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/of_device.h> 18 #include <linux/regmap.h> 19 #include <linux/slab.h> 20 21 static const struct mfd_cell bcm590xx_devs[] = { 22 { 23 .name = "bcm590xx-vregs", 24 }, 25 }; 26 27 static const struct regmap_config bcm590xx_regmap_config_pri = { 28 .reg_bits = 8, 29 .val_bits = 8, 30 .max_register = BCM590XX_MAX_REGISTER_PRI, 31 .cache_type = REGCACHE_RBTREE, 32 }; 33 34 static const struct regmap_config bcm590xx_regmap_config_sec = { 35 .reg_bits = 8, 36 .val_bits = 8, 37 .max_register = BCM590XX_MAX_REGISTER_SEC, 38 .cache_type = REGCACHE_RBTREE, 39 }; 40 41 static int bcm590xx_i2c_probe(struct i2c_client *i2c_pri) 42 { 43 struct bcm590xx *bcm590xx; 44 int ret; 45 46 bcm590xx = devm_kzalloc(&i2c_pri->dev, sizeof(*bcm590xx), GFP_KERNEL); 47 if (!bcm590xx) 48 return -ENOMEM; 49 50 i2c_set_clientdata(i2c_pri, bcm590xx); 51 bcm590xx->dev = &i2c_pri->dev; 52 bcm590xx->i2c_pri = i2c_pri; 53 54 bcm590xx->regmap_pri = devm_regmap_init_i2c(i2c_pri, 55 &bcm590xx_regmap_config_pri); 56 if (IS_ERR(bcm590xx->regmap_pri)) { 57 ret = PTR_ERR(bcm590xx->regmap_pri); 58 dev_err(&i2c_pri->dev, "primary regmap init failed: %d\n", ret); 59 return ret; 60 } 61 62 /* Secondary I2C slave address is the base address with A(2) asserted */ 63 bcm590xx->i2c_sec = i2c_new_dummy_device(i2c_pri->adapter, 64 i2c_pri->addr | BIT(2)); 65 if (IS_ERR(bcm590xx->i2c_sec)) { 66 dev_err(&i2c_pri->dev, "failed to add secondary I2C device\n"); 67 return PTR_ERR(bcm590xx->i2c_sec); 68 } 69 i2c_set_clientdata(bcm590xx->i2c_sec, bcm590xx); 70 71 bcm590xx->regmap_sec = devm_regmap_init_i2c(bcm590xx->i2c_sec, 72 &bcm590xx_regmap_config_sec); 73 if (IS_ERR(bcm590xx->regmap_sec)) { 74 ret = PTR_ERR(bcm590xx->regmap_sec); 75 dev_err(&bcm590xx->i2c_sec->dev, 76 "secondary regmap init failed: %d\n", ret); 77 goto err; 78 } 79 80 ret = devm_mfd_add_devices(&i2c_pri->dev, -1, bcm590xx_devs, 81 ARRAY_SIZE(bcm590xx_devs), NULL, 0, NULL); 82 if (ret < 0) { 83 dev_err(&i2c_pri->dev, "failed to add sub-devices: %d\n", ret); 84 goto err; 85 } 86 87 return 0; 88 89 err: 90 i2c_unregister_device(bcm590xx->i2c_sec); 91 return ret; 92 } 93 94 static const struct of_device_id bcm590xx_of_match[] = { 95 { .compatible = "brcm,bcm59056" }, 96 { } 97 }; 98 MODULE_DEVICE_TABLE(of, bcm590xx_of_match); 99 100 static const struct i2c_device_id bcm590xx_i2c_id[] = { 101 { "bcm59056" }, 102 { } 103 }; 104 MODULE_DEVICE_TABLE(i2c, bcm590xx_i2c_id); 105 106 static struct i2c_driver bcm590xx_i2c_driver = { 107 .driver = { 108 .name = "bcm590xx", 109 .of_match_table = bcm590xx_of_match, 110 }, 111 .probe_new = bcm590xx_i2c_probe, 112 .id_table = bcm590xx_i2c_id, 113 }; 114 module_i2c_driver(bcm590xx_i2c_driver); 115 116 MODULE_AUTHOR("Matt Porter <mporter@linaro.org>"); 117 MODULE_DESCRIPTION("BCM590xx multi-function driver"); 118 MODULE_LICENSE("GPL v2"); 119