1 // SPDX-License-Identifier: GPL-2.0-only
5  *  Copyright (C) 2012-2017 ASPEED Technology Inc.
28  * The aspeed chip provides a single hardware interrupt for all of the I2C
29  * busses, so we use a dummy interrupt chip to translate this single interrupt
30  * into multiple interrupts, each associated with a single I2C bus.
35 	struct irq_chip *chip = irq_desc_get_chip(desc);  in aspeed_i2c_ic_irq_handler()  local
39 	chained_irq_enter(chip, desc);  in aspeed_i2c_ic_irq_handler()
40 	status = readl(i2c_ic->base);  in aspeed_i2c_ic_irq_handler()
42 		bus_irq = irq_find_mapping(i2c_ic->irq_domain, bit);  in aspeed_i2c_ic_irq_handler()
45 	chained_irq_exit(chip, desc);  in aspeed_i2c_ic_irq_handler()
50  * since we are using a dummy interrupt chip.
56 	irq_set_chip_data(irq, domain->host_data);  in aspeed_i2c_ic_map_irq_domain()
73 		return -ENOMEM;  in aspeed_i2c_ic_of_init()
75 	i2c_ic->base = of_iomap(node, 0);  in aspeed_i2c_ic_of_init()
76 	if (!i2c_ic->base) {  in aspeed_i2c_ic_of_init()
77 		ret = -ENOMEM;  in aspeed_i2c_ic_of_init()
81 	i2c_ic->parent_irq = irq_of_parse_and_map(node, 0);  in aspeed_i2c_ic_of_init()
82 	if (i2c_ic->parent_irq < 0) {  in aspeed_i2c_ic_of_init()
83 		ret = i2c_ic->parent_irq;  in aspeed_i2c_ic_of_init()
87 	i2c_ic->irq_domain = irq_domain_add_linear(node, ASPEED_I2C_IC_NUM_BUS,  in aspeed_i2c_ic_of_init()
90 	if (!i2c_ic->irq_domain) {  in aspeed_i2c_ic_of_init()
91 		ret = -ENOMEM;  in aspeed_i2c_ic_of_init()
95 	i2c_ic->irq_domain->name = "aspeed-i2c-domain";  in aspeed_i2c_ic_of_init()
97 	irq_set_chained_handler_and_data(i2c_ic->parent_irq,  in aspeed_i2c_ic_of_init()
100 	pr_info("i2c controller registered, irq %d\n", i2c_ic->parent_irq);  in aspeed_i2c_ic_of_init()
105 	iounmap(i2c_ic->base);  in aspeed_i2c_ic_of_init()
111 IRQCHIP_DECLARE(ast2400_i2c_ic, "aspeed,ast2400-i2c-ic", aspeed_i2c_ic_of_init);
112 IRQCHIP_DECLARE(ast2500_i2c_ic, "aspeed,ast2500-i2c-ic", aspeed_i2c_ic_of_init);