1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Broadcom BCM590xx PMU 4 * 5 * Copyright 2014 Linaro Limited 6 * Author: Matt Porter <mporter@linaro.org> 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> 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 26 static const struct regmap_config bcm590xx_regmap_config_pri = { 27 .reg_bits = 8, 28 .val_bits = 8, 29 .max_register = BCM590XX_MAX_REGISTER_PRI, 30 .cache_type = REGCACHE_RBTREE, 31 }; 32 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 40 static int bcm590xx_i2c_probe(struct i2c_client *i2c_pri) 41 { 42 struct bcm590xx *bcm590xx; 43 int ret; 44 45 bcm590xx = devm_kzalloc(&i2c_pri->dev, sizeof(*bcm590xx), GFP_KERNEL); 46 if (!bcm590xx) 47 return -ENOMEM; 48 49 i2c_set_clientdata(i2c_pri, bcm590xx); 50 bcm590xx->dev = &i2c_pri->dev; 51 bcm590xx->i2c_pri = i2c_pri; 52 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); 58 return ret; 59 } 60 61 /* Secondary I2C slave address is the base address with A(2) asserted */ 62 bcm590xx->i2c_sec = i2c_new_dummy_device(i2c_pri->adapter, 63 i2c_pri->addr | BIT(2)); 64 if (IS_ERR(bcm590xx->i2c_sec)) { 65 dev_err(&i2c_pri->dev, "failed to add secondary I2C device\n"); 66 return PTR_ERR(bcm590xx->i2c_sec); 67 } 68 i2c_set_clientdata(bcm590xx->i2c_sec, bcm590xx); 69 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 79 ret = devm_mfd_add_devices(&i2c_pri->dev, -1, bcm590xx_devs, 80 ARRAY_SIZE(bcm590xx_devs), NULL, 0, NULL); 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); 90 return ret; 91 } 92 93 static const struct of_device_id bcm590xx_of_match[] = { 94 { .compatible = "brcm,bcm59056" }, 95 { } 96 }; 97 MODULE_DEVICE_TABLE(of, bcm590xx_of_match); 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", 108 .of_match_table = bcm590xx_of_match, 109 }, 110 .probe = bcm590xx_i2c_probe, 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"); 118