3  * GPIO driver
6  * Copyright 2012, Hauke Mehrtens <hauke@hauke-m.de>
11 #include <linux/gpio/driver.h>
22 static int bcma_gpio_get_value(struct gpio_chip *chip, unsigned gpio)  in bcma_gpio_get_value()  argument
26 	return !!bcma_chipco_gpio_in(cc, 1 << gpio);  in bcma_gpio_get_value()
29 static void bcma_gpio_set_value(struct gpio_chip *chip, unsigned gpio,  in bcma_gpio_set_value()  argument
34 	bcma_chipco_gpio_out(cc, 1 << gpio, value ? 1 << gpio : 0);  in bcma_gpio_set_value()
37 static int bcma_gpio_direction_input(struct gpio_chip *chip, unsigned gpio)  in bcma_gpio_direction_input()  argument
41 	bcma_chipco_gpio_outen(cc, 1 << gpio, 0);  in bcma_gpio_direction_input()
45 static int bcma_gpio_direction_output(struct gpio_chip *chip, unsigned gpio,  in bcma_gpio_direction_output()  argument
50 	bcma_chipco_gpio_outen(cc, 1 << gpio, 1 << gpio);  in bcma_gpio_direction_output()
51 	bcma_chipco_gpio_out(cc, 1 << gpio, value ? 1 << gpio : 0);  in bcma_gpio_direction_output()
55 static int bcma_gpio_request(struct gpio_chip *chip, unsigned gpio)  in bcma_gpio_request()  argument
59 	bcma_chipco_gpio_control(cc, 1 << gpio, 0);  in bcma_gpio_request()
61 	bcma_chipco_gpio_pulldown(cc, 1 << gpio, 0);  in bcma_gpio_request()
63 	bcma_chipco_gpio_pullup(cc, 1 << gpio, 1 << gpio);  in bcma_gpio_request()
68 static void bcma_gpio_free(struct gpio_chip *chip, unsigned gpio)  in bcma_gpio_free()  argument
73 	bcma_chipco_gpio_pullup(cc, 1 << gpio, 0);  in bcma_gpio_free()
82 	int gpio = irqd_to_hwirq(d);  in bcma_gpio_irq_unmask()  local
83 	u32 val = bcma_chipco_gpio_in(cc, BIT(gpio));  in bcma_gpio_irq_unmask()
85 	gpiochip_enable_irq(gc, gpio);  in bcma_gpio_irq_unmask()
86 	bcma_chipco_gpio_polarity(cc, BIT(gpio), val);  in bcma_gpio_irq_unmask()
87 	bcma_chipco_gpio_intmask(cc, BIT(gpio), BIT(gpio));  in bcma_gpio_irq_unmask()
94 	int gpio = irqd_to_hwirq(d);  in bcma_gpio_irq_mask()  local
96 	bcma_chipco_gpio_intmask(cc, BIT(gpio), 0);  in bcma_gpio_irq_mask()
97 	gpiochip_disable_irq(gc, gpio);  in bcma_gpio_irq_mask()
101 	.name		= "BCMA-GPIO",
111 	struct gpio_chip *gc = &cc->gpio;  in bcma_gpio_irq_handler()
114 	u32 pol = bcma_cc_read32(cc, BCMA_CC_GPIOPOL);  in bcma_gpio_irq_handler()  local
115 	unsigned long irqs = (val ^ pol) & mask;  in bcma_gpio_irq_handler()
116 	int gpio;  in bcma_gpio_irq_handler()  local
121 	for_each_set_bit(gpio, &irqs, gc->ngpio)  in bcma_gpio_irq_handler()
122 		generic_handle_domain_irq_safe(gc->irq.domain, gpio);  in bcma_gpio_irq_handler()
130 	struct gpio_chip *chip = &cc->gpio;  in bcma_gpio_irq_init()
131 	struct gpio_irq_chip *girq = &chip->irq;  in bcma_gpio_irq_init()
134 	if (cc->core->bus->hosttype != BCMA_HOSTTYPE_SOC)  in bcma_gpio_irq_init()
137 	hwirq = bcma_core_irq(cc->core, 0);  in bcma_gpio_irq_init()
138 	err = request_irq(hwirq, bcma_gpio_irq_handler, IRQF_SHARED, "gpio",  in bcma_gpio_irq_init()
148 	girq->parent_handler = NULL;  in bcma_gpio_irq_init()
149 	girq->num_parents = 0;  in bcma_gpio_irq_init()
150 	girq->parents = NULL;  in bcma_gpio_irq_init()
151 	girq->default_type = IRQ_TYPE_NONE;  in bcma_gpio_irq_init()
152 	girq->handler = handle_simple_irq;  in bcma_gpio_irq_init()
159 	if (cc->core->bus->hosttype != BCMA_HOSTTYPE_SOC)  in bcma_gpio_irq_exit()
163 	free_irq(bcma_core_irq(cc->core, 0), cc);  in bcma_gpio_irq_exit()
178 	struct bcma_bus *bus = cc->core->bus;  in bcma_gpio_init()
179 	struct gpio_chip *chip = &cc->gpio;  in bcma_gpio_init()
182 	chip->label		= "bcma_gpio";  in bcma_gpio_init()
183 	chip->owner		= THIS_MODULE;  in bcma_gpio_init()
184 	chip->request		= bcma_gpio_request;  in bcma_gpio_init()
185 	chip->free		= bcma_gpio_free;  in bcma_gpio_init()
186 	chip->get		= bcma_gpio_get_value;  in bcma_gpio_init()
187 	chip->set		= bcma_gpio_set_value;  in bcma_gpio_init()
188 	chip->direction_input	= bcma_gpio_direction_input;  in bcma_gpio_init()
189 	chip->direction_output	= bcma_gpio_direction_output;  in bcma_gpio_init()
190 	chip->parent		= bus->dev;  in bcma_gpio_init()
191 	chip->fwnode		= dev_fwnode(&cc->core->dev);  in bcma_gpio_init()
193 	switch (bus->chipinfo.id) {  in bcma_gpio_init()
199 		chip->ngpio	= 32;  in bcma_gpio_init()
202 		chip->ngpio	= 16;  in bcma_gpio_init()
206 	 * Register SoC GPIO devices with absolute GPIO pin base.  in bcma_gpio_init()
208 	 * GPIO numbers.  in bcma_gpio_init()
209 	 * On some ARM devices, user space may want to access some system GPIO  in bcma_gpio_init()
210 	 * pins directly, which is easier to do with a predictable GPIO base.  in bcma_gpio_init()
213 	    cc->core->bus->hosttype == BCMA_HOSTTYPE_SOC)  in bcma_gpio_init()
214 		chip->base		= bus->num * BCMA_GPIO_MAX_PINS;  in bcma_gpio_init()
216 		chip->base		= -1;  in bcma_gpio_init()
234 	gpiochip_remove(&cc->gpio);  in bcma_gpio_unregister()