^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Copyright Intel Corporation (C) 2014-2016. All Rights Reserved
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * GPIO driver for Altera Arria10 MAX5 System Resource Chip
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Adapted from gpio-tps65910.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/gpio/driver.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/mfd/altera-a10sr.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) * struct altr_a10sr_gpio - Altera Max5 GPIO device private data structure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) * @gp: : instance of the gpio_chip
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) * @regmap: the regmap from the parent device.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) struct altr_a10sr_gpio {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) struct gpio_chip gp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) struct regmap *regmap;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) static int altr_a10sr_gpio_get(struct gpio_chip *chip, unsigned int offset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) struct altr_a10sr_gpio *gpio = gpiochip_get_data(chip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) int ret, val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) ret = regmap_read(gpio->regmap, ALTR_A10SR_PBDSW_REG, &val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) return !!(val & BIT(offset - ALTR_A10SR_LED_VALID_SHIFT));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) static void altr_a10sr_gpio_set(struct gpio_chip *chip, unsigned int offset,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) int value)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) struct altr_a10sr_gpio *gpio = gpiochip_get_data(chip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) regmap_update_bits(gpio->regmap, ALTR_A10SR_LED_REG,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) BIT(ALTR_A10SR_LED_VALID_SHIFT + offset),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) value ? BIT(ALTR_A10SR_LED_VALID_SHIFT + offset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) : 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) static int altr_a10sr_gpio_direction_input(struct gpio_chip *gc,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) unsigned int nr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) if (nr < (ALTR_A10SR_IN_VALID_RANGE_LO - ALTR_A10SR_LED_VALID_SHIFT))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) static int altr_a10sr_gpio_direction_output(struct gpio_chip *gc,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) unsigned int nr, int value)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) if (nr > (ALTR_A10SR_OUT_VALID_RANGE_HI - ALTR_A10SR_LED_VALID_SHIFT))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) altr_a10sr_gpio_set(gc, nr, value);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) static const struct gpio_chip altr_a10sr_gc = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) .label = "altr_a10sr_gpio",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) .owner = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) .get = altr_a10sr_gpio_get,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) .set = altr_a10sr_gpio_set,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) .direction_input = altr_a10sr_gpio_direction_input,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) .direction_output = altr_a10sr_gpio_direction_output,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) .can_sleep = true,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) .ngpio = 12,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) .base = -1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) static int altr_a10sr_gpio_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) struct altr_a10sr_gpio *gpio;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) struct altr_a10sr *a10sr = dev_get_drvdata(pdev->dev.parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) gpio = devm_kzalloc(&pdev->dev, sizeof(*gpio), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) if (!gpio)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) gpio->regmap = a10sr->regmap;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) gpio->gp = altr_a10sr_gc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) gpio->gp.parent = pdev->dev.parent;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) gpio->gp.of_node = pdev->dev.of_node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) ret = devm_gpiochip_add_data(&pdev->dev, &gpio->gp, gpio);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) dev_err(&pdev->dev, "Could not register gpiochip, %d\n", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) platform_set_drvdata(pdev, gpio);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) static const struct of_device_id altr_a10sr_gpio_of_match[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) { .compatible = "altr,a10sr-gpio" },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) { },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) MODULE_DEVICE_TABLE(of, altr_a10sr_gpio_of_match);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) static struct platform_driver altr_a10sr_gpio_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) .probe = altr_a10sr_gpio_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) .name = "altr_a10sr_gpio",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) .of_match_table = of_match_ptr(altr_a10sr_gpio_of_match),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) module_platform_driver(altr_a10sr_gpio_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) MODULE_LICENSE("GPL v2");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) MODULE_AUTHOR("Thor Thayer <tthayer@opensource.altera.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) MODULE_DESCRIPTION("Altera Arria10 System Resource Chip GPIO");
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Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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