From 716ca530e1c4515d8683c9d5be3d56b301758b66 Mon Sep 17 00:00:00 2001
From: James <>
Date: Wed, 4 Nov 2015 11:49:21 +0000
Subject: trunk-47381

---
 .../patches-3.18/020-early-printk-support.patch    | 68 ++++++++++++++++++++++
 1 file changed, 68 insertions(+)
 create mode 100644 target/linux/ath25/patches-3.18/020-early-printk-support.patch

(limited to 'target/linux/ath25/patches-3.18/020-early-printk-support.patch')

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
+ 
-- 
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