1 /* SPDX-License-Identifier: GPL-2.0+ */ 2 /* 3 * Copyright (C) 2011 Freescale Semiconductor, Inc. All Rights Reserved. 4 */ 5 #ifndef __ASM_ARCH_MXC_MXC_I2C_H__ 6 #define __ASM_ARCH_MXC_MXC_I2C_H__ 7 #include <asm-generic/gpio.h> 8 #include <asm/mach-imx/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 /* 23 * Information about i2c controller 24 * struct mxc_i2c_bus - information about the i2c[x] bus 25 * @index: i2c bus index 26 * @base: Address of I2C bus controller 27 * @driver_data: Flags for different platforms, such as I2C_QUIRK_FLAG. 28 * @speed: Speed of I2C bus 29 * @pads_info: pinctrl info for this i2c bus, will be used when pinctrl is ok. 30 * The following two is only to be compatible with non-DM part. 31 * @idle_bus_fn: function to force bus idle 32 * @idle_bus_data: parameter for idle_bus_fun 33 * For DM: 34 * bus: The device structure for i2c bus controller 35 * scl-gpio: specify the gpio related to SCL pin 36 * sda-gpio: specify the gpio related to SDA pin 37 */ 38 struct mxc_i2c_bus { 39 /* 40 * board file can use this index to locate which i2c_pads_info is for 41 * i2c_idle_bus. When pinmux is implement, this entry can be 42 * discarded. Here we do not use dev->seq, because we do not want to 43 * export device to board file. 44 */ 45 int index; 46 ulong base; 47 ulong driver_data; 48 int speed; 49 struct i2c_pads_info *pads_info; 50 #ifndef CONFIG_DM_I2C 51 int (*idle_bus_fn)(void *p); 52 void *idle_bus_data; 53 #else 54 struct udevice *bus; 55 /* Use gpio to force bus idle when bus state is abnormal */ 56 struct gpio_desc scl_gpio; 57 struct gpio_desc sda_gpio; 58 #endif 59 }; 60 61 #if defined(CONFIG_MX6QDL) 62 #define I2C_PADS(name, scl_i2c, scl_gpio, scl_gp, sda_i2c, sda_gpio, sda_gp) \ 63 struct i2c_pads_info mx6q_##name = { \ 64 .scl = { \ 65 .i2c_mode = MX6Q_##scl_i2c, \ 66 .gpio_mode = MX6Q_##scl_gpio, \ 67 .gp = scl_gp, \ 68 }, \ 69 .sda = { \ 70 .i2c_mode = MX6Q_##sda_i2c, \ 71 .gpio_mode = MX6Q_##sda_gpio, \ 72 .gp = sda_gp, \ 73 } \ 74 }; \ 75 struct i2c_pads_info mx6s_##name = { \ 76 .scl = { \ 77 .i2c_mode = MX6DL_##scl_i2c, \ 78 .gpio_mode = MX6DL_##scl_gpio, \ 79 .gp = scl_gp, \ 80 }, \ 81 .sda = { \ 82 .i2c_mode = MX6DL_##sda_i2c, \ 83 .gpio_mode = MX6DL_##sda_gpio, \ 84 .gp = sda_gp, \ 85 } \ 86 }; 87 88 89 #define I2C_PADS_INFO(name) \ 90 (is_mx6dq() || is_mx6dqp()) ? &mx6q_##name : &mx6s_##name 91 #endif 92 93 int setup_i2c(unsigned i2c_index, int speed, int slave_addr, 94 struct i2c_pads_info *p); 95 void bus_i2c_init(int index, int speed, int slave_addr, 96 int (*idle_bus_fn)(void *p), void *p); 97 int force_idle_bus(void *priv); 98 int i2c_idle_bus(struct mxc_i2c_bus *i2c_bus); 99 #endif 100