target/linux/ath79/patches-4.14/0015-MIPS-ath79-enable-uart-during-early_prink.patch

   1 From b14f8260724abec6c82970085dece6a143d3a0db Mon Sep 17 00:00:00 2001
   2 From: Gabor Juhos <juhosg@openwrt.org>
   3 Date: Mon, 5 Mar 2018 11:38:21 +0100
   4 Subject: [PATCH 15/27] MIPS: ath79: enable uart during early_prink
   5
   6 Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
   7 ---
   8  arch/mips/ath79/early_printk.c | 44 +++++++++++++++++++++++++++++++++++++++++-
   9  1 file changed, 43 insertions(+), 1 deletion(-)
  10
  11 --- a/arch/mips/ath79/early_printk.c
  12 +++ b/arch/mips/ath79/early_printk.c
  13 @@ -58,6 +58,46 @@ static void prom_putchar_dummy(unsigned
  14         /* nothing to do */
  15  }
  16
  17 +static void prom_enable_uart(u32 id)
  18 +{
  19 +       void __iomem *gpio_base;
  20 +       u32 uart_en;
  21 +       u32 t;
  22 +
  23 +       switch (id) {
  24 +       case REV_ID_MAJOR_AR71XX:
  25 +               uart_en = AR71XX_GPIO_FUNC_UART_EN;
  26 +               break;
  27 +
  28 +       case REV_ID_MAJOR_AR7240:
  29 +       case REV_ID_MAJOR_AR7241:
  30 +       case REV_ID_MAJOR_AR7242:
  31 +               uart_en = AR724X_GPIO_FUNC_UART_EN;
  32 +               break;
  33 +
  34 +       case REV_ID_MAJOR_AR913X:
  35 +               uart_en = AR913X_GPIO_FUNC_UART_EN;
  36 +               break;
  37 +
  38 +       case REV_ID_MAJOR_AR9330:
  39 +       case REV_ID_MAJOR_AR9331:
  40 +               uart_en = AR933X_GPIO_FUNC_UART_EN;
  41 +               break;
  42 +
  43 +       case REV_ID_MAJOR_AR9341:
  44 +       case REV_ID_MAJOR_AR9342:
  45 +       case REV_ID_MAJOR_AR9344:
  46 +               /* TODO */
  47 +       default:
  48 +               return;
  49 +       }
  50 +
  51 +       gpio_base = (void __iomem *)(KSEG1ADDR(AR71XX_GPIO_BASE));
  52 +       t = __raw_readl(gpio_base + AR71XX_GPIO_REG_FUNC);
  53 +       t |= uart_en;
  54 +       __raw_writel(t, gpio_base + AR71XX_GPIO_REG_FUNC);
  55 +}
  56 +
  57  static void prom_putchar_init(void)
  58  {
  59         void __iomem *base;
  60 @@ -88,8 +128,10 @@ static void prom_putchar_init(void)
  61
  62         default:
  63                 _prom_putchar = prom_putchar_dummy;
  64 -               break;
  65 +               return;
  66         }
  67 +
  68 +       prom_enable_uart(id);
  69  }
  70
  71  void prom_putchar(unsigned char ch)