Hi Shawn,

Thanks, that fixes the problem!

Reviewed-by: Igor Opaniuk igor.opaniuk@linaro.org Tested-by: Igor Opaniuk igor.opaniuk@linaro.org On Wed, 12 Dec 2018 at 09:25, Shawn Guo shawn.guo@linaro.org wrote:

Commit 4687919684e0 ("serial: Remove DM_FLAG_PRE_RELOC flag in various drivers") essentially drops flag DM_FLAG_PRE_RELOC from serial_pl01x driver for Poplar platform, because the platform falls into the following strategy category made by the commit.

Surround DM_FLAG_PRE_RELOC flag with OF_CONTROL check, for drivers that support both statically declared devices and configuration from device tree

Before the commit lands, Poplar platform works by statically declaring pl011 serial device via U_BOOT_DEVICE() with DM_FLAG_PRE_RELOC flag set in the driver. But since Poplar also supports device configuration from device tree, the commit practically drops the flag for Poplar, and hence breaks the platform from booting.

This patch changes platform code and device tree to initiate pl011 serial device from device tree rather than static declaration, so that above strategy about DM_FLAG_PRE_RELOC applies to Poplar, and therefore the reported boot failure gets fixed.

Reported-by: Igor Opaniuk igor.opaniuk@linaro.org Fixes: 4687919684e0 ("serial: Remove DM_FLAG_PRE_RELOC flag in various drivers") Cc: Bin Meng bmeng.cn@gmail.com Cc: Simon Glass sjg@chromium.org Signed-off-by: Shawn Guo shawn.guo@linaro.org

---

arch/arm/dts/hi3798cv200-u-boot.dtsi | 10 ++-------- board/hisilicon/poplar/poplar.c | 2 ++ 2 files changed, 4 insertions(+), 8 deletions(-)

diff --git a/arch/arm/dts/hi3798cv200-u-boot.dtsi b/arch/arm/dts/hi3798cv200-u-boot.dtsi index 709ae1cbc9f3..7844c5208c5d 100644 --- a/arch/arm/dts/hi3798cv200-u-boot.dtsi +++ b/arch/arm/dts/hi3798cv200-u-boot.dtsi @@ -17,12 +17,6 @@ };

&uart0 {

•   status = "disabled";
  

•   clock = <75000000>;
  

•   status = "okay";
  

};

-/{

•   chosen {
  

•           stdout-path = "";
  

•   };
  

-};

diff --git a/board/hisilicon/poplar/poplar.c b/board/hisilicon/poplar/poplar.c index 9e8eac78388b..8adc750962a1 100644 --- a/board/hisilicon/poplar/poplar.c +++ b/board/hisilicon/poplar/poplar.c @@ -35,6 +35,7 @@ static struct mm_region poplar_mem_map[] = {

struct mm_region *mem_map = poplar_mem_map;

+#if !CONFIG_IS_ENABLED(OF_CONTROL) static const struct pl01x_serial_platdata serial_platdata = { .base = REG_BASE_UART0, .type = TYPE_PL010, @@ -45,6 +46,7 @@ U_BOOT_DEVICE(poplar_serial) = { .name = "serial_pl01x", .platdata = &serial_platdata, }; +#endif

int checkboard(void) { -- 2.18.0