diff options
Diffstat (limited to 'target/linux/mvebu/patches-3.10/0030-arm-mvebu-add-another-earlyprintk-Kconfig-option.patch')
| -rw-r--r-- | target/linux/mvebu/patches-3.10/0030-arm-mvebu-add-another-earlyprintk-Kconfig-option.patch | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/target/linux/mvebu/patches-3.10/0030-arm-mvebu-add-another-earlyprintk-Kconfig-option.patch b/target/linux/mvebu/patches-3.10/0030-arm-mvebu-add-another-earlyprintk-Kconfig-option.patch new file mode 100644 index 0000000000..7faeb986a0 --- /dev/null +++ b/target/linux/mvebu/patches-3.10/0030-arm-mvebu-add-another-earlyprintk-Kconfig-option.patch @@ -0,0 +1,85 @@ +From 70c30ca997919a4b8c9051a3903f30c79c735f12 Mon Sep 17 00:00:00 2001 +From: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> +Date: Wed, 5 Jun 2013 09:05:00 +0200 +Subject: [PATCH 030/203] arm: mvebu: add another earlyprintk Kconfig option + +In order to support both old and new bootloaders, we add a new Kconfig +option for the earlyprintk UART selection. The existing option allows +to work with old bootloaders (that keep the internal registers mapped +at 0xd0000000), while the newly introduced option allows to work with +new bootloaders (that remap the internal registers at 0xf1000000). + +Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> +Acked-by: Arnd Bergmann <arnd@arndb.de> +Signed-off-by: Jason Cooper <jason@lakedaemon.net> +--- + arch/arm/Kconfig.debug | 30 ++++++++++++++++++++++++++++-- + arch/arm/include/debug/mvebu.S | 5 +++++ + 2 files changed, 33 insertions(+), 2 deletions(-) + +--- a/arch/arm/Kconfig.debug ++++ b/arch/arm/Kconfig.debug +@@ -303,12 +303,37 @@ choice + their output to the serial port on MSM 8960 devices. + + config DEBUG_MVEBU_UART +- bool "Kernel low-level debugging messages via MVEBU UART" ++ bool "Kernel low-level debugging messages via MVEBU UART (old bootloaders)" + depends on ARCH_MVEBU + help + Say Y here if you want kernel low-level debugging support + on MVEBU based platforms. + ++ This option should be used with the old bootloaders ++ that left the internal registers mapped at ++ 0xd0000000. As of today, this is the case on ++ platforms such as the Globalscale Mirabox or the ++ Plathome OpenBlocks AX3, when using the original ++ bootloader. ++ ++ If the wrong DEBUG_MVEBU_UART* option is selected, ++ when u-boot hands over to the kernel, the system ++ silently crashes, with no serial output at all. ++ ++ config DEBUG_MVEBU_UART_ALTERNATE ++ bool "Kernel low-level debugging messages via MVEBU UART (new bootloaders)" ++ depends on ARCH_MVEBU ++ help ++ Say Y here if you want kernel low-level debugging support ++ on MVEBU based platforms. ++ ++ This option should be used with the new bootloaders ++ that remap the internal registers at 0xf1000000. ++ ++ If the wrong DEBUG_MVEBU_UART* option is selected, ++ when u-boot hands over to the kernel, the system ++ silently crashes, with no serial output at all. ++ + config DEBUG_NOMADIK_UART + bool "Kernel low-level debugging messages via NOMADIK UART" + depends on ARCH_NOMADIK +@@ -632,7 +657,8 @@ config DEBUG_LL_INCLUDE + DEBUG_IMX51_UART || \ + DEBUG_IMX53_UART ||\ + DEBUG_IMX6Q_UART +- default "debug/mvebu.S" if DEBUG_MVEBU_UART ++ default "debug/mvebu.S" if DEBUG_MVEBU_UART || \ ++ DEBUG_MVEBU_UART_ALTERNATE + default "debug/mxs.S" if DEBUG_IMX23_UART || DEBUG_IMX28_UART + default "debug/nomadik.S" if DEBUG_NOMADIK_UART + default "debug/omap2plus.S" if DEBUG_OMAP2PLUS_UART +--- a/arch/arm/include/debug/mvebu.S ++++ b/arch/arm/include/debug/mvebu.S +@@ -11,7 +11,12 @@ + * published by the Free Software Foundation. + */ + ++#ifdef CONFIG_DEBUG_MVEBU_UART_ALTERNATE ++#define ARMADA_370_XP_REGS_PHYS_BASE 0xf1000000 ++#else + #define ARMADA_370_XP_REGS_PHYS_BASE 0xd0000000 ++#endif ++ + #define ARMADA_370_XP_REGS_VIRT_BASE 0xfec00000 + + .macro addruart, rp, rv, tmp |