34 #define I2C_CLR_BUS_SCL_NUM 9		/* Number of SCL clocks to restore SDA signal */
35 #define I2C_CLR_BUS_HALF_PERIOD_US 5	/* Period of SCL clock to restore SDA signal */
81 	const struct i2c_esp32_pin sda;  member
159 	gpio_pin_set_dt(&config->sda.gpio, 1);  in i2c_esp32_config_pin()
160 	ret = gpio_pin_configure_dt(&config->sda.gpio, GPIO_PULL_UP | GPIO_OUTPUT | GPIO_INPUT);  in i2c_esp32_config_pin()
161 	esp_rom_gpio_matrix_out(config->sda.gpio.pin, config->sda.sig_out, 0, 0);  in i2c_esp32_config_pin()
162 	esp_rom_gpio_matrix_in(config->sda.gpio.pin, config->sda.sig_in, 0);  in i2c_esp32_config_pin()
173 /* Some slave device will die by accident and keep the SDA in low level,
175  * Slave mode of ESP32 might also get in wrong state that held the SDA low,
188 	gpio_pin_configure_dt(&config->sda.gpio, GPIO_OUTPUT | GPIO_INPUT);  in i2c_master_clear_bus()
190 	/* the SLAVE device is controlling SDA. If the slave is sending a stream of ZERO bytes, */  in i2c_master_clear_bus()
191 	/* it will only release SDA during the  ACK bit period. So, this reset code needs */  in i2c_master_clear_bus()
194 	gpio_pin_set_dt(&config->sda.gpio, 1);  in i2c_master_clear_bus()
196 	while (!gpio_pin_get_dt(&config->sda.gpio) && (i++ < I2C_CLR_BUS_SCL_NUM)) {  in i2c_master_clear_bus()
202 	gpio_pin_set_dt(&config->sda.gpio, 0); /* setup for STOP */  in i2c_master_clear_bus()
205 	gpio_pin_set_dt(&config->sda.gpio, 1); /* STOP, SDA low -> high while SCL is HIGH */  in i2c_master_clear_bus()
384 		/* If the I2C slave is powered off or the SDA/SCL is */  in i2c_esp32_transmit()
746 	if (!gpio_is_ready_dt(&config->sda.gpio)) {  in i2c_esp32_init()
747 		LOG_ERR("SDA GPIO device is not ready");  in i2c_esp32_init()
793 	.sda = {							\
849 #error "Missing <sda-gpios> and <scl-gpios> properties to build for this target."
853 #error "Properties <sda-gpios> and <scl-gpios> are not required for this target."
862 #error "Missing <sda-gpios> and <scl-gpios> properties to build for this target."
866 #error "Properties <sda-gpios> and <scl-gpios> are not required for this target."