v4.19.13 snapshot.
diff --git a/drivers/gpio/gpio-rc5t583.c b/drivers/gpio/gpio-rc5t583.c
new file mode 100644
index 0000000..a499c63
--- /dev/null
+++ b/drivers/gpio/gpio-rc5t583.c
@@ -0,0 +1,153 @@
+/*
+ * GPIO driver for RICOH583 power management chip.
+ *
+ * Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved.
+ * Author: Laxman dewangan <ldewangan@nvidia.com>
+ *
+ * Based on code
+ * Copyright (C) 2011 RICOH COMPANY,LTD
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/platform_device.h>
+#include <linux/device.h>
+#include <linux/gpio/driver.h>
+#include <linux/mfd/rc5t583.h>
+
+struct rc5t583_gpio {
+ struct gpio_chip gpio_chip;
+ struct rc5t583 *rc5t583;
+};
+
+static int rc5t583_gpio_get(struct gpio_chip *gc, unsigned int offset)
+{
+ struct rc5t583_gpio *rc5t583_gpio = gpiochip_get_data(gc);
+ struct device *parent = rc5t583_gpio->rc5t583->dev;
+ uint8_t val = 0;
+ int ret;
+
+ ret = rc5t583_read(parent, RC5T583_GPIO_MON_IOIN, &val);
+ if (ret < 0)
+ return ret;
+
+ return !!(val & BIT(offset));
+}
+
+static void rc5t583_gpio_set(struct gpio_chip *gc, unsigned int offset, int val)
+{
+ struct rc5t583_gpio *rc5t583_gpio = gpiochip_get_data(gc);
+ struct device *parent = rc5t583_gpio->rc5t583->dev;
+ if (val)
+ rc5t583_set_bits(parent, RC5T583_GPIO_IOOUT, BIT(offset));
+ else
+ rc5t583_clear_bits(parent, RC5T583_GPIO_IOOUT, BIT(offset));
+}
+
+static int rc5t583_gpio_dir_input(struct gpio_chip *gc, unsigned int offset)
+{
+ struct rc5t583_gpio *rc5t583_gpio = gpiochip_get_data(gc);
+ struct device *parent = rc5t583_gpio->rc5t583->dev;
+ int ret;
+
+ ret = rc5t583_clear_bits(parent, RC5T583_GPIO_IOSEL, BIT(offset));
+ if (ret < 0)
+ return ret;
+
+ /* Set pin to gpio mode */
+ return rc5t583_clear_bits(parent, RC5T583_GPIO_PGSEL, BIT(offset));
+}
+
+static int rc5t583_gpio_dir_output(struct gpio_chip *gc, unsigned offset,
+ int value)
+{
+ struct rc5t583_gpio *rc5t583_gpio = gpiochip_get_data(gc);
+ struct device *parent = rc5t583_gpio->rc5t583->dev;
+ int ret;
+
+ rc5t583_gpio_set(gc, offset, value);
+ ret = rc5t583_set_bits(parent, RC5T583_GPIO_IOSEL, BIT(offset));
+ if (ret < 0)
+ return ret;
+
+ /* Set pin to gpio mode */
+ return rc5t583_clear_bits(parent, RC5T583_GPIO_PGSEL, BIT(offset));
+}
+
+static int rc5t583_gpio_to_irq(struct gpio_chip *gc, unsigned offset)
+{
+ struct rc5t583_gpio *rc5t583_gpio = gpiochip_get_data(gc);
+
+ if (offset < RC5T583_MAX_GPIO)
+ return rc5t583_gpio->rc5t583->irq_base +
+ RC5T583_IRQ_GPIO0 + offset;
+ return -EINVAL;
+}
+
+static void rc5t583_gpio_free(struct gpio_chip *gc, unsigned offset)
+{
+ struct rc5t583_gpio *rc5t583_gpio = gpiochip_get_data(gc);
+ struct device *parent = rc5t583_gpio->rc5t583->dev;
+
+ rc5t583_set_bits(parent, RC5T583_GPIO_PGSEL, BIT(offset));
+}
+
+static int rc5t583_gpio_probe(struct platform_device *pdev)
+{
+ struct rc5t583 *rc5t583 = dev_get_drvdata(pdev->dev.parent);
+ struct rc5t583_platform_data *pdata = dev_get_platdata(rc5t583->dev);
+ struct rc5t583_gpio *rc5t583_gpio;
+
+ rc5t583_gpio = devm_kzalloc(&pdev->dev, sizeof(*rc5t583_gpio),
+ GFP_KERNEL);
+ if (!rc5t583_gpio)
+ return -ENOMEM;
+
+ rc5t583_gpio->gpio_chip.label = "gpio-rc5t583",
+ rc5t583_gpio->gpio_chip.owner = THIS_MODULE,
+ rc5t583_gpio->gpio_chip.free = rc5t583_gpio_free,
+ rc5t583_gpio->gpio_chip.direction_input = rc5t583_gpio_dir_input,
+ rc5t583_gpio->gpio_chip.direction_output = rc5t583_gpio_dir_output,
+ rc5t583_gpio->gpio_chip.set = rc5t583_gpio_set,
+ rc5t583_gpio->gpio_chip.get = rc5t583_gpio_get,
+ rc5t583_gpio->gpio_chip.to_irq = rc5t583_gpio_to_irq,
+ rc5t583_gpio->gpio_chip.ngpio = RC5T583_MAX_GPIO,
+ rc5t583_gpio->gpio_chip.can_sleep = true,
+ rc5t583_gpio->gpio_chip.parent = &pdev->dev;
+ rc5t583_gpio->gpio_chip.base = -1;
+ rc5t583_gpio->rc5t583 = rc5t583;
+
+ if (pdata && pdata->gpio_base)
+ rc5t583_gpio->gpio_chip.base = pdata->gpio_base;
+
+ platform_set_drvdata(pdev, rc5t583_gpio);
+
+ return devm_gpiochip_add_data(&pdev->dev, &rc5t583_gpio->gpio_chip,
+ rc5t583_gpio);
+}
+
+static struct platform_driver rc5t583_gpio_driver = {
+ .driver = {
+ .name = "rc5t583-gpio",
+ },
+ .probe = rc5t583_gpio_probe,
+};
+
+static int __init rc5t583_gpio_init(void)
+{
+ return platform_driver_register(&rc5t583_gpio_driver);
+}
+subsys_initcall(rc5t583_gpio_init);