1 // SPDX-License-Identifier: GPL-2.0
15 #include <dt-bindings/gpio/msc313-gpio.h>
16 #include <dt-bindings/interrupt-controller/arm-gic.h>
18 #define DRIVER_NAME "gpio-msc313"
227 	void __iomem *base;  member
235 	u8 gpioreg = readb_relaxed(gpio->base + gpio->gpio_data->offsets[offset]);  in msc313_gpio_set()
242 	writeb_relaxed(gpioreg, gpio->base + gpio->gpio_data->offsets[offset]);  in msc313_gpio_set()
249 	return readb_relaxed(gpio->base + gpio->gpio_data->offsets[offset]) & MSC313_GPIO_IN;  in msc313_gpio_get()
255 	u8 gpioreg = readb_relaxed(gpio->base + gpio->gpio_data->offsets[offset]);  in msc313_gpio_direction_input()
258 	writeb_relaxed(gpioreg, gpio->base + gpio->gpio_data->offsets[offset]);  in msc313_gpio_direction_input()
266 	u8 gpioreg = readb_relaxed(gpio->base + gpio->gpio_data->offsets[offset]);  in msc313_gpio_direction_output()
273 	writeb_relaxed(gpioreg, gpio->base + gpio->gpio_data->offsets[offset]);  in msc313_gpio_direction_output()
279  * The interrupt handling happens in the parent interrupt controller,
292  * The parent interrupt controller needs the GIC interrupt type set to GIC_SPI
306 	fwspec->fwnode = gc->irq.parent_domain->fwnode;  in msc313_gpio_populate_parent_fwspec()
307 	fwspec->param_count = 3;  in msc313_gpio_populate_parent_fwspec()
308 	fwspec->param[0] = GIC_SPI;  in msc313_gpio_populate_parent_fwspec()
309 	fwspec->param[1] = parent_hwirq;  in msc313_gpio_populate_parent_fwspec()
310 	fwspec->param[2] = parent_type;  in msc313_gpio_populate_parent_fwspec()
318 					     unsigned int *parent,  in msc313e_gpio_child_to_parent_hwirq()  argument
322 	unsigned int offset = priv->gpio_data->offsets[child];  in msc313e_gpio_child_to_parent_hwirq()
325 	 * only the spi0 pins have interrupts on the parent  in msc313e_gpio_child_to_parent_hwirq()
331 		*parent = ((offset - OFF_SPI0_CZ) >> 2) + 28;  in msc313e_gpio_child_to_parent_hwirq()
335 	return -EINVAL;  in msc313e_gpio_child_to_parent_hwirq()
346 	struct device *dev = &pdev->dev;  in msc313_gpio_probe()
351 		return -EINVAL;  in msc313_gpio_probe()
353 	parent_node = of_irq_find_parent(dev->of_node);  in msc313_gpio_probe()
355 		return -ENODEV;  in msc313_gpio_probe()
359 		return -ENODEV;  in msc313_gpio_probe()
363 		return -ENOMEM;  in msc313_gpio_probe()
365 	gpio->gpio_data = match_data;  in msc313_gpio_probe()
367 	gpio->saved = devm_kcalloc(dev, gpio->gpio_data->num, sizeof(*gpio->saved), GFP_KERNEL);  in msc313_gpio_probe()
368 	if (!gpio->saved)  in msc313_gpio_probe()
369 		return -ENOMEM;  in msc313_gpio_probe()
371 	gpio->base = devm_platform_ioremap_resource(pdev, 0);  in msc313_gpio_probe()
372 	if (IS_ERR(gpio->base))  in msc313_gpio_probe()
373 		return PTR_ERR(gpio->base);  in msc313_gpio_probe()
379 		return -ENOMEM;  in msc313_gpio_probe()
381 	gpiochip->label = DRIVER_NAME;  in msc313_gpio_probe()
382 	gpiochip->parent = dev;  in msc313_gpio_probe()
383 	gpiochip->request = gpiochip_generic_request;  in msc313_gpio_probe()
384 	gpiochip->free = gpiochip_generic_free;  in msc313_gpio_probe()
385 	gpiochip->direction_input = msc313_gpio_direction_input;  in msc313_gpio_probe()
386 	gpiochip->direction_output = msc313_gpio_direction_output;  in msc313_gpio_probe()
387 	gpiochip->get = msc313_gpio_get;  in msc313_gpio_probe()
388 	gpiochip->set = msc313_gpio_set;  in msc313_gpio_probe()
389 	gpiochip->base = -1;  in msc313_gpio_probe()
390 	gpiochip->ngpio = gpio->gpio_data->num;  in msc313_gpio_probe()
391 	gpiochip->names = gpio->gpio_data->names;  in msc313_gpio_probe()
393 	gpioirqchip = &gpiochip->irq;  in msc313_gpio_probe()
394 	gpioirqchip->chip = &msc313_gpio_irqchip;  in msc313_gpio_probe()
395 	gpioirqchip->fwnode = of_node_to_fwnode(dev->of_node);  in msc313_gpio_probe()
396 	gpioirqchip->parent_domain = parent_domain;  in msc313_gpio_probe()
397 	gpioirqchip->child_to_parent_hwirq = msc313e_gpio_child_to_parent_hwirq;  in msc313_gpio_probe()
398 	gpioirqchip->populate_parent_alloc_arg = msc313_gpio_populate_parent_fwspec;  in msc313_gpio_probe()
399 	gpioirqchip->handler = handle_bad_irq;  in msc313_gpio_probe()
400 	gpioirqchip->default_type = IRQ_TYPE_NONE;  in msc313_gpio_probe()
414 		.compatible = "mstar,msc313-gpio",
431 	for (i = 0; i < gpio->gpio_data->num; i++)  in msc313_gpio_suspend()
432 		gpio->saved[i] = readb_relaxed(gpio->base + gpio->gpio_data->offsets[i]) & MSC313_GPIO_BITSTOSAVE;  in msc313_gpio_suspend()
442 	for (i = 0; i < gpio->gpio_data->num; i++)  in msc313_gpio_resume()
443 		writeb_relaxed(gpio->saved[i], gpio->base + gpio->gpio_data->offsets[i]);  in msc313_gpio_resume()