binding document). I think you can just pick up the
input patches and it will simply not show up in Kconfig until the core
mfd module is upstream.

@Mark: could you please confirm it?

Best regards,
Bartosz Golaszewski

Re: [PATCH v2 12/13] input: max77650: add onkey support

[Mark Brown]

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On Thu, Jan 31, 2019 at 09:15:01AM +0100, Bartosz Golaszewski wrote:

> I'm not sure what the policy is on merging MFD drivers, but I'm seeing
> that Mark Brown has already picked up the regulator part into his tree
> (including the binding document). I think you can just pick up the
> input patches and it will simply not show up in Kconfig until the core
> mfd module is upstream.

> @Mark: could you please confirm it?

Right, as it's a new MFD the Kconfig will stop it causing build breakage
until the MFD is merged.  I'm doing it partly just to cut down on the
amount of mail from resends while the rest of the series gets reviewed.

[-- Attachment #2: signature.asc --]
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Re: [PATCH v2 12/13] input: max77650: add onkey support

[Dmitry Torokhov]

On Thu, Jan 31, 2019 at 4:28 AM Mark Brown <broonie@kernel.org> wrote:
>
> On Thu, Jan 31, 2019 at 09:15:01AM +0100, Bartosz Golaszewski wrote:
>
> > I'm not sure what the policy is on merging MFD drivers, but I'm seeing
> > that Mark Brown has already picked up the regulator part into his tree
> > (including the binding document). I think you can just pick up the
> > input patches and it will simply not show up in Kconfig until the core
> > mfd module is upstream.
>
> > @Mark: could you please confirm it?
>
> Right, as it's a new MFD the Kconfig will stop it causing build breakage
> until the MFD is merged.  I'm doing it partly just to cut down on the
> amount of mail from resends while the rest of the series gets reviewed.

Ugh, I might have pulled it in if it did not reference the new header
file. As a rule I try to enable all symbols that result in input
devices being created so as much of input code is covered... I'd
prefer input piece be merged with MFD.

Thanks.

-- 
Dmitry

Re: [PATCH v2 12/13] input: max77650: add onkey support

[Lee Jones]

On Thu, 31 Jan 2019, Dmitry Torokhov wrote:

> On Thu, Jan 31, 2019 at 4:28 AM Mark Brown <broonie@kernel.org> wrote:
> >
> > On Thu, Jan 31, 2019 at 09:15:01AM +0100, Bartosz Golaszewski wrote:
> >
> > > I'm not sure what the policy is on merging MFD drivers, but I'm seeing
> > > that Mark Brown has already picked up the regulator part into his tree
> > > (including the binding document). I think you can just pick up the
> > > input patches and it will simply not show up in Kconfig until the core
> > > mfd module is upstream.
> >
> > > @Mark: could you please confirm it?
> >
> > Right, as it's a new MFD the Kconfig will stop it causing build breakage
> > until the MFD is merged.  I'm doing it partly just to cut down on the
> > amount of mail from resends while the rest of the series gets reviewed.
> 
> Ugh, I might have pulled it in if it did not reference the new header
> file. As a rule I try to enable all symbols that result in input
> devices being created so as much of input code is covered... I'd
> prefer input piece be merged with MFD.

That's no problem.

-- 
Lee Jones [李琼斯]
Linaro Services Technical Lead
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