Adding upstream version 4.19.249.upstream/4.19.249upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 150 insertions, 0 deletions

diff --git a/drivers/mfd/abx500-core.c b/drivers/mfd/abx500-core.c
new file mode 100644
index 000000000..f282d39a5
--- /dev/null
+++ b/drivers/mfd/abx500-core.c
@@ -0,0 +1,150 @@
+/*
+ * Copyright (C) 2007-2010 ST-Ericsson
+ * License terms: GNU General Public License (GPL) version 2
+ * Register access functions for the ABX500 Mixed Signal IC family.
+ * Author: Mattias Wallin <mattias.wallin@stericsson.com>
+ */
+
+#include <linux/list.h>
+#include <linux/slab.h>
+#include <linux/err.h>
+#include <linux/init.h>
+#include <linux/export.h>
+#include <linux/mfd/abx500.h>
+
+static LIST_HEAD(abx500_list);
+
+struct abx500_device_entry {
+	struct list_head list;
+	struct abx500_ops ops;
+	struct device *dev;
+};
+
+static void lookup_ops(struct device *dev, struct abx500_ops **ops)
+{
+	struct abx500_device_entry *dev_entry;
+
+	*ops = NULL;
+	list_for_each_entry(dev_entry, &abx500_list, list) {
+		if (dev_entry->dev == dev) {
+			*ops = &dev_entry->ops;
+			return;
+		}
+	}
+}
+
+int abx500_register_ops(struct device *dev, struct abx500_ops *ops)
+{
+	struct abx500_device_entry *dev_entry;
+
+	dev_entry = devm_kzalloc(dev, sizeof(*dev_entry), GFP_KERNEL);
+	if (!dev_entry)
+		return -ENOMEM;
+
+	dev_entry->dev = dev;
+	memcpy(&dev_entry->ops, ops, sizeof(*ops));
+
+	list_add_tail(&dev_entry->list, &abx500_list);
+	return 0;
+}
+EXPORT_SYMBOL(abx500_register_ops);
+
+void abx500_remove_ops(struct device *dev)
+{
+	struct abx500_device_entry *dev_entry, *tmp;
+
+	list_for_each_entry_safe(dev_entry, tmp, &abx500_list, list)
+		if (dev_entry->dev == dev)
+			list_del(&dev_entry->list);
+}
+EXPORT_SYMBOL(abx500_remove_ops);
+
+int abx500_set_register_interruptible(struct device *dev, u8 bank, u8 reg,
+	u8 value)
+{
+	struct abx500_ops *ops;
+
+	lookup_ops(dev->parent, &ops);
+	if (ops && ops->set_register)
+		return ops->set_register(dev, bank, reg, value);
+	else
+		return -ENOTSUPP;
+}
+EXPORT_SYMBOL(abx500_set_register_interruptible);
+
+int abx500_get_register_interruptible(struct device *dev, u8 bank, u8 reg,
+	u8 *value)
+{
+	struct abx500_ops *ops;
+
+	lookup_ops(dev->parent, &ops);
+	if (ops && ops->get_register)
+		return ops->get_register(dev, bank, reg, value);
+	else
+		return -ENOTSUPP;
+}
+EXPORT_SYMBOL(abx500_get_register_interruptible);
+
+int abx500_get_register_page_interruptible(struct device *dev, u8 bank,
+	u8 first_reg, u8 *regvals, u8 numregs)
+{
+	struct abx500_ops *ops;
+
+	lookup_ops(dev->parent, &ops);
+	if (ops && ops->get_register_page)
+		return ops->get_register_page(dev, bank,
+			first_reg, regvals, numregs);
+	else
+		return -ENOTSUPP;
+}
+EXPORT_SYMBOL(abx500_get_register_page_interruptible);
+
+int abx500_mask_and_set_register_interruptible(struct device *dev, u8 bank,
+	u8 reg, u8 bitmask, u8 bitvalues)
+{
+	struct abx500_ops *ops;
+
+	lookup_ops(dev->parent, &ops);
+	if (ops && ops->mask_and_set_register)
+		return ops->mask_and_set_register(dev, bank,
+			reg, bitmask, bitvalues);
+	else
+		return -ENOTSUPP;
+}
+EXPORT_SYMBOL(abx500_mask_and_set_register_interruptible);
+
+int abx500_get_chip_id(struct device *dev)
+{
+	struct abx500_ops *ops;
+
+	lookup_ops(dev->parent, &ops);
+	if (ops && ops->get_chip_id)
+		return ops->get_chip_id(dev);
+	else
+		return -ENOTSUPP;
+}
+EXPORT_SYMBOL(abx500_get_chip_id);
+
+int abx500_event_registers_startup_state_get(struct device *dev, u8 *event)
+{
+	struct abx500_ops *ops;
+
+	lookup_ops(dev->parent, &ops);
+	if (ops && ops->event_registers_startup_state_get)
+		return ops->event_registers_startup_state_get(dev, event);
+	else
+		return -ENOTSUPP;
+}
+EXPORT_SYMBOL(abx500_event_registers_startup_state_get);
+
+int abx500_startup_irq_enabled(struct device *dev, unsigned int irq)
+{
+	struct abx500_ops *ops;
+
+	lookup_ops(dev->parent, &ops);
+	if (ops && ops->startup_irq_enabled)
+		return ops->startup_irq_enabled(dev, irq);
+	else
+		return -ENOTSUPP;
+}
+EXPORT_SYMBOL(abx500_startup_irq_enabled);