1 /* 2 * Broadcom BCM590xx PMU 3 * 4 * Copyright 2014 Linaro Limited 5 * Author: Matt Porter <mporter@linaro.org> 6 * 7 * This program is free software; you can redistribute it and/or modify it 8 * under the terms of the GNU General Public License as published by the 9 * Free Software Foundation; either version 2 of the License, or (at your 10 * option) any later version. 11 */ 12 13 #include <linux/err.h> 14 #include <linux/i2c.h> 15 #include <linux/init.h> 16 #include <linux/mfd/bcm590xx.h> 17 #include <linux/mfd/core.h> 18 #include <linux/module.h> 19 #include <linux/moduleparam.h> 20 #include <linux/of.h> 21 #include <linux/of_device.h> 22 #include <linux/regmap.h> 23 #include <linux/slab.h> 24 25 static const struct mfd_cell bcm590xx_devs[] = { 26 { 27 .name = "bcm590xx-vregs", 28 }, 29 }; 30 31 static const struct regmap_config bcm590xx_regmap_config = { 32 .reg_bits = 8, 33 .val_bits = 8, 34 .max_register = BCM590XX_MAX_REGISTER, 35 .cache_type = REGCACHE_RBTREE, 36 }; 37 38 static int bcm590xx_i2c_probe(struct i2c_client *i2c, 39 const struct i2c_device_id *id) 40 { 41 struct bcm590xx *bcm590xx; 42 int ret; 43 44 bcm590xx = devm_kzalloc(&i2c->dev, sizeof(*bcm590xx), GFP_KERNEL); 45 if (!bcm590xx) 46 return -ENOMEM; 47 48 i2c_set_clientdata(i2c, bcm590xx); 49 bcm590xx->dev = &i2c->dev; 50 bcm590xx->i2c_client = i2c; 51 52 bcm590xx->regmap = devm_regmap_init_i2c(i2c, &bcm590xx_regmap_config); 53 if (IS_ERR(bcm590xx->regmap)) { 54 ret = PTR_ERR(bcm590xx->regmap); 55 dev_err(&i2c->dev, "regmap initialization failed: %d\n", ret); 56 return ret; 57 } 58 59 ret = mfd_add_devices(&i2c->dev, -1, bcm590xx_devs, 60 ARRAY_SIZE(bcm590xx_devs), NULL, 0, NULL); 61 if (ret < 0) 62 dev_err(&i2c->dev, "failed to add sub-devices: %d\n", ret); 63 64 return ret; 65 } 66 67 static const struct of_device_id bcm590xx_of_match[] = { 68 { .compatible = "brcm,bcm59056" }, 69 { } 70 }; 71 MODULE_DEVICE_TABLE(of, bcm590xx_of_match); 72 73 static const struct i2c_device_id bcm590xx_i2c_id[] = { 74 { "bcm59056" }, 75 { } 76 }; 77 MODULE_DEVICE_TABLE(i2c, bcm590xx_i2c_id); 78 79 static struct i2c_driver bcm590xx_i2c_driver = { 80 .driver = { 81 .name = "bcm590xx", 82 .owner = THIS_MODULE, 83 .of_match_table = of_match_ptr(bcm590xx_of_match), 84 }, 85 .probe = bcm590xx_i2c_probe, 86 .id_table = bcm590xx_i2c_id, 87 }; 88 module_i2c_driver(bcm590xx_i2c_driver); 89 90 MODULE_AUTHOR("Matt Porter <mporter@linaro.org>"); 91 MODULE_DESCRIPTION("BCM590xx multi-function driver"); 92 MODULE_LICENSE("GPL v2"); 93 MODULE_ALIAS("platform:bcm590xx"); 94