22  * MA 02111-1307 USA
39  *	GPO 0...12	General Purpose Output
40  *	GPIO 0...14	General Purpose I/O (Open-Drain)
92  * 14..26	GPO 0..12
107 	/* Real GPO bits cannot be put in output direction */  in vx855gpio_direction_input()
109 		return -EINVAL;  in vx855gpio_direction_input()
112 	spin_lock_irqsave(&vg->lock, flags);  in vx855gpio_direction_input()
113 	reg_out = inl(vg->io_gpo);  in vx855gpio_direction_input()
114 	reg_out |= gpio_o_bit(nr - NR_VX855_GPInO);  in vx855gpio_direction_input()
115 	outl(reg_out, vg->io_gpo);  in vx855gpio_direction_input()
116 	spin_unlock_irqrestore(&vg->lock, flags);  in vx855gpio_direction_input()
128 		reg_in = inl(vg->io_gpi);  in vx855gpio_get()
132 		/* GPO don't have an input bit, we need to read it  in vx855gpio_get()
134 		reg_in = inl(vg->io_gpo);  in vx855gpio_get()
135 		if (reg_in & gpo_o_bit(nr - NR_VX855_GPI))  in vx855gpio_get()
138 		reg_in = inl(vg->io_gpi);  in vx855gpio_get()
139 		if (reg_in & gpio_i_bit(nr - NR_VX855_GPInO))  in vx855gpio_get()
157 	spin_lock_irqsave(&vg->lock, flags);  in vx855gpio_set()
158 	reg_out = inl(vg->io_gpo);  in vx855gpio_set()
161 			reg_out |= gpo_o_bit(nr - NR_VX855_GPI);  in vx855gpio_set()
163 			reg_out &= ~gpo_o_bit(nr - NR_VX855_GPI);  in vx855gpio_set()
166 			reg_out |= gpio_o_bit(nr - NR_VX855_GPInO);  in vx855gpio_set()
168 			reg_out &= ~gpio_o_bit(nr - NR_VX855_GPInO);  in vx855gpio_set()
170 	outl(reg_out, vg->io_gpo);  in vx855gpio_set()
171 	spin_unlock_irqrestore(&vg->lock, flags);  in vx855gpio_set()
179 		return -EINVAL;  in vx855gpio_direction_output()
181 	/* True GPO don't need to be switched to output mode,  in vx855gpio_direction_output()
182 	 * and GPIO are open-drain, i.e. also need no switching,  in vx855gpio_direction_output()
190 				unsigned long config)  in vx855gpio_set_config()  argument
192 	enum pin_config_param param = pinconf_to_config_param(config);  in vx855gpio_set_config()
194 	/* The GPI cannot be single-ended */  in vx855gpio_set_config()
196 		return -EINVAL;  in vx855gpio_set_config()
198 	/* The GPO's are push-pull */  in vx855gpio_set_config()
201 			return -ENOTSUPP;  in vx855gpio_set_config()
207 		return -ENOTSUPP;  in vx855gpio_set_config()
227 	struct gpio_chip *c = &vg->gpio;  in vx855gpio_gpio_setup()
229 	c->label = "VX855 South Bridge";  in vx855gpio_gpio_setup()
230 	c->owner = THIS_MODULE;  in vx855gpio_gpio_setup()
231 	c->direction_input = vx855gpio_direction_input;  in vx855gpio_gpio_setup()
232 	c->direction_output = vx855gpio_direction_output;  in vx855gpio_gpio_setup()
233 	c->get = vx855gpio_get;  in vx855gpio_gpio_setup()
234 	c->set = vx855gpio_set;  in vx855gpio_gpio_setup()
235 	c->set_config = vx855gpio_set_config,  in vx855gpio_gpio_setup()
236 	c->dbg_show = NULL;  in vx855gpio_gpio_setup()
237 	c->base = 0;  in vx855gpio_gpio_setup()
238 	c->ngpio = NR_VX855_GP;  in vx855gpio_gpio_setup()
239 	c->can_sleep = false;  in vx855gpio_gpio_setup()
240 	c->names = vx855gpio_names;  in vx855gpio_gpio_setup()
253 		return -EBUSY;  in vx855gpio_probe()
255 	vg = devm_kzalloc(&pdev->dev, sizeof(*vg), GFP_KERNEL);  in vx855gpio_probe()
257 		return -ENOMEM;  in vx855gpio_probe()
261 	dev_info(&pdev->dev, "found VX855 GPIO controller\n");  in vx855gpio_probe()
262 	vg->io_gpi = res_gpi->start;  in vx855gpio_probe()
263 	vg->io_gpo = res_gpo->start;  in vx855gpio_probe()
264 	spin_lock_init(&vg->lock);  in vx855gpio_probe()
268 	 * and in the case of the OLPC XO-1.5, some of those ports are used  in vx855gpio_probe()
274 	if (!devm_request_region(&pdev->dev, res_gpi->start,  in vx855gpio_probe()
276 		dev_warn(&pdev->dev,  in vx855gpio_probe()
279 	if (!devm_request_region(&pdev->dev, res_gpo->start,  in vx855gpio_probe()
281 		dev_warn(&pdev->dev,  in vx855gpio_probe()
282 			"GPO I/O resource busy, probably claimed by ACPI\n");  in vx855gpio_probe()
286 	return devm_gpiochip_add_data(&pdev->dev, &vg->gpio, vg);  in vx855gpio_probe()