v4.19.13 snapshot.
diff --git a/drivers/gpio/gpio-arizona.c b/drivers/gpio/gpio-arizona.c
new file mode 100644
index 0000000..ba51ea1
--- /dev/null
+++ b/drivers/gpio/gpio-arizona.c
@@ -0,0 +1,213 @@
+/*
+ * gpiolib support for Wolfson Arizona class devices
+ *
+ * Copyright 2012 Wolfson Microelectronics PLC.
+ *
+ * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/gpio/driver.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/seq_file.h>
+
+#include <linux/mfd/arizona/core.h>
+#include <linux/mfd/arizona/pdata.h>
+#include <linux/mfd/arizona/registers.h>
+
+struct arizona_gpio {
+ struct arizona *arizona;
+ struct gpio_chip gpio_chip;
+};
+
+static int arizona_gpio_direction_in(struct gpio_chip *chip, unsigned offset)
+{
+ struct arizona_gpio *arizona_gpio = gpiochip_get_data(chip);
+ struct arizona *arizona = arizona_gpio->arizona;
+ bool persistent = gpiochip_line_is_persistent(chip, offset);
+ bool change;
+ int ret;
+
+ ret = regmap_update_bits_check(arizona->regmap,
+ ARIZONA_GPIO1_CTRL + offset,
+ ARIZONA_GPN_DIR, ARIZONA_GPN_DIR,
+ &change);
+ if (ret < 0)
+ return ret;
+
+ if (change && persistent) {
+ pm_runtime_mark_last_busy(chip->parent);
+ pm_runtime_put_autosuspend(chip->parent);
+ }
+
+ return 0;
+}
+
+static int arizona_gpio_get(struct gpio_chip *chip, unsigned offset)
+{
+ struct arizona_gpio *arizona_gpio = gpiochip_get_data(chip);
+ struct arizona *arizona = arizona_gpio->arizona;
+ unsigned int reg, val;
+ int ret;
+
+ reg = ARIZONA_GPIO1_CTRL + offset;
+ ret = regmap_read(arizona->regmap, reg, &val);
+ if (ret < 0)
+ return ret;
+
+ /* Resume to read actual registers for input pins */
+ if (val & ARIZONA_GPN_DIR) {
+ ret = pm_runtime_get_sync(chip->parent);
+ if (ret < 0) {
+ dev_err(chip->parent, "Failed to resume: %d\n", ret);
+ return ret;
+ }
+
+ /* Register is cached, drop it to ensure a physical read */
+ ret = regcache_drop_region(arizona->regmap, reg, reg);
+ if (ret < 0) {
+ dev_err(chip->parent, "Failed to drop cache: %d\n",
+ ret);
+ return ret;
+ }
+
+ ret = regmap_read(arizona->regmap, reg, &val);
+ if (ret < 0)
+ return ret;
+
+ pm_runtime_mark_last_busy(chip->parent);
+ pm_runtime_put_autosuspend(chip->parent);
+ }
+
+ if (val & ARIZONA_GPN_LVL)
+ return 1;
+ else
+ return 0;
+}
+
+static int arizona_gpio_direction_out(struct gpio_chip *chip,
+ unsigned offset, int value)
+{
+ struct arizona_gpio *arizona_gpio = gpiochip_get_data(chip);
+ struct arizona *arizona = arizona_gpio->arizona;
+ bool persistent = gpiochip_line_is_persistent(chip, offset);
+ unsigned int val;
+ int ret;
+
+ ret = regmap_read(arizona->regmap, ARIZONA_GPIO1_CTRL + offset, &val);
+ if (ret < 0)
+ return ret;
+
+ if ((val & ARIZONA_GPN_DIR) && persistent) {
+ ret = pm_runtime_get_sync(chip->parent);
+ if (ret < 0) {
+ dev_err(chip->parent, "Failed to resume: %d\n", ret);
+ return ret;
+ }
+ }
+
+ if (value)
+ value = ARIZONA_GPN_LVL;
+
+ return regmap_update_bits(arizona->regmap, ARIZONA_GPIO1_CTRL + offset,
+ ARIZONA_GPN_DIR | ARIZONA_GPN_LVL, value);
+}
+
+static void arizona_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
+{
+ struct arizona_gpio *arizona_gpio = gpiochip_get_data(chip);
+ struct arizona *arizona = arizona_gpio->arizona;
+
+ if (value)
+ value = ARIZONA_GPN_LVL;
+
+ regmap_update_bits(arizona->regmap, ARIZONA_GPIO1_CTRL + offset,
+ ARIZONA_GPN_LVL, value);
+}
+
+static const struct gpio_chip template_chip = {
+ .label = "arizona",
+ .owner = THIS_MODULE,
+ .direction_input = arizona_gpio_direction_in,
+ .get = arizona_gpio_get,
+ .direction_output = arizona_gpio_direction_out,
+ .set = arizona_gpio_set,
+ .can_sleep = true,
+};
+
+static int arizona_gpio_probe(struct platform_device *pdev)
+{
+ struct arizona *arizona = dev_get_drvdata(pdev->dev.parent);
+ struct arizona_pdata *pdata = dev_get_platdata(arizona->dev);
+ struct arizona_gpio *arizona_gpio;
+ int ret;
+
+ arizona_gpio = devm_kzalloc(&pdev->dev, sizeof(*arizona_gpio),
+ GFP_KERNEL);
+ if (!arizona_gpio)
+ return -ENOMEM;
+
+ arizona_gpio->arizona = arizona;
+ arizona_gpio->gpio_chip = template_chip;
+ arizona_gpio->gpio_chip.parent = &pdev->dev;
+#ifdef CONFIG_OF_GPIO
+ arizona_gpio->gpio_chip.of_node = arizona->dev->of_node;
+#endif
+
+ switch (arizona->type) {
+ case WM5102:
+ case WM5110:
+ case WM8280:
+ case WM8997:
+ case WM8998:
+ case WM1814:
+ arizona_gpio->gpio_chip.ngpio = 5;
+ break;
+ case WM1831:
+ case CS47L24:
+ arizona_gpio->gpio_chip.ngpio = 2;
+ break;
+ default:
+ dev_err(&pdev->dev, "Unknown chip variant %d\n",
+ arizona->type);
+ return -EINVAL;
+ }
+
+ if (pdata && pdata->gpio_base)
+ arizona_gpio->gpio_chip.base = pdata->gpio_base;
+ else
+ arizona_gpio->gpio_chip.base = -1;
+
+ pm_runtime_enable(&pdev->dev);
+
+ ret = devm_gpiochip_add_data(&pdev->dev, &arizona_gpio->gpio_chip,
+ arizona_gpio);
+ if (ret < 0) {
+ dev_err(&pdev->dev, "Could not register gpiochip, %d\n",
+ ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+static struct platform_driver arizona_gpio_driver = {
+ .driver.name = "arizona-gpio",
+ .probe = arizona_gpio_probe,
+};
+
+module_platform_driver(arizona_gpio_driver);
+
+MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
+MODULE_DESCRIPTION("GPIO interface for Arizona devices");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:arizona-gpio");