^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0+
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * gpiolib support for Wolfson WM835x PMICs
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright 2009 Wolfson Microelectronics PLC.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
^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)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/gpio/driver.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/mfd/core.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/seq_file.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/mfd/wm8350/core.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/mfd/wm8350/gpio.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) struct wm8350_gpio_data {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) struct wm8350 *wm8350;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) struct gpio_chip gpio_chip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) static int wm8350_gpio_direction_in(struct gpio_chip *chip, unsigned offset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) struct wm8350_gpio_data *wm8350_gpio = gpiochip_get_data(chip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) struct wm8350 *wm8350 = wm8350_gpio->wm8350;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) return wm8350_set_bits(wm8350, WM8350_GPIO_CONFIGURATION_I_O,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 1 << offset);
^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 int wm8350_gpio_get(struct gpio_chip *chip, unsigned offset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) struct wm8350_gpio_data *wm8350_gpio = gpiochip_get_data(chip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) struct wm8350 *wm8350 = wm8350_gpio->wm8350;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) ret = wm8350_reg_read(wm8350, WM8350_GPIO_LEVEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) if (ret & (1 << offset))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) static void wm8350_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) struct wm8350_gpio_data *wm8350_gpio = gpiochip_get_data(chip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) struct wm8350 *wm8350 = wm8350_gpio->wm8350;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) if (value)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) wm8350_set_bits(wm8350, WM8350_GPIO_LEVEL, 1 << offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) wm8350_clear_bits(wm8350, WM8350_GPIO_LEVEL, 1 << offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) static int wm8350_gpio_direction_out(struct gpio_chip *chip,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) unsigned offset, int value)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) struct wm8350_gpio_data *wm8350_gpio = gpiochip_get_data(chip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) struct wm8350 *wm8350 = wm8350_gpio->wm8350;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) ret = wm8350_clear_bits(wm8350, WM8350_GPIO_CONFIGURATION_I_O,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) 1 << offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) /* Don't have an atomic direction/value setup */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) wm8350_gpio_set(chip, offset, value);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) static int wm8350_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) struct wm8350_gpio_data *wm8350_gpio = gpiochip_get_data(chip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) struct wm8350 *wm8350 = wm8350_gpio->wm8350;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) if (!wm8350->irq_base)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) return wm8350->irq_base + WM8350_IRQ_GPIO(offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) static const struct gpio_chip template_chip = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) .label = "wm8350",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) .owner = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) .direction_input = wm8350_gpio_direction_in,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) .get = wm8350_gpio_get,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) .direction_output = wm8350_gpio_direction_out,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) .set = wm8350_gpio_set,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) .to_irq = wm8350_gpio_to_irq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) .can_sleep = true,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) static int wm8350_gpio_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) struct wm8350 *wm8350 = dev_get_drvdata(pdev->dev.parent);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) struct wm8350_platform_data *pdata = dev_get_platdata(wm8350->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) struct wm8350_gpio_data *wm8350_gpio;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) wm8350_gpio = devm_kzalloc(&pdev->dev, sizeof(*wm8350_gpio),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) if (wm8350_gpio == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) wm8350_gpio->wm8350 = wm8350;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) wm8350_gpio->gpio_chip = template_chip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) wm8350_gpio->gpio_chip.ngpio = 13;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) wm8350_gpio->gpio_chip.parent = &pdev->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) if (pdata && pdata->gpio_base)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) wm8350_gpio->gpio_chip.base = pdata->gpio_base;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) wm8350_gpio->gpio_chip.base = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) ret = devm_gpiochip_add_data(&pdev->dev, &wm8350_gpio->gpio_chip,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) wm8350_gpio);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) dev_err(&pdev->dev, "Could not register gpiochip, %d\n", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) platform_set_drvdata(pdev, wm8350_gpio);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) static struct platform_driver wm8350_gpio_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) .driver.name = "wm8350-gpio",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) .probe = wm8350_gpio_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) static int __init wm8350_gpio_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) return platform_driver_register(&wm8350_gpio_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) subsys_initcall(wm8350_gpio_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) static void __exit wm8350_gpio_exit(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) platform_driver_unregister(&wm8350_gpio_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) module_exit(wm8350_gpio_exit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) MODULE_DESCRIPTION("GPIO interface for WM8350 PMICs");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) MODULE_ALIAS("platform:wm8350-gpio");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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