arch/arm/include/asm/arch-u8500/db8500_gpio.h

   1 /*
   2  * Structures and registers for GPIO access in the Nomadik SoC
   3  *
   4  * Code ported from Nomadik GPIO driver in ST-Ericsson Linux kernel code.
   5  * The purpose is that GPIO config found in kernel should work by simply
   6  * copy-paste it to U-boot.
   7  *
   8  * Ported to U-boot by:
   9  * Copyright (C) 2010 Joakim Axelsson <joakim.axelsson AT stericsson.com>
  10  * Copyright (C) 2008 STMicroelectronics
  11  *     Author: Prafulla WADASKAR <prafulla.wadaskar@st.com>
  12  * Copyright (C) 2009 Alessandro Rubini <rubini@unipv.it>
  13  *
  14  * This program is free software; you can redistribute it and/or modify
  15  * it under the terms of the GNU General Public License version 2 as
  16  * published by the Free Software Foundation.
  17  */
  18
  19 #ifndef __DB8500_GPIO_H__
  20 #define __DB8500_GPIO_H__
  21
  22 /* Alternate functions: function C is set in hw by setting both A and B */
  23 enum db8500_gpio_alt {
  24         DB8500_GPIO_ALT_GPIO = 0,
  25         DB8500_GPIO_ALT_A = 1,
  26         DB8500_GPIO_ALT_B = 2,
  27         DB8500_GPIO_ALT_C = (DB8500_GPIO_ALT_A | DB8500_GPIO_ALT_B)
  28 };
  29
  30 enum db8500_gpio_pull {
  31         DB8500_GPIO_PULL_NONE,
  32         DB8500_GPIO_PULL_UP,
  33         DB8500_GPIO_PULL_DOWN
  34 };
  35
  36 void db8500_gpio_set_pull(unsigned gpio, enum db8500_gpio_pull pull);
  37 void db8500_gpio_make_input(unsigned gpio);
  38 int db8500_gpio_get_input(unsigned gpio);
  39 void db8500_gpio_make_output(unsigned gpio, int val);
  40 void db8500_gpio_set_output(unsigned gpio, int val);
  41
  42 #endif /* __DB8500_GPIO_H__ */