^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) * tps6507x.c -- TPS6507x chip family multi-function driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Copyright (c) 2010 RidgeRun (todd.fischer@ridgerun.com)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Author: Todd Fischer
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * todd.fischer@ridgerun.com
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * Credits:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) * Using code from wm831x-*.c, wm8400-core, Wolfson Microelectronics PLC.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) * For licencing details see kernel-base/COPYING
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)
^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/moduleparam.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <linux/i2c.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <linux/of.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <linux/of_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include <linux/mfd/core.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include <linux/mfd/tps6507x.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) static const struct mfd_cell tps6507x_devs[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) .name = "tps6507x-pmic",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) .name = "tps6507x-ts",
^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)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) static int tps6507x_i2c_read_device(struct tps6507x_dev *tps6507x, char reg,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) int bytes, void *dest)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) struct i2c_client *i2c = tps6507x->i2c_client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) struct i2c_msg xfer[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) /* Write register */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) xfer[0].addr = i2c->addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) xfer[0].flags = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) xfer[0].len = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) xfer[0].buf = ®
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) /* Read data */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) xfer[1].addr = i2c->addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) xfer[1].flags = I2C_M_RD;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) xfer[1].len = bytes;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) xfer[1].buf = dest;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) ret = i2c_transfer(i2c->adapter, xfer, 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) if (ret == 2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) else if (ret >= 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) ret = -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) static int tps6507x_i2c_write_device(struct tps6507x_dev *tps6507x, char reg,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) int bytes, void *src)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) struct i2c_client *i2c = tps6507x->i2c_client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) /* we add 1 byte for device register */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) u8 msg[TPS6507X_MAX_REGISTER + 1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) if (bytes > TPS6507X_MAX_REGISTER)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) msg[0] = reg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) memcpy(&msg[1], src, bytes);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) ret = i2c_master_send(i2c, msg, bytes + 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) if (ret != bytes + 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) static int tps6507x_i2c_probe(struct i2c_client *i2c,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) const struct i2c_device_id *id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) struct tps6507x_dev *tps6507x;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) tps6507x = devm_kzalloc(&i2c->dev, sizeof(struct tps6507x_dev),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) if (tps6507x == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) i2c_set_clientdata(i2c, tps6507x);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) tps6507x->dev = &i2c->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) tps6507x->i2c_client = i2c;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) tps6507x->read_dev = tps6507x_i2c_read_device;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) tps6507x->write_dev = tps6507x_i2c_write_device;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) return devm_mfd_add_devices(tps6507x->dev, -1, tps6507x_devs,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) ARRAY_SIZE(tps6507x_devs), NULL, 0, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) static const struct i2c_device_id tps6507x_i2c_id[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) { "tps6507x", 0 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) { }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) MODULE_DEVICE_TABLE(i2c, tps6507x_i2c_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) #ifdef CONFIG_OF
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) static const struct of_device_id tps6507x_of_match[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) {.compatible = "ti,tps6507x", },
^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_DEVICE_TABLE(of, tps6507x_of_match);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) static struct i2c_driver tps6507x_i2c_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) .name = "tps6507x",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) .of_match_table = of_match_ptr(tps6507x_of_match),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) .probe = tps6507x_i2c_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) .id_table = tps6507x_i2c_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) static int __init tps6507x_i2c_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) return i2c_add_driver(&tps6507x_i2c_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) /* init early so consumer devices can complete system boot */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) subsys_initcall(tps6507x_i2c_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) static void __exit tps6507x_i2c_exit(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) i2c_del_driver(&tps6507x_i2c_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) module_exit(tps6507x_i2c_exit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) MODULE_DESCRIPTION("TPS6507x chip family multi-function driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) MODULE_LICENSE("GPL");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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