target/linux/ramips/patches-3.10/0503-MIPS-ralink-add-MT7621-early_printk-support.patch

   1 From 643e61b22155cd95ae6e18e57da50acd120da091 Mon Sep 17 00:00:00 2001
   2 From: John Crispin <blogic@openwrt.org>
   3 Date: Mon, 2 Dec 2013 16:11:33 +0100
   4 Subject: [PATCH 503/507] MIPS: ralink: add MT7621 early_printk support
   5
   6 Signed-off-by: John Crispin <blogic@openwrt.org>
   7 ---
   8  arch/mips/ralink/early_printk.c |   10 +++++++---
   9  1 file changed, 7 insertions(+), 3 deletions(-)
  10
  11 --- a/arch/mips/ralink/early_printk.c
  12 +++ b/arch/mips/ralink/early_printk.c
  13 @@ -13,6 +13,8 @@
  14
  15  #ifdef CONFIG_SOC_RT288X
  16  #define EARLY_UART_BASE         0x300c00
  17 +#elif defined(CONFIG_SOC_MT7621)
  18 +#define EARLY_UART_BASE         0x1E000c00
  19  #else
  20  #define EARLY_UART_BASE         0x10000c00
  21  #endif
  22 @@ -40,9 +42,13 @@ static inline u32 uart_r32(unsigned reg)
  23
  24  void prom_putchar(unsigned char ch)
  25  {
  26 -       while ((uart_r32(UART_REG_LSR) & UART_LSR_THRE) == 0)
  27 +#ifdef CONFIG_SOC_MT7621
  28 +       uart_w32(ch, UART_TX);
  29 +       while ((uart_r32(0x14) & UART_LSR_THRE) == 0)
  30                 ;
  31 -       uart_w32(ch, UART_REG_TX);
  32 +#else
  33         while ((uart_r32(UART_REG_LSR) & UART_LSR_THRE) == 0)
  34                 ;
  35 +       uart_w32(ch, UART_REG_TX);
  36 +#endif
  37  }