[PATCH 2/4] rockchip: rk356x: Skip serial pinctrl at pre-reloc phase

[Jonas Karlman]

UART pinctrl for serial is typically applied multiple times:
- in external TPL
- in SPL for DEBUG_UART in board_debug_uart_init()
- in SPL using pinctrl from DT
- in pre-reloc phase using pinctrl from DT
- after relocation using pinctrl from DT

Skip including UART pinctrl for the pre-reloc phase to save time during
boot. On a Radxa ZERO 3W this reduce boot time by ~120 ms.

After this a warning may be shown with LOGLEVEL=5 (or higher), it is
safe to ignore this warning as device probe is successful even when
pinctrl cannot be applied:

  ns16550_serial serial at fe660000: pinctrl_select_state_full: uclass_get_device_by_phandle_id: err=-19

Signed-off-by: Jonas Karlman <jonas at kwiboo.se>
---
 arch/arm/dts/rk356x-u-boot.dtsi | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/arch/arm/dts/rk356x-u-boot.dtsi b/arch/arm/dts/rk356x-u-boot.dtsi
index 0a0943b462a9..9e03d2d8eb97 100644
--- a/arch/arm/dts/rk356x-u-boot.dtsi
+++ b/arch/arm/dts/rk356x-u-boot.dtsi
@@ -163,7 +163,8 @@
 };
 
 &uart2m0_xfer {
-	bootph-all;
+	bootph-pre-sram;
+	bootph-pre-ram;
 };
 
 &xin24m {
-- 
2.45.2