1 // SPDX-License-Identifier: GPL-2.0-or-later
20 /* SYSCON driver is designed to use 32-bit wide registers */
25  * struct syscon_gpio_data - Configuration for the device.
43 	int		(*set)(struct gpio_chip *chip, unsigned int offset,
48 	struct gpio_chip		chip;  member
55 static int syscon_gpio_get(struct gpio_chip *chip, unsigned offset)  in syscon_gpio_get()  argument
57 	struct syscon_gpio_priv *priv = gpiochip_get_data(chip);  in syscon_gpio_get()
61 	offs = priv->dreg_offset + priv->data->dat_bit_offset + offset;  in syscon_gpio_get()
63 	ret = regmap_read(priv->syscon,  in syscon_gpio_get()
71 static int syscon_gpio_set(struct gpio_chip *chip, unsigned int offset, int val)  in syscon_gpio_set()  argument
73 	struct syscon_gpio_priv *priv = gpiochip_get_data(chip);  in syscon_gpio_set()
76 	offs = priv->dreg_offset + priv->data->dat_bit_offset + offset;  in syscon_gpio_set()
78 	return regmap_update_bits(priv->syscon,  in syscon_gpio_set()
84 static int syscon_gpio_dir_in(struct gpio_chip *chip, unsigned offset)  in syscon_gpio_dir_in()  argument
86 	struct syscon_gpio_priv *priv = gpiochip_get_data(chip);  in syscon_gpio_dir_in()
88 	if (priv->data->flags & GPIO_SYSCON_FEAT_DIR) {  in syscon_gpio_dir_in()
91 		offs = priv->dir_reg_offset +  in syscon_gpio_dir_in()
92 		       priv->data->dir_bit_offset + offset;  in syscon_gpio_dir_in()
94 		regmap_update_bits(priv->syscon,  in syscon_gpio_dir_in()
102 static int syscon_gpio_dir_out(struct gpio_chip *chip, unsigned offset, int val)  in syscon_gpio_dir_out()  argument
104 	struct syscon_gpio_priv *priv = gpiochip_get_data(chip);  in syscon_gpio_dir_out()
106 	if (priv->data->flags & GPIO_SYSCON_FEAT_DIR) {  in syscon_gpio_dir_out()
109 		offs = priv->dir_reg_offset +  in syscon_gpio_dir_out()
110 		       priv->data->dir_bit_offset + offset;  in syscon_gpio_dir_out()
112 		regmap_update_bits(priv->syscon,  in syscon_gpio_dir_out()
118 	return chip->set(chip, offset, val);  in syscon_gpio_dir_out()
122 	/* ARM CLPS711X SYSFLG1 Bits 8-10 */
128 static int rockchip_gpio_set(struct gpio_chip *chip, unsigned int offset,  in rockchip_gpio_set()  argument
131 	struct syscon_gpio_priv *priv = gpiochip_get_data(chip);  in rockchip_gpio_set()
137 	offs = priv->dreg_offset + priv->data->dat_bit_offset + offset;  in rockchip_gpio_set()
140 	ret = regmap_write(priv->syscon,  in rockchip_gpio_set()
144 		dev_err(chip->parent, "gpio write failed ret(%d)\n", ret);  in rockchip_gpio_set()
159 static int keystone_gpio_set(struct gpio_chip *chip, unsigned int offset,  in keystone_gpio_set()  argument
162 	struct syscon_gpio_priv *priv = gpiochip_get_data(chip);  in keystone_gpio_set()
166 	offs = priv->dreg_offset + priv->data->dat_bit_offset + offset;  in keystone_gpio_set()
172 			priv->syscon,  in keystone_gpio_set()
177 		dev_err(chip->parent, "gpio write failed ret(%d)\n", ret);  in keystone_gpio_set()
192 		.compatible	= "cirrus,ep7209-mctrl-gpio",
196 		.compatible	= "ti,keystone-dsp-gpio",
200 		.compatible	= "rockchip,rk3328-grf-gpio",
209 	struct device *dev = &pdev->dev;  in syscon_gpio_probe()
211 	struct device_node *np = dev->of_node;  in syscon_gpio_probe()
217 		return -ENOMEM;  in syscon_gpio_probe()
219 	priv->data = of_device_get_match_data(dev);  in syscon_gpio_probe()
221 	priv->syscon = syscon_regmap_lookup_by_phandle(np, "gpio,syscon-dev");  in syscon_gpio_probe()
222 	if (IS_ERR(priv->syscon) && np->parent) {  in syscon_gpio_probe()
223 		priv->syscon = syscon_node_to_regmap(np->parent);  in syscon_gpio_probe()
226 	if (IS_ERR(priv->syscon))  in syscon_gpio_probe()
227 		return PTR_ERR(priv->syscon);  in syscon_gpio_probe()
230 		ret = of_property_read_u32_index(np, "gpio,syscon-dev", 1,  in syscon_gpio_probe()
231 						 &priv->dreg_offset);  in syscon_gpio_probe()
235 		priv->dreg_offset <<= 3;  in syscon_gpio_probe()
237 		ret = of_property_read_u32_index(np, "gpio,syscon-dev", 2,  in syscon_gpio_probe()
238 						 &priv->dir_reg_offset);  in syscon_gpio_probe()
242 		priv->dir_reg_offset <<= 3;  in syscon_gpio_probe()
245 	priv->chip.parent = dev;  in syscon_gpio_probe()
246 	priv->chip.owner = THIS_MODULE;  in syscon_gpio_probe()
247 	priv->chip.label = dev_name(dev);  in syscon_gpio_probe()
248 	priv->chip.base = -1;  in syscon_gpio_probe()
249 	priv->chip.ngpio = priv->data->bit_count;  in syscon_gpio_probe()
250 	priv->chip.get = syscon_gpio_get;  in syscon_gpio_probe()
251 	if (priv->data->flags & GPIO_SYSCON_FEAT_IN)  in syscon_gpio_probe()
252 		priv->chip.direction_input = syscon_gpio_dir_in;  in syscon_gpio_probe()
253 	if (priv->data->flags & GPIO_SYSCON_FEAT_OUT) {  in syscon_gpio_probe()
254 		priv->chip.set = priv->data->set ? : syscon_gpio_set;  in syscon_gpio_probe()
255 		priv->chip.direction_output = syscon_gpio_dir_out;  in syscon_gpio_probe()
258 	return devm_gpiochip_add_data(&pdev->dev, &priv->chip, priv);  in syscon_gpio_probe()
263 		.name		= "gpio-syscon",