ARM: debug: add support for Palmchip BK-310x UART (0c532546) · Commits · 戴 / test

Some SoCs use a Palmchip BK-310x UART which is mostly 16550 compatible but with a different register layout. While this UART has previously only been supported in MIPS based chips (Alchemy, Ralink), the ARM based SMP87xx series from Sigma Designs also uses it. This patch allows the debug console to work with this type of UART. Signed-off-by:

Mans Rullgard <mans@mansr.com> Signed-off-by:

Marc Gonzalez <marc_gonzalez@sigmadesigns.com> Acked-by:

Arnd Bergmann <arnd@arndb.de> Acked-by:

Kevin Hilman <khilman@baylibre.com> Signed-off-by:

Olof Johansson <olof@lixom.net>

arch/arm/Kconfig.debug

+9 −0

Original line number	Diff line number	Diff line
		@@ -1368,6 +1368,7 @@ config DEBUG_SIRFSOC_UART
		config DEBUG_LL_INCLUDE
		string
		default "debug/sa1100.S" if DEBUG_SA1100
		default "debug/palmchip.S" if DEBUG_UART_8250_PALMCHIP
		default "debug/8250.S" if DEBUG_LL_UART_8250 \|\| DEBUG_UART_8250
		default "debug/at91.S" if DEBUG_AT91_UART
		default "debug/asm9260.S" if DEBUG_ASM9260_UART
		@@ -1656,6 +1657,14 @@ config DEBUG_UART_8250_WORD
		DEBUG_BCM_KONA_UART \|\| DEBUG_RK32_UART2 \|\| \
		DEBUG_BRCMSTB_UART

		config DEBUG_UART_8250_PALMCHIP
		bool "8250 UART is Palmchip BK-310x"
		depends on DEBUG_LL_UART_8250 \|\| DEBUG_UART_8250
		help
		Palmchip provides a UART implementation compatible with 16550
		except for having a different register layout. Say Y here if
		the debug UART is of this type.

		config DEBUG_UART_8250_FLOW_CONTROL
		bool "Enable flow control for 8250 UART"
		depends on DEBUG_LL_UART_8250 \|\| DEBUG_UART_8250

arch/arm/include/debug/palmchip.S

0 → 100644

+11 −0

Original line number	Diff line number	Diff line
		#include <linux/serial_reg.h>

		#undef UART_TX
		#undef UART_LSR
		#undef UART_MSR

		#define UART_TX 1
		#define UART_LSR 7
		#define UART_MSR 8

		#include <debug/8250.S>

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