136 static uint8_t i2c_imx_get_clk(struct mxc_i2c_bus *i2c_bus, unsigned int rate)  in i2c_imx_get_clk()  argument
153 	i2c_clk_rate = clk_get_rate(&i2c_bus->per_clk);  in i2c_imx_get_clk()
174 static int bus_i2c_set_bus_speed(struct mxc_i2c_bus *i2c_bus, int speed)  in bus_i2c_set_bus_speed()  argument
176 	ulong base = i2c_bus->base;  in bus_i2c_set_bus_speed()
177 	bool quirk = i2c_bus->driver_data & I2C_QUIRK_FLAG ? true : false;  in bus_i2c_set_bus_speed()
178 	u8 clk_idx = i2c_imx_get_clk(i2c_bus, speed);  in bus_i2c_set_bus_speed()
198 static int wait_for_sr_state(struct mxc_i2c_bus *i2c_bus, unsigned state)  in wait_for_sr_state()  argument
202 	bool quirk = i2c_bus->driver_data & I2C_QUIRK_FLAG ? true : false;  in wait_for_sr_state()
204 	ulong base = i2c_bus->base;  in wait_for_sr_state()
232 static int tx_byte(struct mxc_i2c_bus *i2c_bus, u8 byte)  in tx_byte()  argument
235 	int reg_shift = i2c_bus->driver_data & I2C_QUIRK_FLAG ?  in tx_byte()
237 	ulong base = i2c_bus->base;  in tx_byte()
242 	ret = wait_for_sr_state(i2c_bus, ST_IIF);  in tx_byte()
262 static void i2c_imx_stop(struct mxc_i2c_bus *i2c_bus)  in i2c_imx_stop()  argument
265 	int reg_shift = i2c_bus->driver_data & I2C_QUIRK_FLAG ?  in i2c_imx_stop()
267 	ulong base = i2c_bus->base;  in i2c_imx_stop()
272 	ret = wait_for_sr_state(i2c_bus, ST_BUS_IDLE);  in i2c_imx_stop()
281 static int i2c_init_transfer_(struct mxc_i2c_bus *i2c_bus, u8 chip,  in i2c_init_transfer_()  argument
286 	bool quirk = i2c_bus->driver_data & I2C_QUIRK_FLAG ? true : false;  in i2c_init_transfer_()
287 	ulong base = i2c_bus->base;  in i2c_init_transfer_()
308 	ret = wait_for_sr_state(i2c_bus, ST_BUS_IDLE);  in i2c_init_transfer_()
317 	ret = wait_for_sr_state(i2c_bus, ST_BUS_BUSY);  in i2c_init_transfer_()
326 		ret = tx_byte(i2c_bus, chip << 1);  in i2c_init_transfer_()
331 			ret = tx_byte(i2c_bus, (addr >> (alen * 8)) & 0xff);  in i2c_init_transfer_()
341 int i2c_idle_bus(struct mxc_i2c_bus *i2c_bus)  in i2c_idle_bus()  argument
343 	if (i2c_bus && i2c_bus->idle_bus_fn)  in i2c_idle_bus()
344 		return i2c_bus->idle_bus_fn(i2c_bus->idle_bus_data);  in i2c_idle_bus()
359 int i2c_idle_bus(struct mxc_i2c_bus *i2c_bus)  in i2c_idle_bus()  argument
361 	struct udevice *bus = i2c_bus->bus;  in i2c_idle_bus()
363 	struct gpio_desc *scl_gpio = &i2c_bus->scl_gpio;  in i2c_idle_bus()
364 	struct gpio_desc *sda_gpio = &i2c_bus->sda_gpio;  in i2c_idle_bus()
434 static int i2c_init_transfer(struct mxc_i2c_bus *i2c_bus, u8 chip,  in i2c_init_transfer()  argument
439 	int reg_shift = i2c_bus->driver_data & I2C_QUIRK_FLAG ?  in i2c_init_transfer()
442 	if (!i2c_bus->base)  in i2c_init_transfer()
446 		ret = i2c_init_transfer_(i2c_bus, chip, addr, alen);  in i2c_init_transfer()
449 		i2c_imx_stop(i2c_bus);  in i2c_init_transfer()
457 			writeb(I2CR_IDIS, i2c_bus->base + (I2CR << reg_shift));  in i2c_init_transfer()
459 		if (i2c_idle_bus(i2c_bus) < 0)  in i2c_init_transfer()
462 	printf("%s: give up i2c_regs=0x%lx\n", __func__, i2c_bus->base);  in i2c_init_transfer()
467 static int i2c_write_data(struct mxc_i2c_bus *i2c_bus, u8 chip, const u8 *buf,  in i2c_write_data()  argument
480 		ret = tx_byte(i2c_bus, buf[i]);  in i2c_write_data()
495 static int i2c_read_data(struct mxc_i2c_bus *i2c_bus, uchar chip, uchar *buf,  in i2c_read_data()  argument
501 	int reg_shift = i2c_bus->driver_data & I2C_QUIRK_FLAG ?  in i2c_read_data()
503 	ulong base = i2c_bus->base;  in i2c_read_data()
519 		ret = wait_for_sr_state(i2c_bus, ST_IIF);  in i2c_read_data()
522 			i2c_imx_stop(i2c_bus);  in i2c_read_data()
533 				i2c_imx_stop(i2c_bus);  in i2c_read_data()
562 		i2c_imx_stop(i2c_bus);  in i2c_read_data()
597 static int bus_i2c_read(struct mxc_i2c_bus *i2c_bus, u8 chip, u32 addr,  in bus_i2c_read()  argument
602 	int reg_shift = i2c_bus->driver_data & I2C_QUIRK_FLAG ?  in bus_i2c_read()
604 	ulong base = i2c_bus->base;  in bus_i2c_read()
606 	ret = i2c_init_transfer(i2c_bus, chip, addr, alen);  in bus_i2c_read()
616 	ret = tx_byte(i2c_bus, (chip << 1) | 1);  in bus_i2c_read()
618 		i2c_imx_stop(i2c_bus);  in bus_i2c_read()
622 	ret = i2c_read_data(i2c_bus, chip, buf, len, true);  in bus_i2c_read()
624 	i2c_imx_stop(i2c_bus);  in bus_i2c_read()
645 static int bus_i2c_write(struct mxc_i2c_bus *i2c_bus, u8 chip, u32 addr,  in bus_i2c_write()  argument
650 	ret = i2c_init_transfer(i2c_bus, chip, addr, alen);  in bus_i2c_write()
654 	ret = i2c_write_data(i2c_bus, chip, buf, len);  in bus_i2c_write()
656 	i2c_imx_stop(i2c_bus);  in bus_i2c_write()
875 	struct mxc_i2c_bus *i2c_bus = dev_get_priv(bus);
877 	return bus_i2c_set_bus_speed(i2c_bus, speed);
882 	struct mxc_i2c_bus *i2c_bus = dev_get_priv(bus);
888 	i2c_bus->driver_data = dev_get_driver_data(bus);
894 	i2c_bus->base = addr;
895 	i2c_bus->index = bus->seq;
896 	i2c_bus->bus = bus;
900 	ret = clk_get_by_index(bus, 0, &i2c_bus->per_clk);
905 	ret = clk_enable(&i2c_bus->per_clk);
922 		debug("i2c bus %d at 0x%2lx, no gpio pinctrl state.\n", bus->seq, i2c_bus->base);
925 				"scl-gpios", 0, &i2c_bus->scl_gpio,
928 				"sda-gpios", 0, &i2c_bus->sda_gpio,
930 		if (!dm_gpio_is_valid(&i2c_bus->sda_gpio) ||
931 		    !dm_gpio_is_valid(&i2c_bus->scl_gpio) ||
933 			dev_err(dev, "i2c bus %d at %lu, fail to request scl/sda gpio\n", bus->seq, i2c_bus->base);
944 	      bus->seq, i2c_bus->base,
945 	      i2c_bus->speed);
955 	struct mxc_i2c_bus *i2c_bus = dev_get_priv(bus);
957 	ret = i2c_init_transfer(i2c_bus, chip_addr, 0, 0);
963 	i2c_imx_stop(i2c_bus);
970 	struct mxc_i2c_bus *i2c_bus = dev_get_priv(bus);
972 	ulong base = i2c_bus->base;
973 	int reg_shift = i2c_bus->driver_data & I2C_QUIRK_FLAG ?
981 	ret = i2c_init_transfer(i2c_bus, msg->addr, 0, -1);
1004 			ret = tx_byte(i2c_bus, (msg->addr << 1) | msg_is_read);
1007 				i2c_imx_stop(i2c_bus);
1014 			ret = i2c_read_data(i2c_bus, msg->addr, msg->buf,
1018 			ret = i2c_write_data(i2c_bus, msg->addr, msg->buf,
1028 	i2c_imx_stop(i2c_bus);