target/linux/cns3xxx/patches/104-cns3xxx_gpio.patch

   1 --- a/arch/arm/mach-cns3xxx/cns3420vb.c
   2 +++ b/arch/arm/mach-cns3xxx/cns3420vb.c
   3 @@ -215,7 +215,7 @@ static struct map_desc cns3420_io_desc[]
   4
   5  static void __init cns3420_map_io(void)
   6  {
   7 -       cns3xxx_map_io();
   8 +       cns3xxx_common_init();
   9         iotable_init(cns3420_io_desc, ARRAY_SIZE(cns3420_io_desc));
  10
  11         cns3420_early_serial_setup();
  12 --- a/arch/arm/mach-cns3xxx/core.c
  13 +++ b/arch/arm/mach-cns3xxx/core.c
  14 @@ -18,6 +18,7 @@
  15  #include <asm/hardware/gic.h>
  16  #include <asm/smp_twd.h>
  17  #include <asm/hardware/cache-l2x0.h>
  18 +#include <asm/gpio.h>
  19  #include <mach/cns3xxx.h>
  20  #include "core.h"
  21
  22 @@ -75,12 +76,96 @@ static struct map_desc cns3xxx_io_desc[]
  23         },
  24  };
  25
  26 -void __init cns3xxx_map_io(void)
  27 +int gpio_to_irq(int gpio)
  28 +{
  29 +       if (gpio > 63)
  30 +               return -EINVAL;
  31 +
  32 +       if (gpio < 32)
  33 +               return IRQ_CNS3XXX_GPIOA;
  34 +       else
  35 +               return IRQ_CNS3XXX_GPIOB;
  36 +}
  37 +EXPORT_SYMBOL(gpio_to_irq);
  38 +
  39 +int irq2gpio(int irq)
  40 +{
  41 +       if (irq == IRQ_CNS3XXX_GPIOA)
  42 +               return 0;
  43 +       else if (irq == IRQ_CNS3XXX_GPIOB)
  44 +               return 32;
  45 +       else
  46 +               return -EINVAL;
  47 +}
  48 +EXPORT_SYMBOL(irq2gpio);
  49 +
  50 +static inline void gpio_line_config(u8 line, u32 direction)
  51 +{
  52 +       u32 reg;
  53 +       if (direction) {
  54 +               if (line < 32) {
  55 +                       reg = __raw_readl(CNS3XXX_GPIOA_BASE_VIRT + CNS3XXX_GPIO_DIR);
  56 +                       reg |= (1 << line);
  57 +                       __raw_writel(reg, CNS3XXX_GPIOA_BASE_VIRT + CNS3XXX_GPIO_DIR);
  58 +               } else {
  59 +                       reg = __raw_readl(CNS3XXX_GPIOB_BASE_VIRT + CNS3XXX_GPIO_DIR);
  60 +                       reg |= (1 << (line - 32));
  61 +                       __raw_writel(reg, CNS3XXX_GPIOB_BASE_VIRT + CNS3XXX_GPIO_DIR);
  62 +               }
  63 +       } else {
  64 +               if (line < 32) {
  65 +                       reg = __raw_readl(CNS3XXX_GPIOA_BASE_VIRT + CNS3XXX_GPIO_DIR);
  66 +                       reg &= ~(1 << line);
  67 +                       __raw_writel(reg, CNS3XXX_GPIOA_BASE_VIRT + CNS3XXX_GPIO_DIR);
  68 +               } else {
  69 +                       reg = __raw_readl(CNS3XXX_GPIOB_BASE_VIRT + CNS3XXX_GPIO_DIR);
  70 +                       reg &= ~(1 << (line - 32));
  71 +                       __raw_writel(reg, CNS3XXX_GPIOB_BASE_VIRT + CNS3XXX_GPIO_DIR);
  72 +               }
  73 +       }
  74 +}
  75 +
  76 +static int cns3xxx_gpio_direction_input(struct gpio_chip *chip, unsigned gpio)
  77 +{
  78 +       gpio_line_config(gpio, CNS3XXX_GPIO_IN);
  79 +       return 0;
  80 +}
  81 +
  82 +static int cns3xxx_gpio_direction_output(struct gpio_chip *chip, unsigned gpio, int level)
  83 +{
  84 +       gpio_line_set(gpio, level);
  85 +       gpio_line_config(gpio, CNS3XXX_GPIO_OUT);
  86 +       return 0;
  87 +}
  88 +
  89 +static int cns3xxx_gpio_get_value(struct gpio_chip *chip, unsigned gpio)
  90 +{
  91 +       return gpio_get_value(gpio);
  92 +}
  93 +
  94 +static void cns3xxx_gpio_set_value(struct gpio_chip *chip, unsigned gpio, int value)
  95 +{
  96 +       gpio_set_value(gpio, value);
  97 +}
  98 +
  99 +static struct gpio_chip cns3xxx_gpio_chip = {
 100 +       .label                  = "CNS3XXX_GPIO_CHIP",
 101 +       .direction_input        = cns3xxx_gpio_direction_input,
 102 +       .direction_output       = cns3xxx_gpio_direction_output,
 103 +       .get                    = cns3xxx_gpio_get_value,
 104 +       .set                    = cns3xxx_gpio_set_value,
 105 +       .base                   = 0,
 106 +       .ngpio                  = 64,
 107 +};
 108 +
 109 +void __init cns3xxx_common_init(void)
 110  {
 111  #ifdef CONFIG_LOCAL_TIMERS
 112         twd_base = (void __iomem *) CNS3XXX_TC11MP_TWD_BASE_VIRT;
 113  #endif
 114         iotable_init(cns3xxx_io_desc, ARRAY_SIZE(cns3xxx_io_desc));
 115 +
 116 +       gpiochip_add(&cns3xxx_gpio_chip);
 117  }
 118
 119  /* used by entry-macro.S */
 120 --- a/arch/arm/mach-cns3xxx/core.h
 121 +++ b/arch/arm/mach-cns3xxx/core.h
 122 @@ -20,7 +20,7 @@ void __init cns3xxx_l2x0_init(void);
 123  static inline void cns3xxx_l2x0_init(void) {}
 124  #endif /* CONFIG_CACHE_L2X0 */
 125
 126 -void __init cns3xxx_map_io(void);
 127 +void __init cns3xxx_common_init(void);
 128  void __init cns3xxx_init_irq(void);
 129  void cns3xxx_power_off(void);
 130
 131 --- a/arch/arm/mach-cns3xxx/laguna.c
 132 +++ b/arch/arm/mach-cns3xxx/laguna.c
 133 @@ -611,7 +611,7 @@ static struct map_desc laguna_io_desc[]
 134
 135  static void __init laguna_map_io(void)
 136  {
 137 -       cns3xxx_map_io();
 138 +       cns3xxx_common_init();
 139         iotable_init(laguna_io_desc, ARRAY_SIZE(laguna_io_desc));
 140         laguna_early_serial_setup();
 141  }