diff options
Diffstat (limited to 'configs/platform-energymicro-efm32gg-dk3750/patches/linux-3.12-rc4/0006-ARM-DEBUG_LL-on-efm32-SoCs.patch')
| -rw-r--r-- | configs/platform-energymicro-efm32gg-dk3750/patches/linux-3.12-rc4/0006-ARM-DEBUG_LL-on-efm32-SoCs.patch | 116 |
1 files changed, 116 insertions, 0 deletions
diff --git a/configs/platform-energymicro-efm32gg-dk3750/patches/linux-3.12-rc4/0006-ARM-DEBUG_LL-on-efm32-SoCs.patch b/configs/platform-energymicro-efm32gg-dk3750/patches/linux-3.12-rc4/0006-ARM-DEBUG_LL-on-efm32-SoCs.patch new file mode 100644 index 0000000..142cb90 --- /dev/null +++ b/configs/platform-energymicro-efm32gg-dk3750/patches/linux-3.12-rc4/0006-ARM-DEBUG_LL-on-efm32-SoCs.patch @@ -0,0 +1,116 @@ +From: =?UTF-8?q?Uwe=20Kleine-K=C3=B6nig?= <u.kleine-koenig@pengutronix.de> +Date: Tue, 24 Sep 2013 15:52:44 +0200 +Subject: [PATCH] ARM: DEBUG_LL on efm32 SoCs +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +This implements output of debug messages on efm32 SoCs. + +Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> +--- + arch/arm/Kconfig.debug | 17 ++++++++++++++++ + arch/arm/include/debug/efm32.S | 45 ++++++++++++++++++++++++++++++++++++++++++ + 2 files changed, 62 insertions(+) + create mode 100644 arch/arm/include/debug/efm32.S + +diff --git a/arch/arm/Kconfig.debug b/arch/arm/Kconfig.debug +index 9762c84..2b32068 100644 +--- a/arch/arm/Kconfig.debug ++++ b/arch/arm/Kconfig.debug +@@ -834,6 +834,20 @@ choice + options; the platform specific options are deprecated + and will be soon removed. + ++ config DEBUG_LL_UART_EFM32 ++ bool "Kernel low-level debugging via efm32 UART" ++ depends on ARCH_EFM32 ++ help ++ Say Y here if you want the debug print routines to direct ++ their output to an UART or USART port on efm32 based ++ machines. Use the following addresses for DEBUG_UART_PHYS: ++ ++ 0x4000c000 | USART0 ++ 0x4000c400 | USART1 ++ 0x4000c800 | USART2 ++ 0x4000e000 | UART0 ++ 0x4000e400 | UART1 ++ + config DEBUG_LL_UART_PL01X + bool "Kernel low-level debugging via ARM Ltd PL01x Primecell UART" + help +@@ -885,6 +899,7 @@ config DEBUG_LL_INCLUDE + default "debug/8250.S" if DEBUG_LL_UART_8250 || DEBUG_UART_8250 + default "debug/pl01x.S" if DEBUG_LL_UART_PL01X || DEBUG_UART_PL01X + default "debug/exynos.S" if DEBUG_EXYNOS_UART ++ default "debug/efm32.S" if DEBUG_LL_UART_EFM32 + default "debug/icedcc.S" if DEBUG_ICEDCC + default "debug/imx.S" if DEBUG_IMX1_UART || \ + DEBUG_IMX25_UART || \ +@@ -951,6 +966,7 @@ config DEBUG_UART_PHYS + default 0x20064000 if DEBUG_RK29_UART1 || DEBUG_RK3X_UART2 + default 0x20068000 if DEBUG_RK29_UART2 || DEBUG_RK3X_UART3 + default 0x20201000 if DEBUG_BCM2835 ++ default 0x4000e400 if DEBUG_LL_UART_EFM32 + default 0x40090000 if ARCH_LPC32XX + default 0x40100000 if DEBUG_PXA_UART1 + default 0x42000000 if ARCH_GEMINI +@@ -981,6 +997,7 @@ config DEBUG_UART_PHYS + default 0xfff36000 if DEBUG_HIGHBANK_UART + default 0xfffff700 if ARCH_IOP33X + depends on DEBUG_LL_UART_8250 || DEBUG_LL_UART_PL01X || \ ++ DEBUG_LL_UART_EFM32 || \ + DEBUG_UART_8250 || DEBUG_UART_PL01X + + config DEBUG_UART_VIRT +diff --git a/arch/arm/include/debug/efm32.S b/arch/arm/include/debug/efm32.S +new file mode 100644 +index 0000000..2265a19 +--- /dev/null ++++ b/arch/arm/include/debug/efm32.S +@@ -0,0 +1,45 @@ ++/* ++ * Copyright (C) 2013 Pengutronix ++ * Uwe Kleine-Koenig <u.kleine-koenig@pengutronix.de> ++ * ++ * This program is free software; you can redistribute it and/or modify ++ * it under the terms of the GNU General Public License version 2 as ++ * published by the Free Software Foundation. ++ */ ++ ++#define UARTn_CMD 0x000c ++#define UARTn_CMD_TXEN 0x0004 ++ ++#define UARTn_STATUS 0x0010 ++#define UARTn_STATUS_TXC 0x0020 ++#define UARTn_STATUS_TXBL 0x0040 ++ ++#define UARTn_TXDATA 0x0034 ++ ++ .macro addruart, rx, tmp ++ ldr \rx, =(CONFIG_DEBUG_UART_PHYS) ++ ++ /* ++ * enable TX. The driver might disable it to save energy. We ++ * don't care about disabling at the end as during debug power ++ * consumption isn't that important. ++ */ ++ ldr \tmp, =(UARTn_CMD_TXEN) ++ str \tmp, [\rx, #UARTn_CMD] ++ .endm ++ ++ .macro senduart,rd,rx ++ strb \rd, [\rx, #UARTn_TXDATA] ++ .endm ++ ++ .macro waituart,rd,rx ++1001: ldr \rd, [\rx, #UARTn_STATUS] ++ tst \rd, #UARTn_STATUS_TXBL ++ beq 1001b ++ .endm ++ ++ .macro busyuart,rd,rx ++1001: ldr \rd, [\rx, UARTn_STATUS] ++ tst \rd, #UARTn_STATUS_TXC ++ bne 1001b ++ .endm |