Initial import

1 files changed, 329 insertions, 0 deletions

diff --git a/drivers/mfd/pcf50633-core.c b/drivers/mfd/pcf50633-core.c
new file mode 100644
index 000000000..6155d123a
--- /dev/null
+++ b/drivers/mfd/pcf50633-core.c
@@ -0,0 +1,329 @@
+/* NXP PCF50633 Power Management Unit (PMU) driver
+ *
+ * (C) 2006-2008 by Openmoko, Inc.
+ * Author: Harald Welte <laforge@openmoko.org>
+ * 	   Balaji Rao <balajirrao@openmoko.org>
+ * All rights reserved.
+ *
+ *  This program is free software; you can redistribute  it and/or modify it
+ *  under  the terms of  the GNU General  Public License as published by the
+ *  Free Software Foundation;  either version 2 of the  License, or (at your
+ *  option) any later version.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/device.h>
+#include <linux/sysfs.h>
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/interrupt.h>
+#include <linux/workqueue.h>
+#include <linux/platform_device.h>
+#include <linux/i2c.h>
+#include <linux/pm.h>
+#include <linux/slab.h>
+#include <linux/regmap.h>
+#include <linux/err.h>
+
+#include <linux/mfd/pcf50633/core.h>
+
+/* Read a block of up to 32 regs  */
+int pcf50633_read_block(struct pcf50633 *pcf, u8 reg,
+					int nr_regs, u8 *data)
+{
+	int ret;
+
+	ret = regmap_raw_read(pcf->regmap, reg, data, nr_regs);
+	if (ret != 0)
+		return ret;
+
+	return nr_regs;
+}
+EXPORT_SYMBOL_GPL(pcf50633_read_block);
+
+/* Write a block of up to 32 regs  */
+int pcf50633_write_block(struct pcf50633 *pcf , u8 reg,
+					int nr_regs, u8 *data)
+{
+	return regmap_raw_write(pcf->regmap, reg, data, nr_regs);
+}
+EXPORT_SYMBOL_GPL(pcf50633_write_block);
+
+u8 pcf50633_reg_read(struct pcf50633 *pcf, u8 reg)
+{
+	unsigned int val;
+	int ret;
+
+	ret = regmap_read(pcf->regmap, reg, &val);
+	if (ret < 0)
+		return -1;
+
+	return val;
+}
+EXPORT_SYMBOL_GPL(pcf50633_reg_read);
+
+int pcf50633_reg_write(struct pcf50633 *pcf, u8 reg, u8 val)
+{
+	return regmap_write(pcf->regmap, reg, val);
+}
+EXPORT_SYMBOL_GPL(pcf50633_reg_write);
+
+int pcf50633_reg_set_bit_mask(struct pcf50633 *pcf, u8 reg, u8 mask, u8 val)
+{
+	return regmap_update_bits(pcf->regmap, reg, mask, val);
+}
+EXPORT_SYMBOL_GPL(pcf50633_reg_set_bit_mask);
+
+int pcf50633_reg_clear_bits(struct pcf50633 *pcf, u8 reg, u8 val)
+{
+	return regmap_update_bits(pcf->regmap, reg, val, 0);
+}
+EXPORT_SYMBOL_GPL(pcf50633_reg_clear_bits);
+
+/* sysfs attributes */
+static ssize_t show_dump_regs(struct device *dev, struct device_attribute *attr,
+			    char *buf)
+{
+	struct pcf50633 *pcf = dev_get_drvdata(dev);
+	u8 dump[16];
+	int n, n1, idx = 0;
+	char *buf1 = buf;
+	static u8 address_no_read[] = { /* must be ascending */
+		PCF50633_REG_INT1,
+		PCF50633_REG_INT2,
+		PCF50633_REG_INT3,
+		PCF50633_REG_INT4,
+		PCF50633_REG_INT5,
+		0 /* terminator */
+	};
+
+	for (n = 0; n < 256; n += sizeof(dump)) {
+		for (n1 = 0; n1 < sizeof(dump); n1++)
+			if (n == address_no_read[idx]) {
+				idx++;
+				dump[n1] = 0x00;
+			} else
+				dump[n1] = pcf50633_reg_read(pcf, n + n1);
+
+		buf1 += sprintf(buf1, "%*ph\n", (int)sizeof(dump), dump);
+	}
+
+	return buf1 - buf;
+}
+static DEVICE_ATTR(dump_regs, 0400, show_dump_regs, NULL);
+
+static ssize_t show_resume_reason(struct device *dev,
+				struct device_attribute *attr, char *buf)
+{
+	struct pcf50633 *pcf = dev_get_drvdata(dev);
+	int n;
+
+	n = sprintf(buf, "%02x%02x%02x%02x%02x\n",
+				pcf->resume_reason[0],
+				pcf->resume_reason[1],
+				pcf->resume_reason[2],
+				pcf->resume_reason[3],
+				pcf->resume_reason[4]);
+
+	return n;
+}
+static DEVICE_ATTR(resume_reason, 0400, show_resume_reason, NULL);
+
+static struct attribute *pcf_sysfs_entries[] = {
+	&dev_attr_dump_regs.attr,
+	&dev_attr_resume_reason.attr,
+	NULL,
+};
+
+static struct attribute_group pcf_attr_group = {
+	.name	= NULL,			/* put in device directory */
+	.attrs	= pcf_sysfs_entries,
+};
+
+static void
+pcf50633_client_dev_register(struct pcf50633 *pcf, const char *name,
+						struct platform_device **pdev)
+{
+	int ret;
+
+	*pdev = platform_device_alloc(name, -1);
+	if (!*pdev) {
+		dev_err(pcf->dev, "Falied to allocate %s\n", name);
+		return;
+	}
+
+	(*pdev)->dev.parent = pcf->dev;
+
+	ret = platform_device_add(*pdev);
+	if (ret) {
+		dev_err(pcf->dev, "Failed to register %s: %d\n", name, ret);
+		platform_device_put(*pdev);
+		*pdev = NULL;
+	}
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int pcf50633_suspend(struct device *dev)
+{
+	struct i2c_client *client = to_i2c_client(dev);
+	struct pcf50633 *pcf = i2c_get_clientdata(client);
+
+	return pcf50633_irq_suspend(pcf);
+}
+
+static int pcf50633_resume(struct device *dev)
+{
+	struct i2c_client *client = to_i2c_client(dev);
+	struct pcf50633 *pcf = i2c_get_clientdata(client);
+
+	return pcf50633_irq_resume(pcf);
+}
+#endif
+
+static SIMPLE_DEV_PM_OPS(pcf50633_pm, pcf50633_suspend, pcf50633_resume);
+
+static const struct regmap_config pcf50633_regmap_config = {
+	.reg_bits = 8,
+	.val_bits = 8,
+};
+
+static int pcf50633_probe(struct i2c_client *client,
+				const struct i2c_device_id *ids)
+{
+	struct pcf50633 *pcf;
+	struct platform_device *pdev;
+	struct pcf50633_platform_data *pdata = dev_get_platdata(&client->dev);
+	int i, j, ret;
+	int version, variant;
+
+	if (!client->irq) {
+		dev_err(&client->dev, "Missing IRQ\n");
+		return -ENOENT;
+	}
+
+	pcf = devm_kzalloc(&client->dev, sizeof(*pcf), GFP_KERNEL);
+	if (!pcf)
+		return -ENOMEM;
+
+	i2c_set_clientdata(client, pcf);
+	pcf->dev = &client->dev;
+	pcf->pdata = pdata;
+
+	mutex_init(&pcf->lock);
+
+	pcf->regmap = devm_regmap_init_i2c(client, &pcf50633_regmap_config);
+	if (IS_ERR(pcf->regmap)) {
+		ret = PTR_ERR(pcf->regmap);
+		dev_err(pcf->dev, "Failed to allocate register map: %d\n", ret);
+		return ret;
+	}
+
+	version = pcf50633_reg_read(pcf, 0);
+	variant = pcf50633_reg_read(pcf, 1);
+	if (version < 0 || variant < 0) {
+		dev_err(pcf->dev, "Unable to probe pcf50633\n");
+		ret = -ENODEV;
+		return ret;
+	}
+
+	dev_info(pcf->dev, "Probed device version %d variant %d\n",
+							version, variant);
+
+	pcf50633_irq_init(pcf, client->irq);
+
+	/* Create sub devices */
+	pcf50633_client_dev_register(pcf, "pcf50633-input", &pcf->input_pdev);
+	pcf50633_client_dev_register(pcf, "pcf50633-rtc", &pcf->rtc_pdev);
+	pcf50633_client_dev_register(pcf, "pcf50633-mbc", &pcf->mbc_pdev);
+	pcf50633_client_dev_register(pcf, "pcf50633-adc", &pcf->adc_pdev);
+	pcf50633_client_dev_register(pcf, "pcf50633-backlight", &pcf->bl_pdev);
+
+
+	for (i = 0; i < PCF50633_NUM_REGULATORS; i++) {
+		pdev = platform_device_alloc("pcf50633-regulator", i);
+		if (!pdev)
+			return -ENOMEM;
+
+		pdev->dev.parent = pcf->dev;
+		ret = platform_device_add_data(pdev, &pdata->reg_init_data[i],
+					       sizeof(pdata->reg_init_data[i]));
+		if (ret)
+			goto err;
+
+		ret = platform_device_add(pdev);
+		if (ret)
+			goto err;
+
+		pcf->regulator_pdev[i] = pdev;
+	}
+
+	ret = sysfs_create_group(&client->dev.kobj, &pcf_attr_group);
+	if (ret)
+		dev_warn(pcf->dev, "error creating sysfs entries\n");
+
+	if (pdata->probe_done)
+		pdata->probe_done(pcf);
+
+	return 0;
+
+err:
+	platform_device_put(pdev);
+	for (j = 0; j < i; j++)
+		platform_device_put(pcf->regulator_pdev[j]);
+
+	return ret;
+}
+
+static int pcf50633_remove(struct i2c_client *client)
+{
+	struct pcf50633 *pcf = i2c_get_clientdata(client);
+	int i;
+
+	sysfs_remove_group(&client->dev.kobj, &pcf_attr_group);
+	pcf50633_irq_free(pcf);
+
+	platform_device_unregister(pcf->input_pdev);
+	platform_device_unregister(pcf->rtc_pdev);
+	platform_device_unregister(pcf->mbc_pdev);
+	platform_device_unregister(pcf->adc_pdev);
+	platform_device_unregister(pcf->bl_pdev);
+
+	for (i = 0; i < PCF50633_NUM_REGULATORS; i++)
+		platform_device_unregister(pcf->regulator_pdev[i]);
+
+	return 0;
+}
+
+static const struct i2c_device_id pcf50633_id_table[] = {
+	{"pcf50633", 0x73},
+	{/* end of list */}
+};
+MODULE_DEVICE_TABLE(i2c, pcf50633_id_table);
+
+static struct i2c_driver pcf50633_driver = {
+	.driver = {
+		.name	= "pcf50633",
+		.pm	= &pcf50633_pm,
+	},
+	.id_table = pcf50633_id_table,
+	.probe = pcf50633_probe,
+	.remove = pcf50633_remove,
+};
+
+static int __init pcf50633_init(void)
+{
+	return i2c_add_driver(&pcf50633_driver);
+}
+
+static void __exit pcf50633_exit(void)
+{
+	i2c_del_driver(&pcf50633_driver);
+}
+
+MODULE_DESCRIPTION("I2C chip driver for NXP PCF50633 PMU");
+MODULE_AUTHOR("Harald Welte <laforge@openmoko.org>");
+MODULE_LICENSE("GPL");
+
+subsys_initcall(pcf50633_init);
+module_exit(pcf50633_exit);