e0f4fec030
Some drivers can detect subsystem failures e.g. shared memory driver can detect modem sub system failures. It would be helpful in analyzing these failures if AB register dump is available at that point. This patch adds the API for the drivers to dump AB registers in the kernel log. Signed-off-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Mian Yousaf Kaukab <mian.yousaf.kaukab@stericsson.com> Reviewed-by: Linus WALLEIJ <linus.walleij@stericsson.com> Reviewed-by: Jonas ABERG <jonas.aberg@stericsson.com>
175 lines
4.3 KiB
C
175 lines
4.3 KiB
C
/*
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* Copyright (C) 2007-2010 ST-Ericsson
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* License terms: GNU General Public License (GPL) version 2
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* Register access functions for the ABX500 Mixed Signal IC family.
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* Author: Mattias Wallin <mattias.wallin@stericsson.com>
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*/
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#include <linux/list.h>
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#include <linux/slab.h>
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#include <linux/err.h>
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#include <linux/module.h>
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#include <linux/mfd/abx500.h>
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static LIST_HEAD(abx500_list);
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struct abx500_device_entry {
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struct list_head list;
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struct abx500_ops ops;
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struct device *dev;
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};
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static void lookup_ops(struct device *dev, struct abx500_ops **ops)
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{
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struct abx500_device_entry *dev_entry;
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*ops = NULL;
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list_for_each_entry(dev_entry, &abx500_list, list) {
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if (dev_entry->dev == dev) {
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*ops = &dev_entry->ops;
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return;
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}
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}
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}
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int abx500_register_ops(struct device *dev, struct abx500_ops *ops)
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{
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struct abx500_device_entry *dev_entry;
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dev_entry = kzalloc(sizeof(struct abx500_device_entry), GFP_KERNEL);
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if (!dev_entry) {
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dev_err(dev, "register_ops kzalloc failed");
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return -ENOMEM;
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}
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dev_entry->dev = dev;
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memcpy(&dev_entry->ops, ops, sizeof(struct abx500_ops));
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list_add_tail(&dev_entry->list, &abx500_list);
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return 0;
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}
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EXPORT_SYMBOL(abx500_register_ops);
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void abx500_remove_ops(struct device *dev)
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{
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struct abx500_device_entry *dev_entry, *tmp;
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list_for_each_entry_safe(dev_entry, tmp, &abx500_list, list)
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{
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if (dev_entry->dev == dev) {
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list_del(&dev_entry->list);
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kfree(dev_entry);
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}
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}
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}
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EXPORT_SYMBOL(abx500_remove_ops);
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int abx500_set_register_interruptible(struct device *dev, u8 bank, u8 reg,
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u8 value)
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{
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struct abx500_ops *ops;
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lookup_ops(dev->parent, &ops);
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if ((ops != NULL) && (ops->set_register != NULL))
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return ops->set_register(dev, bank, reg, value);
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else
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return -ENOTSUPP;
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}
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EXPORT_SYMBOL(abx500_set_register_interruptible);
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int abx500_get_register_interruptible(struct device *dev, u8 bank, u8 reg,
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u8 *value)
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{
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struct abx500_ops *ops;
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lookup_ops(dev->parent, &ops);
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if ((ops != NULL) && (ops->get_register != NULL))
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return ops->get_register(dev, bank, reg, value);
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else
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return -ENOTSUPP;
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}
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EXPORT_SYMBOL(abx500_get_register_interruptible);
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int abx500_get_register_page_interruptible(struct device *dev, u8 bank,
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u8 first_reg, u8 *regvals, u8 numregs)
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{
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struct abx500_ops *ops;
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lookup_ops(dev->parent, &ops);
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if ((ops != NULL) && (ops->get_register_page != NULL))
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return ops->get_register_page(dev, bank,
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first_reg, regvals, numregs);
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else
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return -ENOTSUPP;
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}
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EXPORT_SYMBOL(abx500_get_register_page_interruptible);
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int abx500_mask_and_set_register_interruptible(struct device *dev, u8 bank,
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u8 reg, u8 bitmask, u8 bitvalues)
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{
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struct abx500_ops *ops;
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lookup_ops(dev->parent, &ops);
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if ((ops != NULL) && (ops->mask_and_set_register != NULL))
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return ops->mask_and_set_register(dev, bank,
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reg, bitmask, bitvalues);
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else
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return -ENOTSUPP;
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}
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EXPORT_SYMBOL(abx500_mask_and_set_register_interruptible);
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int abx500_get_chip_id(struct device *dev)
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{
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struct abx500_ops *ops;
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lookup_ops(dev->parent, &ops);
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if ((ops != NULL) && (ops->get_chip_id != NULL))
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return ops->get_chip_id(dev);
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else
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return -ENOTSUPP;
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}
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EXPORT_SYMBOL(abx500_get_chip_id);
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int abx500_event_registers_startup_state_get(struct device *dev, u8 *event)
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{
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struct abx500_ops *ops;
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lookup_ops(dev->parent, &ops);
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if ((ops != NULL) && (ops->event_registers_startup_state_get != NULL))
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return ops->event_registers_startup_state_get(dev, event);
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else
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return -ENOTSUPP;
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}
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EXPORT_SYMBOL(abx500_event_registers_startup_state_get);
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int abx500_startup_irq_enabled(struct device *dev, unsigned int irq)
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{
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struct abx500_ops *ops;
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lookup_ops(dev->parent, &ops);
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if ((ops != NULL) && (ops->startup_irq_enabled != NULL))
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return ops->startup_irq_enabled(dev, irq);
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else
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return -ENOTSUPP;
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}
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EXPORT_SYMBOL(abx500_startup_irq_enabled);
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void abx500_dump_all_banks(void)
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{
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struct abx500_ops *ops;
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struct device dummy_child = {0};
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struct abx500_device_entry *dev_entry;
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list_for_each_entry(dev_entry, &abx500_list, list) {
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dummy_child.parent = dev_entry->dev;
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ops = &dev_entry->ops;
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if ((ops != NULL) && (ops->dump_all_banks != NULL))
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ops->dump_all_banks(&dummy_child);
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}
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}
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EXPORT_SYMBOL(abx500_dump_all_banks);
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MODULE_AUTHOR("Mattias Wallin <mattias.wallin@stericsson.com>");
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MODULE_DESCRIPTION("ABX500 core driver");
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MODULE_LICENSE("GPL");
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