固件类型：自行编译的固件
SDK包名称：Firefly-RK356X_Android11.0_git_20210824
SDK修改内容：在 I2C3M1 和 I2C1M0 添加 PCA9555 驱动。
Log日志：rk3568.log
- 查看 PCA9555 内核打印信息，如下所示
[ 0.793534] rk808-rtc rk808-rtc: device is disabled
[ 0.793558] rk808-rtc: probe of rk808-rtc failed with error -22
[ 0.794717] pca953x 1-0021: 1-0021 supply vcc not found, using dummy regulator
[ 0.794803] pca953x 1-0021: Linked as a consumer to regulator.0
[ 0.795453] pca9555 init success!
[ 0.795603] pca953x 1-0022: 1-0022 supply vcc not found, using dummy regulator
[ 0.795656] pca953x 1-0022: Linked as a consumer to regulator.0
[ 0.796284] pca9555 init success!
[ 0.796894] pca953x 3-0021: 3-0021 supply vcc not found, using dummy regulator
[ 0.796952] pca953x 3-0021: Linked as a consumer to regulator.0
[ 0.797589] pca9555 init success!
[ 0.797732] pca953x 3-0022: 3-0022 supply vcc not found, using dummy regulator
[ 0.797778] pca953x 3-0022: Linked as a consumer to regulator.0
[ 0.798407] pca9555 init success!
[ 0.798544] pca953x 3-0024: 3-0024 supply vcc not found, using dummy regulator
[ 0.798601] pca953x 3-0024: Linked as a consumer to regulator.0
[ 0.799223] pca9555 init success! - 查看内核 GPIO 口，如下图
[i]3. 使用I2CTool 能够正常控制PCA9555 IO 口。
4. 发现注册在 I2C3 的 PCA9555 驱动。无法正常申请GPIO
:/sys/class/gpio # echo 600 > export
1
该问题如何解决，谢谢。
[/i]
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rk3568.log (94.2 KB)