target/linux/ar71xx/patches-4.4/820-MIPS-ath79-add_gpio_function2_setup.patch

   1 Add access to the function2 gpio register. This probably has to be
   2 converted into a pimux driver later on. This is needed for some setup
   3 functions on the Arduino Yun.
   4
   5 --- a/arch/mips/ath79/common.h
   6 +++ b/arch/mips/ath79/common.h
   7 @@ -28,6 +28,7 @@ void ath79_ddr_wb_flush(unsigned int reg
   8  void ath79_gpio_function_enable(u32 mask);
   9  void ath79_gpio_function_disable(u32 mask);
  10  void ath79_gpio_function_setup(u32 set, u32 clear);
  11 +void ath79_gpio_function2_setup(u32 set, u32 clear);
  12  void ath79_gpio_output_select(unsigned gpio, u8 val);
  13  int ath79_gpio_direction_select(unsigned gpio, bool oe);
  14  void ath79_gpio_init(void);
  15 --- a/arch/mips/ath79/gpio.c
  16 +++ b/arch/mips/ath79/gpio.c
  17 @@ -42,6 +42,31 @@ static void __iomem *ath79_gpio_get_func
  18         return ath79_gpio_base + reg;
  19  }
  20
  21 +static void __iomem *ath79_gpio_get_function2_reg(void)
  22 +{
  23 +       u32 reg = 0;
  24 +
  25 +       if (soc_is_ar71xx() ||
  26 +           soc_is_ar724x() ||
  27 +           soc_is_ar913x() ||
  28 +           soc_is_ar933x())
  29 +               reg = AR71XX_GPIO_REG_FUNC_2;
  30 +       else
  31 +               BUG();
  32 +
  33 +       return ath79_gpio_base + reg;
  34 +}
  35 +
  36 +
  37 +void ath79_gpio_function2_setup(u32 set, u32 clear)
  38 +{
  39 +       void __iomem *reg = ath79_gpio_get_function2_reg();
  40 +
  41 +       __raw_writel((__raw_readl(reg) & ~clear) | set, reg);
  42 +       /* flush write */
  43 +       __raw_readl(reg);
  44 +}
  45 +
  46  void ath79_gpio_function_setup(u32 set, u32 clear)
  47  {
  48         void __iomem *reg = ath79_gpio_get_function_reg();
  49 --- a/arch/mips/include/asm/mach-ath79/ar71xx_regs.h
  50 +++ b/arch/mips/include/asm/mach-ath79/ar71xx_regs.h
  51 @@ -847,6 +847,7 @@
  52  #define AR71XX_GPIO_REG_INT_PENDING    0x20
  53  #define AR71XX_GPIO_REG_INT_ENABLE     0x24
  54  #define AR71XX_GPIO_REG_FUNC           0x28
  55 +#define AR71XX_GPIO_REG_FUNC_2         0x30
  56
  57  #define AR934X_GPIO_REG_OUT_FUNC0      0x2c
  58  #define AR934X_GPIO_REG_OUT_FUNC1      0x30
  59 @@ -971,6 +972,8 @@
  60  #define AR724X_GPIO_FUNC_UART_EN               BIT(1)
  61  #define AR724X_GPIO_FUNC_JTAG_DISABLE          BIT(0)
  62
  63 +#define AR933X_GPIO_FUNC2_JUMPSTART_DISABLE    BIT(9)
  64 +
  65  #define AR913X_GPIO_FUNC_WMAC_LED_EN           BIT(22)
  66  #define AR913X_GPIO_FUNC_EXP_PORT_CS_EN                BIT(21)
  67  #define AR913X_GPIO_FUNC_I2S_REFCLKEN          BIT(20)