IMX6Q RTC驱动分析

 1 extern const struct imx_snvs_rtc_data imx6q_imx_snvs_rtc_data __initconst;
 2 #define imx6q_add_imx_snvs_rtc()  3  imx_add_snvs_rtc(&imx6q_imx_snvs_rtc_data)
 4 
 5 #define imx_snvs_rtc_data_entry_single(soc)     6  {         7   .iobase = soc ## _SNVS_BASE_ADDR,    8   .irq = soc ## _INT_SNVS,     9  }
10 
11 #ifdef CONFIG_SOC_IMX6Q
12 const struct imx_snvs_rtc_data imx6q_imx_snvs_rtc_data __initconst =
13  imx_snvs_rtc_data_entry_single(MX6Q);
14 #endif /* ifdef CONFIG_SOC_IMX6Q */
15 
16 struct platform_device *__init imx_add_snvs_rtc(
17   const struct imx_snvs_rtc_data *data)
18 {
19  struct resource res[] = {
20   {
21    .start = data->iobase,
22    .end = data->iobase + SZ_4K - 1,
23    .flags = IORESOURCE_MEM,
24   }, {
25    .start = data->irq,
26    .end = data->irq,
27    .flags = IORESOURCE_IRQ,
28   },
29  };
30 
31  return imx_add_platform_device("snvs_rtc", 0,
32    res, ARRAY_SIZE(res), NULL, 0);
33 }

 1 /*!
 2  * The RTC driver structure
 3  */
 4 static struct rtc_class_ops snvs_rtc_ops = {
 5     .open = snvs_rtc_open,
 6     .release = snvs_rtc_release,
 7     .read_time = snvs_rtc_read_time,
 8     .set_time = snvs_rtc_set_time,
 9     .read_alarm = snvs_rtc_read_alarm,
10     .set_alarm = snvs_rtc_set_alarm,
11     .proc = snvs_rtc_proc,
12     .ioctl = snvs_rtc_ioctl,
13     .alarm_irq_enable = snvs_rtc_alarm_irq_enable,
14 };

 1 /*!
 2  * Contains pointers to the power management callback functions.
 3  */
 4 static struct platform_driver snvs_rtc_driver = {
 5     .driver = {
 6            .name = "snvs_rtc",     //注意这个要和device端名字一样
 7            },
 8     .probe = snvs_rtc_probe,
 9     .remove = __exit_p(snvs_rtc_remove),
10     .suspend = snvs_rtc_suspend,
11     .resume = snvs_rtc_resume,
12 };

 1 static int __exit snvs_rtc_remove(struct platform_device *pdev)
 2 {
 3     struct rtc_drv_data *pdata = platform_get_drvdata(pdev);
 4     rtc_device_unregister(pdata->rtc);
 5     if (pdata->irq >= 0)
 6         free_irq(pdata->irq, pdev);
 7 
 8     kfree(pdata);
 9     return 0;
10 }

 1 /*!
 2  * Contains pointers to the power management callback functions.
 3  */
 4 static struct platform_driver snvs_rtc_driver = {
 5     .driver = {
 6            .name = "snvs_rtc",
 7            },
 8     .probe = snvs_rtc_probe,
 9     .remove = __exit_p(snvs_rtc_remove),
10     .suspend = snvs_rtc_suspend,
11     .resume = snvs_rtc_resume,
12 };
13 
14 /*!
15  * This function creates the /proc/driver/rtc file and registers the device RTC
16  * in the /dev/misc directory. It also reads the RTC value from external source
17  * and setup the internal RTC properly.
18  *
19  * @return  -1 if RTC is failed to initialize; 0 is successful.
20  */
21 static int __init snvs_rtc_init(void)
22 {
23     return platform_driver_register(&snvs_rtc_driver);
24 }
25 
26 /*!
27  * This function removes the /proc/driver/rtc file and un-registers the
28  * device RTC from the /dev/misc directory.
29  */
30 static void __exit snvs_rtc_exit(void)
31 {
32     platform_driver_unregister(&snvs_rtc_driver);
33 
34 }

 1 static struct imxi2c_platform_data mx6q_sabresd_i2c_data = {
 2     .bitrate = 100000,
 3 };
 4 
 5 static struct i2c_board_info mxc_i2c0_board_info[] __initdata = {
 6 {
 7         I2C_BOARD_INFO("wm89**", 0x1a),
 8     },
 9     {
10         I2C_BOARD_INFO("ov564x", 0x3c),
11         .platform_data = (void *)&camera_data,
12     },
13     {
14         I2C_BOARD_INFO("mma8451", 0x1c),
15         .platform_data = (void *)&mma8451_position,
16     },
17     {
18         I2C_BOARD_INFO("isl1208", 0x6f),
19     },
20 
21 };