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标题: RV1103 sensor上电 pwdn不能拉高和拉低 [打印本页]

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作者: wenjie    时间: 2024-9-11 18:48
标题: RV1103 sensor上电 pwdn不能拉高和拉低
我们在点亮新camera sensor时，配置了avdd dvdd clk；但是pwdn配置时，发现不能正常操作，使用万用表测量pwdn引脚没有电压。
下面是给sensor上电的代码

1. static int __sc3336_power_on(struct sc3336 *sc3336)
   
2. {
   
3.         int ret;
   
4.         u32 delay_us;
   
5.         struct device *dev = &sc3336->client->dev;
   
6. 
   
7.         if (!IS_ERR_OR_NULL(sc3336->pins_default)) {
   
8.                 ret = pinctrl_select_state(sc3336->pinctrl,
   
9.                                            sc3336->pins_default);
   
10.                 if (ret < 0)
    
11.                         dev_err(dev, "could not set pins\n");
    
12.         }
    
13.         #if 1
    
14.         ret = clk_set_rate(sc3336->xvclk, sc3336->cur_mode->xvclk_freq);
    
15.         if (ret < 0)
    
16.                 dev_warn(dev, "Failed to set xvclk rate (%dHz)\n", sc3336->cur_mode->xvclk_freq);
    
17.         if (clk_get_rate(sc3336->xvclk) != sc3336->cur_mode->xvclk_freq)
    
18.                 dev_warn(dev, "xvclk mismatched, modes are based on %dHz\n",
    
19.                          sc3336->cur_mode->xvclk_freq);
    
20.         ret = clk_prepare_enable(sc3336->xvclk);
    
21.         if (ret < 0) {
    
22.                 dev_err(dev, "Failed to enable xvclk\n");
    
23.                 return ret;
    
24.         }
    
25.         #endif
    
26.         if (sc3336->is_thunderboot)
    
27.                 return 0;
    
28.         #if 0
    
29.         if (!IS_ERR(sc3336->reset_gpio))
    
30.                 gpiod_set_value_cansleep(sc3336->reset_gpio, 0);
    
31.         #endif
    
32.         usleep_range(50, 100);
    
33. 
    
34.         ret = regulator_bulk_enable(SC3336_NUM_SUPPLIES, sc3336->supplies);
    
35.         if (ret < 0) {
    
36.                 dev_err(dev, "Failed to enable regulators\n");
    
37.                 goto disable_clk;
    
38.         }
    
39.         #if 0
    
40.         if (!IS_ERR(sc3336->reset_gpio))
    
41.                 gpiod_set_value_cansleep(sc3336->reset_gpio, 1);
    
42.         #endif
    
43.         usleep_range(50, 100);
    
44. #if 1
    
45.         if (!IS_ERR(sc3336->pwdn_gpio))
    
46.         {
    
47.                 gpiod_set_value_cansleep(sc3336->pwdn_gpio, 0);
    
48.                 printk("WENJIE sc3336->pwdn_gpio set 0\n");
    
49.         }
    
50. #endif
    
51.         if (!IS_ERR(sc3336->reset_gpio))
    
52.                 usleep_range(6000, 8000);
    
53.         else
    
54.                 usleep_range(12000, 16000);
    
55. #if 1
    
56.         if (!IS_ERR(sc3336->pwdn_gpio))
    
57.         {
    
58.                 gpiod_set_value_cansleep(sc3336->pwdn_gpio, 1);
    
59.                 printk("WENJIE sc3336->pwdn_gpio set 1\n");
    
60.         }
    
61. #endif
    
62.         if (!IS_ERR(sc3336->pwdn_gpio))
    
63.         {
    
64.                 gpiod_set_value_cansleep(sc3336->pwdn_gpio, 0);
    
65.                 printk("WENJIE sc3336->pwdn_gpio set 0\n");
    
66.         }
    
67.         /* 8192 cycles prior to first SCCB transaction */
    
68.         delay_us = sc3336_cal_delay(8192, sc3336);
    
69.         usleep_range(delay_us, delay_us * 2);
    
70. 
    
71.         return 0;
    
72. 
    
73. disable_clk:
    
74.         clk_disable_unprepare(sc3336->xvclk);
    
75. 
    
76.         return ret;
    
77. }

复制代码帮忙分析一下，应该如何正确的配置pwdn
上电时序图如附件所示，
设备树代码节选如下所示，配置了gpio1_c7为高电平，但是测量不到电压

1. &i2c4 {
   
2. 
   
3. status = "okay";
   
4. 
   
5. clock-frequency = <40000>;
   
6. 
   
7. pinctrl-names = "default";
   
8. 
   
9. pinctrl-0 = <&i2c4m2_xfer>;
   
10. 
    
11. 
    
12. 
    
13. sc3336: sc3336@21 {
    
14. 
    
15. compatible = "smartsens,sc3336";
    
16. 
    
17. status = "okay";
    
18. 
    
19. reg = <0x21>;
    
20. 
    
21. clocks = <&cru MCLK_REF_MIPI0>;
    
22. 
    
23. clock-names = "xvclk";
    
24. 
    
25. pwdn-gpios = <&gpio1 RK_PC7 1>;
    
26. 
    
27. pinctrl-names = "default";
    
28. 
    
29. pinctrl-0 = <&mipi_refclk_out0>;
    
30. 
    
31. rockchip,camera-module-index = <0>;
    
32. 
    
33. rockchip,camera-module-facing = "back";
    
34. 
    
35. rockchip,camera-module-name = "CMK-OT2119-PC1";
    
36. 
    
37. rockchip,camera-module-lens-name = "30IRC-F16";
    
38. 
    
39. port {
    
40. 
    
41. sc3336_out: endpoint {
    
42. 
    
43. remote-endpoint = <&csi_dphy_input0>;
    
44. 
    
45. data-lanes = <1 2>;
    
46. 
    
47. };
    
48. 
    
49. };
    
50. 
    
51. };};
    
52. 
    
53. &pinctrl {spi0 {spi0m0_clk: spi0m0-clk {rockchip,pins = <1 RK_PC1 4 &pcfg_pull_none>;};spi0m0_mosi: spi0m0-mosi {rockchip,pins = <1 RK_PC2 6 &pcfg_pull_none>;};spi0m0_miso: spi0m0-miso {rockchip,pins = <1 RK_PC3 6 &pcfg_pull_none>;};spi0m0_cs0: spi0m0-cs0 {rockchip,pins = <1 RK_PC0 4 &pcfg_pull_none>;};};
    
54. 
    
55.     gpio1-pc7 {        gpio1_pc7:gpio1-pc7 {            rockchip,pins = <1 RK_PC7 RK_FUNC_GPIO &pcfg_pull_none>;    };};};
    
56. 
    
57. 
    
58. 
    
59. 
    
60. 
    

复制代码

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