[Feature]add MT2731_MP2_MR2_SVN388 baseline version
Change-Id: Ief04314834b31e27effab435d3ca8ba33b499059
diff --git a/src/kernel/linux/v4.14/drivers/gpio/gpio-mockup.c b/src/kernel/linux/v4.14/drivers/gpio/gpio-mockup.c
new file mode 100644
index 0000000..d99c8d8
--- /dev/null
+++ b/src/kernel/linux/v4.14/drivers/gpio/gpio-mockup.c
@@ -0,0 +1,373 @@
+/*
+ * GPIO Testing Device Driver
+ *
+ * Copyright (C) 2014 Kamlakant Patel <kamlakant.patel@broadcom.com>
+ * Copyright (C) 2015-2016 Bamvor Jian Zhang <bamvor.zhangjian@linaro.org>
+ * Copyright (C) 2017 Bartosz Golaszewski <brgl@bgdev.pl>
+ *
+ * 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/init.h>
+#include <linux/module.h>
+#include <linux/gpio/driver.h>
+#include <linux/gpio/consumer.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/irq_sim.h>
+#include <linux/debugfs.h>
+#include <linux/uaccess.h>
+
+#include "gpiolib.h"
+
+#define GPIO_MOCKUP_NAME "gpio-mockup"
+#define GPIO_MOCKUP_MAX_GC 10
+/*
+ * We're storing two values per chip: the GPIO base and the number
+ * of GPIO lines.
+ */
+#define GPIO_MOCKUP_MAX_RANGES (GPIO_MOCKUP_MAX_GC * 2)
+
+enum {
+ GPIO_MOCKUP_DIR_IN = 0,
+ GPIO_MOCKUP_DIR_OUT = 1,
+};
+
+/*
+ * struct gpio_pin_status - structure describing a GPIO status
+ * @dir: Configures direction of gpio as "in" or "out", 0=in, 1=out
+ * @value: Configures status of the gpio as 0(low) or 1(high)
+ */
+struct gpio_mockup_line_status {
+ int dir;
+ bool value;
+};
+
+struct gpio_mockup_chip {
+ struct gpio_chip gc;
+ struct gpio_mockup_line_status *lines;
+ struct irq_sim irqsim;
+ struct dentry *dbg_dir;
+};
+
+struct gpio_mockup_dbgfs_private {
+ struct gpio_mockup_chip *chip;
+ struct gpio_desc *desc;
+ int offset;
+};
+
+static int gpio_mockup_ranges[GPIO_MOCKUP_MAX_RANGES];
+static int gpio_mockup_params_nr;
+module_param_array(gpio_mockup_ranges, int, &gpio_mockup_params_nr, 0400);
+
+static bool gpio_mockup_named_lines;
+module_param_named(gpio_mockup_named_lines,
+ gpio_mockup_named_lines, bool, 0400);
+
+static const char gpio_mockup_name_start = 'A';
+static struct dentry *gpio_mockup_dbg_dir;
+
+static int gpio_mockup_get(struct gpio_chip *gc, unsigned int offset)
+{
+ struct gpio_mockup_chip *chip = gpiochip_get_data(gc);
+
+ return chip->lines[offset].value;
+}
+
+static void gpio_mockup_set(struct gpio_chip *gc, unsigned int offset,
+ int value)
+{
+ struct gpio_mockup_chip *chip = gpiochip_get_data(gc);
+
+ chip->lines[offset].value = !!value;
+}
+
+static int gpio_mockup_dirout(struct gpio_chip *gc, unsigned int offset,
+ int value)
+{
+ struct gpio_mockup_chip *chip = gpiochip_get_data(gc);
+
+ gpio_mockup_set(gc, offset, value);
+ chip->lines[offset].dir = GPIO_MOCKUP_DIR_OUT;
+
+ return 0;
+}
+
+static int gpio_mockup_dirin(struct gpio_chip *gc, unsigned int offset)
+{
+ struct gpio_mockup_chip *chip = gpiochip_get_data(gc);
+
+ chip->lines[offset].dir = GPIO_MOCKUP_DIR_IN;
+
+ return 0;
+}
+
+static int gpio_mockup_get_direction(struct gpio_chip *gc, unsigned int offset)
+{
+ struct gpio_mockup_chip *chip = gpiochip_get_data(gc);
+
+ return !chip->lines[offset].dir;
+}
+
+static int gpio_mockup_name_lines(struct device *dev,
+ struct gpio_mockup_chip *chip)
+{
+ struct gpio_chip *gc = &chip->gc;
+ char **names;
+ int i;
+
+ names = devm_kcalloc(dev, gc->ngpio, sizeof(char *), GFP_KERNEL);
+ if (!names)
+ return -ENOMEM;
+
+ for (i = 0; i < gc->ngpio; i++) {
+ names[i] = devm_kasprintf(dev, GFP_KERNEL,
+ "%s-%d", gc->label, i);
+ if (!names[i])
+ return -ENOMEM;
+ }
+
+ gc->names = (const char *const *)names;
+
+ return 0;
+}
+
+static int gpio_mockup_to_irq(struct gpio_chip *gc, unsigned int offset)
+{
+ struct gpio_mockup_chip *chip = gpiochip_get_data(gc);
+
+ return irq_sim_irqnum(&chip->irqsim, offset);
+}
+
+static ssize_t gpio_mockup_event_write(struct file *file,
+ const char __user *usr_buf,
+ size_t size, loff_t *ppos)
+{
+ struct gpio_mockup_dbgfs_private *priv;
+ struct gpio_mockup_chip *chip;
+ struct seq_file *sfile;
+ struct gpio_desc *desc;
+ int rv, val;
+
+ rv = kstrtoint_from_user(usr_buf, size, 0, &val);
+ if (rv)
+ return rv;
+ if (val != 0 && val != 1)
+ return -EINVAL;
+
+ sfile = file->private_data;
+ priv = sfile->private;
+ desc = priv->desc;
+ chip = priv->chip;
+
+ gpiod_set_value_cansleep(desc, val);
+ irq_sim_fire(&chip->irqsim, priv->offset);
+
+ return size;
+}
+
+static int gpio_mockup_event_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, NULL, inode->i_private);
+}
+
+static const struct file_operations gpio_mockup_event_ops = {
+ .owner = THIS_MODULE,
+ .open = gpio_mockup_event_open,
+ .write = gpio_mockup_event_write,
+ .llseek = no_llseek,
+};
+
+static void gpio_mockup_debugfs_setup(struct device *dev,
+ struct gpio_mockup_chip *chip)
+{
+ struct gpio_mockup_dbgfs_private *priv;
+ struct dentry *evfile;
+ struct gpio_chip *gc;
+ char *name;
+ int i;
+
+ gc = &chip->gc;
+
+ chip->dbg_dir = debugfs_create_dir(gc->label, gpio_mockup_dbg_dir);
+ if (!chip->dbg_dir)
+ goto err;
+
+ for (i = 0; i < gc->ngpio; i++) {
+ name = devm_kasprintf(dev, GFP_KERNEL, "%d", i);
+ if (!name)
+ goto err;
+
+ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ goto err;
+
+ priv->chip = chip;
+ priv->offset = i;
+ priv->desc = &gc->gpiodev->descs[i];
+
+ evfile = debugfs_create_file(name, 0200, chip->dbg_dir, priv,
+ &gpio_mockup_event_ops);
+ if (!evfile)
+ goto err;
+ }
+
+ return;
+
+err:
+ dev_err(dev, "error creating debugfs directory\n");
+}
+
+static int gpio_mockup_add(struct device *dev,
+ struct gpio_mockup_chip *chip,
+ const char *name, int base, int ngpio)
+{
+ struct gpio_chip *gc = &chip->gc;
+ int ret;
+
+ gc->base = base;
+ gc->ngpio = ngpio;
+ gc->label = name;
+ gc->owner = THIS_MODULE;
+ gc->parent = dev;
+ gc->get = gpio_mockup_get;
+ gc->set = gpio_mockup_set;
+ gc->direction_output = gpio_mockup_dirout;
+ gc->direction_input = gpio_mockup_dirin;
+ gc->get_direction = gpio_mockup_get_direction;
+ gc->to_irq = gpio_mockup_to_irq;
+
+ chip->lines = devm_kcalloc(dev, gc->ngpio,
+ sizeof(*chip->lines), GFP_KERNEL);
+ if (!chip->lines)
+ return -ENOMEM;
+
+ if (gpio_mockup_named_lines) {
+ ret = gpio_mockup_name_lines(dev, chip);
+ if (ret)
+ return ret;
+ }
+
+ ret = devm_irq_sim_init(dev, &chip->irqsim, gc->ngpio);
+ if (ret)
+ return ret;
+
+ ret = devm_gpiochip_add_data(dev, &chip->gc, chip);
+ if (ret)
+ return ret;
+
+ if (gpio_mockup_dbg_dir)
+ gpio_mockup_debugfs_setup(dev, chip);
+
+ return 0;
+}
+
+static int gpio_mockup_probe(struct platform_device *pdev)
+{
+ int ret, i, base, ngpio, num_chips;
+ struct device *dev = &pdev->dev;
+ struct gpio_mockup_chip *chips;
+ char *chip_name;
+
+ if (gpio_mockup_params_nr < 2 || (gpio_mockup_params_nr % 2))
+ return -EINVAL;
+
+ /* Each chip is described by two values. */
+ num_chips = gpio_mockup_params_nr / 2;
+
+ chips = devm_kcalloc(dev, num_chips, sizeof(*chips), GFP_KERNEL);
+ if (!chips)
+ return -ENOMEM;
+
+ platform_set_drvdata(pdev, chips);
+
+ for (i = 0; i < num_chips; i++) {
+ base = gpio_mockup_ranges[i * 2];
+
+ if (base == -1)
+ ngpio = gpio_mockup_ranges[i * 2 + 1];
+ else
+ ngpio = gpio_mockup_ranges[i * 2 + 1] - base;
+
+ if (ngpio >= 0) {
+ chip_name = devm_kasprintf(dev, GFP_KERNEL,
+ "%s-%c", GPIO_MOCKUP_NAME,
+ gpio_mockup_name_start + i);
+ if (!chip_name)
+ return -ENOMEM;
+
+ ret = gpio_mockup_add(dev, &chips[i],
+ chip_name, base, ngpio);
+ } else {
+ ret = -EINVAL;
+ }
+
+ if (ret) {
+ dev_err(dev,
+ "adding gpiochip failed: %d (base: %d, ngpio: %d)\n",
+ ret, base, base < 0 ? ngpio : base + ngpio);
+
+ return ret;
+ }
+ }
+
+ return 0;
+}
+
+static struct platform_driver gpio_mockup_driver = {
+ .driver = {
+ .name = GPIO_MOCKUP_NAME,
+ },
+ .probe = gpio_mockup_probe,
+};
+
+static struct platform_device *pdev;
+static int __init mock_device_init(void)
+{
+ int err;
+
+ gpio_mockup_dbg_dir = debugfs_create_dir("gpio-mockup-event", NULL);
+ if (!gpio_mockup_dbg_dir)
+ pr_err("%s: error creating debugfs directory\n",
+ GPIO_MOCKUP_NAME);
+
+ pdev = platform_device_alloc(GPIO_MOCKUP_NAME, -1);
+ if (!pdev)
+ return -ENOMEM;
+
+ err = platform_device_add(pdev);
+ if (err) {
+ platform_device_put(pdev);
+ return err;
+ }
+
+ err = platform_driver_register(&gpio_mockup_driver);
+ if (err) {
+ platform_device_unregister(pdev);
+ return err;
+ }
+
+ return 0;
+}
+
+static void __exit mock_device_exit(void)
+{
+ debugfs_remove_recursive(gpio_mockup_dbg_dir);
+ platform_driver_unregister(&gpio_mockup_driver);
+ platform_device_unregister(pdev);
+}
+
+module_init(mock_device_init);
+module_exit(mock_device_exit);
+
+MODULE_AUTHOR("Kamlakant Patel <kamlakant.patel@broadcom.com>");
+MODULE_AUTHOR("Bamvor Jian Zhang <bamvor.zhangjian@linaro.org>");
+MODULE_AUTHOR("Bartosz Golaszewski <brgl@bgdev.pl>");
+MODULE_DESCRIPTION("GPIO Testing driver");
+MODULE_LICENSE("GPL v2");