arch/arm/include/asm/imx-common/mxc_i2c.h

   1 /*
   2  * Copyright (C) 2011 Freescale Semiconductor, Inc. All Rights Reserved.
   3  *
   4  * SPDX-License-Identifier:     GPL-2.0+
   5  */
   6 #ifndef __ASM_ARCH_MXC_MXC_I2C_H__
   7 #define __ASM_ARCH_MXC_MXC_I2C_H__
   8 #include <asm/imx-common/iomux-v3.h>
   9
  10 struct i2c_pin_ctrl {
  11         iomux_v3_cfg_t i2c_mode;
  12         iomux_v3_cfg_t gpio_mode;
  13         unsigned char gp;
  14         unsigned char spare;
  15 };
  16
  17 struct i2c_pads_info {
  18         struct i2c_pin_ctrl scl;
  19         struct i2c_pin_ctrl sda;
  20 };
  21
  22 #if defined(CONFIG_SOC_MX6QDL)
  23 #define I2C_PADS(name, scl_i2c, scl_gpio, scl_gp, sda_i2c, sda_gpio, sda_gp) \
  24         struct i2c_pads_info mx6q_##name = {            \
  25                 .scl = {                                \
  26                         .i2c_mode = MX6Q_##scl_i2c,     \
  27                         .gpio_mode = MX6Q_##scl_gpio,   \
  28                         .gp = scl_gp,                   \
  29                 },                                      \
  30                 .sda = {                                \
  31                         .i2c_mode = MX6Q_##sda_i2c,     \
  32                         .gpio_mode = MX6Q_##sda_gpio,   \
  33                         .gp = sda_gp,                   \
  34                 }                                       \
  35         };                                              \
  36         struct i2c_pads_info mx6s_##name = {            \
  37                 .scl = {                                \
  38                         .i2c_mode = MX6DL_##scl_i2c,    \
  39                         .gpio_mode = MX6DL_##scl_gpio,  \
  40                         .gp = scl_gp,                   \
  41                 },                                      \
  42                 .sda = {                                \
  43                         .i2c_mode = MX6DL_##sda_i2c,    \
  44                         .gpio_mode = MX6DL_##sda_gpio,  \
  45                         .gp = sda_gp,                   \
  46                 }                                       \
  47         };
  48
  49
  50 #define I2C_PADS_INFO(name)     \
  51         (is_cpu_type(MXC_CPU_MX6Q) || is_cpu_type(MXC_CPU_MX6D)) ? \
  52                                         &mx6q_##name : &mx6s_##name
  53 #endif
  54
  55 int setup_i2c(unsigned i2c_index, int speed, int slave_addr,
  56               struct i2c_pads_info *p);
  57 void bus_i2c_init(void *base, int speed, int slave_addr,
  58                 int (*idle_bus_fn)(void *p), void *p);
  59 int bus_i2c_read(void *base, uchar chip, uint addr, int alen, uchar *buf,
  60                 int len);
  61 int bus_i2c_write(void *base, uchar chip, uint addr, int alen,
  62                 const uchar *buf, int len);
  63 #endif