target/linux/ramips/patches-3.10/0209-MIPS-ralink-add-MT7621-early_printk-support.patch

   1 From a9d4390c6d27e737887388ccbb48f3767f9f89ef Mon Sep 17 00:00:00 2001
   2 From: John Crispin <blogic@openwrt.org>
   3 Date: Fri, 24 Jan 2014 17:01:17 +0100
   4 Subject: [PATCH 209/215] 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 +42,15 @@ static inline u32 uart_r32(unsigned reg)
  23
  24  void prom_putchar(unsigned char ch)
  25  {
  26 +#ifdef CONFIG_SOC_MT7621
  27 +       uart_w32(ch, UART_TX);
  28 +       while ((uart_r32(0x14) & UART_LSR_THRE) == 0)
  29 +               ;
  30 +#else
  31         while ((uart_r32(UART_REG_LSR) & UART_LSR_THRE) == 0)
  32                 ;
  33         uart_w32(ch, UART_REG_TX);
  34         while ((uart_r32(UART_REG_LSR) & UART_LSR_THRE) == 0)
  35                 ;
  36 +#endif
  37  }