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