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#include <linux/device.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/wait.h>
#include <linux/types.h>
#include <linux/device.h>
#include <linux/gpio.h>
#include <linux/of.h>
#include <linux/of_gpio.h>
#include <linux/of_address.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
#include <linux/poll.h>
#include <linux/slab.h>
struct simtray_data {
struct device *dev;
int status_gpio;
};
static ssize_t simtray_status_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct simtray_data *data = dev_get_drvdata(dev);
return scnprintf(buf, PAGE_SIZE, "%d\n", gpio_get_value(data->status_gpio));
}
static DEVICE_ATTR(status, 0444, simtray_status_show, NULL);
static int simtray_probe(struct platform_device *pdev)
{
int ret = 0;
struct device *dev = &pdev->dev;
struct device_node *np = dev->of_node;
struct simtray_data *data;
pr_info("%s enter\n", __func__);
data = devm_kzalloc(dev, sizeof(struct simtray_data), GFP_KERNEL);
if (!data)
return -ENOMEM;
data->status_gpio = of_get_named_gpio(np, "status-gpio", 0);
if (data->status_gpio < 0)
return -EINVAL;
ret = sysfs_create_file(&dev->kobj, &dev_attr_status.attr);
if (ret < 0) {
dev_err(dev, "Failed to create sysfs node.\n");
return -EINVAL;
}
data->dev = dev;
platform_set_drvdata(pdev, data);
return ret;
}
static int simtray_remove(struct platform_device *pdev)
{
sysfs_remove_file(&pdev->dev.kobj, &dev_attr_status.attr);
return 0;
}
static const struct of_device_id simtray_of_match[] = {
{ .compatible = "xiaomi,simtray-status", },
{},
};
static struct platform_driver simtray_status_driver = {
.driver = {
.name = "simtray-status",
.owner = THIS_MODULE,
.of_match_table = of_match_ptr(simtray_of_match),
},
.probe = simtray_probe,
.remove = simtray_remove,
};
module_platform_driver(simtray_status_driver);
MODULE_AUTHOR("Tao Jun<taojun@xiaomi.com>");
MODULE_DESCRIPTION("Xiaomi SIM tray status");
MODULE_LICENSE("GPL");
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