From 7a2071c58f36450fbf44a27d2e5d371c18534a25 Mon Sep 17 00:00:00 2001 From: Geert Uytterhoeven Date: Fri, 14 Nov 2014 16:49:47 +0100 Subject: ARM: shmobile: Add early debugging support using SCIF(A) Add serial port debug macros for the SCIF(A) serial ports. This includes all supported shmobile SoCs, except for EMEV2. The configuration logic (both Kconfig and #ifdef) is more complicated than one would expect, for several reasons: 1. Not all SoCs have the same serial devices, and they're not always at the same addresses. 2. There are two different types: SCIF and SCIFA. Fortunately they can easily be distinguished by physical address. 3. Not all boards use the same serial port for the console. The defaults correspond to the boards that are supported in mainline. If you want to use a different serial port, just change the value of CONFIG_DEBUG_UART_PHYS, and the rest will auto-adapt. 4. debug_ll_io_init() maps the SCIF(A) registers to a fixed virtual address. 0xfdxxxxxx was chosen, as it should lie below VMALLOC_END = 0xff000000, and must not conflict with the 2 MiB reserved region at PCI_IO_VIRT_BASE = 0xfee00000. - On SoCs not using the legacy machine_desc.map_io(), debug_ll_io_init() is called by the ARM core code. - On SoCs using the legacy machine_desc.map_io(), debug_ll_io_init() must be called explicitly. Calls are added for r8a7740, r8a7779, sh7372, and sh73a0. This was derived from the r8a7790 version by Laurent Pinchart. Signed-off-by: Geert Uytterhoeven Acked-by: Laurent Pinchart Acked-by: Arnd Bergmann Tested-by: Simon Horman Signed-off-by: Simon Horman --- MAINTAINERS | 1 + 1 file changed, 1 insertion(+) (limited to 'MAINTAINERS') diff --git a/MAINTAINERS b/MAINTAINERS index a20df9bf8ab0..7d843099e9c6 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -1387,6 +1387,7 @@ F: arch/arm/configs/lager_defconfig F: arch/arm/configs/mackerel_defconfig F: arch/arm/configs/marzen_defconfig F: arch/arm/configs/shmobile_defconfig +F: arch/arm/include/debug/renesas-scif.S F: arch/arm/mach-shmobile/ F: drivers/sh/ -- cgit v1.2.3-55-g7522