1 // SPDX-License-Identifier: GPL-2.0-only
5  *  Copyright (C) 2012-2017 ASPEED Technology Inc.
163 	/* Multi-master */
179 	spin_lock_irqsave(&bus->lock, flags);  in aspeed_i2c_recover_bus()
180 	command = readl(bus->base + ASPEED_I2C_CMD_REG);  in aspeed_i2c_recover_bus()
186 		dev_dbg(bus->dev, "SCL hung (state %x), attempting recovery\n",  in aspeed_i2c_recover_bus()
189 		reinit_completion(&bus->cmd_complete);  in aspeed_i2c_recover_bus()
190 		writel(ASPEED_I2CD_M_STOP_CMD, bus->base + ASPEED_I2C_CMD_REG);  in aspeed_i2c_recover_bus()
191 		spin_unlock_irqrestore(&bus->lock, flags);  in aspeed_i2c_recover_bus()
194 				&bus->cmd_complete, bus->adap.timeout);  in aspeed_i2c_recover_bus()
196 		spin_lock_irqsave(&bus->lock, flags);  in aspeed_i2c_recover_bus()
199 		else if (bus->cmd_err)  in aspeed_i2c_recover_bus()
202 		else if (!(readl(bus->base + ASPEED_I2C_CMD_REG) &  in aspeed_i2c_recover_bus()
207 		dev_dbg(bus->dev, "SDA hung (state %x), attempting recovery\n",  in aspeed_i2c_recover_bus()
210 		reinit_completion(&bus->cmd_complete);  in aspeed_i2c_recover_bus()
213 		       bus->base + ASPEED_I2C_CMD_REG);  in aspeed_i2c_recover_bus()
214 		spin_unlock_irqrestore(&bus->lock, flags);  in aspeed_i2c_recover_bus()
217 				&bus->cmd_complete, bus->adap.timeout);  in aspeed_i2c_recover_bus()
219 		spin_lock_irqsave(&bus->lock, flags);  in aspeed_i2c_recover_bus()
222 		else if (bus->cmd_err)  in aspeed_i2c_recover_bus()
225 		else if (!(readl(bus->base + ASPEED_I2C_CMD_REG) &  in aspeed_i2c_recover_bus()
231 	spin_unlock_irqrestore(&bus->lock, flags);  in aspeed_i2c_recover_bus()
236 	spin_unlock_irqrestore(&bus->lock, flags);  in aspeed_i2c_recover_bus()
245 	struct i2c_client *slave = bus->slave;  in aspeed_i2c_slave_irq()
252 	command = readl(bus->base + ASPEED_I2C_CMD_REG);  in aspeed_i2c_slave_irq()
257 		bus->slave_state = ASPEED_I2C_SLAVE_START;  in aspeed_i2c_slave_irq()
261 	if (bus->slave_state == ASPEED_I2C_SLAVE_INACTIVE)  in aspeed_i2c_slave_irq()
264 	dev_dbg(bus->dev, "slave irq status 0x%08x, cmd 0x%08x\n",  in aspeed_i2c_slave_irq()
269 		value = readl(bus->base + ASPEED_I2C_BYTE_BUF_REG) >> 8;  in aspeed_i2c_slave_irq()
271 		if (bus->slave_state == ASPEED_I2C_SLAVE_START) {  in aspeed_i2c_slave_irq()
273 				bus->slave_state =  in aspeed_i2c_slave_irq()
276 				bus->slave_state =  in aspeed_i2c_slave_irq()
285 		bus->slave_state = ASPEED_I2C_SLAVE_STOP;  in aspeed_i2c_slave_irq()
288 	    bus->slave_state == ASPEED_I2C_SLAVE_READ_PROCESSED) {  in aspeed_i2c_slave_irq()
290 		bus->slave_state = ASPEED_I2C_SLAVE_STOP;  in aspeed_i2c_slave_irq()
293 	switch (bus->slave_state) {  in aspeed_i2c_slave_irq()
296 			dev_err(bus->dev, "Unexpected ACK on read request.\n");  in aspeed_i2c_slave_irq()
297 		bus->slave_state = ASPEED_I2C_SLAVE_READ_PROCESSED;  in aspeed_i2c_slave_irq()
299 		writel(value, bus->base + ASPEED_I2C_BYTE_BUF_REG);  in aspeed_i2c_slave_irq()
300 		writel(ASPEED_I2CD_S_TX_CMD, bus->base + ASPEED_I2C_CMD_REG);  in aspeed_i2c_slave_irq()
304 			dev_err(bus->dev,  in aspeed_i2c_slave_irq()
310 		writel(value, bus->base + ASPEED_I2C_BYTE_BUF_REG);  in aspeed_i2c_slave_irq()
311 		writel(ASPEED_I2CD_S_TX_CMD, bus->base + ASPEED_I2C_CMD_REG);  in aspeed_i2c_slave_irq()
314 		bus->slave_state = ASPEED_I2C_SLAVE_WRITE_RECEIVED;  in aspeed_i2c_slave_irq()
321 			writel(ASPEED_I2CD_M_S_RX_CMD_LAST, bus->base + ASPEED_I2C_CMD_REG);  in aspeed_i2c_slave_irq()
328 		bus->slave_state = ASPEED_I2C_SLAVE_INACTIVE;  in aspeed_i2c_slave_irq()
334 		dev_err(bus->dev, "unknown slave_state: %d\n",  in aspeed_i2c_slave_irq()
335 			bus->slave_state);  in aspeed_i2c_slave_irq()
336 		bus->slave_state = ASPEED_I2C_SLAVE_INACTIVE;  in aspeed_i2c_slave_irq()
344 /* precondition: bus.lock has been acquired. */
348 	struct i2c_msg *msg = &bus->msgs[bus->msgs_index];  in aspeed_i2c_do_start()
357 	if (bus->slave_state != ASPEED_I2C_SLAVE_INACTIVE) {  in aspeed_i2c_do_start()
358 		bus->master_state = ASPEED_I2C_MASTER_PENDING;  in aspeed_i2c_do_start()
363 	bus->master_state = ASPEED_I2C_MASTER_START;  in aspeed_i2c_do_start()
364 	bus->buf_index = 0;  in aspeed_i2c_do_start()
366 	if (msg->flags & I2C_M_RD) {  in aspeed_i2c_do_start()
369 		if (msg->len == 1 && !(msg->flags & I2C_M_RECV_LEN))  in aspeed_i2c_do_start()
373 	writel(slave_addr, bus->base + ASPEED_I2C_BYTE_BUF_REG);  in aspeed_i2c_do_start()
374 	writel(command, bus->base + ASPEED_I2C_CMD_REG);  in aspeed_i2c_do_start()
377 /* precondition: bus.lock has been acquired. */
380 	bus->master_state = ASPEED_I2C_MASTER_STOP;  in aspeed_i2c_do_stop()
381 	writel(ASPEED_I2CD_M_STOP_CMD, bus->base + ASPEED_I2C_CMD_REG);  in aspeed_i2c_do_stop()
384 /* precondition: bus.lock has been acquired. */
387 	if (bus->msgs_index + 1 < bus->msgs_count) {  in aspeed_i2c_next_msg_or_stop()
388 		bus->msgs_index++;  in aspeed_i2c_next_msg_or_stop()
398 		return -EAGAIN;  in aspeed_i2c_is_irq_error()
401 		return -EBUSY;  in aspeed_i2c_is_irq_error()
403 		return -EPROTO;  in aspeed_i2c_is_irq_error()
416 		bus->master_state = ASPEED_I2C_MASTER_INACTIVE;  in aspeed_i2c_master_irq()
428 		dev_dbg(bus->dev, "received error interrupt: 0x%08x\n",  in aspeed_i2c_master_irq()
431 		if (bus->master_state != ASPEED_I2C_MASTER_INACTIVE) {  in aspeed_i2c_master_irq()
432 			bus->cmd_err = ret;  in aspeed_i2c_master_irq()
433 			bus->master_state = ASPEED_I2C_MASTER_INACTIVE;  in aspeed_i2c_master_irq()
439 	if (bus->master_state == ASPEED_I2C_MASTER_INACTIVE ||  in aspeed_i2c_master_irq()
440 	    bus->master_state == ASPEED_I2C_MASTER_PENDING)  in aspeed_i2c_master_irq()
444 	if (!bus->msgs) {  in aspeed_i2c_master_irq()
445 		dev_err(bus->dev, "bus in unknown state. irq_status: 0x%x\n",  in aspeed_i2c_master_irq()
447 		bus->cmd_err = -EIO;  in aspeed_i2c_master_irq()
448 		if (bus->master_state != ASPEED_I2C_MASTER_STOP &&  in aspeed_i2c_master_irq()
449 		    bus->master_state != ASPEED_I2C_MASTER_INACTIVE)  in aspeed_i2c_master_irq()
453 	msg = &bus->msgs[bus->msgs_index];  in aspeed_i2c_master_irq()
460 	if (bus->master_state == ASPEED_I2C_MASTER_START) {  in aspeed_i2c_master_irq()
470 			writel(readl(bus->base + ASPEED_I2C_CMD_REG) &  in aspeed_i2c_master_irq()
472 			       bus->base + ASPEED_I2C_CMD_REG);  in aspeed_i2c_master_irq()
473 			bus->master_state = ASPEED_I2C_MASTER_PENDING;  in aspeed_i2c_master_irq()
474 			dev_dbg(bus->dev,  in aspeed_i2c_master_irq()
481 				bus->cmd_err = -ENXIO;  in aspeed_i2c_master_irq()
482 				bus->master_state = ASPEED_I2C_MASTER_INACTIVE;  in aspeed_i2c_master_irq()
485 			pr_devel("no slave present at %02x\n", msg->addr);  in aspeed_i2c_master_irq()
487 			bus->cmd_err = -ENXIO;  in aspeed_i2c_master_irq()
492 		if (msg->len == 0) { /* SMBUS_QUICK */  in aspeed_i2c_master_irq()
496 		if (msg->flags & I2C_M_RD)  in aspeed_i2c_master_irq()
497 			bus->master_state = ASPEED_I2C_MASTER_RX_FIRST;  in aspeed_i2c_master_irq()
499 			bus->master_state = ASPEED_I2C_MASTER_TX_FIRST;  in aspeed_i2c_master_irq()
502 	switch (bus->master_state) {  in aspeed_i2c_master_irq()
505 			dev_dbg(bus->dev, "slave NACKed TX\n");  in aspeed_i2c_master_irq()
509 			dev_err(bus->dev, "slave failed to ACK TX\n");  in aspeed_i2c_master_irq()
515 		if (bus->buf_index < msg->len) {  in aspeed_i2c_master_irq()
516 			bus->master_state = ASPEED_I2C_MASTER_TX;  in aspeed_i2c_master_irq()
517 			writel(msg->buf[bus->buf_index++],  in aspeed_i2c_master_irq()
518 			       bus->base + ASPEED_I2C_BYTE_BUF_REG);  in aspeed_i2c_master_irq()
520 			       bus->base + ASPEED_I2C_CMD_REG);  in aspeed_i2c_master_irq()
532 			dev_err(bus->dev, "master failed to RX\n");  in aspeed_i2c_master_irq()
537 		recv_byte = readl(bus->base + ASPEED_I2C_BYTE_BUF_REG) >> 8;  in aspeed_i2c_master_irq()
538 		msg->buf[bus->buf_index++] = recv_byte;  in aspeed_i2c_master_irq()
540 		if (msg->flags & I2C_M_RECV_LEN) {  in aspeed_i2c_master_irq()
542 				bus->cmd_err = -EPROTO;  in aspeed_i2c_master_irq()
546 			msg->len = recv_byte +  in aspeed_i2c_master_irq()
547 					((msg->flags & I2C_CLIENT_PEC) ? 2 : 1);  in aspeed_i2c_master_irq()
548 			msg->flags &= ~I2C_M_RECV_LEN;  in aspeed_i2c_master_irq()
551 		if (bus->buf_index < msg->len) {  in aspeed_i2c_master_irq()
552 			bus->master_state = ASPEED_I2C_MASTER_RX;  in aspeed_i2c_master_irq()
554 			if (bus->buf_index + 1 == msg->len)  in aspeed_i2c_master_irq()
556 			writel(command, bus->base + ASPEED_I2C_CMD_REG);  in aspeed_i2c_master_irq()
563 			dev_err(bus->dev,  in aspeed_i2c_master_irq()
566 			bus->cmd_err = -EIO;  in aspeed_i2c_master_irq()
572 		bus->master_state = ASPEED_I2C_MASTER_INACTIVE;  in aspeed_i2c_master_irq()
575 		dev_err(bus->dev,  in aspeed_i2c_master_irq()
578 		bus->cmd_err = -EIO;  in aspeed_i2c_master_irq()
583 		bus->master_state = ASPEED_I2C_MASTER_INACTIVE;  in aspeed_i2c_master_irq()
584 		bus->cmd_err = -EINVAL;  in aspeed_i2c_master_irq()
588 	bus->cmd_err = -EIO;  in aspeed_i2c_master_irq()
592 	bus->msgs = NULL;  in aspeed_i2c_master_irq()
593 	if (bus->cmd_err)  in aspeed_i2c_master_irq()
594 		bus->master_xfer_result = bus->cmd_err;  in aspeed_i2c_master_irq()
596 		bus->master_xfer_result = bus->msgs_index + 1;  in aspeed_i2c_master_irq()
597 	complete(&bus->cmd_complete);  in aspeed_i2c_master_irq()
607 	spin_lock(&bus->lock);  in aspeed_i2c_bus_irq()
608 	irq_received = readl(bus->base + ASPEED_I2C_INTR_STS_REG);  in aspeed_i2c_bus_irq()
611 	       bus->base + ASPEED_I2C_INTR_STS_REG);  in aspeed_i2c_bus_irq()
612 	readl(bus->base + ASPEED_I2C_INTR_STS_REG);  in aspeed_i2c_bus_irq()
624 	if (bus->master_state != ASPEED_I2C_MASTER_INACTIVE &&  in aspeed_i2c_bus_irq()
625 	    bus->master_state != ASPEED_I2C_MASTER_PENDING) {  in aspeed_i2c_bus_irq()
642 	if (bus->master_state == ASPEED_I2C_MASTER_PENDING &&  in aspeed_i2c_bus_irq()
643 	    bus->slave_state == ASPEED_I2C_SLAVE_INACTIVE)  in aspeed_i2c_bus_irq()
651 		dev_err(bus->dev,  in aspeed_i2c_bus_irq()
658 		       bus->base + ASPEED_I2C_INTR_STS_REG);  in aspeed_i2c_bus_irq()
659 		readl(bus->base + ASPEED_I2C_INTR_STS_REG);  in aspeed_i2c_bus_irq()
661 	spin_unlock(&bus->lock);  in aspeed_i2c_bus_irq()
671 	spin_lock_irqsave(&bus->lock, flags);  in aspeed_i2c_master_xfer()
672 	bus->cmd_err = 0;  in aspeed_i2c_master_xfer()
675 	if (!bus->multi_master &&  in aspeed_i2c_master_xfer()
676 	    (readl(bus->base + ASPEED_I2C_CMD_REG) &  in aspeed_i2c_master_xfer()
680 		spin_unlock_irqrestore(&bus->lock, flags);  in aspeed_i2c_master_xfer()
684 		spin_lock_irqsave(&bus->lock, flags);  in aspeed_i2c_master_xfer()
687 	bus->cmd_err = 0;  in aspeed_i2c_master_xfer()
688 	bus->msgs = msgs;  in aspeed_i2c_master_xfer()
689 	bus->msgs_index = 0;  in aspeed_i2c_master_xfer()
690 	bus->msgs_count = num;  in aspeed_i2c_master_xfer()
692 	reinit_completion(&bus->cmd_complete);  in aspeed_i2c_master_xfer()
694 	spin_unlock_irqrestore(&bus->lock, flags);  in aspeed_i2c_master_xfer()
696 	time_left = wait_for_completion_timeout(&bus->cmd_complete,  in aspeed_i2c_master_xfer()
697 						bus->adap.timeout);  in aspeed_i2c_master_xfer()
704 		if (bus->multi_master &&  in aspeed_i2c_master_xfer()
705 		    (readl(bus->base + ASPEED_I2C_CMD_REG) &  in aspeed_i2c_master_xfer()
713 		spin_lock_irqsave(&bus->lock, flags);  in aspeed_i2c_master_xfer()
714 		if (bus->master_state == ASPEED_I2C_MASTER_PENDING)  in aspeed_i2c_master_xfer()
715 			bus->master_state = ASPEED_I2C_MASTER_INACTIVE;  in aspeed_i2c_master_xfer()
716 		spin_unlock_irqrestore(&bus->lock, flags);  in aspeed_i2c_master_xfer()
718 		return -ETIMEDOUT;  in aspeed_i2c_master_xfer()
721 	return bus->master_xfer_result;  in aspeed_i2c_master_xfer()
730 /* precondition: bus.lock has been acquired. */
743 	writel(addr_reg_val, bus->base + ASPEED_I2C_DEV_ADDR_REG);  in __aspeed_i2c_reg_slave()
746 	func_ctrl_reg_val = readl(bus->base + ASPEED_I2C_FUN_CTRL_REG);  in __aspeed_i2c_reg_slave()
748 	writel(func_ctrl_reg_val, bus->base + ASPEED_I2C_FUN_CTRL_REG);  in __aspeed_i2c_reg_slave()
753 	struct aspeed_i2c_bus *bus = i2c_get_adapdata(client->adapter);  in aspeed_i2c_reg_slave()
756 	spin_lock_irqsave(&bus->lock, flags);  in aspeed_i2c_reg_slave()
757 	if (bus->slave) {  in aspeed_i2c_reg_slave()
758 		spin_unlock_irqrestore(&bus->lock, flags);  in aspeed_i2c_reg_slave()
759 		return -EINVAL;  in aspeed_i2c_reg_slave()
762 	__aspeed_i2c_reg_slave(bus, client->addr);  in aspeed_i2c_reg_slave()
764 	bus->slave = client;  in aspeed_i2c_reg_slave()
765 	bus->slave_state = ASPEED_I2C_SLAVE_INACTIVE;  in aspeed_i2c_reg_slave()
766 	spin_unlock_irqrestore(&bus->lock, flags);  in aspeed_i2c_reg_slave()
773 	struct aspeed_i2c_bus *bus = i2c_get_adapdata(client->adapter);  in aspeed_i2c_unreg_slave()
777 	spin_lock_irqsave(&bus->lock, flags);  in aspeed_i2c_unreg_slave()
778 	if (!bus->slave) {  in aspeed_i2c_unreg_slave()
779 		spin_unlock_irqrestore(&bus->lock, flags);  in aspeed_i2c_unreg_slave()
780 		return -EINVAL;  in aspeed_i2c_unreg_slave()
784 	func_ctrl_reg_val = readl(bus->base + ASPEED_I2C_FUN_CTRL_REG);  in aspeed_i2c_unreg_slave()
786 	writel(func_ctrl_reg_val, bus->base + ASPEED_I2C_FUN_CTRL_REG);  in aspeed_i2c_unreg_slave()
788 	bus->slave = NULL;  in aspeed_i2c_unreg_slave()
789 	spin_unlock_irqrestore(&bus->lock, flags);  in aspeed_i2c_unreg_slave()
836 	 * clk_low >= clk_low_max / 2 - 1 when possible; this last constraint  in aspeed_i2c_get_clk_reg_val()
840 			ilog2((divisor - 1) / clk_high_low_max) + 1 : 0;  in aspeed_i2c_get_clk_reg_val()
850 		tmp = (divisor + (1 << base_clk_divisor) - 1)  in aspeed_i2c_get_clk_reg_val()
853 		clk_high = tmp - clk_low;  in aspeed_i2c_get_clk_reg_val()
856 			clk_high--;  in aspeed_i2c_get_clk_reg_val()
859 			clk_low--;  in aspeed_i2c_get_clk_reg_val()
889 /* precondition: bus.lock has been acquired. */
894 	divisor = DIV_ROUND_UP(bus->parent_clk_frequency, bus->bus_frequency);  in aspeed_i2c_init_clk()
895 	clk_reg_val = readl(bus->base + ASPEED_I2C_AC_TIMING_REG1);  in aspeed_i2c_init_clk()
899 	clk_reg_val |= bus->get_clk_reg_val(bus->dev, divisor);  in aspeed_i2c_init_clk()
900 	writel(clk_reg_val, bus->base + ASPEED_I2C_AC_TIMING_REG1);  in aspeed_i2c_init_clk()
901 	writel(ASPEED_NO_TIMEOUT_CTRL, bus->base + ASPEED_I2C_AC_TIMING_REG2);  in aspeed_i2c_init_clk()
906 /* precondition: bus.lock has been acquired. */
914 	writel(0, bus->base + ASPEED_I2C_FUN_CTRL_REG);  in aspeed_i2c_init()
920 	if (of_property_read_bool(pdev->dev.of_node, "multi-master"))  in aspeed_i2c_init()
921 		bus->multi_master = true;  in aspeed_i2c_init()
926 	writel(readl(bus->base + ASPEED_I2C_FUN_CTRL_REG) | fun_ctrl_reg,  in aspeed_i2c_init()
927 	       bus->base + ASPEED_I2C_FUN_CTRL_REG);  in aspeed_i2c_init()
930 	/* If slave has already been registered, re-enable it. */  in aspeed_i2c_init()
931 	if (bus->slave)  in aspeed_i2c_init()
932 		__aspeed_i2c_reg_slave(bus, bus->slave->addr);  in aspeed_i2c_init()
936 	writel(ASPEED_I2CD_INTR_ALL, bus->base + ASPEED_I2C_INTR_CTRL_REG);  in aspeed_i2c_init()
943 	struct platform_device *pdev = to_platform_device(bus->dev);  in aspeed_i2c_reset()
947 	spin_lock_irqsave(&bus->lock, flags);  in aspeed_i2c_reset()
950 	writel(0, bus->base + ASPEED_I2C_INTR_CTRL_REG);  in aspeed_i2c_reset()
951 	writel(0xffffffff, bus->base + ASPEED_I2C_INTR_STS_REG);  in aspeed_i2c_reset()
955 	spin_unlock_irqrestore(&bus->lock, flags);  in aspeed_i2c_reset()
962 		.compatible = "aspeed,ast2400-i2c-bus",
966 		.compatible = "aspeed,ast2500-i2c-bus",
970 		.compatible = "aspeed,ast2600-i2c-bus",
985 	bus = devm_kzalloc(&pdev->dev, sizeof(*bus), GFP_KERNEL);  in aspeed_i2c_probe_bus()
987 		return -ENOMEM;  in aspeed_i2c_probe_bus()
990 	bus->base = devm_ioremap_resource(&pdev->dev, res);  in aspeed_i2c_probe_bus()
991 	if (IS_ERR(bus->base))  in aspeed_i2c_probe_bus()
992 		return PTR_ERR(bus->base);  in aspeed_i2c_probe_bus()
994 	parent_clk = devm_clk_get(&pdev->dev, NULL);  in aspeed_i2c_probe_bus()
997 	bus->parent_clk_frequency = clk_get_rate(parent_clk);  in aspeed_i2c_probe_bus()
999 	devm_clk_put(&pdev->dev, parent_clk);  in aspeed_i2c_probe_bus()
1001 	bus->rst = devm_reset_control_get_shared(&pdev->dev, NULL);  in aspeed_i2c_probe_bus()
1002 	if (IS_ERR(bus->rst)) {  in aspeed_i2c_probe_bus()
1003 		dev_err(&pdev->dev,  in aspeed_i2c_probe_bus()
1005 		return PTR_ERR(bus->rst);  in aspeed_i2c_probe_bus()
1007 	reset_control_deassert(bus->rst);  in aspeed_i2c_probe_bus()
1009 	ret = of_property_read_u32(pdev->dev.of_node,  in aspeed_i2c_probe_bus()
1010 				   "bus-frequency", &bus->bus_frequency);  in aspeed_i2c_probe_bus()
1012 		dev_err(&pdev->dev,  in aspeed_i2c_probe_bus()
1013 			"Could not read bus-frequency property\n");  in aspeed_i2c_probe_bus()
1014 		bus->bus_frequency = I2C_MAX_STANDARD_MODE_FREQ;  in aspeed_i2c_probe_bus()
1017 	match = of_match_node(aspeed_i2c_bus_of_table, pdev->dev.of_node);  in aspeed_i2c_probe_bus()
1019 		bus->get_clk_reg_val = aspeed_i2c_24xx_get_clk_reg_val;  in aspeed_i2c_probe_bus()
1021 		bus->get_clk_reg_val = (u32 (*)(struct device *, u32))  in aspeed_i2c_probe_bus()
1022 				match->data;  in aspeed_i2c_probe_bus()
1025 	spin_lock_init(&bus->lock);  in aspeed_i2c_probe_bus()
1026 	init_completion(&bus->cmd_complete);  in aspeed_i2c_probe_bus()
1027 	bus->adap.owner = THIS_MODULE;  in aspeed_i2c_probe_bus()
1028 	bus->adap.retries = 0;  in aspeed_i2c_probe_bus()
1029 	bus->adap.algo = &aspeed_i2c_algo;  in aspeed_i2c_probe_bus()
1030 	bus->adap.dev.parent = &pdev->dev;  in aspeed_i2c_probe_bus()
1031 	bus->adap.dev.of_node = pdev->dev.of_node;  in aspeed_i2c_probe_bus()
1032 	strscpy(bus->adap.name, pdev->name, sizeof(bus->adap.name));  in aspeed_i2c_probe_bus()
1033 	i2c_set_adapdata(&bus->adap, bus);  in aspeed_i2c_probe_bus()
1035 	bus->dev = &pdev->dev;  in aspeed_i2c_probe_bus()
1038 	writel(0, bus->base + ASPEED_I2C_INTR_CTRL_REG);  in aspeed_i2c_probe_bus()
1039 	writel(0xffffffff, bus->base + ASPEED_I2C_INTR_STS_REG);  in aspeed_i2c_probe_bus()
1048 	irq = irq_of_parse_and_map(pdev->dev.of_node, 0);  in aspeed_i2c_probe_bus()
1049 	ret = devm_request_irq(&pdev->dev, irq, aspeed_i2c_bus_irq,  in aspeed_i2c_probe_bus()
1050 			       0, dev_name(&pdev->dev), bus);  in aspeed_i2c_probe_bus()
1054 	ret = i2c_add_adapter(&bus->adap);  in aspeed_i2c_probe_bus()
1060 	dev_info(bus->dev, "i2c bus %d registered, irq %d\n",  in aspeed_i2c_probe_bus()
1061 		 bus->adap.nr, irq);  in aspeed_i2c_probe_bus()
1071 	spin_lock_irqsave(&bus->lock, flags);  in aspeed_i2c_remove_bus()
1074 	writel(0, bus->base + ASPEED_I2C_FUN_CTRL_REG);  in aspeed_i2c_remove_bus()
1075 	writel(0, bus->base + ASPEED_I2C_INTR_CTRL_REG);  in aspeed_i2c_remove_bus()
1077 	spin_unlock_irqrestore(&bus->lock, flags);  in aspeed_i2c_remove_bus()
1079 	reset_control_assert(bus->rst);  in aspeed_i2c_remove_bus()
1081 	i2c_del_adapter(&bus->adap);  in aspeed_i2c_remove_bus()
1090 		.name		= "aspeed-i2c-bus",