^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * GPIO driver for Analog Devices ADP5520 MFD PMICs
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright 2009 Analog Devices Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/mfd/adp5520.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)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) struct adp5520_gpio {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) struct device *master;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) struct gpio_chip gpio_chip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) unsigned char lut[ADP5520_MAXGPIOS];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) unsigned long output;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) static int adp5520_gpio_get_value(struct gpio_chip *chip, unsigned off)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) struct adp5520_gpio *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) uint8_t reg_val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) dev = gpiochip_get_data(chip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) * There are dedicated registers for GPIO IN/OUT.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) * Make sure we return the right value, even when configured as output
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) if (test_bit(off, &dev->output))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) adp5520_read(dev->master, ADP5520_GPIO_OUT, ®_val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) adp5520_read(dev->master, ADP5520_GPIO_IN, ®_val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) return !!(reg_val & dev->lut[off]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) static void adp5520_gpio_set_value(struct gpio_chip *chip,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) unsigned off, int val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) struct adp5520_gpio *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) dev = gpiochip_get_data(chip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) if (val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) adp5520_set_bits(dev->master, ADP5520_GPIO_OUT, dev->lut[off]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) adp5520_clr_bits(dev->master, ADP5520_GPIO_OUT, dev->lut[off]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) static int adp5520_gpio_direction_input(struct gpio_chip *chip, unsigned off)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) struct adp5520_gpio *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) dev = gpiochip_get_data(chip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) clear_bit(off, &dev->output);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) return adp5520_clr_bits(dev->master, ADP5520_GPIO_CFG_2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) dev->lut[off]);
^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 int adp5520_gpio_direction_output(struct gpio_chip *chip,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) unsigned off, int val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) struct adp5520_gpio *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) dev = gpiochip_get_data(chip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) set_bit(off, &dev->output);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) if (val)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) ret |= adp5520_set_bits(dev->master, ADP5520_GPIO_OUT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) dev->lut[off]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) ret |= adp5520_clr_bits(dev->master, ADP5520_GPIO_OUT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) dev->lut[off]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) ret |= adp5520_set_bits(dev->master, ADP5520_GPIO_CFG_2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) dev->lut[off]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) static int adp5520_gpio_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) struct adp5520_gpio_platform_data *pdata = dev_get_platdata(&pdev->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) struct adp5520_gpio *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) struct gpio_chip *gc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) int ret, i, gpios;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) unsigned char ctl_mask = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) if (pdata == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) dev_err(&pdev->dev, "missing platform data\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) if (pdev->id != ID_ADP5520) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) dev_err(&pdev->dev, "only ADP5520 supports GPIO\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) if (dev == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) dev->master = pdev->dev.parent;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) for (gpios = 0, i = 0; i < ADP5520_MAXGPIOS; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) if (pdata->gpio_en_mask & (1 << i))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) dev->lut[gpios++] = 1 << i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) if (gpios < 1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) ret = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) gc = &dev->gpio_chip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) gc->direction_input = adp5520_gpio_direction_input;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) gc->direction_output = adp5520_gpio_direction_output;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) gc->get = adp5520_gpio_get_value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) gc->set = adp5520_gpio_set_value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) gc->can_sleep = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) gc->base = pdata->gpio_start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) gc->ngpio = gpios;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) gc->label = pdev->name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) gc->owner = THIS_MODULE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) ret = adp5520_clr_bits(dev->master, ADP5520_GPIO_CFG_1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) pdata->gpio_en_mask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) if (pdata->gpio_en_mask & ADP5520_GPIO_C3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) ctl_mask |= ADP5520_C3_MODE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) if (pdata->gpio_en_mask & ADP5520_GPIO_R3)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) ctl_mask |= ADP5520_R3_MODE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) if (ctl_mask)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) ret = adp5520_set_bits(dev->master, ADP5520_LED_CONTROL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) ctl_mask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) ret |= adp5520_set_bits(dev->master, ADP5520_GPIO_PULLUP,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) pdata->gpio_pullup_mask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) dev_err(&pdev->dev, "failed to write\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) ret = devm_gpiochip_add_data(&pdev->dev, &dev->gpio_chip, dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) platform_set_drvdata(pdev, dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) err:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) static struct platform_driver adp5520_gpio_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) .name = "adp5520-gpio",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) .probe = adp5520_gpio_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) module_platform_driver(adp5520_gpio_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) MODULE_AUTHOR("Michael Hennerich <michael.hennerich@analog.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) MODULE_DESCRIPTION("GPIO ADP5520 Driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) MODULE_ALIAS("platform:adp5520-gpio");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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