gpio.h 1.8 KB

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  1. /*
  2. * linux/include/asm-arm/arch-sa1100/gpio.h
  3. *
  4. * SA1100 GPIO wrappers for arch-neutral GPIO calls
  5. *
  6. * Written by Philipp Zabel <philipp.zabel@gmail.com>
  7. *
  8. * This program is free software; you can redistribute it and/or modify
  9. * it under the terms of the GNU General Public License as published by
  10. * the Free Software Foundation; either version 2 of the License, or
  11. * (at your option) any later version.
  12. *
  13. * This program is distributed in the hope that it will be useful,
  14. * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  16. * GNU General Public License for more details.
  17. *
  18. * You should have received a copy of the GNU General Public License
  19. * along with this program; if not, write to the Free Software
  20. * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  21. *
  22. */
  23. #ifndef __ASM_ARCH_SA1100_GPIO_H
  24. #define __ASM_ARCH_SA1100_GPIO_H
  25. #include <asm/hardware.h>
  26. #include <asm/irq.h>
  27. static inline int gpio_request(unsigned gpio, const char *label)
  28. {
  29. return 0;
  30. }
  31. static inline void gpio_free(unsigned gpio)
  32. {
  33. return;
  34. }
  35. extern int gpio_direction_input(unsigned gpio);
  36. extern int gpio_direction_output(unsigned gpio, int value);
  37. static inline int gpio_get_value(unsigned gpio)
  38. {
  39. return GPLR & GPIO_GPIO(gpio);
  40. }
  41. static inline void gpio_set_value(unsigned gpio, int value)
  42. {
  43. if (value)
  44. GPSR = GPIO_GPIO(gpio);
  45. else
  46. GPCR = GPIO_GPIO(gpio);
  47. }
  48. #include <asm-generic/gpio.h> /* cansleep wrappers */
  49. static inline unsigned gpio_to_irq(unsigned gpio)
  50. {
  51. if (gpio < 11)
  52. return IRQ_GPIO0 + gpio;
  53. else
  54. return IRQ_GPIO11 - 11 + gpio;
  55. }
  56. static inline unsigned irq_to_gpio(unsigned irq)
  57. {
  58. if (irq < IRQ_GPIO11_27)
  59. return irq - IRQ_GPIO0;
  60. else
  61. return irq - IRQ_GPIO11 + 11;
  62. }
  63. #endif