1 // SPDX-License-Identifier: GPL-2.0+
23  *	GPO 0...12	General Purpose Output
24  *	GPIO 0...14	General Purpose I/O (Open-Drain)
76  * 14..26	GPO 0..12
91 	/* Real GPO bits cannot be put in output direction */  in vx855gpio_direction_input()
93 		return -EINVAL;  in vx855gpio_direction_input()
96 	spin_lock_irqsave(&vg->lock, flags);  in vx855gpio_direction_input()
97 	reg_out = inl(vg->io_gpo);  in vx855gpio_direction_input()
98 	reg_out |= gpio_o_bit(nr - NR_VX855_GPInO);  in vx855gpio_direction_input()
99 	outl(reg_out, vg->io_gpo);  in vx855gpio_direction_input()
100 	spin_unlock_irqrestore(&vg->lock, flags);  in vx855gpio_direction_input()
112 		reg_in = inl(vg->io_gpi);  in vx855gpio_get()
116 		/* GPO don't have an input bit, we need to read it  in vx855gpio_get()
118 		reg_in = inl(vg->io_gpo);  in vx855gpio_get()
119 		if (reg_in & gpo_o_bit(nr - NR_VX855_GPI))  in vx855gpio_get()
122 		reg_in = inl(vg->io_gpi);  in vx855gpio_get()
123 		if (reg_in & gpio_i_bit(nr - NR_VX855_GPInO))  in vx855gpio_get()
141 	spin_lock_irqsave(&vg->lock, flags);  in vx855gpio_set()
142 	reg_out = inl(vg->io_gpo);  in vx855gpio_set()
145 			reg_out |= gpo_o_bit(nr - NR_VX855_GPI);  in vx855gpio_set()
147 			reg_out &= ~gpo_o_bit(nr - NR_VX855_GPI);  in vx855gpio_set()
150 			reg_out |= gpio_o_bit(nr - NR_VX855_GPInO);  in vx855gpio_set()
152 			reg_out &= ~gpio_o_bit(nr - NR_VX855_GPInO);  in vx855gpio_set()
154 	outl(reg_out, vg->io_gpo);  in vx855gpio_set()
155 	spin_unlock_irqrestore(&vg->lock, flags);  in vx855gpio_set()
163 		return -EINVAL;  in vx855gpio_direction_output()
165 	/* True GPO don't need to be switched to output mode,  in vx855gpio_direction_output()
166 	 * and GPIO are open-drain, i.e. also need no switching,  in vx855gpio_direction_output()
174 				unsigned long config)  in vx855gpio_set_config()  argument
176 	enum pin_config_param param = pinconf_to_config_param(config);  in vx855gpio_set_config()
178 	/* The GPI cannot be single-ended */  in vx855gpio_set_config()
180 		return -EINVAL;  in vx855gpio_set_config()
182 	/* The GPO's are push-pull */  in vx855gpio_set_config()
185 			return -ENOTSUPP;  in vx855gpio_set_config()
191 		return -ENOTSUPP;  in vx855gpio_set_config()
211 	struct gpio_chip *c = &vg->gpio;  in vx855gpio_gpio_setup()
213 	c->label = "VX855 South Bridge";  in vx855gpio_gpio_setup()
214 	c->owner = THIS_MODULE;  in vx855gpio_gpio_setup()
215 	c->direction_input = vx855gpio_direction_input;  in vx855gpio_gpio_setup()
216 	c->direction_output = vx855gpio_direction_output;  in vx855gpio_gpio_setup()
217 	c->get = vx855gpio_get;  in vx855gpio_gpio_setup()
218 	c->set = vx855gpio_set;  in vx855gpio_gpio_setup()
219 	c->set_config = vx855gpio_set_config;  in vx855gpio_gpio_setup()
220 	c->dbg_show = NULL;  in vx855gpio_gpio_setup()
221 	c->base = 0;  in vx855gpio_gpio_setup()
222 	c->ngpio = NR_VX855_GP;  in vx855gpio_gpio_setup()
223 	c->can_sleep = false;  in vx855gpio_gpio_setup()
224 	c->names = vx855gpio_names;  in vx855gpio_gpio_setup()
237 		return -EBUSY;  in vx855gpio_probe()
239 	vg = devm_kzalloc(&pdev->dev, sizeof(*vg), GFP_KERNEL);  in vx855gpio_probe()
241 		return -ENOMEM;  in vx855gpio_probe()
245 	dev_info(&pdev->dev, "found VX855 GPIO controller\n");  in vx855gpio_probe()
246 	vg->io_gpi = res_gpi->start;  in vx855gpio_probe()
247 	vg->io_gpo = res_gpo->start;  in vx855gpio_probe()
248 	spin_lock_init(&vg->lock);  in vx855gpio_probe()
252 	 * and in the case of the OLPC XO-1.5, some of those ports are used  in vx855gpio_probe()
258 	if (!devm_request_region(&pdev->dev, res_gpi->start,  in vx855gpio_probe()
260 		dev_warn(&pdev->dev,  in vx855gpio_probe()
263 	if (!devm_request_region(&pdev->dev, res_gpo->start,  in vx855gpio_probe()
265 		dev_warn(&pdev->dev,  in vx855gpio_probe()
266 			"GPO I/O resource busy, probably claimed by ACPI\n");  in vx855gpio_probe()
270 	return devm_gpiochip_add_data(&pdev->dev, &vg->gpio, vg);  in vx855gpio_probe()