[Feature]add MT2731_MP2_MR2_SVN388 baseline version
Change-Id: Ief04314834b31e27effab435d3ca8ba33b499059
diff --git a/src/kernel/linux/v4.14/drivers/w1/masters/w1-gpio.c b/src/kernel/linux/v4.14/drivers/w1/masters/w1-gpio.c
new file mode 100644
index 0000000..a90728c
--- /dev/null
+++ b/src/kernel/linux/v4.14/drivers/w1/masters/w1-gpio.c
@@ -0,0 +1,236 @@
+/*
+ * w1-gpio - GPIO w1 bus master driver
+ *
+ * Copyright (C) 2007 Ville Syrjala <syrjala@sci.fi>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation.
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/w1-gpio.h>
+#include <linux/gpio.h>
+#include <linux/of_platform.h>
+#include <linux/of_gpio.h>
+#include <linux/err.h>
+#include <linux/of.h>
+#include <linux/delay.h>
+
+#include <linux/w1.h>
+
+static u8 w1_gpio_set_pullup(void *data, int delay)
+{
+ struct w1_gpio_platform_data *pdata = data;
+
+ if (delay) {
+ pdata->pullup_duration = delay;
+ } else {
+ if (pdata->pullup_duration) {
+ gpio_direction_output(pdata->pin, 1);
+
+ msleep(pdata->pullup_duration);
+
+ gpio_direction_input(pdata->pin);
+ }
+ pdata->pullup_duration = 0;
+ }
+
+ return 0;
+}
+
+static void w1_gpio_write_bit_dir(void *data, u8 bit)
+{
+ struct w1_gpio_platform_data *pdata = data;
+
+ if (bit)
+ gpio_direction_input(pdata->pin);
+ else
+ gpio_direction_output(pdata->pin, 0);
+}
+
+static void w1_gpio_write_bit_val(void *data, u8 bit)
+{
+ struct w1_gpio_platform_data *pdata = data;
+
+ gpio_set_value(pdata->pin, bit);
+}
+
+static u8 w1_gpio_read_bit(void *data)
+{
+ struct w1_gpio_platform_data *pdata = data;
+
+ return gpio_get_value(pdata->pin) ? 1 : 0;
+}
+
+#if defined(CONFIG_OF)
+static const struct of_device_id w1_gpio_dt_ids[] = {
+ { .compatible = "w1-gpio" },
+ {}
+};
+MODULE_DEVICE_TABLE(of, w1_gpio_dt_ids);
+#endif
+
+static int w1_gpio_probe_dt(struct platform_device *pdev)
+{
+ struct w1_gpio_platform_data *pdata = dev_get_platdata(&pdev->dev);
+ struct device_node *np = pdev->dev.of_node;
+ int gpio;
+
+ pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
+ if (!pdata)
+ return -ENOMEM;
+
+ if (of_get_property(np, "linux,open-drain", NULL))
+ pdata->is_open_drain = 1;
+
+ gpio = of_get_gpio(np, 0);
+ if (gpio < 0) {
+ if (gpio != -EPROBE_DEFER)
+ dev_err(&pdev->dev,
+ "Failed to parse gpio property for data pin (%d)\n",
+ gpio);
+
+ return gpio;
+ }
+ pdata->pin = gpio;
+
+ gpio = of_get_gpio(np, 1);
+ if (gpio == -EPROBE_DEFER)
+ return gpio;
+ /* ignore other errors as the pullup gpio is optional */
+ pdata->ext_pullup_enable_pin = gpio;
+
+ pdev->dev.platform_data = pdata;
+
+ return 0;
+}
+
+static int w1_gpio_probe(struct platform_device *pdev)
+{
+ struct w1_bus_master *master;
+ struct w1_gpio_platform_data *pdata;
+ int err;
+
+ if (of_have_populated_dt()) {
+ err = w1_gpio_probe_dt(pdev);
+ if (err < 0)
+ return err;
+ }
+
+ pdata = dev_get_platdata(&pdev->dev);
+
+ if (!pdata) {
+ dev_err(&pdev->dev, "No configuration data\n");
+ return -ENXIO;
+ }
+
+ master = devm_kzalloc(&pdev->dev, sizeof(struct w1_bus_master),
+ GFP_KERNEL);
+ if (!master) {
+ dev_err(&pdev->dev, "Out of memory\n");
+ return -ENOMEM;
+ }
+
+ err = devm_gpio_request(&pdev->dev, pdata->pin, "w1");
+ if (err) {
+ dev_err(&pdev->dev, "gpio_request (pin) failed\n");
+ return err;
+ }
+
+ if (gpio_is_valid(pdata->ext_pullup_enable_pin)) {
+ err = devm_gpio_request_one(&pdev->dev,
+ pdata->ext_pullup_enable_pin, GPIOF_INIT_LOW,
+ "w1 pullup");
+ if (err < 0) {
+ dev_err(&pdev->dev, "gpio_request_one "
+ "(ext_pullup_enable_pin) failed\n");
+ return err;
+ }
+ }
+
+ master->data = pdata;
+ master->read_bit = w1_gpio_read_bit;
+
+ if (pdata->is_open_drain) {
+ gpio_direction_output(pdata->pin, 1);
+ master->write_bit = w1_gpio_write_bit_val;
+ } else {
+ gpio_direction_input(pdata->pin);
+ master->write_bit = w1_gpio_write_bit_dir;
+ master->set_pullup = w1_gpio_set_pullup;
+ }
+
+ err = w1_add_master_device(master);
+ if (err) {
+ dev_err(&pdev->dev, "w1_add_master device failed\n");
+ return err;
+ }
+
+ if (pdata->enable_external_pullup)
+ pdata->enable_external_pullup(1);
+
+ if (gpio_is_valid(pdata->ext_pullup_enable_pin))
+ gpio_set_value(pdata->ext_pullup_enable_pin, 1);
+
+ platform_set_drvdata(pdev, master);
+
+ return 0;
+}
+
+static int w1_gpio_remove(struct platform_device *pdev)
+{
+ struct w1_bus_master *master = platform_get_drvdata(pdev);
+ struct w1_gpio_platform_data *pdata = dev_get_platdata(&pdev->dev);
+
+ if (pdata->enable_external_pullup)
+ pdata->enable_external_pullup(0);
+
+ if (gpio_is_valid(pdata->ext_pullup_enable_pin))
+ gpio_set_value(pdata->ext_pullup_enable_pin, 0);
+
+ w1_remove_master_device(master);
+
+ return 0;
+}
+
+static int __maybe_unused w1_gpio_suspend(struct device *dev)
+{
+ struct w1_gpio_platform_data *pdata = dev_get_platdata(dev);
+
+ if (pdata->enable_external_pullup)
+ pdata->enable_external_pullup(0);
+
+ return 0;
+}
+
+static int __maybe_unused w1_gpio_resume(struct device *dev)
+{
+ struct w1_gpio_platform_data *pdata = dev_get_platdata(dev);
+
+ if (pdata->enable_external_pullup)
+ pdata->enable_external_pullup(1);
+
+ return 0;
+}
+
+static SIMPLE_DEV_PM_OPS(w1_gpio_pm_ops, w1_gpio_suspend, w1_gpio_resume);
+
+static struct platform_driver w1_gpio_driver = {
+ .driver = {
+ .name = "w1-gpio",
+ .pm = &w1_gpio_pm_ops,
+ .of_match_table = of_match_ptr(w1_gpio_dt_ids),
+ },
+ .probe = w1_gpio_probe,
+ .remove = w1_gpio_remove,
+};
+
+module_platform_driver(w1_gpio_driver);
+
+MODULE_DESCRIPTION("GPIO w1 bus master driver");
+MODULE_AUTHOR("Ville Syrjala <syrjala@sci.fi>");
+MODULE_LICENSE("GPL");