diff options
| author | lyx <lyx@rock-chips.com> | 2011-06-01 00:33:09 -0700 |
|---|---|---|
| committer | lyx <lyx@rock-chips.com> | 2011-06-01 18:47:40 -0700 |
| commit | 1b9ac442969c6b1311f7fea188fbc90a3b0480ab (patch) | |
| tree | 32446e6306e7c476ff25ef75531179d75f5a3a2e /drivers/testcode | |
| parent | 085ccecf9bb80c31692db8f0c8762633ca1694a6 (diff) | |
add some auto test code, maybe useful for someone
Diffstat (limited to 'drivers/testcode')
| -rwxr-xr-x | drivers/testcode/Kconfig | 16 | ||||
| -rwxr-xr-x | drivers/testcode/Makefile | 7 | ||||
| -rwxr-xr-x | drivers/testcode/gpio_wave.c | 108 | ||||
| -rwxr-xr-x | drivers/testcode/gpio_wave.h | 11 |
4 files changed, 142 insertions, 0 deletions
diff --git a/drivers/testcode/Kconfig b/drivers/testcode/Kconfig new file mode 100755 index 000000000000..e3a89d7c734c --- /dev/null +++ b/drivers/testcode/Kconfig @@ -0,0 +1,16 @@ +# +# Input misc drivers configuration +# +menuconfig TEST_CODE + bool "some test code for kernel" + help + Say Y here, and a list of test code will be displayed. + + If unsure, say N. + +if TEST_CODE + +config USE_GPIO_GENERATE_WAVE + tristate "use gpio to generate square wave" + +endif diff --git a/drivers/testcode/Makefile b/drivers/testcode/Makefile new file mode 100755 index 000000000000..fa7569c07fe5 --- /dev/null +++ b/drivers/testcode/Makefile @@ -0,0 +1,7 @@ +# +# Makefile for the test code drivers. +# + +# Each configuration option enables a list of files. + +obj-$(CONFIG_USE_GPIO_GENERATE_WAVE) += gpio_wave.o diff --git a/drivers/testcode/gpio_wave.c b/drivers/testcode/gpio_wave.c new file mode 100755 index 000000000000..9e3bae87fd7b --- /dev/null +++ b/drivers/testcode/gpio_wave.c @@ -0,0 +1,108 @@ +#include <linux/delay.h>
+#include <linux/platform_device.h>
+#include <linux/clk.h>
+#include <mach/gpio.h>
+#include <linux/wakelock.h>
+
+#include "gpio_wave.h"
+
+struct wave_data {
+ struct delayed_work d_work;
+ int Htime;
+ int Ltime;
+ unsigned int gpio;
+ int cur_value;
+ int last_value;
+ struct device *dev;
+};
+
+static struct wake_lock w_lock;
+
+static void gpio_wave_dwork_handle(struct work_struct *work)
+{
+ struct wave_data *data = (struct wave_data *)container_of(work, struct wave_data, d_work.work);
+
+ int delay_time = data->cur_value ? data->Ltime : data->Htime;
+ data->cur_value = !data->cur_value;
+ gpio_set_value(data->gpio, data->cur_value);
+ schedule_delayed_work(&(data->d_work), msecs_to_jiffies(delay_time));
+}
+
+
+static int gpio_wave_probe(struct platform_device *pdev)
+{
+ int ret;
+ struct wave_data *data;
+ struct gpio_wave_platform_data *pdata = pdev->dev.platform_data;
+
+ data = kmalloc(sizeof(struct wave_data), GFP_KERNEL);
+ if (!data) {
+ printk("func %s, line %d, malloc fail\n", __func__, __LINE__);
+ return -ENOMEM;
+ }
+
+ data->dev = &pdev->dev;
+ platform_set_drvdata(pdev, data);
+
+ if (pdata) {
+ int dtime = pdata->Dvalue ? pdata->Htime : pdata->Ltime;
+ data->gpio = pdata->gpio;
+ data->cur_value = pdata->Dvalue;
+ data->last_value = pdata->Dvalue;
+ data->Htime = pdata->Htime;
+ data->Ltime = pdata->Ltime;
+
+ ret = gpio_request(data->gpio, NULL);
+ if (ret) {
+ printk("func %s, line %d, gpio request err\n", __func__, __LINE__);
+ return ret;
+ }
+ gpio_direction_output(data->gpio, data->cur_value);
+ gpio_set_value(data->gpio, data->cur_value);
+ wake_lock_init(&w_lock, WAKE_LOCK_SUSPEND, "gpio_wave");
+ INIT_DELAYED_WORK(&(data->d_work), gpio_wave_dwork_handle);
+ wake_lock(&w_lock);
+ schedule_delayed_work(&(data->d_work), msecs_to_jiffies(dtime));
+ }
+ else {
+ kfree(data);
+ }
+
+ return 0;
+}
+
+static int gpio_wave_remove(struct platform_device *pdev)
+{
+ struct wave_data *data = platform_get_drvdata(pdev);
+ gpio_free(data->gpio);
+ kfree(data);
+ return 0;
+}
+
+static struct platform_driver gpio_wave_driver = {
+ .probe = gpio_wave_probe,
+ .remove = gpio_wave_remove,
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = "gpio_wave",
+ },
+};
+
+static int __init gpio_wave_init(void)
+{
+ return platform_driver_register(&gpio_wave_driver);
+}
+
+static void __exit gpio_wave_exit(void)
+{
+ platform_driver_unregister(&gpio_wave_driver);
+}
+
+
+module_init(gpio_wave_init);
+module_exit(gpio_wave_exit);
+
+MODULE_DESCRIPTION("Driver for gpio wave");
+MODULE_AUTHOR("lyx, lyx@rock-chips.com");
+MODULE_LICENSE("GPL");
+
diff --git a/drivers/testcode/gpio_wave.h b/drivers/testcode/gpio_wave.h new file mode 100755 index 000000000000..592cfba8a641 --- /dev/null +++ b/drivers/testcode/gpio_wave.h @@ -0,0 +1,11 @@ +#ifndef __GPIO_PWM_H__ +#define __GPIO_PWM_H__ + +struct gpio_wave_platform_data { + unsigned int gpio; //the pin use to exert spuare wave + int Htime; //spuare wave Hight width + int Ltime; //spuare wave Low width + int Dvalue; //gpio default value +}; + +#endif |