On 27.11.19 11:12, Paul Kocialkowski wrote:
Some generic PX30 SoMs found in the wild use UART3 as their debug output
instead of UART2 (used for MMC) and UART5.
Make it possible to use UART3 as early debug output, with the associated
clock and pinmux configuration. Two sets of output pins are supported (M0/M1)
so a Kconfig option to select between the two is introduced like it's done
for UART2.
Future users should also note that the pinmux default in the dts is to use
the M1 pins while the Kconfig option takes M0 as a default.
Signed-off-by: Paul Kocialkowski <paul.kocialkow...@bootlin.com>
Reviewed-by: Heiko Stuebner <heiko.stueb...@theobroma-systems.com>
with one small question below
diff --git a/arch/arm/mach-rockchip/px30/Kconfig
b/arch/arm/mach-rockchip/px30/Kconfig
index 109a37be15ad..167517bbd63f 100644
--- a/arch/arm/mach-rockchip/px30/Kconfig
+++ b/arch/arm/mach-rockchip/px30/Kconfig
@@ -36,6 +36,15 @@ config DEBUG_UART2_CHANNEL
For using the UART for early debugging the route to use needs
to be declared (0 or 1).
+config DEBUG_UART3_CHANNEL
+ int "Mux channel to use for debug UART3"
+ depends on DEBUG_UART_BOARD_INIT
+ default 0
+ help
+ UART3 can use two different set of pins to route the output.
+ For using the UART for early debugging the route to use needs
+ to be declared (0 or 1).
+
source "board/rockchip/evb_px30/Kconfig"
Would it make sense to rename DEBUG_UART3_CHANNEL to just
DEBUG_UART_CHANNEL and reuse it, so that we don't collect similar
options for each uart?
Heiko
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