1 // SPDX-License-Identifier: GPL-2.0
14 #include <linux/mfd/syscon.h>
26  * wakeup signal generation
53  * sama5d2_piobu_setup_pin() - prepares a pin for set_direction call
56  * Do not consider pin as tamper wakeup interrupt source
65 	ret = regmap_update_bits(piobu->regmap, PIOBU_BMPR, mask, 0);  in sama5d2_piobu_setup_pin()
69 	ret = regmap_update_bits(piobu->regmap, PIOBU_NMPR, mask, 0);  in sama5d2_piobu_setup_pin()
73 	return regmap_update_bits(piobu->regmap, PIOBU_WKPR, mask, 0);  in sama5d2_piobu_setup_pin()
77  * sama5d2_piobu_write_value() - writes value & mask at the pin's PIOBU register
88 	return regmap_update_bits(piobu->regmap, reg, mask, value);  in sama5d2_piobu_write_value()
92  * sama5d2_piobu_read_value() - read the value with masking from the pin's PIOBU
104 	ret = regmap_read(piobu->regmap, reg, &val);  in sama5d2_piobu_read_value()
112  * sama5d2_piobu_get_direction() - gpiochip get_direction
127  * sama5d2_piobu_direction_input() - gpiochip direction_input
136  * sama5d2_piobu_direction_output() - gpiochip direction_output
151  * sama5d2_piobu_get() - gpiochip get
170  * sama5d2_piobu_set() - gpiochip set
188 	piobu = devm_kzalloc(&pdev->dev, sizeof(*piobu), GFP_KERNEL);  in sama5d2_piobu_probe()
190 		return -ENOMEM;  in sama5d2_piobu_probe()
192 	piobu->chip.label = pdev->name;  in sama5d2_piobu_probe()
193 	piobu->chip.parent = &pdev->dev;  in sama5d2_piobu_probe()
194 	piobu->chip.owner = THIS_MODULE;  in sama5d2_piobu_probe()
195 	piobu->chip.get_direction = sama5d2_piobu_get_direction;  in sama5d2_piobu_probe()
196 	piobu->chip.direction_input = sama5d2_piobu_direction_input;  in sama5d2_piobu_probe()
197 	piobu->chip.direction_output = sama5d2_piobu_direction_output;  in sama5d2_piobu_probe()
198 	piobu->chip.get = sama5d2_piobu_get;  in sama5d2_piobu_probe()
199 	piobu->chip.set = sama5d2_piobu_set;  in sama5d2_piobu_probe()
200 	piobu->chip.base = -1;  in sama5d2_piobu_probe()
201 	piobu->chip.ngpio = PIOBU_NUM;  in sama5d2_piobu_probe()
202 	piobu->chip.can_sleep = 0;  in sama5d2_piobu_probe()
204 	piobu->regmap = syscon_node_to_regmap(pdev->dev.of_node);  in sama5d2_piobu_probe()
205 	if (IS_ERR(piobu->regmap)) {  in sama5d2_piobu_probe()
206 		dev_err(&pdev->dev, "Failed to get syscon regmap %ld\n",  in sama5d2_piobu_probe()
207 			PTR_ERR(piobu->regmap));  in sama5d2_piobu_probe()
208 		return PTR_ERR(piobu->regmap);  in sama5d2_piobu_probe()
211 	ret = devm_gpiochip_add_data(&pdev->dev, &piobu->chip, piobu);  in sama5d2_piobu_probe()
213 		dev_err(&pdev->dev, "Failed to add gpiochip %d\n", ret);  in sama5d2_piobu_probe()
218 		ret = sama5d2_piobu_setup_pin(&piobu->chip, i);  in sama5d2_piobu_probe()
220 			dev_err(&pdev->dev, "Failed to setup pin: %d %d\n",  in sama5d2_piobu_probe()
230 	{ .compatible = "atmel,sama5d2-secumod" },
237 		.name		= "sama5d2-piobu",