1 // SPDX-License-Identifier: GPL-2.0-only
3  * sl28cpld GPIO driver
9 #include <linux/gpio/driver.h>
10 #include <linux/gpio/regmap.h>
18 /* GPIO flavor */
25 /* input-only flavor */
28 /* output-only flavor */
50 				  struct gpio_regmap_config *config)  in sl28cpld_gpio_irq_init()  argument
54 	struct device *dev = &pdev->dev;  in sl28cpld_gpio_irq_init()
57 	if (!device_property_read_bool(dev, "interrupt-controller"))  in sl28cpld_gpio_irq_init()
66 		return -ENOMEM;  in sl28cpld_gpio_irq_init()
68 	irq_chip->name = "sl28cpld-gpio-irq";  in sl28cpld_gpio_irq_init()
69 	irq_chip->irqs = sl28cpld_gpio_irqs;  in sl28cpld_gpio_irq_init()
70 	irq_chip->num_irqs = ARRAY_SIZE(sl28cpld_gpio_irqs);  in sl28cpld_gpio_irq_init()
71 	irq_chip->num_regs = 1;  in sl28cpld_gpio_irq_init()
72 	irq_chip->status_base = base + GPIO_REG_IP;  in sl28cpld_gpio_irq_init()
73 	irq_chip->mask_base = base + GPIO_REG_IE;  in sl28cpld_gpio_irq_init()
74 	irq_chip->mask_invert = true;  in sl28cpld_gpio_irq_init()
75 	irq_chip->ack_base = base + GPIO_REG_IP;  in sl28cpld_gpio_irq_init()
78 					      config->regmap, irq,  in sl28cpld_gpio_irq_init()
84 	config->irq_domain = regmap_irq_get_domain(irq_data);  in sl28cpld_gpio_irq_init()
91 	struct gpio_regmap_config config = {0};  in sl28cpld_gpio_probe()  local
97 	if (!pdev->dev.parent)  in sl28cpld_gpio_probe()
98 		return -ENODEV;  in sl28cpld_gpio_probe()
100 	type = (uintptr_t)device_get_match_data(&pdev->dev);  in sl28cpld_gpio_probe()
102 		return -ENODEV;  in sl28cpld_gpio_probe()
104 	ret = device_property_read_u32(&pdev->dev, "reg", &base);  in sl28cpld_gpio_probe()
106 		return -EINVAL;  in sl28cpld_gpio_probe()
108 	regmap = dev_get_regmap(pdev->dev.parent, NULL);  in sl28cpld_gpio_probe()
110 		return -ENODEV;  in sl28cpld_gpio_probe()
112 	config.regmap = regmap;  in sl28cpld_gpio_probe()
113 	config.parent = &pdev->dev;  in sl28cpld_gpio_probe()
114 	config.ngpio = 8;  in sl28cpld_gpio_probe()
118 		config.reg_dat_base = base + GPIO_REG_IN;  in sl28cpld_gpio_probe()
119 		config.reg_set_base = base + GPIO_REG_OUT;  in sl28cpld_gpio_probe()
121 		config.reg_dir_out_base = GPIO_REGMAP_ADDR(base + GPIO_REG_DIR);  in sl28cpld_gpio_probe()
124 		ret = sl28cpld_gpio_irq_init(pdev, base, &config);  in sl28cpld_gpio_probe()
129 		config.reg_set_base = base + GPO_REG_OUT;  in sl28cpld_gpio_probe()
132 		config.reg_dat_base = base + GPI_REG_IN;  in sl28cpld_gpio_probe()
135 		dev_err(&pdev->dev, "unknown type %d\n", type);  in sl28cpld_gpio_probe()
136 		return -ENODEV;  in sl28cpld_gpio_probe()
139 	return PTR_ERR_OR_ZERO(devm_gpio_regmap_register(&pdev->dev, &config));  in sl28cpld_gpio_probe()
143 	{ .compatible = "kontron,sl28cpld-gpio", .data = (void *)SL28CPLD_GPIO },
144 	{ .compatible = "kontron,sl28cpld-gpi", .data = (void *)SL28CPLD_GPI },
145 	{ .compatible = "kontron,sl28cpld-gpo", .data = (void *)SL28CPLD_GPO },
153 		.name = "sl28cpld-gpio",
159 MODULE_DESCRIPTION("sl28cpld GPIO Driver");