1 // SPDX-License-Identifier: GPL-2.0
7  *   - add pinmux and pinctrl support (gpio alternate mode)
10  * [1] https://www.dialog-semiconductor.com/sites/default/files/da9062_datasheet_3v6.pdf
18 #include <linux/regmap.h>
27  * the gpio is active low without a vendor specific dt-binding.
35 #define DA9062_PIN_GPO_OD		0x02 /* gpio out open-drain */
36 #define DA9062_PIN_GPO_PP		0x03 /* gpio out push-pull */
45 static int da9062_pctl_get_pin_mode(struct da9062_pctl *pctl,  in da9062_pctl_get_pin_mode()  argument
48 	struct regmap *regmap = pctl->da9062->regmap;  in da9062_pctl_get_pin_mode()  local
51 	ret = regmap_read(regmap, DA9062AA_GPIO_0_1 + (offset >> 1), &val);  in da9062_pctl_get_pin_mode()
61 static int da9062_pctl_set_pin_mode(struct da9062_pctl *pctl,  in da9062_pctl_set_pin_mode()  argument
64 	struct regmap *regmap = pctl->da9062->regmap;  in da9062_pctl_set_pin_mode()  local
73 	ret = regmap_update_bits(regmap, DA9062AA_GPIO_0_1 + (offset >> 1),  in da9062_pctl_set_pin_mode()
76 		pctl->pin_config[offset] = mode_req;  in da9062_pctl_set_pin_mode()
83 	struct da9062_pctl *pctl = gpiochip_get_data(gc);  in da9062_gpio_get()  local
84 	struct regmap *regmap = pctl->da9062->regmap;  in da9062_gpio_get()  local
88 	gpio_mode = da9062_pctl_get_pin_mode(pctl, offset);  in da9062_gpio_get()
94 		return -ENOTSUPP;  in da9062_gpio_get()
96 		ret = regmap_read(regmap, DA9062AA_STATUS_B, &val);  in da9062_gpio_get()
102 		ret = regmap_read(regmap, DA9062AA_GPIO_MODE0_4, &val);  in da9062_gpio_get()
113 	struct da9062_pctl *pctl = gpiochip_get_data(gc);  in da9062_gpio_set()  local
114 	struct regmap *regmap = pctl->da9062->regmap;  in da9062_gpio_set()  local
116 	regmap_update_bits(regmap, DA9062AA_GPIO_MODE0_4, BIT(offset),  in da9062_gpio_set()
122 	struct da9062_pctl *pctl = gpiochip_get_data(gc);  in da9062_gpio_get_direction()  local
125 	gpio_mode = da9062_pctl_get_pin_mode(pctl, offset);  in da9062_gpio_get_direction()
131 		return -ENOTSUPP;  in da9062_gpio_get_direction()
139 	return -EINVAL;  in da9062_gpio_get_direction()
145 	struct da9062_pctl *pctl = gpiochip_get_data(gc);  in da9062_gpio_direction_input()  local
146 	struct regmap *regmap = pctl->da9062->regmap;  in da9062_gpio_direction_input()  local
151 	ret = da9062_pctl_set_pin_mode(pctl, offset, DA9062_PIN_GPI);  in da9062_gpio_direction_input()
157 	 * about gpio_get() because we read and return the gpio-level. So the  in da9062_gpio_direction_input()
160 	 * 0 - active low, 1 - active high  in da9062_gpio_direction_input()
164 	return regmap_update_bits(regmap, DA9062AA_GPIO_0_1 + (offset >> 1),  in da9062_gpio_direction_input()
172 	struct da9062_pctl *pctl = gpiochip_get_data(gc);  in da9062_gpio_direction_output()  local
173 	unsigned int pin_config = pctl->pin_config[offset];  in da9062_gpio_direction_output()
176 	ret = da9062_pctl_set_pin_mode(pctl, offset, pin_config);  in da9062_gpio_direction_output()
188 	struct da9062_pctl *pctl = gpiochip_get_data(gc);  in da9062_gpio_set_config()  local
189 	struct regmap *regmap = pctl->da9062->regmap;  in da9062_gpio_set_config()  local
194 	 * - PIN_CONFIG_BIAS_PULL_DOWN -> only allowed if the pin is used as  in da9062_gpio_set_config()
196 	 * - PIN_CONFIG_BIAS_PULL_UP   -> only allowed if the pin is used as  in da9062_gpio_set_config()
197 	 *				  gpio output open-drain.  in da9062_gpio_set_config()
202 		return regmap_update_bits(regmap, DA9062AA_CONFIG_K,  in da9062_gpio_set_config()
205 		gpio_mode = da9062_pctl_get_pin_mode(pctl, offset);  in da9062_gpio_set_config()
207 			return -EINVAL;  in da9062_gpio_set_config()
209 			return -ENOTSUPP;  in da9062_gpio_set_config()
210 		return regmap_update_bits(regmap, DA9062AA_CONFIG_K,  in da9062_gpio_set_config()
213 		gpio_mode = da9062_pctl_get_pin_mode(pctl, offset);  in da9062_gpio_set_config()
215 			return -EINVAL;  in da9062_gpio_set_config()
217 			return -ENOTSUPP;  in da9062_gpio_set_config()
218 		return regmap_update_bits(regmap, DA9062AA_CONFIG_K,  in da9062_gpio_set_config()
221 		return da9062_pctl_set_pin_mode(pctl, offset,  in da9062_gpio_set_config()
224 		return da9062_pctl_set_pin_mode(pctl, offset,  in da9062_gpio_set_config()
227 		return -ENOTSUPP;  in da9062_gpio_set_config()
233 	struct da9062_pctl *pctl = gpiochip_get_data(gc);  in da9062_gpio_to_irq()  local
234 	struct da9062 *da9062 = pctl->da9062;  in da9062_gpio_to_irq()
236 	return regmap_irq_get_virq(da9062->regmap_irq,  in da9062_gpio_to_irq()
251 	.base = -1,
256 	struct device *parent = pdev->dev.parent;  in da9062_pctl_probe()
257 	struct da9062_pctl *pctl;  in da9062_pctl_probe()  local
260 	device_set_node(&pdev->dev, dev_fwnode(pdev->dev.parent));  in da9062_pctl_probe()
262 	pctl = devm_kzalloc(&pdev->dev, sizeof(*pctl), GFP_KERNEL);  in da9062_pctl_probe()
263 	if (!pctl)  in da9062_pctl_probe()
264 		return -ENOMEM;  in da9062_pctl_probe()
266 	pctl->da9062 = dev_get_drvdata(parent);  in da9062_pctl_probe()
267 	if (!pctl->da9062)  in da9062_pctl_probe()
268 		return -EINVAL;  in da9062_pctl_probe()
270 	if (!device_property_present(parent, "gpio-controller"))  in da9062_pctl_probe()
273 	for (i = 0; i < ARRAY_SIZE(pctl->pin_config); i++)  in da9062_pctl_probe()
274 		pctl->pin_config[i] = DA9062_PIN_GPO_PP;  in da9062_pctl_probe()
280 	pctl->gc = reference_gc;  in da9062_pctl_probe()
281 	pctl->gc.label = dev_name(&pdev->dev);  in da9062_pctl_probe()
282 	pctl->gc.parent = &pdev->dev;  in da9062_pctl_probe()
284 	platform_set_drvdata(pdev, pctl);  in da9062_pctl_probe()
286 	return devm_gpiochip_add_data(&pdev->dev, &pctl->gc, pctl);  in da9062_pctl_probe()
292 		.name	= "da9062-gpio",
300 MODULE_ALIAS("platform:da9062-gpio");