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 const struct i2c_device_id *id) 43 { 44 struct bcm590xx *bcm590xx; 45 int ret; 46 47 bcm590xx = devm_kzalloc(&i2c_pri->dev, sizeof(*bcm590xx), GFP_KERNEL); 48 if (!bcm590xx) 49 return -ENOMEM; 50 51 i2c_set_clientdata(i2c_pri, bcm590xx); 52 bcm590xx->dev = &i2c_pri->dev; 53 bcm590xx->i2c_pri = i2c_pri; 54 55 bcm590xx->regmap_pri = devm_regmap_init_i2c(i2c_pri, 56 &bcm590xx_regmap_config_pri); 57 if (IS_ERR(bcm590xx->regmap_pri)) { 58 ret = PTR_ERR(bcm590xx->regmap_pri); 59 dev_err(&i2c_pri->dev, "primary regmap init failed: %d\n", ret); 60 return ret; 61 } 62 63 /* Secondary I2C slave address is the base address with A(2) asserted */ 64 bcm590xx->i2c_sec = i2c_new_dummy_device(i2c_pri->adapter, 65 i2c_pri->addr | BIT(2)); 66 if (IS_ERR(bcm590xx->i2c_sec)) { 67 dev_err(&i2c_pri->dev, "failed to add secondary I2C device\n"); 68 return PTR_ERR(bcm590xx->i2c_sec); 69 } 70 i2c_set_clientdata(bcm590xx->i2c_sec, bcm590xx); 71 72 bcm590xx->regmap_sec = devm_regmap_init_i2c(bcm590xx->i2c_sec, 73 &bcm590xx_regmap_config_sec); 74 if (IS_ERR(bcm590xx->regmap_sec)) { 75 ret = PTR_ERR(bcm590xx->regmap_sec); 76 dev_err(&bcm590xx->i2c_sec->dev, 77 "secondary regmap init failed: %d\n", ret); 78 goto err; 79 } 80 81 ret = devm_mfd_add_devices(&i2c_pri->dev, -1, bcm590xx_devs, 82 ARRAY_SIZE(bcm590xx_devs), NULL, 0, NULL); 83 if (ret < 0) { 84 dev_err(&i2c_pri->dev, "failed to add sub-devices: %d\n", ret); 85 goto err; 86 } 87 88 return 0; 89 90 err: 91 i2c_unregister_device(bcm590xx->i2c_sec); 92 return ret; 93 } 94 95 static const struct of_device_id bcm590xx_of_match[] = { 96 { .compatible = "brcm,bcm59056" }, 97 { } 98 }; 99 MODULE_DEVICE_TABLE(of, bcm590xx_of_match); 100 101 static const struct i2c_device_id bcm590xx_i2c_id[] = { 102 { "bcm59056" }, 103 { } 104 }; 105 MODULE_DEVICE_TABLE(i2c, bcm590xx_i2c_id); 106 107 static struct i2c_driver bcm590xx_i2c_driver = { 108 .driver = { 109 .name = "bcm590xx", 110 .of_match_table = of_match_ptr(bcm590xx_of_match), 111 }, 112 .probe = bcm590xx_i2c_probe, 113 .id_table = bcm590xx_i2c_id, 114 }; 115 module_i2c_driver(bcm590xx_i2c_driver); 116 117 MODULE_AUTHOR("Matt Porter <mporter@linaro.org>"); 118 MODULE_DESCRIPTION("BCM590xx multi-function driver"); 119 MODULE_LICENSE("GPL v2"); 120