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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 | /* * Broadcom BCM590xx PMU * * Copyright 2014 Linaro Limited * Author: Matt Porter <mporter@linaro.org> * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the * Free Software Foundation; either version 2 of the License, or (at your * option) any later version. */ #include <linux/err.h> #include <linux/i2c.h> #include <linux/init.h> #include <linux/mfd/bcm590xx.h> #include <linux/mfd/core.h> #include <linux/module.h> #include <linux/moduleparam.h> #include <linux/of.h> #include <linux/of_device.h> #include <linux/regmap.h> #include <linux/slab.h> static const struct mfd_cell bcm590xx_devs[] = { { .name = "bcm590xx-vregs", }, }; static const struct regmap_config bcm590xx_regmap_config_pri = { .reg_bits = 8, .val_bits = 8, .max_register = BCM590XX_MAX_REGISTER_PRI, .cache_type = REGCACHE_RBTREE, }; static const struct regmap_config bcm590xx_regmap_config_sec = { .reg_bits = 8, .val_bits = 8, .max_register = BCM590XX_MAX_REGISTER_SEC, .cache_type = REGCACHE_RBTREE, }; static int bcm590xx_i2c_probe(struct i2c_client *i2c_pri, const struct i2c_device_id *id) { struct bcm590xx *bcm590xx; int ret; bcm590xx = devm_kzalloc(&i2c_pri->dev, sizeof(*bcm590xx), GFP_KERNEL); if (!bcm590xx) return -ENOMEM; i2c_set_clientdata(i2c_pri, bcm590xx); bcm590xx->dev = &i2c_pri->dev; bcm590xx->i2c_pri = i2c_pri; bcm590xx->regmap_pri = devm_regmap_init_i2c(i2c_pri, &bcm590xx_regmap_config_pri); if (IS_ERR(bcm590xx->regmap_pri)) { ret = PTR_ERR(bcm590xx->regmap_pri); dev_err(&i2c_pri->dev, "primary regmap init failed: %d\n", ret); return ret; } /* Secondary I2C slave address is the base address with A(2) asserted */ bcm590xx->i2c_sec = i2c_new_dummy(i2c_pri->adapter, i2c_pri->addr | BIT(2)); if (IS_ERR_OR_NULL(bcm590xx->i2c_sec)) { dev_err(&i2c_pri->dev, "failed to add secondary I2C device\n"); return -ENODEV; } i2c_set_clientdata(bcm590xx->i2c_sec, bcm590xx); bcm590xx->regmap_sec = devm_regmap_init_i2c(bcm590xx->i2c_sec, &bcm590xx_regmap_config_sec); if (IS_ERR(bcm590xx->regmap_sec)) { ret = PTR_ERR(bcm590xx->regmap_sec); dev_err(&bcm590xx->i2c_sec->dev, "secondary regmap init failed: %d\n", ret); goto err; } ret = mfd_add_devices(&i2c_pri->dev, -1, bcm590xx_devs, ARRAY_SIZE(bcm590xx_devs), NULL, 0, NULL); if (ret < 0) { dev_err(&i2c_pri->dev, "failed to add sub-devices: %d\n", ret); goto err; } return 0; err: i2c_unregister_device(bcm590xx->i2c_sec); return ret; } static int bcm590xx_i2c_remove(struct i2c_client *i2c) { mfd_remove_devices(&i2c->dev); return 0; } static const struct of_device_id bcm590xx_of_match[] = { { .compatible = "brcm,bcm59056" }, { } }; MODULE_DEVICE_TABLE(of, bcm590xx_of_match); static const struct i2c_device_id bcm590xx_i2c_id[] = { { "bcm59056" }, { } }; MODULE_DEVICE_TABLE(i2c, bcm590xx_i2c_id); static struct i2c_driver bcm590xx_i2c_driver = { .driver = { .name = "bcm590xx", .of_match_table = of_match_ptr(bcm590xx_of_match), }, .probe = bcm590xx_i2c_probe, .remove = bcm590xx_i2c_remove, .id_table = bcm590xx_i2c_id, }; module_i2c_driver(bcm590xx_i2c_driver); MODULE_AUTHOR("Matt Porter <mporter@linaro.org>"); MODULE_DESCRIPTION("BCM590xx multi-function driver"); MODULE_LICENSE("GPL v2"); |