Orange Pi5 kernel

^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)  * dummy.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5)  * Copyright 2010 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)  * This is useful for systems with mixed controllable and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)  * non-controllable regulators, as well as for allowing testing on
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11)  * systems with no controllable regulators.
^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/err.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/export.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/regulator/driver.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/regulator/machine.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include "dummy.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) struct regulator_dev *dummy_regulator_rdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) static const struct regulator_init_data dummy_initdata = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 	.constraints = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 		.always_on = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) static const struct regulator_ops dummy_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) static const struct regulator_desc dummy_desc = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 	.name = "regulator-dummy",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 	.id = -1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 	.type = REGULATOR_VOLTAGE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 	.owner = THIS_MODULE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 	.ops = &dummy_ops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) static int dummy_regulator_probe(struct platform_device *pdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 	struct regulator_config config = { };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 	config.dev = &pdev->dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 	config.init_data = &dummy_initdata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) 	dummy_regulator_rdev = regulator_register(&dummy_desc, &config);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) 	if (IS_ERR(dummy_regulator_rdev)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) 		ret = PTR_ERR(dummy_regulator_rdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) 		pr_err("Failed to register regulator: %d\n", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) 		return ret;
^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) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) static struct platform_driver dummy_regulator_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) 	.probe		= dummy_regulator_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) 	.driver		= {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) 		.name		= "reg-dummy",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) 	},
^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 struct platform_device *dummy_pdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) void __init regulator_dummy_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) 	dummy_pdev = platform_device_alloc("reg-dummy", -1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) 	if (!dummy_pdev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) 		pr_err("Failed to allocate dummy regulator device\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) 	ret = platform_device_add(dummy_pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) 	if (ret != 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) 		pr_err("Failed to register dummy regulator device: %d\n", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) 		platform_device_put(dummy_pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) 		return;
^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) 	ret = platform_driver_register(&dummy_regulator_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) 	if (ret != 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) 		pr_err("Failed to register dummy regulator driver: %d\n", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) 		platform_device_unregister(dummy_pdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) }