1 // SPDX-License-Identifier: GPL-2.0
10 #include <linux/gpio/driver.h>
14 #include <dt-bindings/gpio/msc313-gpio.h>
15 #include <dt-bindings/interrupt-controller/arm-gic.h>
17 #define DRIVER_NAME "gpio-msc313"
25  * gpio state when resuming from suspend to memory.
222 MSC313_GPIO_CHIPDATA(msc313);
225  * Unlike the msc313(e) the ssd20xd have a bunch of pins
226  * that are actually called gpio probably because they
445  * of the registers that control the gpio.
490 	struct msc313_gpio *gpio = gpiochip_get_data(chip);  in msc313_gpio_set()  local
491 	u8 gpioreg = readb_relaxed(gpio->base + gpio->gpio_data->offsets[offset]);  in msc313_gpio_set()
498 	writeb_relaxed(gpioreg, gpio->base + gpio->gpio_data->offsets[offset]);  in msc313_gpio_set()
503 	struct msc313_gpio *gpio = gpiochip_get_data(chip);  in msc313_gpio_get()  local
505 	return readb_relaxed(gpio->base + gpio->gpio_data->offsets[offset]) & MSC313_GPIO_IN;  in msc313_gpio_get()
510 	struct msc313_gpio *gpio = gpiochip_get_data(chip);  in msc313_gpio_direction_input()  local
511 	u8 gpioreg = readb_relaxed(gpio->base + gpio->gpio_data->offsets[offset]);  in msc313_gpio_direction_input()
514 	writeb_relaxed(gpioreg, gpio->base + gpio->gpio_data->offsets[offset]);  in msc313_gpio_direction_input()
521 	struct msc313_gpio *gpio = gpiochip_get_data(chip);  in msc313_gpio_direction_output()  local
522 	u8 gpioreg = readb_relaxed(gpio->base + gpio->gpio_data->offsets[offset]);  in msc313_gpio_direction_output()
529 	writeb_relaxed(gpioreg, gpio->base + gpio->gpio_data->offsets[offset]);  in msc313_gpio_direction_output()
539 	gpiochip_disable_irq(gc, d->hwirq);  in msc313_gpio_irq_mask()
546 	gpiochip_enable_irq(gc, d->hwirq);  in msc313_gpio_irq_unmask()
555 	.name = "GPIO",
575 	struct irq_fwspec *fwspec = &gfwspec->fwspec;  in msc313_gpio_populate_parent_fwspec()
577 	fwspec->fwnode = gc->irq.parent_domain->fwnode;  in msc313_gpio_populate_parent_fwspec()
578 	fwspec->param_count = 3;  in msc313_gpio_populate_parent_fwspec()
579 	fwspec->param[0] = GIC_SPI;  in msc313_gpio_populate_parent_fwspec()
580 	fwspec->param[1] = parent_hwirq;  in msc313_gpio_populate_parent_fwspec()
581 	fwspec->param[2] = parent_type;  in msc313_gpio_populate_parent_fwspec()
593 	unsigned int offset = priv->gpio_data->offsets[child];  in msc313e_gpio_child_to_parent_hwirq()
602 		*parent = ((offset - OFF_SPI0_CZ) >> 2) + 28;  in msc313e_gpio_child_to_parent_hwirq()
606 	return -EINVAL;  in msc313e_gpio_child_to_parent_hwirq()
612 	struct msc313_gpio *gpio;  in msc313_gpio_probe()  local
617 	struct device *dev = &pdev->dev;  in msc313_gpio_probe()
621 		return -EINVAL;  in msc313_gpio_probe()
623 	parent_node = of_irq_find_parent(dev->of_node);  in msc313_gpio_probe()
625 		return -ENODEV;  in msc313_gpio_probe()
629 		return -ENODEV;  in msc313_gpio_probe()
631 	gpio = devm_kzalloc(dev, sizeof(*gpio), GFP_KERNEL);  in msc313_gpio_probe()
632 	if (!gpio)  in msc313_gpio_probe()
633 		return -ENOMEM;  in msc313_gpio_probe()
635 	gpio->gpio_data = match_data;  in msc313_gpio_probe()
637 	gpio->saved = devm_kcalloc(dev, gpio->gpio_data->num, sizeof(*gpio->saved), GFP_KERNEL);  in msc313_gpio_probe()
638 	if (!gpio->saved)  in msc313_gpio_probe()
639 		return -ENOMEM;  in msc313_gpio_probe()
641 	gpio->base = devm_platform_ioremap_resource(pdev, 0);  in msc313_gpio_probe()
642 	if (IS_ERR(gpio->base))  in msc313_gpio_probe()
643 		return PTR_ERR(gpio->base);  in msc313_gpio_probe()
645 	platform_set_drvdata(pdev, gpio);  in msc313_gpio_probe()
649 		return -ENOMEM;  in msc313_gpio_probe()
651 	gpiochip->label = DRIVER_NAME;  in msc313_gpio_probe()
652 	gpiochip->parent = dev;  in msc313_gpio_probe()
653 	gpiochip->request = gpiochip_generic_request;  in msc313_gpio_probe()
654 	gpiochip->free = gpiochip_generic_free;  in msc313_gpio_probe()
655 	gpiochip->direction_input = msc313_gpio_direction_input;  in msc313_gpio_probe()
656 	gpiochip->direction_output = msc313_gpio_direction_output;  in msc313_gpio_probe()
657 	gpiochip->get = msc313_gpio_get;  in msc313_gpio_probe()
658 	gpiochip->set = msc313_gpio_set;  in msc313_gpio_probe()
659 	gpiochip->base = -1;  in msc313_gpio_probe()
660 	gpiochip->ngpio = gpio->gpio_data->num;  in msc313_gpio_probe()
661 	gpiochip->names = gpio->gpio_data->names;  in msc313_gpio_probe()
663 	gpioirqchip = &gpiochip->irq;  in msc313_gpio_probe()
665 	gpioirqchip->fwnode = of_node_to_fwnode(dev->of_node);  in msc313_gpio_probe()
666 	gpioirqchip->parent_domain = parent_domain;  in msc313_gpio_probe()
667 	gpioirqchip->child_to_parent_hwirq = msc313e_gpio_child_to_parent_hwirq;  in msc313_gpio_probe()
668 	gpioirqchip->populate_parent_alloc_arg = msc313_gpio_populate_parent_fwspec;  in msc313_gpio_probe()
669 	gpioirqchip->handler = handle_bad_irq;  in msc313_gpio_probe()
670 	gpioirqchip->default_type = IRQ_TYPE_NONE;  in msc313_gpio_probe()
672 	return devm_gpiochip_add_data(dev, gpiochip, gpio);  in msc313_gpio_probe()
678 		.compatible = "mstar,msc313-gpio",
682 		.compatible = "sstar,ssd20xd-gpio",
690  * The GPIO controller loses the state of the registers when the
696 	struct msc313_gpio *gpio = dev_get_drvdata(dev);  in msc313_gpio_suspend()  local
699 	for (i = 0; i < gpio->gpio_data->num; i++)  in msc313_gpio_suspend()
700 		gpio->saved[i] = readb_relaxed(gpio->base + gpio->gpio_data->offsets[i]) & MSC313_GPIO_BITSTOSAVE;  in msc313_gpio_suspend()
707 	struct msc313_gpio *gpio = dev_get_drvdata(dev);  in msc313_gpio_resume()  local
710 	for (i = 0; i < gpio->gpio_data->num; i++)  in msc313_gpio_resume()
711 		writeb_relaxed(gpio->saved[i], gpio->base + gpio->gpio_data->offsets[i]);  in msc313_gpio_resume()