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
17 #include <linux/regmap.h>
26  * the gpio is active low without a vendor specific dt-binding.
34 #define DA9062_PIN_GPO_OD		0x02 /* gpio out open-drain */
35 #define DA9062_PIN_GPO_PP		0x03 /* gpio out push-pull */
44 static int da9062_pctl_get_pin_mode(struct da9062_pctl *pctl,  in da9062_pctl_get_pin_mode()  argument
47 	struct regmap *regmap = pctl->da9062->regmap;  in da9062_pctl_get_pin_mode()  local
50 	ret = regmap_read(regmap, DA9062AA_GPIO_0_1 + (offset >> 1), &val);  in da9062_pctl_get_pin_mode()
60 static int da9062_pctl_set_pin_mode(struct da9062_pctl *pctl,  in da9062_pctl_set_pin_mode()  argument
63 	struct regmap *regmap = pctl->da9062->regmap;  in da9062_pctl_set_pin_mode()  local
72 	ret = regmap_update_bits(regmap, DA9062AA_GPIO_0_1 + (offset >> 1),  in da9062_pctl_set_pin_mode()
75 		pctl->pin_config[offset] = mode_req;  in da9062_pctl_set_pin_mode()
82 	struct da9062_pctl *pctl = gpiochip_get_data(gc);  in da9062_gpio_get()  local
83 	struct regmap *regmap = pctl->da9062->regmap;  in da9062_gpio_get()  local
87 	gpio_mode = da9062_pctl_get_pin_mode(pctl, offset);  in da9062_gpio_get()
93 		return -ENOTSUPP;  in da9062_gpio_get()
95 		ret = regmap_read(regmap, DA9062AA_STATUS_B, &val);  in da9062_gpio_get()
101 		ret = regmap_read(regmap, DA9062AA_GPIO_MODE0_4, &val);  in da9062_gpio_get()
112 	struct da9062_pctl *pctl = gpiochip_get_data(gc);  in da9062_gpio_set()  local
113 	struct regmap *regmap = pctl->da9062->regmap;  in da9062_gpio_set()  local
115 	regmap_update_bits(regmap, DA9062AA_GPIO_MODE0_4, BIT(offset),  in da9062_gpio_set()
121 	struct da9062_pctl *pctl = gpiochip_get_data(gc);  in da9062_gpio_get_direction()  local
124 	gpio_mode = da9062_pctl_get_pin_mode(pctl, offset);  in da9062_gpio_get_direction()
130 		return -ENOTSUPP;  in da9062_gpio_get_direction()
138 	return -EINVAL;  in da9062_gpio_get_direction()
144 	struct da9062_pctl *pctl = gpiochip_get_data(gc);  in da9062_gpio_direction_input()  local
145 	struct regmap *regmap = pctl->da9062->regmap;  in da9062_gpio_direction_input()  local
150 	ret = da9062_pctl_set_pin_mode(pctl, offset, DA9062_PIN_GPI);  in da9062_gpio_direction_input()
156 	 * about gpio_get() because we read and return the gpio-level. So the  in da9062_gpio_direction_input()
159 	 * 0 - active low, 1 - active high  in da9062_gpio_direction_input()
163 	return regmap_update_bits(regmap, DA9062AA_GPIO_0_1 + (offset >> 1),  in da9062_gpio_direction_input()
171 	struct da9062_pctl *pctl = gpiochip_get_data(gc);  in da9062_gpio_direction_output()  local
172 	unsigned int pin_config = pctl->pin_config[offset];  in da9062_gpio_direction_output()
175 	ret = da9062_pctl_set_pin_mode(pctl, offset, pin_config);  in da9062_gpio_direction_output()
187 	struct da9062_pctl *pctl = gpiochip_get_data(gc);  in da9062_gpio_set_config()  local
188 	struct regmap *regmap = pctl->da9062->regmap;  in da9062_gpio_set_config()  local
193 	 * - PIN_CONFIG_BIAS_PULL_DOWN -> only allowed if the pin is used as  in da9062_gpio_set_config()
195 	 * - PIN_CONFIG_BIAS_PULL_UP   -> only allowed if the pin is used as  in da9062_gpio_set_config()
196 	 *				  gpio output open-drain.  in da9062_gpio_set_config()
201 		return regmap_update_bits(regmap, DA9062AA_CONFIG_K,  in da9062_gpio_set_config()
204 		gpio_mode = da9062_pctl_get_pin_mode(pctl, offset);  in da9062_gpio_set_config()
206 			return -EINVAL;  in da9062_gpio_set_config()
208 			return -ENOTSUPP;  in da9062_gpio_set_config()
209 		return regmap_update_bits(regmap, DA9062AA_CONFIG_K,  in da9062_gpio_set_config()
212 		gpio_mode = da9062_pctl_get_pin_mode(pctl, offset);  in da9062_gpio_set_config()
214 			return -EINVAL;  in da9062_gpio_set_config()
216 			return -ENOTSUPP;  in da9062_gpio_set_config()
217 		return regmap_update_bits(regmap, DA9062AA_CONFIG_K,  in da9062_gpio_set_config()
220 		return da9062_pctl_set_pin_mode(pctl, offset,  in da9062_gpio_set_config()
223 		return da9062_pctl_set_pin_mode(pctl, offset,  in da9062_gpio_set_config()
226 		return -ENOTSUPP;  in da9062_gpio_set_config()
232 	struct da9062_pctl *pctl = gpiochip_get_data(gc);  in da9062_gpio_to_irq()  local
233 	struct da9062 *da9062 = pctl->da9062;  in da9062_gpio_to_irq()
235 	return regmap_irq_get_virq(da9062->regmap_irq,  in da9062_gpio_to_irq()
250 	.base = -1,
255 	struct device *parent = pdev->dev.parent;  in da9062_pctl_probe()
256 	struct da9062_pctl *pctl;  in da9062_pctl_probe()  local
259 	pctl = devm_kzalloc(&pdev->dev, sizeof(*pctl), GFP_KERNEL);  in da9062_pctl_probe()
260 	if (!pctl)  in da9062_pctl_probe()
261 		return -ENOMEM;  in da9062_pctl_probe()
263 	pctl->da9062 = dev_get_drvdata(parent);  in da9062_pctl_probe()
264 	if (!pctl->da9062)  in da9062_pctl_probe()
265 		return -EINVAL;  in da9062_pctl_probe()
267 	if (!device_property_present(parent, "gpio-controller"))  in da9062_pctl_probe()
270 	for (i = 0; i < ARRAY_SIZE(pctl->pin_config); i++)  in da9062_pctl_probe()
271 		pctl->pin_config[i] = DA9062_PIN_GPO_PP;  in da9062_pctl_probe()
277 	pctl->gc = reference_gc;  in da9062_pctl_probe()
278 	pctl->gc.label = dev_name(&pdev->dev);  in da9062_pctl_probe()
279 	pctl->gc.parent = &pdev->dev;  in da9062_pctl_probe()
281 	pctl->gc.of_node = parent->of_node;  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");