target/linux/ar71xx/patches-3.8/521-MIPS-ath79-enable-UART-for-early_serial.patch

   1 --- a/arch/mips/ath79/early_printk.c
   2 +++ b/arch/mips/ath79/early_printk.c
   3 @@ -56,6 +56,46 @@ static void prom_putchar_dummy(unsigned
   4         /* nothing to do */
   5  }
   6
   7 +static void prom_enable_uart(u32 id)
   8 +{
   9 +       void __iomem *gpio_base;
  10 +       u32 uart_en;
  11 +       u32 t;
  12 +
  13 +       switch (id) {
  14 +       case REV_ID_MAJOR_AR71XX:
  15 +               uart_en = AR71XX_GPIO_FUNC_UART_EN;
  16 +               break;
  17 +
  18 +       case REV_ID_MAJOR_AR7240:
  19 +       case REV_ID_MAJOR_AR7241:
  20 +       case REV_ID_MAJOR_AR7242:
  21 +               uart_en = AR724X_GPIO_FUNC_UART_EN;
  22 +               break;
  23 +
  24 +       case REV_ID_MAJOR_AR913X:
  25 +               uart_en = AR913X_GPIO_FUNC_UART_EN;
  26 +               break;
  27 +
  28 +       case REV_ID_MAJOR_AR9330:
  29 +       case REV_ID_MAJOR_AR9331:
  30 +               uart_en = AR933X_GPIO_FUNC_UART_EN;
  31 +               break;
  32 +
  33 +       case REV_ID_MAJOR_AR9341:
  34 +       case REV_ID_MAJOR_AR9342:
  35 +       case REV_ID_MAJOR_AR9344:
  36 +               /* TODO */
  37 +       default:
  38 +               return;
  39 +       }
  40 +
  41 +       gpio_base = (void __iomem *)(KSEG1ADDR(AR71XX_GPIO_BASE));
  42 +       t = __raw_readl(gpio_base + AR71XX_GPIO_REG_FUNC);
  43 +       t |= uart_en;
  44 +       __raw_writel(t, gpio_base + AR71XX_GPIO_REG_FUNC);
  45 +}
  46 +
  47  static void prom_putchar_init(void)
  48  {
  49         void __iomem *base;
  50 @@ -86,8 +126,10 @@ static void prom_putchar_init(void)
  51
  52         default:
  53                 _prom_putchar = prom_putchar_dummy;
  54 -               break;
  55 +               return;
  56         }
  57 +
  58 +       prom_enable_uart(id);
  59  }
  60
  61  void prom_putchar(unsigned char ch)