Thomas Gleixner | 2874c5f | 2019-05-27 08:55:01 +0200 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
Matt Porter | 037b60f2 | 2014-03-11 19:33:54 -0400 | [diff] [blame] | 2 | /* |
| 3 | * Broadcom BCM590xx PMU |
| 4 | * |
| 5 | * Copyright 2014 Linaro Limited |
| 6 | * Author: Matt Porter <mporter@linaro.org> |
Matt Porter | 037b60f2 | 2014-03-11 19:33:54 -0400 | [diff] [blame] | 7 | */ |
| 8 | |
| 9 | #include <linux/err.h> |
| 10 | #include <linux/i2c.h> |
| 11 | #include <linux/init.h> |
| 12 | #include <linux/mfd/bcm590xx.h> |
| 13 | #include <linux/mfd/core.h> |
| 14 | #include <linux/module.h> |
| 15 | #include <linux/moduleparam.h> |
| 16 | #include <linux/of.h> |
Matt Porter | 037b60f2 | 2014-03-11 19:33:54 -0400 | [diff] [blame] | 17 | #include <linux/regmap.h> |
| 18 | #include <linux/slab.h> |
| 19 | |
| 20 | static const struct mfd_cell bcm590xx_devs[] = { |
| 21 | { |
| 22 | .name = "bcm590xx-vregs", |
| 23 | }, |
| 24 | }; |
| 25 | |
Matt Porter | 9e1e726 | 2014-04-23 19:21:31 -0400 | [diff] [blame] | 26 | static const struct regmap_config bcm590xx_regmap_config_pri = { |
Matt Porter | 037b60f2 | 2014-03-11 19:33:54 -0400 | [diff] [blame] | 27 | .reg_bits = 8, |
| 28 | .val_bits = 8, |
Matt Porter | 9e1e726 | 2014-04-23 19:21:31 -0400 | [diff] [blame] | 29 | .max_register = BCM590XX_MAX_REGISTER_PRI, |
Matt Porter | 037b60f2 | 2014-03-11 19:33:54 -0400 | [diff] [blame] | 30 | .cache_type = REGCACHE_RBTREE, |
| 31 | }; |
| 32 | |
Matt Porter | 9e1e726 | 2014-04-23 19:21:31 -0400 | [diff] [blame] | 33 | static const struct regmap_config bcm590xx_regmap_config_sec = { |
| 34 | .reg_bits = 8, |
| 35 | .val_bits = 8, |
| 36 | .max_register = BCM590XX_MAX_REGISTER_SEC, |
| 37 | .cache_type = REGCACHE_RBTREE, |
| 38 | }; |
| 39 | |
Uwe Kleine-König | ace2487 | 2022-11-18 23:42:37 +0100 | [diff] [blame] | 40 | static int bcm590xx_i2c_probe(struct i2c_client *i2c_pri) |
Matt Porter | 037b60f2 | 2014-03-11 19:33:54 -0400 | [diff] [blame] | 41 | { |
| 42 | struct bcm590xx *bcm590xx; |
| 43 | int ret; |
| 44 | |
Matt Porter | 9e1e726 | 2014-04-23 19:21:31 -0400 | [diff] [blame] | 45 | bcm590xx = devm_kzalloc(&i2c_pri->dev, sizeof(*bcm590xx), GFP_KERNEL); |
Matt Porter | 037b60f2 | 2014-03-11 19:33:54 -0400 | [diff] [blame] | 46 | if (!bcm590xx) |
| 47 | return -ENOMEM; |
| 48 | |
Matt Porter | 9e1e726 | 2014-04-23 19:21:31 -0400 | [diff] [blame] | 49 | i2c_set_clientdata(i2c_pri, bcm590xx); |
| 50 | bcm590xx->dev = &i2c_pri->dev; |
| 51 | bcm590xx->i2c_pri = i2c_pri; |
Matt Porter | 037b60f2 | 2014-03-11 19:33:54 -0400 | [diff] [blame] | 52 | |
Matt Porter | 9e1e726 | 2014-04-23 19:21:31 -0400 | [diff] [blame] | 53 | bcm590xx->regmap_pri = devm_regmap_init_i2c(i2c_pri, |
| 54 | &bcm590xx_regmap_config_pri); |
| 55 | if (IS_ERR(bcm590xx->regmap_pri)) { |
| 56 | ret = PTR_ERR(bcm590xx->regmap_pri); |
| 57 | dev_err(&i2c_pri->dev, "primary regmap init failed: %d\n", ret); |
Matt Porter | 037b60f2 | 2014-03-11 19:33:54 -0400 | [diff] [blame] | 58 | return ret; |
| 59 | } |
| 60 | |
Matt Porter | 9e1e726 | 2014-04-23 19:21:31 -0400 | [diff] [blame] | 61 | /* Secondary I2C slave address is the base address with A(2) asserted */ |
Wolfram Sang | 98f0c05 | 2019-07-22 19:26:11 +0200 | [diff] [blame] | 62 | bcm590xx->i2c_sec = i2c_new_dummy_device(i2c_pri->adapter, |
Matt Porter | 9e1e726 | 2014-04-23 19:21:31 -0400 | [diff] [blame] | 63 | i2c_pri->addr | BIT(2)); |
Wolfram Sang | 98f0c05 | 2019-07-22 19:26:11 +0200 | [diff] [blame] | 64 | if (IS_ERR(bcm590xx->i2c_sec)) { |
Matt Porter | 9e1e726 | 2014-04-23 19:21:31 -0400 | [diff] [blame] | 65 | dev_err(&i2c_pri->dev, "failed to add secondary I2C device\n"); |
Wolfram Sang | 98f0c05 | 2019-07-22 19:26:11 +0200 | [diff] [blame] | 66 | return PTR_ERR(bcm590xx->i2c_sec); |
Matt Porter | 9e1e726 | 2014-04-23 19:21:31 -0400 | [diff] [blame] | 67 | } |
| 68 | i2c_set_clientdata(bcm590xx->i2c_sec, bcm590xx); |
Matt Porter | 037b60f2 | 2014-03-11 19:33:54 -0400 | [diff] [blame] | 69 | |
Matt Porter | 9e1e726 | 2014-04-23 19:21:31 -0400 | [diff] [blame] | 70 | bcm590xx->regmap_sec = devm_regmap_init_i2c(bcm590xx->i2c_sec, |
| 71 | &bcm590xx_regmap_config_sec); |
| 72 | if (IS_ERR(bcm590xx->regmap_sec)) { |
| 73 | ret = PTR_ERR(bcm590xx->regmap_sec); |
| 74 | dev_err(&bcm590xx->i2c_sec->dev, |
| 75 | "secondary regmap init failed: %d\n", ret); |
| 76 | goto err; |
| 77 | } |
| 78 | |
Laxman Dewangan | 9148f2c | 2016-04-08 00:13:00 +0530 | [diff] [blame] | 79 | ret = devm_mfd_add_devices(&i2c_pri->dev, -1, bcm590xx_devs, |
| 80 | ARRAY_SIZE(bcm590xx_devs), NULL, 0, NULL); |
Matt Porter | 9e1e726 | 2014-04-23 19:21:31 -0400 | [diff] [blame] | 81 | if (ret < 0) { |
| 82 | dev_err(&i2c_pri->dev, "failed to add sub-devices: %d\n", ret); |
| 83 | goto err; |
| 84 | } |
| 85 | |
| 86 | return 0; |
| 87 | |
| 88 | err: |
| 89 | i2c_unregister_device(bcm590xx->i2c_sec); |
Matt Porter | 037b60f2 | 2014-03-11 19:33:54 -0400 | [diff] [blame] | 90 | return ret; |
| 91 | } |
| 92 | |
| 93 | static const struct of_device_id bcm590xx_of_match[] = { |
| 94 | { .compatible = "brcm,bcm59056" }, |
| 95 | { } |
| 96 | }; |
Axel Lin | 3827c51 | 2014-03-15 09:24:50 +0800 | [diff] [blame] | 97 | MODULE_DEVICE_TABLE(of, bcm590xx_of_match); |
Matt Porter | 037b60f2 | 2014-03-11 19:33:54 -0400 | [diff] [blame] | 98 | |
| 99 | static const struct i2c_device_id bcm590xx_i2c_id[] = { |
| 100 | { "bcm59056" }, |
| 101 | { } |
| 102 | }; |
| 103 | MODULE_DEVICE_TABLE(i2c, bcm590xx_i2c_id); |
| 104 | |
| 105 | static struct i2c_driver bcm590xx_i2c_driver = { |
| 106 | .driver = { |
| 107 | .name = "bcm590xx", |
Krzysztof Kozlowski | b0ad7eb | 2020-11-20 17:21:18 +0100 | [diff] [blame] | 108 | .of_match_table = bcm590xx_of_match, |
Matt Porter | 037b60f2 | 2014-03-11 19:33:54 -0400 | [diff] [blame] | 109 | }, |
Uwe Kleine-König | 9816d85 | 2023-05-15 20:27:52 +0200 | [diff] [blame] | 110 | .probe = bcm590xx_i2c_probe, |
Matt Porter | 037b60f2 | 2014-03-11 19:33:54 -0400 | [diff] [blame] | 111 | .id_table = bcm590xx_i2c_id, |
| 112 | }; |
| 113 | module_i2c_driver(bcm590xx_i2c_driver); |
| 114 | |
| 115 | MODULE_AUTHOR("Matt Porter <mporter@linaro.org>"); |
| 116 | MODULE_DESCRIPTION("BCM590xx multi-function driver"); |
| 117 | MODULE_LICENSE("GPL v2"); |