^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) * Copyright (C) 2015 Texas Instruments Incorporated - http://www.ti.com/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Andrew F. Davis <afd@ti.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * This program is free software; you can redistribute it and/or
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * modify it under the terms of the GNU General Public License version 2 as
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * published by the Free Software Foundation.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * This program is distributed "as is" WITHOUT ANY WARRANTY of any
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) * kind, whether expressed or implied; without even the implied warranty
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) * GNU General Public License version 2 for more details.
^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) #include <linux/gpio/driver.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/i2c.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/mutex.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #define TPIC2810_WS_COMMAND 0x44
^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) * struct tpic2810 - GPIO driver data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) * @chip: GPIO controller chip
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) * @client: I2C device pointer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) * @buffer: Buffer for device register
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) * @lock: Protects write sequences
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) struct tpic2810 {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) struct gpio_chip chip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) struct i2c_client *client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) u8 buffer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) struct mutex lock;
^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 tpic2810_set(struct gpio_chip *chip, unsigned offset, int value);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) static int tpic2810_get_direction(struct gpio_chip *chip,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) unsigned offset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) /* This device always output */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) return GPIO_LINE_DIRECTION_OUT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) static int tpic2810_direction_input(struct gpio_chip *chip,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) unsigned offset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) /* This device is output only */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) return -EINVAL;
^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 int tpic2810_direction_output(struct gpio_chip *chip,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) unsigned offset, int value)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) /* This device always output */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) tpic2810_set(chip, offset, value);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) static void tpic2810_set_mask_bits(struct gpio_chip *chip, u8 mask, u8 bits)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) struct tpic2810 *gpio = gpiochip_get_data(chip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) u8 buffer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) mutex_lock(&gpio->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) buffer = gpio->buffer & ~mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) buffer |= (mask & bits);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) err = i2c_smbus_write_byte_data(gpio->client, TPIC2810_WS_COMMAND,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) buffer);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) if (!err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) gpio->buffer = buffer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) mutex_unlock(&gpio->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) static void tpic2810_set(struct gpio_chip *chip, unsigned offset, int value)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) tpic2810_set_mask_bits(chip, BIT(offset), value ? BIT(offset) : 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) static void tpic2810_set_multiple(struct gpio_chip *chip, unsigned long *mask,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) unsigned long *bits)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) tpic2810_set_mask_bits(chip, *mask, *bits);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) static const struct gpio_chip template_chip = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) .label = "tpic2810",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) .owner = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) .get_direction = tpic2810_get_direction,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) .direction_input = tpic2810_direction_input,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) .direction_output = tpic2810_direction_output,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) .set = tpic2810_set,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) .set_multiple = tpic2810_set_multiple,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) .base = -1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) .ngpio = 8,
^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 const struct of_device_id tpic2810_of_match_table[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) { .compatible = "ti,tpic2810" },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) { /* sentinel */ }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) MODULE_DEVICE_TABLE(of, tpic2810_of_match_table);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) static int tpic2810_probe(struct i2c_client *client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) const struct i2c_device_id *id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) struct tpic2810 *gpio;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) gpio = devm_kzalloc(&client->dev, sizeof(*gpio), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) if (!gpio)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) i2c_set_clientdata(client, gpio);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) gpio->chip = template_chip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) gpio->chip.parent = &client->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) gpio->client = client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) mutex_init(&gpio->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) ret = gpiochip_add_data(&gpio->chip, gpio);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) dev_err(&client->dev, "Unable to register gpiochip\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) static int tpic2810_remove(struct i2c_client *client)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) struct tpic2810 *gpio = i2c_get_clientdata(client);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) gpiochip_remove(&gpio->chip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) static const struct i2c_device_id tpic2810_id_table[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) { "tpic2810", },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) { /* sentinel */ }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) MODULE_DEVICE_TABLE(i2c, tpic2810_id_table);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) static struct i2c_driver tpic2810_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) .name = "tpic2810",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) .of_match_table = tpic2810_of_match_table,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) .probe = tpic2810_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) .remove = tpic2810_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) .id_table = tpic2810_id_table,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) module_i2c_driver(tpic2810_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) MODULE_AUTHOR("Andrew F. Davis <afd@ti.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) MODULE_DESCRIPTION("TPIC2810 8-Bit LED Driver GPIO Driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) MODULE_LICENSE("GPL v2");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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