1 files changed, 105 insertions, 0 deletions
diff --git a/arch/arm/include/asm/mach-imx/mxc_i2c.h b/arch/arm/include/asm/mach-imx/mxc_i2c.h
new file mode 100644
index 0000000..81fd981
--- /dev/null
+++ b/arch/arm/include/asm/mach-imx/mxc_i2c.h
@@ -0,0 +1,105 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (C) 2011 Freescale Semiconductor, Inc. All Rights Reserved.
+ */
+#ifndef __ASM_ARCH_MXC_MXC_I2C_H__
+#define __ASM_ARCH_MXC_MXC_I2C_H__
+#include <asm-generic/gpio.h>
+#include <asm/mach-imx/iomux-v3.h>
+#if CONFIG_IS_ENABLED(CLK)
+#include <clk.h>
+#endif
+
+struct i2c_pin_ctrl {
+	iomux_v3_cfg_t i2c_mode;
+	iomux_v3_cfg_t gpio_mode;
+	unsigned char gp;
+	unsigned char spare;
+};
+
+struct i2c_pads_info {
+	struct i2c_pin_ctrl scl;
+	struct i2c_pin_ctrl sda;
+};
+
+/*
+ * Information about i2c controller
+ * struct mxc_i2c_bus - information about the i2c[x] bus
+ * @index: i2c bus index
+ * @base: Address of I2C bus controller
+ * @driver_data: Flags for different platforms, such as I2C_QUIRK_FLAG.
+ * @speed: Speed of I2C bus
+ * @pads_info: pinctrl info for this i2c bus, will be used when pinctrl is ok.
+ * The following two is only to be compatible with non-DM part.
+ * @idle_bus_fn: function to force bus idle
+ * @idle_bus_data: parameter for idle_bus_fun
+ * For DM:
+ * bus: The device structure for i2c bus controller
+ * scl-gpio: specify the gpio related to SCL pin
+ * sda-gpio: specify the gpio related to SDA pin
+ */
+struct mxc_i2c_bus {
+	/*
+	 * board file can use this index to locate which i2c_pads_info is for
+	 * i2c_idle_bus. When pinmux is implement, this entry can be
+	 * discarded. Here we do not use dev->seq, because we do not want to
+	 * export device to board file.
+	 */
+	int index;
+	ulong base;
+	ulong driver_data;
+	int speed;
+	struct i2c_pads_info *pads_info;
+#if CONFIG_IS_ENABLED(CLK)
+	struct clk per_clk;
+#endif
+#ifndef CONFIG_DM_I2C
+	int (*idle_bus_fn)(void *p);
+	void *idle_bus_data;
+#else
+	struct udevice *bus;
+	/* Use gpio to force bus idle when bus state is abnormal */
+	struct gpio_desc scl_gpio;
+	struct gpio_desc sda_gpio;
+#endif
+};
+
+#if defined(CONFIG_MX6QDL)
+#define I2C_PADS(name, scl_i2c, scl_gpio, scl_gp, sda_i2c, sda_gpio, sda_gp) \
+	struct i2c_pads_info mx6q_##name = {		\
+		.scl = {				\
+			.i2c_mode = MX6Q_##scl_i2c,	\
+			.gpio_mode = MX6Q_##scl_gpio,	\
+			.gp = scl_gp,			\
+		},					\
+		.sda = {				\
+			.i2c_mode = MX6Q_##sda_i2c,	\
+			.gpio_mode = MX6Q_##sda_gpio,	\
+			.gp = sda_gp,			\
+		}					\
+	};						\
+	struct i2c_pads_info mx6s_##name = {		\
+		.scl = {				\
+			.i2c_mode = MX6DL_##scl_i2c,	\
+			.gpio_mode = MX6DL_##scl_gpio,	\
+			.gp = scl_gp,			\
+		},					\
+		.sda = {				\
+			.i2c_mode = MX6DL_##sda_i2c,	\
+			.gpio_mode = MX6DL_##sda_gpio,	\
+			.gp = sda_gp,			\
+		}					\
+	};
+
+
+#define I2C_PADS_INFO(name)	\
+	(is_mx6dq() || is_mx6dqp()) ? &mx6q_##name : &mx6s_##name
+#endif
+
+int setup_i2c(unsigned i2c_index, int speed, int slave_addr,
+	      struct i2c_pads_info *p);
+void bus_i2c_init(int index, int speed, int slave_addr,
+		int (*idle_bus_fn)(void *p), void *p);
+int force_idle_bus(void *priv);
+int i2c_idle_bus(struct mxc_i2c_bus *i2c_bus);
+#endif