1 // SPDX-License-Identifier: GPL-2.0-only
11 #include <linux/via-core.h>
12 #include <linux/via-gpio.h>
16  * The ports we know about.  Note that the port-25 gpios are not
29 		.vg_name = "VGPIO0",  /* Guess - not in datasheet */
69  * This structure controls the active GPIOs, which may be a subset
83 static void via_gpio_set(struct gpio_chip *chip, unsigned int nr,  in via_gpio_set()  argument
91 	spin_lock_irqsave(&cfg->vdev->reg_lock, flags);  in via_gpio_set()
92 	gpio = cfg->active_gpios[nr];  in via_gpio_set()
93 	reg = via_read_reg(VIASR, gpio->vg_port_index);  in via_gpio_set()
94 	reg |= 0x40 << gpio->vg_mask_shift;  /* output enable */  in via_gpio_set()
96 		reg |= 0x10 << gpio->vg_mask_shift;  in via_gpio_set()
98 		reg &= ~(0x10 << gpio->vg_mask_shift);  in via_gpio_set()
99 	via_write_reg(VIASR, gpio->vg_port_index, reg);  in via_gpio_set()
100 	spin_unlock_irqrestore(&cfg->vdev->reg_lock, flags);  in via_gpio_set()
103 static int via_gpio_dir_out(struct gpio_chip *chip, unsigned int nr,  in via_gpio_dir_out()  argument
106 	via_gpio_set(chip, nr, value);  in via_gpio_dir_out()
114 static int via_gpio_dir_input(struct gpio_chip *chip, unsigned int nr)  in via_gpio_dir_input()  argument
120 	spin_lock_irqsave(&cfg->vdev->reg_lock, flags);  in via_gpio_dir_input()
121 	gpio = cfg->active_gpios[nr];  in via_gpio_dir_input()
122 	via_write_reg_mask(VIASR, gpio->vg_port_index, 0,  in via_gpio_dir_input()
123 			0x40 << gpio->vg_mask_shift);  in via_gpio_dir_input()
124 	spin_unlock_irqrestore(&cfg->vdev->reg_lock, flags);  in via_gpio_dir_input()
128 static int via_gpio_get(struct gpio_chip *chip, unsigned int nr)  in via_gpio_get()  argument
135 	spin_lock_irqsave(&cfg->vdev->reg_lock, flags);  in via_gpio_get()
136 	gpio = cfg->active_gpios[nr];  in via_gpio_get()
137 	reg = via_read_reg(VIASR, gpio->vg_port_index);  in via_gpio_get()
138 	spin_unlock_irqrestore(&cfg->vdev->reg_lock, flags);  in via_gpio_get()
139 	return !!(reg & (0x04 << gpio->vg_mask_shift));  in via_gpio_get()
151 		.base = -1,
162 	via_write_reg_mask(VIASR, gpio->vg_port_index, 0x02, 0x02);  in viafb_gpio_enable()
167 	via_write_reg_mask(VIASR, gpio->vg_port_index, 0, 0x02);  in viafb_gpio_disable()
200 		if (!strcmp(name, viafb_gpio_config.active_gpios[i]->vg_name))  in viafb_gpio_lookup()
202 	return -1;  in viafb_gpio_lookup()
211 	struct viafb_dev *vdev = platdev->dev.platform_data;  in viafb_gpio_probe()
212 	struct via_port_cfg *port_cfg = vdev->port_cfg;  in viafb_gpio_probe()
218 	 * Set up entries for all GPIOs which have been configured to  in viafb_gpio_probe()
226 			if (gpio->vg_port_index == port_cfg[i].ioport_index) {  in viafb_gpio_probe()
229 					gpio->vg_name;  in viafb_gpio_probe()
237 		printk(KERN_INFO "viafb: no GPIOs configured\n");  in viafb_gpio_probe()
244 	spin_lock_irqsave(&viafb_gpio_config.vdev->reg_lock, flags);  in viafb_gpio_probe()
247 	spin_unlock_irqrestore(&viafb_gpio_config.vdev->reg_lock, flags);  in viafb_gpio_probe()
251 	viafb_gpio_config.gpio_chip.base = -1;  /* Dynamic */  in viafb_gpio_probe()
255 		printk(KERN_ERR "viafb: failed to add gpios (%d)\n", ret);  in viafb_gpio_probe()
283 	spin_lock_irqsave(&viafb_gpio_config.vdev->reg_lock, flags);  in viafb_gpio_remove()
287 	spin_unlock_irqrestore(&viafb_gpio_config.vdev->reg_lock, flags);  in viafb_gpio_remove()
293 		.name = "viafb-gpio",