The DA9062 is a mfd pmic device which supports 5 GPIOs. The GPIOs can
be used as input, output or have a special use-case.
The patch adds the support for the normal input/output use-case.
Signed-off-by: Marco Felsch <m.felsch@xxxxxxxxxxxxxx>
---
drivers/gpio/Kconfig | 11 ++
drivers/gpio/Makefile | 1 +
drivers/gpio/gpio-da9062.c | 265 ++++++++++++++++++++++++++++++++
include/linux/mfd/da9062/gpio.h | 13 ++
4 files changed, 290 insertions(+)
create mode 100644 drivers/gpio/gpio-da9062.c
create mode 100644 include/linux/mfd/da9062/gpio.h
diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index bb13c266c329..b308ea549aaa 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -1038,6 +1038,17 @@ config GPIO_DA9055
If driver is built as a module it will be called gpio-da9055.
+config GPIO_DA9062
+ tristate "Dialog Semiconductor DA9062 GPIO"
+ depends on MFD_DA9062
+ help
+ Say yes here to enable the GPIO driver for the DA9062 chip.
+
+ The Dialog DA9062 PMIC chip has 5 GPIO pins that can be
+ be controller by this driver.
+
+ If driver is built as a module it will be called gpio-da9062.
+
config GPIO_DLN2
tristate "Diolan DLN2 GPIO support"
depends on MFD_DLN2
diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile
index a4e91175c708..f29c8af2d096 100644
--- a/drivers/gpio/Makefile
+++ b/drivers/gpio/Makefile
@@ -45,6 +45,7 @@ obj-$(CONFIG_GPIO_CRYSTAL_COVE) += gpio-crystalcove.o
obj-$(CONFIG_GPIO_CS5535) += gpio-cs5535.o
obj-$(CONFIG_GPIO_DA9052) += gpio-da9052.o
obj-$(CONFIG_GPIO_DA9055) += gpio-da9055.o
+obj-$(CONFIG_GPIO_DA9062) += gpio-da9062.o
obj-$(CONFIG_GPIO_DAVINCI) += gpio-davinci.o
obj-$(CONFIG_GPIO_DLN2) += gpio-dln2.o
obj-$(CONFIG_GPIO_DWAPB) += gpio-dwapb.o
diff --git a/drivers/gpio/gpio-da9062.c b/drivers/gpio/gpio-da9062.c
new file mode 100644
index 000000000000..6035963929a2
--- /dev/null
+++ b/drivers/gpio/gpio-da9062.c
@@ -0,0 +1,265 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * GPIO Driver for Dialog DA9062 PMICs.
+ * Based on DA9055 GPIO driver.
+ *
+ * Copyright (C) 2019 Pengutronix, Marco Felsch <kernel@xxxxxxxxxxxxxx>
+ */
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+
+#include <linux/gpio/driver.h>
+#include <linux/gpio/consumer.h>
+
+#include <linux/mfd/da9062/core.h>
+#include <linux/mfd/da9062/registers.h>
+
+#include "gpiolib.h"
+
+#define DA9062_TYPE(offset) (4 * (offset % 2))
+#define DA9062_PIN_SHIFT(offset) (4 * (offset % 2))
+#define DA9062_PIN_ALTERNATE 0x00 /* gpio alternate mode */
+#define DA9062_PIN_GPI 0x01 /* gpio in */
+#define DA9062_PIN_GPO_OD 0x02 /* gpio out open-drain */
+#define DA9062_PIN_GPO_PP 0x03 /* gpio out push-pull */
+#define DA9062_GPIO_NUM 5
+
+struct da9062_gpio {
+ struct da9062 *da9062;
+ struct gpio_chip gp;
+};
+
+int da9062_gpio_get_hwgpio(struct gpio_desc *desc)
+{
+ return gpio_chip_hwgpio(desc);
+}
+EXPORT_SYMBOL_GPL(da9062_gpio_get_hwgpio);
+
+static int da9062_gpio_get_pin_mode(struct regmap *regmap, unsigned int offset)
+{
+ int ret;
+ int val;
+
+ ret = regmap_read(regmap, DA9062AA_GPIO_0_1 + (offset >> 1), &val);
+ if (ret < 0)
+ return ret;
+
+ val >>= DA9062_PIN_SHIFT(offset);
+ val &= DA9062AA_GPIO0_PIN_MASK;
+
+ return val;
+}
+
+static int da9062_gpio_set_pin_mode(struct regmap *regmap, unsigned int offset,
+ unsigned int mode)
+{
+ unsigned int mask;
+
+ mode &= DA9062AA_GPIO0_PIN_MASK;
+ mode <<= DA9062_PIN_SHIFT(offset);
+ mask = DA9062AA_GPIO0_PIN_MASK << DA9062_PIN_SHIFT(offset);
+
+ return regmap_update_bits(regmap, DA9062AA_GPIO_0_1 + (offset >> 1),
+ mask, mode);
+}
+
+static int da9062_gpio_get(struct gpio_chip *gc, unsigned int offset)
+{
+ struct da9062_gpio *gpio = gpiochip_get_data(gc);
+ struct regmap *regmap = gpio->da9062->regmap;
+ int gpio_dir, val;
+ int ret;
+
+ gpio_dir = da9062_gpio_get_pin_mode(regmap, offset);
+ if (gpio_dir < 0)
+ return gpio_dir;
+
+ switch (gpio_dir) {
+ case DA9062_PIN_ALTERNATE:
+ return -ENOTSUPP;
+ case DA9062_PIN_GPI:
+ ret = regmap_read(regmap, DA9062AA_STATUS_B, &val);
+ if (ret < 0)
+ return ret;
+ break;
+ case DA9062_PIN_GPO_OD:
+ /* falltrough */
+ case DA9062_PIN_GPO_PP:
+ ret = regmap_read(regmap, DA9062AA_GPIO_MODE0_4, &val);
+ if (ret < 0)
+ return ret;
+ }
+
+ return val & BIT(offset);
+}
+
+static void da9062_gpio_set(struct gpio_chip *gc, unsigned int offset,
+ int value)
+{
+ struct da9062_gpio *gpio = gpiochip_get_data(gc);
+ struct regmap *regmap = gpio->da9062->regmap;
+
+ regmap_update_bits(regmap, DA9062AA_GPIO_MODE0_4, BIT(offset),
+ value << offset);
+}
+
+static int da9062_gpio_get_direction(struct gpio_chip *gc, unsigned int offset)
+{
+ struct da9062_gpio *gpio = gpiochip_get_data(gc);
+ struct regmap *regmap = gpio->da9062->regmap;
+ int gpio_dir;
+
+ gpio_dir = da9062_gpio_get_pin_mode(regmap, offset);
+ if (gpio_dir < 0)
+ return gpio_dir;
+
+ switch (gpio_dir) {
+ case DA9062_PIN_ALTERNATE:
+ return -ENOTSUPP;
+ case DA9062_PIN_GPI:
+ return 1;
+ case DA9062_PIN_GPO_OD:
+ /* falltrough */
+ case DA9062_PIN_GPO_PP:
+ return 0;
+ }
+
+ return -EINVAL;
+}
+
+static int da9062_gpio_direction_input(struct gpio_chip *gc,
+ unsigned int offset)
+{
+ struct da9062_gpio *gpio = gpiochip_get_data(gc);
+ struct regmap *regmap = gpio->da9062->regmap;
+ struct gpio_desc *desc = gpiochip_get_desc(gc, offset);
+ unsigned int gpi_type;
+ int ret;
+
+ ret = da9062_gpio_set_pin_mode(regmap, offset, DA9062_PIN_GPI);
+ if (ret)
+ return ret;
+
+ /*
+ * If the gpio is active low we should set it in hw too. No worries
+ * about gpio_get() because we read and return the gpio-level. So the
+ * gpiolob active_low handling is still correct.
+ *
+ * 0 - active low, 1 - active high
+ */
+ gpi_type = !gpiod_is_active_low(desc);
+ return regmap_update_bits(regmap, DA9062AA_GPIO_0_1 + (offset >> 1),
+ DA9062AA_GPIO0_TYPE_MASK << DA9062_TYPE(offset),
+ gpi_type << DA9062_TYPE(offset));
+}
+
+static int da9062_gpio_direction_output(struct gpio_chip *gc,
+ unsigned int offset, int value)
+{
+ /* Push-Pull / Open-Drain options are configured during set_config */
+ da9062_gpio_set(gc, offset, value);
+
+ return 0;
+}
+
+static int da9062_gpio_set_config(struct gpio_chip *gc, unsigned int offset,
+ unsigned long config)
+{
+ struct da9062_gpio *gpio = gpiochip_get_data(gc);
+ struct regmap *regmap = gpio->da9062->regmap;
+ int gpio_dir;
+
+ switch (pinconf_to_config_param(config)) {
+ case PIN_CONFIG_BIAS_PULL_DOWN:
+ /* PD only if pin is input */
+ gpio_dir = da9062_gpio_get_pin_mode(regmap, offset);
+ if (gpio_dir < 0)
+ return -EINVAL;
+ else if (gpio_dir != DA9062_PIN_GPI)
+ return -ENOTSUPP;
+ return regmap_update_bits(regmap, DA9062AA_CONFIG_K,
+ BIT(offset), BIT(offset));
+ case PIN_CONFIG_BIAS_PULL_UP:
+ /* PU only if pin is output open-drain */
+ gpio_dir = da9062_gpio_get_pin_mode(regmap, offset);
+ if (gpio_dir < 0)
+ return -EINVAL;
+ else if (gpio_dir != DA9062_PIN_GPO_OD)
+ return -ENOTSUPP;
+ return regmap_update_bits(regmap, DA9062AA_CONFIG_K,
+ BIT(offset), BIT(offset));
+ case PIN_CONFIG_DRIVE_OPEN_DRAIN:
+ return da9062_gpio_set_pin_mode(regmap, offset,
+ DA9062_PIN_GPO_OD);
+ case PIN_CONFIG_DRIVE_PUSH_PULL:
+ return da9062_gpio_set_pin_mode(regmap, offset,
+ DA9062_PIN_GPO_PP);
+ default:
+ return -ENOTSUPP;
+ }
+}
+
+static int da9062_gpio_to_irq(struct gpio_chip *gc, unsigned int offset)
+{
+ struct da9062_gpio *gpio = gpiochip_get_data(gc);
+ struct da9062 *da9062 = gpio->da9062;
+
+ return regmap_irq_get_virq(da9062->regmap_irq,
+ DA9062_IRQ_GPI0 + offset);
+}
+
+static const struct gpio_chip reference_gp = {
+ .label = "da9062-gpio",
+ .owner = THIS_MODULE,
+ .get = da9062_gpio_get,
+ .set = da9062_gpio_set,
+ .get_direction = da9062_gpio_get_direction,
+ .direction_input = da9062_gpio_direction_input,
+ .direction_output = da9062_gpio_direction_output,
+ .set_config = da9062_gpio_set_config,
+ .to_irq = da9062_gpio_to_irq,
+ .can_sleep = true,
+ .ngpio = DA9062_GPIO_NUM,
+ .base = -1,
+};
+
+static int da9062_gpio_probe(struct platform_device *pdev)
+{
+ struct da9062_gpio *gpio;
+
+ gpio = devm_kzalloc(&pdev->dev, sizeof(*gpio), GFP_KERNEL);
+ if (!gpio)
+ return -ENOMEM;
+
+ gpio->da9062 = dev_get_drvdata(pdev->dev.parent);
+ if (!gpio->da9062)
+ return -EINVAL;
+
+ gpio->gp = reference_gp;
+ gpio->gp.parent = &pdev->dev;
+
+ platform_set_drvdata(pdev, gpio);
+
+ return devm_gpiochip_add_data(&pdev->dev, &gpio->gp, gpio);
+}
+
+static const struct of_device_id da9062_compatible_id_table[] = {
+ { .compatible = "dlg,da9062-gpio" },
+ { },
+};
+MODULE_DEVICE_TABLE(of, da9062_compatible_id_table);
+
+static struct platform_driver da9062_gpio_driver = {
+ .probe = da9062_gpio_probe,
+ .driver = {
+ .name = "da9062-gpio",
+ .of_match_table = da9062_compatible_id_table,
+ },
+};
+module_platform_driver(da9062_gpio_driver);
+
+MODULE_AUTHOR("Marco Felsch <kernel@xxxxxxxxxxxxxx>");
+MODULE_DESCRIPTION("DA9062 GPIO Device Driver");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:da9062-gpio");
diff --git a/include/linux/mfd/da9062/gpio.h b/include/linux/mfd/da9062/gpio.h
new file mode 100644
index 000000000000..67627ada1ad4
--- /dev/null
+++ b/include/linux/mfd/da9062/gpio.h
@@ -0,0 +1,13 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2019 Pengutronix, Marco Felsch <kernel@xxxxxxxxxxxxxx>
+ */
+
+#ifndef __MFD_DA9062_GPIO_H__
+#define __MFD_DA9062_GPIO_H__
+
+struct gpio_desc;
+
+int da9062_gpio_get_hwgpio(struct gpio_desc *desc);
+
+#endif /* __MFD_DA9062_GPIO_H__ */
--
2.20.1
