From: Bartosz Golaszewski <brgl@bgdev.pl>
To: Rob Herring <robh+dt@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
Linus Walleij <linus.walleij@linaro.org>,
Dmitry Torokhov <dmitry.torokhov@gmail.com>,
Jacek Anaszewski <jacek.anaszewski@gmail.com>,
Pavel Machek <pavel@ucw.cz>, Lee Jones <lee.jones@linaro.org>,
Sebastian Reichel <sre@kernel.org>,
Liam Girdwood <lgirdwood@gmail.com>,
Mark Brown <broonie@kernel.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: linux-kernel@vger.kernel.org, linux-gpio@vger.kernel.org,
devicetree@vger.kernel.org, linux-input@vger.kernel.org,
linux-leds@vger.kernel.org, linux-pm@vger.kernel.org,
Bartosz Golaszewski <bgolaszewski@baylibre.com>
Subject: [PATCH 10/13] gpio: max77650: add GPIO support
Date: Fri, 18 Jan 2019 14:42:41 +0100 [thread overview]
Message-ID: <20190118134244.22253-11-brgl@bgdev.pl> (raw)
In-Reply-To: <20190118134244.22253-1-brgl@bgdev.pl>
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..f8fe2b083e4d
--- /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 regmap_irq_chip_data *irq_chip_data;
+ 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)
+{
+ struct max77650_gpio_chip *chip = gpiochip_get_data(gc);
+
+ return regmap_irq_get_virq(chip->irq_chip_data, MAX77650_INT_GPI);
+}
+
+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->irq_chip_data = i2c_get_clientdata(i2c);
+
+ 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");
--
2.19.1
next prev parent reply other threads:[~2019-01-18 13:42 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-01-18 13:42 [PATCH 00/13] mfd: add support for max77650 PMIC Bartosz Golaszewski
2019-01-18 13:42 ` [PATCH 01/13] dt-bindings: mfd: add DT bindings for max77650 Bartosz Golaszewski
2019-01-18 13:42 ` [PATCH 02/13] dt-bindings: regulator: " Bartosz Golaszewski
2019-01-18 13:42 ` [PATCH 03/13] dt-bindings: power: supply: " Bartosz Golaszewski
2019-01-18 13:42 ` [PATCH 04/13] dt-bindings: gpio: " Bartosz Golaszewski
2019-01-21 14:04 ` Linus Walleij
2019-01-21 14:04 ` Linus Walleij
2019-01-18 13:42 ` [PATCH 05/13] dt-bindings: leds: " Bartosz Golaszewski
2019-01-20 16:28 ` Jacek Anaszewski
2019-01-18 13:42 ` [PATCH 06/13] dt-bindings: input: " Bartosz Golaszewski
2019-01-18 13:42 ` [PATCH 07/13] mfd: max77650: new core mfd driver Bartosz Golaszewski
2019-01-18 13:42 ` [PATCH 08/13] regulator: max77650: add regulator support Bartosz Golaszewski
2019-01-18 18:01 ` Mark Brown
2019-01-18 18:13 ` Bartosz Golaszewski
2019-01-18 18:36 ` Mark Brown
2019-01-18 18:18 ` Bartosz Golaszewski
2019-01-18 13:42 ` [PATCH 09/13] power: supply: max77650: add support for battery charger Bartosz Golaszewski
2019-01-23 18:27 ` Sebastian Reichel
2019-01-18 13:42 ` Bartosz Golaszewski [this message]
2019-01-21 14:20 ` [PATCH 10/13] gpio: max77650: add GPIO support Linus Walleij
2019-01-21 14:20 ` Linus Walleij
2019-01-21 17:07 ` Bartosz Golaszewski
2019-01-21 17:07 ` Bartosz Golaszewski
2019-01-24 10:30 ` Linus Walleij
2019-01-24 10:30 ` Linus Walleij
2019-01-29 11:00 ` Bartosz Golaszewski
2019-01-29 11:00 ` Bartosz Golaszewski
2019-01-29 13:22 ` Bartosz Golaszewski
2019-01-29 13:22 ` Bartosz Golaszewski
2019-01-18 13:42 ` [PATCH 11/13] leds: max77650: add LEDs support Bartosz Golaszewski
2019-01-20 16:39 ` Jacek Anaszewski
2019-01-18 13:42 ` [PATCH 12/13] input: max77650: add onkey support Bartosz Golaszewski
2019-01-19 9:03 ` Dmitry Torokhov
2019-01-21 10:52 ` Bartosz Golaszewski
2019-01-28 19:22 ` Dmitry Torokhov
2019-02-12 20:34 ` Lee Jones
2019-02-13 7:30 ` Dmitry Torokhov
2019-02-14 9:42 ` Lee Jones
2019-01-18 13:42 ` [PATCH 13/13] MAINTAINERS: add an entry for max77650 mfd driver Bartosz Golaszewski
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20190118134244.22253-11-brgl@bgdev.pl \
--to=brgl@bgdev.pl \
--cc=bgolaszewski@baylibre.com \
--cc=broonie@kernel.org \
--cc=devicetree@vger.kernel.org \
--cc=dmitry.torokhov@gmail.com \
--cc=gregkh@linuxfoundation.org \
--cc=jacek.anaszewski@gmail.com \
--cc=lee.jones@linaro.org \
--cc=lgirdwood@gmail.com \
--cc=linus.walleij@linaro.org \
--cc=linux-gpio@vger.kernel.org \
--cc=linux-input@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-leds@vger.kernel.org \
--cc=linux-pm@vger.kernel.org \
--cc=mark.rutland@arm.com \
--cc=pavel@ucw.cz \
--cc=robh+dt@kernel.org \
--cc=sre@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.