[NXP i.MX 應用處理器教室] 如何將全新量產的電源管理芯片"PCA9450A" 運用於"i.MX8M Mini"的應用處理器[軟體驅動篇]

NXP開發出相對應的"電源管理芯片PCA9450A"來提供電源給i.MX8M Mini。在成本，電源，功耗上更有優勢。在硬體線路線，我們提供相對應的修改參考線路之外，另外也要搭配相對軟件驅動。

以下為軟件驅動的補丁:
I.  uboot‐imx
    1. In the “./drivers/power/pmic/” directory
             A. copy pca9450.c and pmic_pca9450.c of uboot-pca9450.zip.
             B. modify Kconfig to add pca9450
                 
              C. modify Makefile to add pca9450
                                  
     2. In the “./include/power/” directory
            A. copy pca9450.h of uboot-pca9450.zip.
     3. In the “./include/configs/” directory
           A. Modify imx8mm_evk.h to remove bd71837 and add pca9450
                        
    4. In the “./arch/arm/dts/” directory.
           A. Change to fsl-imx8mm-evk.dts of uboot-pca9450.zip.
    5. modify initial code of spl.c to replace bd71837 code with pca9450.
                
                 If use “imx8mm_evk” directory,
                 
                 Or if use “imx8mm_val” directory,

                

II.   linux‐imx
     1. In the “./drivers/regulator/” directory
           A. copy pca9450-regulator.c of linux-imx8mm-pca9450.zip.
           B. modify Kconfig to add pca9450
                
          C. modify Makefile to add pca9450
                 
   2. In the “./drivers/mfd/” directory
        A. copy pca9450.c of linux-imx8mm-pca9450.zip.
        B. modify Kconfig to add pca9450
               
       C. modify Makefile to add pca9450
             
   3. In the “./include/linux/mfd/” directory
        A. copy pca9450.h of limux-imx
   4. In the “./arch/arm64/configs/” directory
       A. Modify defconfig to remove bd71837 and add pca9450
             

   5. In the “./arch/arm64/boot/dts/freescale/” directory.
        A. Change to fsl-imx8mm-evk.dts of linux-imx8mm-pca9450.zip