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[RK3399]电磁屏：优派ViewSonic+ PCA9534

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Platform: ROCKCHIP
Chip: RK3399
OS: Android7.1.2
Kernel: 4.4.126

调试步骤

1.增加驱动，Viewsonic_I2C_Driver.c

2.PCA9534芯片驱动配置与扩展

复制代码 
    --- a/kernel/arch/arm64/configs/rockchip_defconfig
    +++ b/kernel/arch/arm64/configs/rockchip_defconfig
    @@ -809,3 +809,6 @@ CONFIG_CRYPTO_GHASH_ARM64_CE=y
     CONFIG_CRYPTO_AES_ARM64_CE_CCM=y
     CONFIG_CRYPTO_AES_ARM64_CE_BLK=y
     CONFIG_CRYPTO_CRC32_ARM64=y
    +CONFIG_GPIO_PCA953X=y
    +CONFIG_GPIO_PCA953X_IRQ=y
    +CONFIG_TOUCHSCREEN_VIEWSONIC=y
    \ No newline at end of file
    diff --git a/kernel/drivers/input/touchscre

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