Orange Pi5 kernel

^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)  * TPS68470 chip Parent driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5)  * Copyright (C) 2017 Intel Corporation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7)  * Authors:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8)  *	Rajmohan Mani <rajmohan.mani@intel.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9)  *	Tianshu Qiu <tian.shu.qiu@intel.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)  *	Jian Xu Zheng <jian.xu.zheng@intel.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11)  *	Yuning Pu <yuning.pu@intel.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/acpi.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/delay.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/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/mfd/core.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/mfd/tps68470.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/regmap.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) static const struct mfd_cell tps68470s[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 	{ .name = "tps68470-gpio" },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 	{ .name = "tps68470_pmic_opregion" },
^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 const struct regmap_config tps68470_regmap_config = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 	.reg_bits = 8,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 	.val_bits = 8,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 	.max_register = TPS68470_REG_MAX,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) static int tps68470_chip_init(struct device *dev, struct regmap *regmap)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 	unsigned int version;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 	/* Force software reset */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 	ret = regmap_write(regmap, TPS68470_REG_RESET, TPS68470_REG_RESET_MASK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 	if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 	ret = regmap_read(regmap, TPS68470_REG_REVID, &version);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 	if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 		dev_err(dev, "Failed to read revision register: %d\n", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) 	dev_info(dev, "TPS68470 REVID: 0x%x\n", version);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) static int tps68470_probe(struct i2c_client *client)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) 	struct device *dev = &client->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) 	struct regmap *regmap;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) 	regmap = devm_regmap_init_i2c(client, &tps68470_regmap_config);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) 	if (IS_ERR(regmap)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) 		dev_err(dev, "devm_regmap_init_i2c Error %ld\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) 			PTR_ERR(regmap));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) 		return PTR_ERR(regmap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) 	i2c_set_clientdata(client, regmap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) 	ret = tps68470_chip_init(dev, regmap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) 	if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) 		dev_err(dev, "TPS68470 Init Error %d\n", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) 	ret = devm_mfd_add_devices(dev, PLATFORM_DEVID_NONE, tps68470s,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) 			      ARRAY_SIZE(tps68470s), NULL, 0, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) 	if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) 		dev_err(dev, "devm_mfd_add_devices failed: %d\n", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) static const struct acpi_device_id tps68470_acpi_ids[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) 	{"INT3472"},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) 	{},
^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 struct i2c_driver tps68470_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) 	.driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) 		   .name = "tps68470",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) 		   .acpi_match_table = tps68470_acpi_ids,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) 	.probe_new = tps68470_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) builtin_i2c_driver(tps68470_driver);