seq_file实例

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#ifndef __REGULATOR_JZ_DEBUG__#define __REGULATOR_JZ_DEBUG__#endif#define INFO_PRINTF(seq, sw, fmt, arg...)\do {\if (seq)\seq_printf(seq, fmt, ##arg);\else if (sw)\printk(KERN_ERR fmt, ##arg);\} while(0)static int _rdev_state_error(struct regulator_dev *rdev){}void regulator_consumer_info(struct seq_file *m, bool sw, struct regulator_dev *rdev, int print_supply){struct regulator *dev = NULL;if(rdev == NULL){INFO_PRINTF(m, sw, "Error:The regulator is NULL!\n");return -1;}//INFO_PRINTF(m, sw, "HELLO WORLD!\n");mutex_lock(&rdev->mutex);/*if(strcmp(rdev_get_name(rdev), "RICOH619_LDO10") == 0){_regulator_disable(rdev, &rdev->supply);}if(strcmp(rdev_get_name(rdev), "RICOH619_LDO3") == 0)         {                 _regulator_disable(rdev, &rdev->supply);         }       if(strcmp(rdev_get_name(rdev), "RICOH619_LDO4") == 0)         {                 _regulator_disable(rdev, &rdev->supply);         }       if(strcmp(rdev_get_name(rdev), "RICOH619_LDO6") == 0)         {                 _regulator_disable(rdev, &rdev->supply);         }       if(strcmp(rdev_get_name(rdev), "RICOH619_LDO9") == 0)         {                 _regulator_disable(rdev, &rdev->supply);         }       if(strcmp(rdev_get_name(rdev), "RICOH619_DC5") == 0)         {                 _regulator_disable(rdev, &rdev->supply);         }*/INFO_PRINTF(m, sw, "%-15s->suspend::%-15suse_count::%-10dis_enabled:%-10dvoltage::%-15d\n", rdev_get_name(rdev), rdev->supply ? rdev_get_name(rdev->supply) : "NULL", rdev->use_count, _regulator_is_enabled(rdev), _regulator_get_voltage(rdev));mutex_unlock(&rdev->mutex);}static int regulator_seq_show(struct seq_file *m, void *p){struct regulator_dev *rdev = list_entry(p, struct regulator_dev, list);regulator_consumer_info(m, 0, rdev, 0);return 0;}static void * regulator_map_seq_start (struct seq_file *m, loff_t *pos) {mutex_lock(&regulator_list_mutex);return seq_list_start( &regulator_list, *pos);}static void *regulator_map_seq_next(struct seq_file *m, void *p, loff_t *pos){return seq_list_next(p, &regulator_list, pos);}static void regulator_map_seq_stop(struct seq_file *m, void *p){mutex_unlock(&regulator_list_mutex);}struct seq_operations regulator_map_seq_ops = {.show = regulator_seq_show,.start = regulator_map_seq_start,.next = regulator_map_seq_next,.stop = regulator_map_seq_stop};static int regulator_seq_open(struct inode *inode, struct file *file){return seq_open(file, &regulator_map_seq_ops);}struct file_operations regulator_map_file_ops = {.owner = THIS_MODULE,.open = regulator_seq_open,.read = seq_read,.llseek = seq_lseek,.release = seq_release};int regulator_core_suspend(void){struct regulator_dev *rdev = NULL;printk(KERN_ERR "%s:\n", __func__);list_for_each_entry(rdev, &regulator_list, list) {regulator_consumer_info(NULL, 1, rdev, 0);}return 0;}struct syscore_ops regulator_core_ops = {.suspend = &regulator_core_suspend,};
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