drivers: i2c_nrfx_twi_rtio: Fix multi-writes with OP_TRANSACTION flag

This patch establishes proper handling of RTIO OPs with multiple write
requests in the same transfer (as in: including OP_TRANSACTION flag).
An example of this is captured in test_ram_rtio_write_with_transaction
test). This patch makes that testcase pass for i2c_nrfx_twi_rtio.

Signed-off-by: Luis Ubieda <[email protected]>

Author: ubieda

drivers/i2c/i2c_nrfx_twi_rtio.c

@@ -41,14 +41,16 @@ static bool i2c_nrfx_twi_rtio_msg_start(const struct device *dev, uint8_t flags,
 	struct i2c_nrfx_twi_rtio_data *const dev_data = dev->data;
 	struct i2c_rtio *ctx = dev_data->ctx;
 	int ret = 0;
+	bool more_msgs = (rtio_txn_next(ctx->txn_curr) != NULL) &&
+			 ((ctx->txn_curr->next->sqe.iodev_flags & RTIO_IODEV_I2C_RESTART) == 0);
 
 	/** Enabling while already enabled ends up in a failed assertion: skip it. */
 	if (!dev_data->twi_enabled) {
 		nrfx_twi_enable(&config->twi);
 		dev_data->twi_enabled = true;
 	}
 
-	ret = i2c_nrfx_twi_msg_transfer(dev, flags, buf, buf_len, i2c_addr, false);
+	ret = i2c_nrfx_twi_msg_transfer(dev, flags, buf, buf_len, i2c_addr, more_msgs);
 	if (ret != 0) {
 		nrfx_twi_disable(&config->twi);
 		dev_data->twi_enabled = false;