Difference between revisions of "FAQ"

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= How to select board config =
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== How to select board config ==
  
 
DDR:
 
DDR:
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PMIC:
 
PMIC:
  
PMIC setting usually is just important in kernel,  but for the board using rk818, [https://github.com/rockchip-linux/u-boot/blob/release/arch/arm/mach-rockchip/rk3288-board-spl.c#L172 USB input current] should be configured during boot stage.
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PMIC setting usually doesn't matter in u-boot,  but for the board with rk818, [https://github.com/rockchip-linux/u-boot/blob/release/arch/arm/mach-rockchip/rk3288-board-spl.c#L172 USB input current] should be configured before enter u-boot.
  
 
Boot:
 
Boot:
  
Please note some board have disable emmc in u-boot though the hardware actually have emmc. (firefly-rk3288)
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Some board have disable emmc in u-boot for convenience, though the hardware actually have emmc, please note it. (firefly-rk3288)
 
 
 
 
 
 
= ''Last'' =
 

Latest revision as of 07:42, 11 October 2017




How to select board config

DDR:

We use opensource idbloader(See Boot_option)  on some chips (rk3036, rk3288) and its dmc driver can't support ddr-type autodetct, so the wrong ddr dts settings will make the board failed to enter u-boot.

PMIC:

PMIC setting usually doesn't matter in u-boot,  but for the board with rk818, USB input current should be configured before enter u-boot.

Boot:

Some board have disable emmc in u-boot for convenience, though the hardware actually have emmc, please note it. (firefly-rk3288)