1 // SPDX-License-Identifier: GPL-2.0-only
25  * The Device Configuration and UART Configuration Registers
26  * for each UART channel take 1KB of memory address space.
50 	unsigned int pin = exar_gpio->first_pin + (offset % 16);  in exar_offset_to_sel_addr()
54 	return addr + (cascaded ? exar_gpio->cascaded_offset : 0);  in exar_offset_to_sel_addr()
60 	unsigned int pin = exar_gpio->first_pin + (offset % 16);  in exar_offset_to_lvl_addr()
64 	return addr + (cascaded ? exar_gpio->cascaded_offset : 0);  in exar_offset_to_lvl_addr()
70 	unsigned int pin = exar_gpio->first_pin + (offset % 16);  in exar_offset_to_bit()
81 	if (regmap_test_bits(exar_gpio->regmap, addr, BIT(bit)))  in exar_get_direction()
93 	return !!(regmap_test_bits(exar_gpio->regmap, addr, BIT(bit)));  in exar_get_value()
108 	regmap_write_bits(exar_gpio->regmap, addr, BIT(bit), bit_value);  in exar_set_value()
119 	regmap_clear_bits(exar_gpio->regmap, addr, BIT(bit));  in exar_direction_output()
130 	regmap_set_bits(exar_gpio->regmap, addr, BIT(bit));  in exar_direction_input()
139 	ida_free(&ida_index, exar_gpio->index);  in exar_devm_ida_free()
143 	.name		= "exar-gpio",
151 	struct device *dev = &pdev->dev;  in gpio_exar_probe()
152 	struct pci_dev *pcidev = to_pci_dev(dev->parent);  in gpio_exar_probe()
159 	 * The UART driver must have mapped region 0 prior to registering this  in gpio_exar_probe()
160 	 * device - use it.  in gpio_exar_probe()
164 		return -ENOMEM;  in gpio_exar_probe()
166 	ret = device_property_read_u32(dev, "exar,first-pin", &first_pin);  in gpio_exar_probe()
176 		return -ENOMEM;  in gpio_exar_probe()
181 	 * PCI Device ID is the number of its UART channels.  in gpio_exar_probe()
183 	if (pcidev->device & GENMASK(15, 12)) {  in gpio_exar_probe()
185 		exar_gpio->cascaded_offset = (pcidev->device & GENMASK(3, 0)) *  in gpio_exar_probe()
191 	 * the regmap has a clock attached which is not the case here).  in gpio_exar_probe()
193 	exar_gpio->regmap = devm_regmap_init_mmio(dev, p, &exar_regmap_config);  in gpio_exar_probe()
194 	if (IS_ERR(exar_gpio->regmap))  in gpio_exar_probe()
195 		return PTR_ERR(exar_gpio->regmap);  in gpio_exar_probe()
205 	sprintf(exar_gpio->name, "exar_gpio%d", index);  in gpio_exar_probe()
206 	exar_gpio->gpio_chip.label = exar_gpio->name;  in gpio_exar_probe()
207 	exar_gpio->gpio_chip.parent = dev;  in gpio_exar_probe()
208 	exar_gpio->gpio_chip.direction_output = exar_direction_output;  in gpio_exar_probe()
209 	exar_gpio->gpio_chip.direction_input = exar_direction_input;  in gpio_exar_probe()
210 	exar_gpio->gpio_chip.get_direction = exar_get_direction;  in gpio_exar_probe()
211 	exar_gpio->gpio_chip.get = exar_get_value;  in gpio_exar_probe()
212 	exar_gpio->gpio_chip.set = exar_set_value;  in gpio_exar_probe()
213 	exar_gpio->gpio_chip.base = -1;  in gpio_exar_probe()
214 	exar_gpio->gpio_chip.ngpio = ngpios;  in gpio_exar_probe()
215 	exar_gpio->index = index;  in gpio_exar_probe()
216 	exar_gpio->first_pin = first_pin;  in gpio_exar_probe()
218 	ret = devm_gpiochip_add_data(dev, &exar_gpio->gpio_chip, exar_gpio);  in gpio_exar_probe()