1 // SPDX-License-Identifier: GPL-2.0-only
6 #include <linux/gpio/driver.h>
15  * struct airoha_gpio_ctrl - Airoha GPIO driver data
34 static int airoha_dir_set(struct gpio_chip *gc, unsigned int gpio,  in airoha_dir_set()  argument
37 	struct airoha_gpio_ctrl *ctrl = gc_to_ctrl(gc);  in airoha_dir_set()  local
38 	u32 dir = ioread32(ctrl->dir[gpio / 16]);  in airoha_dir_set()
39 	u32 output = ioread32(ctrl->output);  in airoha_dir_set()
40 	u32 mask = BIT((gpio % 16) * 2);  in airoha_dir_set()
44 		output |= BIT(gpio);  in airoha_dir_set()
47 		output &= ~BIT(gpio);  in airoha_dir_set()
50 	iowrite32(dir, ctrl->dir[gpio / 16]);  in airoha_dir_set()
53 		gc->set(gc, gpio, val);  in airoha_dir_set()
55 	iowrite32(output, ctrl->output);  in airoha_dir_set()
60 static int airoha_dir_out(struct gpio_chip *gc, unsigned int gpio,  in airoha_dir_out()  argument
63 	return airoha_dir_set(gc, gpio, val, 1);  in airoha_dir_out()
66 static int airoha_dir_in(struct gpio_chip *gc, unsigned int gpio)  in airoha_dir_in()  argument
68 	return airoha_dir_set(gc, gpio, 0, 0);  in airoha_dir_in()
71 static int airoha_get_dir(struct gpio_chip *gc, unsigned int gpio)  in airoha_get_dir()  argument
73 	struct airoha_gpio_ctrl *ctrl = gc_to_ctrl(gc);  in airoha_get_dir()  local
74 	u32 dir = ioread32(ctrl->dir[gpio / 16]);  in airoha_get_dir()
75 	u32 mask = BIT((gpio % 16) * 2);  in airoha_get_dir()
82 	struct device *dev = &pdev->dev;  in airoha_gpio_probe()
83 	struct airoha_gpio_ctrl *ctrl;  in airoha_gpio_probe()  local
86 	ctrl = devm_kzalloc(dev, sizeof(*ctrl), GFP_KERNEL);  in airoha_gpio_probe()
87 	if (!ctrl)  in airoha_gpio_probe()
88 		return -ENOMEM;  in airoha_gpio_probe()
90 	ctrl->data = devm_platform_ioremap_resource(pdev, 0);  in airoha_gpio_probe()
91 	if (IS_ERR(ctrl->data))  in airoha_gpio_probe()
92 		return PTR_ERR(ctrl->data);  in airoha_gpio_probe()
94 	ctrl->dir[0] = devm_platform_ioremap_resource(pdev, 1);  in airoha_gpio_probe()
95 	if (IS_ERR(ctrl->dir[0]))  in airoha_gpio_probe()
96 		return PTR_ERR(ctrl->dir[0]);  in airoha_gpio_probe()
98 	ctrl->dir[1] = devm_platform_ioremap_resource(pdev, 2);  in airoha_gpio_probe()
99 	if (IS_ERR(ctrl->dir[1]))  in airoha_gpio_probe()
100 		return PTR_ERR(ctrl->dir[1]);  in airoha_gpio_probe()
102 	ctrl->output = devm_platform_ioremap_resource(pdev, 3);  in airoha_gpio_probe()
103 	if (IS_ERR(ctrl->output))  in airoha_gpio_probe()
104 		return PTR_ERR(ctrl->output);  in airoha_gpio_probe()
106 	err = bgpio_init(&ctrl->gc, dev, 4, ctrl->data, NULL,  in airoha_gpio_probe()
109 		return dev_err_probe(dev, err, "unable to init generic GPIO");  in airoha_gpio_probe()
111 	ctrl->gc.ngpio = AIROHA_GPIO_MAX;  in airoha_gpio_probe()
112 	ctrl->gc.owner = THIS_MODULE;  in airoha_gpio_probe()
113 	ctrl->gc.direction_output = airoha_dir_out;  in airoha_gpio_probe()
114 	ctrl->gc.direction_input = airoha_dir_in;  in airoha_gpio_probe()
115 	ctrl->gc.get_direction = airoha_get_dir;  in airoha_gpio_probe()
117 	return devm_gpiochip_add_data(dev, &ctrl->gc, ctrl);  in airoha_gpio_probe()
121 	{ .compatible = "airoha,en7523-gpio" },
128 		.name = "airoha-gpio",
135 MODULE_DESCRIPTION("Airoha GPIO support");