DT kernel with latest of denx SPL U-boot boots with garbled UART logs. This is because in U-boot UART2 gets sourced by PLL0_SYSCLK2 configured for 150MHz. But later in kernel UART2 gets mapped to PLL1_SYSCLK2 and is configured for 132MHz not for 150MHz.
PLL1 is configured for 264MHz to support mDDR on the EVM. That is memory controller driving mDDR can be configured for 150MHz and mDDR it self can operate at 132MHz. So override UART1 and UART2 DT node clock-frequency property with rate available on da850 EVM. Signed-off-by: Manjunathappa, Prakash <[email protected]> --- arch/arm/boot/dts/da850-evm.dts | 2 ++ 1 files changed, 2 insertions(+), 0 deletions(-) diff --git a/arch/arm/boot/dts/da850-evm.dts b/arch/arm/boot/dts/da850-evm.dts index f712fb6..c359872 100644 --- a/arch/arm/boot/dts/da850-evm.dts +++ b/arch/arm/boot/dts/da850-evm.dts @@ -22,9 +22,11 @@ status = "okay"; }; serial1: serial@1d0c000 { + clock-frequency = <132000000>; status = "okay"; }; serial2: serial@1d0d000 { + clock-frequency = <132000000>; status = "okay"; }; rtc0: rtc@1c23000 { -- 1.7.4.1 _______________________________________________ devicetree-discuss mailing list [email protected] https://lists.ozlabs.org/listinfo/devicetree-discuss
