1 /* 2 * Copyright (C) 2007-2010 ST-Ericsson 3 * License terms: GNU General Public License (GPL) version 2 4 * Register access functions for the ABX500 Mixed Signal IC family. 5 * Author: Mattias Wallin <mattias.wallin@stericsson.com> 6 */ 7 8 #include <linux/list.h> 9 #include <linux/slab.h> 10 #include <linux/err.h> 11 #include <linux/module.h> 12 #include <linux/mfd/abx500.h> 13 14 static LIST_HEAD(abx500_list); 15 16 struct abx500_device_entry { 17 struct list_head list; 18 struct abx500_ops ops; 19 struct device *dev; 20 }; 21 22 static void lookup_ops(struct device *dev, struct abx500_ops **ops) 23 { 24 struct abx500_device_entry *dev_entry; 25 26 *ops = NULL; 27 list_for_each_entry(dev_entry, &abx500_list, list) { 28 if (dev_entry->dev == dev) { 29 *ops = &dev_entry->ops; 30 return; 31 } 32 } 33 } 34 35 int abx500_register_ops(struct device *dev, struct abx500_ops *ops) 36 { 37 struct abx500_device_entry *dev_entry; 38 39 dev_entry = devm_kzalloc(dev, 40 sizeof(struct abx500_device_entry), 41 GFP_KERNEL); 42 if (!dev_entry) { 43 dev_err(dev, "register_ops kzalloc failed"); 44 return -ENOMEM; 45 } 46 dev_entry->dev = dev; 47 memcpy(&dev_entry->ops, ops, sizeof(struct abx500_ops)); 48 49 list_add_tail(&dev_entry->list, &abx500_list); 50 return 0; 51 } 52 EXPORT_SYMBOL(abx500_register_ops); 53 54 void abx500_remove_ops(struct device *dev) 55 { 56 struct abx500_device_entry *dev_entry, *tmp; 57 58 list_for_each_entry_safe(dev_entry, tmp, &abx500_list, list) 59 if (dev_entry->dev == dev) 60 list_del(&dev_entry->list); 61 } 62 EXPORT_SYMBOL(abx500_remove_ops); 63 64 int abx500_set_register_interruptible(struct device *dev, u8 bank, u8 reg, 65 u8 value) 66 { 67 struct abx500_ops *ops; 68 69 lookup_ops(dev->parent, &ops); 70 if ((ops != NULL) && (ops->set_register != NULL)) 71 return ops->set_register(dev, bank, reg, value); 72 else 73 return -ENOTSUPP; 74 } 75 EXPORT_SYMBOL(abx500_set_register_interruptible); 76 77 int abx500_get_register_interruptible(struct device *dev, u8 bank, u8 reg, 78 u8 *value) 79 { 80 struct abx500_ops *ops; 81 82 lookup_ops(dev->parent, &ops); 83 if ((ops != NULL) && (ops->get_register != NULL)) 84 return ops->get_register(dev, bank, reg, value); 85 else 86 return -ENOTSUPP; 87 } 88 EXPORT_SYMBOL(abx500_get_register_interruptible); 89 90 int abx500_get_register_page_interruptible(struct device *dev, u8 bank, 91 u8 first_reg, u8 *regvals, u8 numregs) 92 { 93 struct abx500_ops *ops; 94 95 lookup_ops(dev->parent, &ops); 96 if ((ops != NULL) && (ops->get_register_page != NULL)) 97 return ops->get_register_page(dev, bank, 98 first_reg, regvals, numregs); 99 else 100 return -ENOTSUPP; 101 } 102 EXPORT_SYMBOL(abx500_get_register_page_interruptible); 103 104 int abx500_mask_and_set_register_interruptible(struct device *dev, u8 bank, 105 u8 reg, u8 bitmask, u8 bitvalues) 106 { 107 struct abx500_ops *ops; 108 109 lookup_ops(dev->parent, &ops); 110 if ((ops != NULL) && (ops->mask_and_set_register != NULL)) 111 return ops->mask_and_set_register(dev, bank, 112 reg, bitmask, bitvalues); 113 else 114 return -ENOTSUPP; 115 } 116 EXPORT_SYMBOL(abx500_mask_and_set_register_interruptible); 117 118 int abx500_get_chip_id(struct device *dev) 119 { 120 struct abx500_ops *ops; 121 122 lookup_ops(dev->parent, &ops); 123 if ((ops != NULL) && (ops->get_chip_id != NULL)) 124 return ops->get_chip_id(dev); 125 else 126 return -ENOTSUPP; 127 } 128 EXPORT_SYMBOL(abx500_get_chip_id); 129 130 int abx500_event_registers_startup_state_get(struct device *dev, u8 *event) 131 { 132 struct abx500_ops *ops; 133 134 lookup_ops(dev->parent, &ops); 135 if ((ops != NULL) && (ops->event_registers_startup_state_get != NULL)) 136 return ops->event_registers_startup_state_get(dev, event); 137 else 138 return -ENOTSUPP; 139 } 140 EXPORT_SYMBOL(abx500_event_registers_startup_state_get); 141 142 int abx500_startup_irq_enabled(struct device *dev, unsigned int irq) 143 { 144 struct abx500_ops *ops; 145 146 lookup_ops(dev->parent, &ops); 147 if ((ops != NULL) && (ops->startup_irq_enabled != NULL)) 148 return ops->startup_irq_enabled(dev, irq); 149 else 150 return -ENOTSUPP; 151 } 152 EXPORT_SYMBOL(abx500_startup_irq_enabled); 153 154 MODULE_AUTHOR("Mattias Wallin <mattias.wallin@stericsson.com>"); 155 MODULE_DESCRIPTION("ABX500 core driver"); 156 MODULE_LICENSE("GPL"); 157