[RESEND][PATCH] ARM: debug: add support for Palmchip 16550-like UART
From: Mans Rullgard <hidden>
Date: 2015-10-27 12:58:12
Also in:
lkml
Subsystem:
arm port, the rest · Maintainers:
Russell King, Linus Torvalds
Some SoCs have a Palmchip UART with a non-standard register layout. This allows the debug console to work with these. Signed-off-by: Mans Rullgard <redacted> --- arch/arm/Kconfig.debug | 8 ++++++++ arch/arm/include/debug/8250.S | 12 ++++++++++++ 2 files changed, 20 insertions(+)
diff --git a/arch/arm/Kconfig.debug b/arch/arm/Kconfig.debug
index 0cfd7f9..9039fff 100644
--- a/arch/arm/Kconfig.debug
+++ b/arch/arm/Kconfig.debug@@ -1597,6 +1597,14 @@ 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 variant" + 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
diff --git a/arch/arm/include/debug/8250.S b/arch/arm/include/debug/8250.S
index 7f7446f..2332f40 100644
--- a/arch/arm/include/debug/8250.S
+++ b/arch/arm/include/debug/8250.S@@ -9,6 +9,18 @@ */ #include <linux/serial_reg.h> +#ifdef CONFIG_DEBUG_UART_8250_PALMCHIP + +#undef UART_TX +#undef UART_LSR +#undef UART_MSR + +#define UART_TX 1 +#define UART_LSR 7 +#define UART_MSR 8 + +#endif + .macro addruart, rp, rv, tmp ldr \rp, =CONFIG_DEBUG_UART_PHYS ldr \rv, =CONFIG_DEBUG_UART_VIRT
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2.6.2