1 // SPDX-License-Identifier: GPL-2.0
3  * Driver for the ps-mode pin configuration.
16 #include <linux/firmware/xlnx-zynqmp.h>
18 /* 4-bit boot mode pins */
22  * modepin_gpio_get_value - Get the state of the specified pin of GPIO device
23  * @chip:	gpio_chip instance to be worked on
28  * Return: 0 if the pin is low, 1 if pin is high, -EINVAL wrong pin configured
31 static int modepin_gpio_get_value(struct gpio_chip *chip, unsigned int pin)  in modepin_gpio_get_value()  argument
50  * modepin_gpio_set_value - Modify the state of the pin with specified value
51  * @chip:	gpio_chip instance to be worked on
60 static int modepin_gpio_set_value(struct gpio_chip *chip, unsigned int pin,  in modepin_gpio_set_value()  argument
85  * modepin_gpio_dir_in - Set the direction of the specified GPIO pin as input
86  * @chip:	gpio_chip instance to be worked on
91 static int modepin_gpio_dir_in(struct gpio_chip *chip, unsigned int pin)  in modepin_gpio_dir_in()  argument
97  * modepin_gpio_dir_out - Set the direction of the specified GPIO pin as output
98  * @chip:	gpio_chip instance to be worked on
104 static int modepin_gpio_dir_out(struct gpio_chip *chip, unsigned int pin,  in modepin_gpio_dir_out()  argument
107 	return modepin_gpio_set_value(chip, pin, state);  in modepin_gpio_dir_out()
111  * modepin_gpio_probe - Initialization method for modepin_gpio
114  * Return: 0 on success, negative error otherwise.
118 	struct gpio_chip *chip;  in modepin_gpio_probe()  local
121 	chip = devm_kzalloc(&pdev->dev, sizeof(*chip), GFP_KERNEL);  in modepin_gpio_probe()
122 	if (!chip)  in modepin_gpio_probe()
123 		return -ENOMEM;  in modepin_gpio_probe()
125 	platform_set_drvdata(pdev, chip);  in modepin_gpio_probe()
127 	/* configure the gpio chip */  in modepin_gpio_probe()
128 	chip->base = -1;  in modepin_gpio_probe()
129 	chip->ngpio = MODE_PINS;  in modepin_gpio_probe()
130 	chip->owner = THIS_MODULE;  in modepin_gpio_probe()
131 	chip->parent = &pdev->dev;  in modepin_gpio_probe()
132 	chip->get = modepin_gpio_get_value;  in modepin_gpio_probe()
133 	chip->set = modepin_gpio_set_value;  in modepin_gpio_probe()
134 	chip->direction_input = modepin_gpio_dir_in;  in modepin_gpio_probe()
135 	chip->direction_output = modepin_gpio_dir_out;  in modepin_gpio_probe()
136 	chip->label = dev_name(&pdev->dev);  in modepin_gpio_probe()
139 	status = devm_gpiochip_add_data(&pdev->dev, chip, chip);  in modepin_gpio_probe()
141 		return dev_err_probe(&pdev->dev, status,  in modepin_gpio_probe()
142 			      "Failed to add GPIO chip\n");  in modepin_gpio_probe()
148 	{ .compatible = "xlnx,zynqmp-gpio-modepin", },
155 		.name = "modepin-gpio",