diff options
Diffstat (limited to 'target/linux/ath25/patches-3.18/020-early-printk-support.patch')
| -rw-r--r-- | target/linux/ath25/patches-3.18/020-early-printk-support.patch | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/target/linux/ath25/patches-3.18/020-early-printk-support.patch b/target/linux/ath25/patches-3.18/020-early-printk-support.patch new file mode 100644 index 0000000..bd937d3 --- /dev/null +++ b/target/linux/ath25/patches-3.18/020-early-printk-support.patch @@ -0,0 +1,68 @@ +--- /dev/null ++++ b/arch/mips/ath25/early_printk.c +@@ -0,0 +1,44 @@ ++/* ++ * This file is subject to the terms and conditions of the GNU General Public ++ * License. See the file "COPYING" in the main directory of this archive ++ * for more details. ++ * ++ * Copyright (C) 2010 Gabor Juhos <juhosg@openwrt.org> ++ */ ++ ++#include <linux/mm.h> ++#include <linux/io.h> ++#include <linux/serial_reg.h> ++ ++#include "devices.h" ++#include "ar2315_regs.h" ++#include "ar5312_regs.h" ++ ++static inline void prom_uart_wr(void __iomem *base, unsigned reg, ++ unsigned char ch) ++{ ++ __raw_writel(ch, base + 4 * reg); ++} ++ ++static inline unsigned char prom_uart_rr(void __iomem *base, unsigned reg) ++{ ++ return __raw_readl(base + 4 * reg); ++} ++ ++void prom_putchar(unsigned char ch) ++{ ++ static void __iomem *base; ++ ++ if (unlikely(base == NULL)) { ++ if (is_ar2315()) ++ base = (void __iomem *)(KSEG1ADDR(AR2315_UART0_BASE)); ++ else ++ base = (void __iomem *)(KSEG1ADDR(AR5312_UART0_BASE)); ++ } ++ ++ while ((prom_uart_rr(base, UART_LSR) & UART_LSR_THRE) == 0) ++ ; ++ prom_uart_wr(base, UART_TX, ch); ++ while ((prom_uart_rr(base, UART_LSR) & UART_LSR_THRE) == 0) ++ ; ++} +--- a/arch/mips/ath25/Makefile ++++ b/arch/mips/ath25/Makefile +@@ -9,5 +9,8 @@ + # + + obj-y += board.o prom.o devices.o ++ ++obj-$(CONFIG_EARLY_PRINTK) += early_printk.o ++ + obj-$(CONFIG_SOC_AR5312) += ar5312.o + obj-$(CONFIG_SOC_AR2315) += ar2315.o +--- a/arch/mips/Kconfig ++++ b/arch/mips/Kconfig +@@ -106,6 +106,7 @@ config ATH25 + select SYS_HAS_CPU_MIPS32_R1 + select SYS_SUPPORTS_BIG_ENDIAN + select SYS_SUPPORTS_32BIT_KERNEL ++ select SYS_HAS_EARLY_PRINTK + help + Support for Atheros AR231x and Atheros AR531x based boards + |