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Date: Wed, 5 Mar 2014 23:07:48 +0100 From: Stefan Agner <stefan@...er.ch> To: shawn.guo@...aro.org, linux@....linux.org.uk Cc: linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org, Stefan Agner <stefan@...er.ch> Subject: [PATCH v2] ARM: vf610: add UART choice for low-level debug Add choice for low-level debug UART. Similar to i.MX6, there is a numeric configuration, valid choices are 0 to 3. Note that the kernel assumes that the boot loader initialized clock properly. Signed-off-by: Stefan Agner <stefan@...er.ch> --- arch/arm/Kconfig.debug | 9 +++++++++ arch/arm/include/debug/vf.S | 15 +++++++++++++-- 2 files changed, 22 insertions(+), 2 deletions(-) diff --git a/arch/arm/Kconfig.debug b/arch/arm/Kconfig.debug index 0531da8..c2005a7 100644 --- a/arch/arm/Kconfig.debug +++ b/arch/arm/Kconfig.debug @@ -946,6 +946,15 @@ config DEBUG_IMX_UART_PORT Choose UART port on which kernel low-level debug messages should be output. +config DEBUG_VF_UART_PORT + int "Vybrid Debug UART Port Selection" if DEBUG_VF_UART + default 1 + range 0 3 + depends on SOC_VF610 + help + Choose UART port on which kernel low-level debug messages + should be output. + config DEBUG_TEGRA_UART bool depends on ARCH_TEGRA diff --git a/arch/arm/include/debug/vf.S b/arch/arm/include/debug/vf.S index ba12cc4..b889338 100644 --- a/arch/arm/include/debug/vf.S +++ b/arch/arm/include/debug/vf.S @@ -7,9 +7,20 @@ * */ +#define VF_UART0_BASE_ADDR 0x40027000 +#define VF_UART1_BASE_ADDR 0x40028000 +#define VF_UART2_BASE_ADDR 0x40029000 +#define VF_UART3_BASE_ADDR 0x4002a000 +#define VF_UART_BASE_ADDR(n) VF_UART##n##_BASE_ADDR +#define VF_UART_BASE(n) VF_UART_BASE_ADDR(n) +#define VF_UART_PHYSICAL_BASE VF_UART_BASE(CONFIG_DEBUG_VF_UART_PORT) + +#define VF_UART_VIRTUAL_BASE 0xfe000000 + .macro addruart, rp, rv, tmp - ldr \rp, =0x40028000 @ physical - ldr \rv, =0xfe028000 @ virtual + ldr \rp, =VF_UART_PHYSICAL_BASE @ physical + and \rv, \rp, #0xffffff @ offset within 16MB section + add \rv, \rv, #VF_UART_VIRTUAL_BASE .endm .macro senduart, rd, rx -- 1.9.0 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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