1. arch/avr32/mach-at32ap/pio.c
  2. /* Pin multiplexing API */
  3. void __init at32_select_periph(unsigned int port, u32 pin_mask, unsigned int periph,
  4.                                unsigned long flags)
  5. {
  6.         int i;
  7.         struct pio_device *pio;
  8.  
  9.         for(i = 0; i < 32; i++) {
  10.                 unsigned int pin = port + i;
  11.                 unsigned int pin_index = pin & 0x1f;
  12.                 u32 mask = 1 << pin_index;
  13.  
  14.                 if(!((1 << i) & pin_mask))
  15.                         continue;
  16. ...
  17. }
  18.  
  19. arch/avr32/boards/hammerhead/setup.c
  20. static u32 get_pin_mask(unsigned int port);
  21. struct atmel_lcdfb_info __initdata hammerhead_lcdc_data = {
  22.         .default_bpp            = 24,
  23.         .default_dmacon         = ATMEL_LCDC_DMAEN | ATMEL_LCDC_DMA2DEN,
  24.         .default_lcdcon2        = (ATMEL_LCDC_DISTYPE_TFT
  25.                                    | ATMEL_LCDC_INVCLK
  26.                                    | ATMEL_LCDC_CLKMOD_ALWAYSACTIVE
  27.                                    | ATMEL_LCDC_MEMOR_BIG),
  28.         .default_monspecs       = &hammerhead_hda350t_monspecs,
  29.         .guard_time             = 2,
  30.         .get_pin_mask           = get_pin_mask,
  31. };
  32.  
  33.  
  34. static u32 get_pin_mask(unsigned int port) {
  35.         u32 pin_mask = 0;
  36.  
  37.         switch(port) {
  38.         case GPIO_PIOC_BASE:
  39.                 pin_mask = LCD_PERIPH_HSYNC | LCD_PERIPH_PCLK | LCD_PERIPH_VSYNC | LCD_PERIPH_PWR |
  40.                            LCD_PERIPH_DATA0 | LCD_PERIPH_DATA1 | LCD_PERIPH_DATA2 | LCD_PERIPH_DATA3 |
  41.                            LCD_PERIPH_DATA4 | LCD_PERIPH_DATA5;
  42.                 break;
  43.         case GPIO_PIOD_BASE:
  44.                 pin_mask = LCD_PERIPH_DATA6 | LCD_PERIPH_DATA7 | LCD_PERIPH_DATA8 | LCD_PERIPH_DATA9 |
  45.                            LCD_PERIPH_DATA10 | LCD_PERIPH_DATA11 | LCD_PERIPH_DATA12 | LCD_PERIPH_DATA13 |
  46.                            LCD_PERIPH_DATA14 | LCD_PERIPH_DATA15 | LCD_PERIPH_DATA16 | LCD_PERIPH_DATA17 |
  47.                            LCD_PERIPH_DATA18 | LCD_PERIPH_DATA19 | LCD_PERIPH_DATA20 |  LCD_PERIPH_DATA21 |
  48.                            LCD_PERIPH_DATA22 | LCD_PERIPH_DATA23;
  49.                 break;
  50.         default:
  51.                 printk("Unsupported PORT");
  52.         }
  53.  
  54.         return pin_mask;
  55. }
  56.  
  57. arch/avr32/mach-at32ap/at32ap700x.c
  58.                 if(data->get_pin_mask) {
  59.                         at32_select_periph2(GPIO_PIOC_BASE, data->get_pin_mask(GPIO_PIOC_BASE), GPIO_PERIPH_A, 0);
  60.                         at32_select_periph2(GPIO_PIOD_BASE, data->get_pin_mask(GPIO_PIOD_BASE), GPIO_PERIPH_A, 0);
  61.                 }