Subject: pcf50606_rebase_changes,patch

X-Git-Url: http://git.openmoko.org/?p=kernel.git;a=commitdiff_plain;h=938eddf17625cce0307f7612a3ea2560384e2384

pcf50606_rebase_changes,patch

This patch brings into andy-tracking all changes related to pcf50606 from old
balaji-tracking.

3 files changed, 1084 insertions, 0 deletions

diff --git a/drivers/mfd/pcf50606-adc.c b/drivers/mfd/pcf50606-adc.c
new file mode 100644
index 00000000000..fe0336b9753
--- /dev/null
+++ b/drivers/mfd/pcf50606-adc.c
@@ -0,0 +1,279 @@
+/* Philips PCF50606 ADC Driver
+ *
+ * (C) 2006-2008 by Openmoko, Inc.
+ * Author: Balaji Rao <balajirrao@openmoko.org>
+ * All rights reserved.
+ *
+ * Broken down from monstrous PCF50606 driver mainly by
+ * Harald Welte, Andy Green, Werner Almesberger and Matt Hsu
+ *
+ *  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.
+ *
+ *  NOTE: This driver does not yet support subtractive ADC mode, which means
+ *  you can do only one measurement per read request.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/device.h>
+#include <linux/platform_device.h>
+#include <linux/completion.h>
+
+#include <linux/mfd/pcf50606/core.h>
+#include <linux/mfd/pcf50606/adc.h>
+
+struct pcf50606_adc_request {
+	int mux;
+	int result;
+	void (*callback)(struct pcf50606 *, void *, int);
+	void *callback_param;
+
+	/* Used in case of sync requests */
+	struct completion completion;
+
+};
+
+#define PCF50606_MAX_ADC_FIFO_DEPTH 8
+
+struct pcf50606_adc {
+	struct pcf50606 *pcf;
+
+	/* Private stuff */
+	struct pcf50606_adc_request *queue[PCF50606_MAX_ADC_FIFO_DEPTH];
+	int queue_head;
+	int queue_tail;
+	struct mutex queue_mutex;
+};
+
+static inline struct pcf50606_adc *__to_adc(struct pcf50606 *pcf)
+{
+	return platform_get_drvdata(pcf->adc_pdev);
+}
+
+static void adc_setup(struct pcf50606 *pcf, int channel)
+{
+	channel &= PCF50606_ADCC2_ADCMUX_MASK;
+
+	/* start ADC conversion of selected channel */
+	pcf50606_reg_write(pcf, PCF50606_REG_ADCC2, channel |
+		    PCF50606_ADCC2_ADCSTART | PCF50606_ADCC2_RES_10BIT);
+
+}
+
+static void trigger_next_adc_job_if_any(struct pcf50606 *pcf)
+{
+	struct pcf50606_adc *adc = __to_adc(pcf);
+	int head, tail;
+
+	mutex_lock(&adc->queue_mutex);
+
+	head = adc->queue_head;
+	tail = adc->queue_tail;
+
+	if (!adc->queue[head])
+		goto out;
+
+	adc_setup(pcf, adc->queue[head]->mux);
+out:
+	mutex_unlock(&adc->queue_mutex);
+}
+
+static int
+adc_enqueue_request(struct pcf50606 *pcf, struct pcf50606_adc_request *req)
+{
+	struct pcf50606_adc *adc = __to_adc(pcf);
+	int head, tail;
+
+	mutex_lock(&adc->queue_mutex);
+	head = adc->queue_head;
+	tail = adc->queue_tail;
+
+	if (adc->queue[tail]) {
+		mutex_unlock(&adc->queue_mutex);
+		return -EBUSY;
+	}
+
+	adc->queue[tail] = req;
+
+	adc->queue_tail =
+		(tail + 1) & (PCF50606_MAX_ADC_FIFO_DEPTH - 1);
+
+	mutex_unlock(&adc->queue_mutex);
+
+	trigger_next_adc_job_if_any(pcf);
+
+	return 0;
+}
+
+static void
+pcf50606_adc_sync_read_callback(struct pcf50606 *pcf, void *param, int result)
+{
+	struct pcf50606_adc_request *req;
+
+	/*We know here that the passed param is an adc_request object */
+	req = (struct pcf50606_adc_request *)param;
+
+	req->result = result;
+	complete(&req->completion);
+}
+
+int pcf50606_adc_sync_read(struct pcf50606 *pcf, int mux)
+{
+
+	struct pcf50606_adc_request *req;
+	int result;
+
+	/* req is freed when the result is ready, in irq handler*/
+	req = kzalloc(sizeof(*req), GFP_KERNEL);
+	if (!req)
+		return -ENOMEM;
+
+	req->mux = mux;
+	req->callback =  pcf50606_adc_sync_read_callback;
+	req->callback_param = req;
+	init_completion(&req->completion);
+
+	adc_enqueue_request(pcf, req);
+
+	if (wait_for_completion_timeout(&req->completion, 5 * HZ) == 5 * HZ) {
+		dev_err(pcf->dev, "ADC read timed out \n");
+	}
+
+	result = req->result;
+
+	return result;
+}
+EXPORT_SYMBOL_GPL(pcf50606_adc_sync_read);
+
+int pcf50606_adc_async_read(struct pcf50606 *pcf, int mux,
+			     void (*callback)(struct pcf50606 *, void *, int),
+			     void *callback_param)
+{
+	struct pcf50606_adc_request *req;
+
+	/* req is freed when the result is ready, in pcf50606_work*/
+	req = kmalloc(sizeof(*req), GFP_KERNEL);
+	if (!req)
+		return -ENOMEM;
+
+	req->mux = mux;
+	req->callback = callback;
+	req->callback_param = callback_param;
+
+	adc_enqueue_request(pcf, req);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(pcf50606_adc_async_read);
+
+static int adc_result(struct pcf50606 *pcf)
+{
+	u16 ret = (pcf50606_reg_read(pcf, PCF50606_REG_ADCS1) << 2) |
+			(pcf50606_reg_read(pcf, PCF50606_REG_ADCS2) & 0x03);
+
+	dev_info(pcf->dev, "adc result = %d\n", ret);
+
+	return ret;
+}
+
+static void pcf50606_adc_irq(int irq, void *data)
+{
+	struct pcf50606_adc *adc = data;
+	struct pcf50606 *pcf = adc->pcf;
+	struct pcf50606_adc_request *req;
+	int head;
+
+	mutex_lock(&adc->queue_mutex);
+	head = adc->queue_head;
+
+	req = adc->queue[head];
+	if (WARN_ON(!req)) {
+		dev_err(pcf->dev, "pcf50606-adc irq: ADC queue empty!\n");
+		mutex_unlock(&adc->queue_mutex);
+		return;
+	}
+
+	adc->queue[head] = NULL;
+	adc->queue_head = (head + 1) &
+				      (PCF50606_MAX_ADC_FIFO_DEPTH - 1);
+
+	mutex_unlock(&adc->queue_mutex);
+
+	req->callback(pcf, req->callback_param, adc_result(pcf));
+	kfree(req);
+
+	trigger_next_adc_job_if_any(pcf);
+}
+
+static int __devinit pcf50606_adc_probe(struct platform_device *pdev)
+{
+	struct pcf50606_subdev_pdata *pdata = pdev->dev.platform_data;
+	struct pcf50606_adc *adc;
+
+	adc = kzalloc(sizeof(*adc), GFP_KERNEL);
+	if (!adc)
+		return -ENOMEM;
+
+	adc->pcf = pdata->pcf;
+	platform_set_drvdata(pdev, adc);
+
+	pcf50606_register_irq(pdata->pcf, PCF50606_IRQ_ADCRDY,
+					pcf50606_adc_irq, adc);
+
+	mutex_init(&adc->queue_mutex);
+
+	return 0;
+}
+
+static int __devexit pcf50606_adc_remove(struct platform_device *pdev)
+{
+	struct pcf50606_adc *adc = platform_get_drvdata(pdev);
+	int i, head;
+
+	pcf50606_free_irq(adc->pcf, PCF50606_IRQ_ADCRDY);
+
+	mutex_lock(&adc->queue_mutex);
+	head = adc->queue_head;
+
+	if (WARN_ON(adc->queue[head]))
+		dev_err(adc->pcf->dev,
+			"adc driver removed with request pending\n");
+
+	for (i = 0; i < PCF50606_MAX_ADC_FIFO_DEPTH; i++)
+		kfree(adc->queue[i]);
+
+	mutex_unlock(&adc->queue_mutex);
+	kfree(adc);
+
+	return 0;
+}
+
+struct platform_driver pcf50606_adc_driver = {
+	.driver = {
+		.name = "pcf50606-adc",
+	},
+	.probe = pcf50606_adc_probe,
+	.remove = __devexit_p(pcf50606_adc_remove),
+};
+
+static int __init pcf50606_adc_init(void)
+{
+		return platform_driver_register(&pcf50606_adc_driver);
+}
+module_init(pcf50606_adc_init);
+
+static void __exit pcf50606_adc_exit(void)
+{
+		platform_driver_unregister(&pcf50606_adc_driver);
+}
+module_exit(pcf50606_adc_exit);
+
+MODULE_AUTHOR("Balaji Rao <balajirrao@openmoko.org>");
+MODULE_DESCRIPTION("PCF50606 adc driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:pcf50606-adc");
+
diff --git a/drivers/mfd/pcf50606-core.c b/drivers/mfd/pcf50606-core.c
new file mode 100644
index 00000000000..994d6f406c2
--- /dev/null
+++ b/drivers/mfd/pcf50606-core.c
@@ -0,0 +1,686 @@
+/* Philips PCF50606 Power Management Unit (PMU) driver
+ *
+ * (C) 2006-2008 by Openmoko, Inc.
+ * Author: Harald Welte <laforge@openmoko.org>
+ *	    Matt Hsu <matt@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/device.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/irq.h>
+#include <linux/device.h>
+#include <linux/module.h>
+
+#include <linux/mfd/pcf50606/core.h>
+
+static int __pcf50606_read(struct pcf50606 *pcf, u8 reg, int num, u8 *data)
+{
+	int ret;
+
+	ret = i2c_smbus_read_i2c_block_data(pcf->i2c_client, reg,
+				num, data);
+	if (ret < 0)
+		dev_err(pcf->dev, "Error reading %d regs at %d\n", num, reg);
+
+	return ret;
+}
+
+static int __pcf50606_write(struct pcf50606 *pcf, u8 reg, int num, u8 *data)
+{
+	int ret;
+
+	ret = i2c_smbus_write_i2c_block_data(pcf->i2c_client, reg,
+				num, data);
+	if (ret < 0)
+		dev_err(pcf->dev, "Error writing %d regs at %d\n", num, reg);
+
+	return ret;
+
+}
+
+/* Read a block of upto 32 regs  */
+int pcf50606_read_block(struct pcf50606 *pcf, u8 reg,
+					int nr_regs, u8 *data)
+{
+	int ret;
+
+	mutex_lock(&pcf->lock);
+	ret = __pcf50606_read(pcf, reg, nr_regs, data);
+	mutex_unlock(&pcf->lock);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(pcf50606_read_block);
+
+/* Write a block of upto 32 regs  */
+int pcf50606_write_block(struct pcf50606 *pcf , u8 reg,
+					int nr_regs, u8 *data)
+{
+	int ret;
+
+	mutex_lock(&pcf->lock);
+	ret = __pcf50606_write(pcf, reg, nr_regs, data);
+	mutex_unlock(&pcf->lock);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(pcf50606_write_block);
+
+u8 pcf50606_reg_read(struct pcf50606 *pcf, u8 reg)
+{
+	u8 val;
+
+	mutex_lock(&pcf->lock);
+	__pcf50606_read(pcf, reg, 1, &val);
+	mutex_unlock(&pcf->lock);
+
+	return val;
+}
+EXPORT_SYMBOL_GPL(pcf50606_reg_read);
+
+int pcf50606_reg_write(struct pcf50606 *pcf, u8 reg, u8 val)
+{
+	int ret;
+
+	mutex_lock(&pcf->lock);
+	ret = __pcf50606_write(pcf, reg, 1, &val);
+	mutex_unlock(&pcf->lock);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(pcf50606_reg_write);
+
+int pcf50606_reg_set_bit_mask(struct pcf50606 *pcf, u8 reg, u8 mask, u8 val)
+{
+	int ret;
+	u8 tmp;
+
+	val &= mask;
+
+	mutex_lock(&pcf->lock);
+	ret = __pcf50606_read(pcf, reg, 1, &tmp);
+	if (ret < 0)
+		goto out;
+
+	tmp &= ~mask;
+	tmp |= val;
+	ret = __pcf50606_write(pcf, reg, 1, &tmp);
+
+out:
+	mutex_unlock(&pcf->lock);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(pcf50606_reg_set_bit_mask);
+
+int pcf50606_reg_clear_bits(struct pcf50606 *pcf, u8 reg, u8 val)
+{
+	int ret;
+	u8 tmp;
+
+	mutex_lock(&pcf->lock);
+	ret = __pcf50606_read(pcf, reg, 1, &tmp);
+	if (ret < 0)
+		goto out;
+
+	tmp &= ~val;
+	ret = __pcf50606_write(pcf, reg, 1, &tmp);
+
+out:
+	mutex_unlock(&pcf->lock);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(pcf50606_reg_clear_bits);
+
+/* sysfs attributes */
+static ssize_t show_dump_regs(struct device *dev, struct device_attribute *attr,
+			    char *buf)
+{
+	struct pcf50606 *pcf = dev_get_drvdata(dev);
+	u8 dump[16];
+	int n, n1, idx = 0;
+	char *buf1 = buf;
+	static u8 address_no_read[] = { /* must be ascending */
+		PCF50606_REG_INT1,
+		PCF50606_REG_INT2,
+		PCF50606_REG_INT3,
+		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] = pcf50606_reg_read(pcf, n + n1);
+
+		hex_dump_to_buffer(dump, sizeof(dump), 16, 1, buf1, 128, 0);
+		buf1 += strlen(buf1);
+		*buf1++ = '\n';
+		*buf1 = '\0';
+	}
+
+	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 pcf50606 *pcf = dev_get_drvdata(dev);
+	int n;
+
+	n = sprintf(buf, "%02x%02x%02x\n",
+				pcf->resume_reason[0],
+				pcf->resume_reason[1],
+				pcf->resume_reason[2]);
+
+	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,
+};
+
+int pcf50606_register_irq(struct pcf50606 *pcf, int irq,
+			void (*handler) (int, void *), void *data)
+{
+	if (irq < 0 || irq > PCF50606_NUM_IRQ || !handler)
+		return -EINVAL;
+
+	if (WARN_ON(pcf->irq_handler[irq].handler))
+		return -EBUSY;
+
+	mutex_lock(&pcf->lock);
+	pcf->irq_handler[irq].handler = handler;
+	pcf->irq_handler[irq].data = data;
+	mutex_unlock(&pcf->lock);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(pcf50606_register_irq);
+
+int pcf50606_free_irq(struct pcf50606 *pcf, int irq)
+{
+	if (irq < 0 || irq > PCF50606_NUM_IRQ)
+		return -EINVAL;
+
+	mutex_lock(&pcf->lock);
+	pcf->irq_handler[irq].handler = NULL;
+	mutex_unlock(&pcf->lock);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(pcf50606_free_irq);
+
+static int __pcf50606_irq_mask_set(struct pcf50606 *pcf, int irq, u8 mask)
+{
+	u8 reg, bits, tmp;
+	int ret = 0, idx;
+
+	idx = irq >> 3;
+	reg =  PCF50606_REG_INT1M + idx;
+	bits = 1 << (irq & 0x07);
+
+	mutex_lock(&pcf->lock);
+
+	if (mask) {
+		ret = __pcf50606_read(pcf, reg, 1, &tmp);
+		if (ret < 0)
+			goto out;
+
+		tmp |= bits;
+
+		ret = __pcf50606_write(pcf, reg, 1, &tmp);
+		if (ret < 0)
+			goto out;
+
+		pcf->mask_regs[idx] &= ~bits;
+		pcf->mask_regs[idx] |= bits;
+	} else {
+		ret = __pcf50606_read(pcf, reg, 1, &tmp);
+		if (ret < 0)
+			goto out;
+
+		tmp &= ~bits;
+
+		ret = __pcf50606_write(pcf, reg, 1, &tmp);
+		if (ret < 0)
+			goto out;
+
+		pcf->mask_regs[idx] &= ~bits;
+	}
+out:
+	mutex_unlock(&pcf->lock);
+
+	return ret;
+}
+
+int pcf50606_irq_mask(struct pcf50606 *pcf, int irq)
+{
+	dev_info(pcf->dev, "Masking IRQ %d\n", irq);
+
+	return __pcf50606_irq_mask_set(pcf, irq, 1);
+}
+EXPORT_SYMBOL_GPL(pcf50606_irq_mask);
+
+int pcf50606_irq_unmask(struct pcf50606 *pcf, int irq)
+{
+	dev_info(pcf->dev, "Unmasking IRQ %d\n", irq);
+
+	return __pcf50606_irq_mask_set(pcf, irq, 0);
+}
+EXPORT_SYMBOL_GPL(pcf50606_irq_unmask);
+
+int pcf50606_irq_mask_get(struct pcf50606 *pcf, int irq)
+{
+	u8 reg, bits;
+
+	reg =  (irq / 8);
+	bits = (1 << (irq % 8));
+
+	return pcf->mask_regs[reg] & bits;
+}
+EXPORT_SYMBOL_GPL(pcf50606_irq_mask_get);
+
+static void pcf50606_irq_call_handler(struct pcf50606 *pcf,
+					int irq)
+{
+	if (pcf->irq_handler[irq].handler)
+		pcf->irq_handler[irq].handler(irq, pcf->irq_handler[irq].data);
+}
+
+#define PCF50606_ONKEY1S_TIMEOUT 	8
+
+#define PCF50606_REG_MBCS1		0x2c
+
+static void pcf50606_irq_worker(struct work_struct *work)
+{
+	struct pcf50606 *pcf;
+	int ret, i, j;
+	u8 pcf_int[3], chgstat;
+
+	pcf = container_of(work, struct pcf50606, irq_work);
+
+	/* Read the 3 INT regs in one transaction */
+	ret = pcf50606_read_block(pcf, PCF50606_REG_INT1,
+						ARRAY_SIZE(pcf_int), pcf_int);
+	if (ret != ARRAY_SIZE(pcf_int)) {
+		dev_info(pcf->dev, "Error reading INT registers\n");
+		
+		/*
+		 * If this doesn't ACK the interrupt to the chip, we'll be
+		 * called once again as we're level triggered.
+		 */
+		goto out;
+	}
+
+	/* We immediately read the charger status. We thus make sure
+	 * only of CHGINS/CHGRM interrupt handlers are called */
+	if (pcf_int[1] & (PCF50606_INT2_CHGINS | PCF50606_INT2_CHGRM)) {
+		chgstat = pcf50606_reg_read(pcf, PCF50606_REG_MBCS1);
+		if (chgstat & (0x1 << 4))
+			pcf_int[1] &= ~(1 << PCF50606_INT2_CHGRM);
+		else
+			pcf_int[1] &= ~(1 << PCF50606_INT2_CHGINS);
+	}
+	
+	dev_info(pcf->dev, "INT1=0x%02x INT2=0x%02x INT3=0x%02x\n",
+				pcf_int[0], pcf_int[1], pcf_int[2]);
+
+	/* Some revisions of the chip don't have a 8s standby mode on
+	 * ONKEY1S press. We try to manually do it in such cases. */
+	if (pcf_int[0] & PCF50606_INT1_SECOND && pcf->onkey1s_held) {
+		dev_info(pcf->dev, "ONKEY1S held for %d secs\n",
+							pcf->onkey1s_held);
+		if (pcf->onkey1s_held++ == PCF50606_ONKEY1S_TIMEOUT)
+			if (pcf->pdata->force_shutdown)
+				pcf->pdata->force_shutdown(pcf);
+	}
+
+	if (pcf_int[0] & PCF50606_INT1_ONKEY1S) {
+		dev_info(pcf->dev, "ONKEY1S held\n");
+		pcf->onkey1s_held = 1 ;
+
+		/* Unmask IRQ_SECOND */
+		pcf50606_reg_clear_bits(pcf, PCF50606_REG_INT1M,
+						PCF50606_INT1_SECOND);
+
+		/* Unmask IRQ_ONKEYF */
+		pcf50606_reg_clear_bits(pcf, PCF50606_REG_INT1M,
+						PCF50606_INT1_ONKEYF);
+	}
+
+	if ((pcf_int[0] & PCF50606_INT1_ONKEYR) && pcf->onkey1s_held) {
+		pcf->onkey1s_held = 0;
+
+		/* Mask SECOND and ONKEYF interrupts */
+		if (pcf->mask_regs[0] & PCF50606_INT1_SECOND)
+			pcf50606_reg_set_bit_mask(pcf,
+					PCF50606_REG_INT1M,
+					PCF50606_INT1_SECOND,
+					PCF50606_INT1_SECOND);
+
+		if (pcf->mask_regs[0] & PCF50606_INT1_ONKEYF)
+			pcf50606_reg_set_bit_mask(pcf,
+					PCF50606_REG_INT1M,
+					PCF50606_INT1_ONKEYF,
+					PCF50606_INT1_ONKEYF);
+	}
+
+	/* Have we just resumed ? */
+	if (pcf->is_suspended) {
+
+		pcf->is_suspended = 0;
+
+		/* Set the resume reason filtering out non resumers */
+		for (i = 0; i < ARRAY_SIZE(pcf_int); i++)
+			pcf->resume_reason[i] = pcf_int[i] &
+						pcf->pdata->resumers[i];
+
+		/* Make sure we don't pass on ONKEY events to
+		 * userspace now */
+		pcf_int[1] &= ~(PCF50606_INT1_ONKEYR | PCF50606_INT1_ONKEYF);
+	}
+
+	for (i = 0; i < ARRAY_SIZE(pcf_int); i++) {
+		/* Unset masked interrupts */
+		pcf_int[i] &= ~pcf->mask_regs[i];
+
+		for (j = 0; j < 8 ; j++)
+			if (pcf_int[i] & (1 << j))
+				pcf50606_irq_call_handler(pcf, (i * 8) + j);
+	}
+
+out:
+	put_device(pcf->dev);
+	enable_irq(pcf->irq);
+}
+
+static irqreturn_t pcf50606_irq(int irq, void *data)
+{
+	struct pcf50606 *pcf = data;
+
+	get_device(pcf->dev);
+	disable_irq(pcf->irq);
+	schedule_work(&pcf->irq_work);
+
+	return IRQ_HANDLED;
+}
+
+static void
+pcf50606_client_dev_register(struct pcf50606 *pcf, const char *name,
+						struct platform_device **pdev)
+{
+	struct pcf50606_subdev_pdata *subdev_pdata;
+	int ret;
+
+	*pdev = platform_device_alloc(name, -1);
+	if (!*pdev) {
+		dev_err(pcf->dev, "Falied to allocate %s\n", name);
+		return;
+	}
+
+	subdev_pdata = kmalloc(sizeof(*subdev_pdata), GFP_KERNEL);
+	if (!subdev_pdata) {
+		dev_err(pcf->dev, "Error allocating subdev pdata\n");
+		platform_device_put(*pdev);
+	}
+
+	subdev_pdata->pcf = pcf;
+	platform_device_add_data(*pdev, subdev_pdata, sizeof(*subdev_pdata));
+
+	(*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
+static int pcf50606_suspend(struct device *dev, pm_message_t state)
+{
+	struct pcf50606 *pcf;
+	int ret, i;
+	u8 res[3];
+
+	pcf = dev_get_drvdata(dev);
+
+	/* Make sure our interrupt handlers are not called
+	 * henceforth */
+	disable_irq(pcf->irq);
+
+	/* Make sure that any running IRQ worker has quit */
+	cancel_work_sync(&pcf->irq_work);
+
+	/* Save the masks */
+	ret = pcf50606_read_block(pcf, PCF50606_REG_INT1M,
+				ARRAY_SIZE(pcf->suspend_irq_masks),
+						pcf->suspend_irq_masks);
+	if (ret < 0) {
+		dev_err(pcf->dev, "error saving irq masks\n");
+		goto out;
+	}
+	
+	/* Write wakeup irq masks */
+	for (i = 0; i < ARRAY_SIZE(res); i++)
+		res[i] = ~pcf->pdata->resumers[i];
+
+	ret = pcf50606_write_block(pcf, PCF50606_REG_INT1M,
+					ARRAY_SIZE(res), &res[0]);
+	if (ret < 0) {
+		dev_err(pcf->dev, "error writing wakeup irq masks\n");
+		goto out;
+	}
+
+	pcf->is_suspended = 1;
+
+out:
+	return ret;
+}
+
+static int pcf50606_resume(struct device *dev)
+{
+	struct pcf50606 *pcf;
+	int ret;
+
+	pcf = dev_get_drvdata(dev);
+
+	/* Write the saved mask registers */
+	ret = pcf50606_write_block(pcf, PCF50606_REG_INT1M,
+				ARRAY_SIZE(pcf->suspend_irq_masks),
+					pcf->suspend_irq_masks);
+	if (ret < 0)
+		dev_err(pcf->dev, "Error restoring saved suspend masks\n");
+
+	get_device(pcf->dev);
+
+	/*
+	 * Clear any pending interrupts and set resume reason if any.
+	 * This will leave with enable_irq()
+	 */
+	pcf50606_irq_worker(&pcf->irq_work);
+
+	return 0;
+}
+#else
+#define pcf50606_suspend NULL
+#define pcf50606_resume NULL
+#endif
+
+static int pcf50606_probe(struct i2c_client *client,
+				const struct i2c_device_id *ids)
+{
+	struct pcf50606 *pcf;
+	struct pcf50606_platform_data *pdata = client->dev.platform_data;
+	int i, ret = 0;
+	int version, variant;
+
+	pcf = kzalloc(sizeof(*pcf), GFP_KERNEL);
+	if (!pcf)
+		return -ENOMEM;
+
+	pcf->pdata = pdata;
+
+	mutex_init(&pcf->lock);
+
+	i2c_set_clientdata(client, pcf);
+	pcf->dev = &client->dev;
+	pcf->i2c_client = client;
+	pcf->irq = client->irq;
+
+	INIT_WORK(&pcf->irq_work, pcf50606_irq_worker);
+
+	version = pcf50606_reg_read(pcf, 0);
+	variant = pcf50606_reg_read(pcf, 1);
+	if (version < 0 || variant < 0) {
+		dev_err(pcf->dev, "Unable to probe pcf50606\n");
+		ret = -ENODEV;
+		goto err;
+	}
+
+	dev_info(pcf->dev, "Probed device version %d variant %d\n",
+							version, variant);
+	/* Enable all inteerupts except RTC SECOND */
+	pcf->mask_regs[0] = 0x40;
+	pcf50606_reg_write(pcf, PCF50606_REG_INT1M, pcf->mask_regs[0]);
+	pcf50606_reg_write(pcf, PCF50606_REG_INT2M, 0x00);
+	pcf50606_reg_write(pcf, PCF50606_REG_INT3M, 0x00);
+
+	pcf50606_client_dev_register(pcf, "pcf50606-input",
+						&pcf->input_pdev);
+	pcf50606_client_dev_register(pcf, "pcf50606-rtc",
+						&pcf->rtc_pdev);
+	pcf50606_client_dev_register(pcf, "pcf50606-mbc",
+						&pcf->mbc_pdev);
+	pcf50606_client_dev_register(pcf, "pcf50606-adc",
+						&pcf->adc_pdev);
+	pcf50606_client_dev_register(pcf, "pcf50606-wdt",
+						&pcf->wdt_pdev);
+	for (i = 0; i < PCF50606_NUM_REGULATORS; i++) {
+		struct platform_device *pdev;
+
+		pdev = platform_device_alloc("pcf50606-regltr", i);
+		if (!pdev) {
+			dev_err(pcf->dev, "Cannot create regulator\n");
+			continue;
+		}
+	
+		pdev->dev.parent = pcf->dev;
+		pdev->dev.platform_data = &pdata->reg_init_data[i];
+		pdev->dev.driver_data = pcf;
+		pcf->regulator_pdev[i] = pdev;
+
+		platform_device_add(pdev);
+	}
+
+	if (client->irq) {
+		set_irq_handler(client->irq, handle_level_irq);
+		ret = request_irq(client->irq, pcf50606_irq,
+				IRQF_TRIGGER_LOW, "pcf50606", pcf);
+
+		if (ret) {
+			dev_err(pcf->dev, "Failed to request IRQ %d\n", ret);
+			goto err;
+		}
+	} else {
+		dev_err(pcf->dev, "No IRQ configured\n");
+		goto err;
+	}
+
+	if (enable_irq_wake(client->irq) < 0)
+		dev_err(pcf->dev, "IRQ %u cannot be enabled as wake-up source"
+			"in this hardware revision", client->irq);
+
+	ret = sysfs_create_group(&client->dev.kobj, &pcf_attr_group);
+	if (ret)
+		dev_err(pcf->dev, "error creating sysfs entries\n");
+
+	if (pdata->probe_done)
+		pdata->probe_done(pcf);
+
+	return 0;
+
+err:
+	kfree(pcf);
+	return ret;
+}
+
+static int pcf50606_remove(struct i2c_client *client)
+{
+	struct pcf50606 *pcf = i2c_get_clientdata(client);
+	int i;
+
+	free_irq(pcf->irq, 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);
+
+	for (i = 0; i < PCF50606_NUM_REGULATORS; i++)
+		platform_device_unregister(pcf->regulator_pdev[i]);
+
+	kfree(pcf);
+
+	return 0;
+}
+
+static struct i2c_device_id pcf50606_id_table[] = {
+	{"pcf50606", 0x08},
+};
+
+static struct i2c_driver pcf50606_driver = {
+	.driver = {
+		.name	= "pcf50606",
+		.suspend = pcf50606_suspend,
+		.resume	= pcf50606_resume,
+	},
+	.id_table = pcf50606_id_table,
+	.probe = pcf50606_probe,
+	.remove = pcf50606_remove,
+};
+
+static int __init pcf50606_init(void)
+{
+	return i2c_add_driver(&pcf50606_driver);
+}
+
+static void pcf50606_exit(void)
+{
+	i2c_del_driver(&pcf50606_driver);
+}
+
+MODULE_DESCRIPTION("I2C chip driver for NXP PCF50606 PMU");
+MODULE_AUTHOR("Harald Welte <laforge@openmoko.org>");
+MODULE_LICENSE("GPL");
+
+module_init(pcf50606_init);
+module_exit(pcf50606_exit);
diff --git a/drivers/mfd/pcf50606-gpo.c b/drivers/mfd/pcf50606-gpo.c
new file mode 100644
index 00000000000..3510f8b48e9
--- /dev/null
+++ b/drivers/mfd/pcf50606-gpo.c
@@ -0,0 +1,119 @@
+/* Philips PCF50606 GPO Driver
+ *
+ * (C) 2006-2008 by Openmoko, Inc.
+ * Author: Balaji Rao <balajirrao@openmoko.org>
+ * All rights reserved.
+ *
+ * Broken down from monstrous PCF50606 driver mainly by
+ * Harald Welte, Andy Green Werner Almesberger and Matt Hsu
+ *
+ * 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/mfd/pcf50606/core.h>
+#include <linux/mfd/pcf50606/gpo.h>
+
+void pcf50606_gpo_set_active(struct pcf50606 *pcf, int gpo, int val)
+{
+	u8 reg, value, mask;
+
+	reg = gpo;
+	value = val;
+	mask = 0x07;
+
+	if (gpo == PCF50606_GPO2) {
+		value = val << 4;
+		mask = 0x07 << 4;
+	}
+	pcf50606_reg_set_bit_mask(pcf, reg, mask, value);
+}
+EXPORT_SYMBOL_GPL(pcf50606_gpo_set_active);
+
+int pcf50606_gpo_get_active(struct pcf50606 *pcf, int gpo)
+{
+	u8 reg, value, shift = 0;
+
+	reg = gpo;
+	if (gpo == PCF50606_GPO2)
+		shift = 4;
+	
+	value = pcf50606_reg_read(pcf, reg);
+
+	return (value >> shift) & 0x07;
+}
+EXPORT_SYMBOL_GPL(pcf50606_gpo_get_active);
+
+void pcf50606_gpo_set_standby(struct pcf50606 *pcf, int gpo, int val)
+{
+	u8 reg;
+
+	if (gpo == PCF50606_GPO1 || gpo == PCF50606_GPO2) {
+		dev_err(pcf->dev, "Can't set standby settings for GPO[12]n");
+		return;
+	}
+
+	reg = gpo;
+
+	pcf50606_reg_set_bit_mask(pcf, gpo, 0x07 << 3, val);
+}
+EXPORT_SYMBOL_GPL(pcf50606_gpo_set_standby);
+
+int pcf50606_gpo_get_standby(struct pcf50606 *pcf, int gpo)
+{
+	u8 reg, value;
+
+	if (gpo == PCF50606_GPO1 || gpo == PCF50606_GPO2) {
+		dev_err(pcf->dev, "Can't get standby settings for GPO[12]n");
+		return -EINVAL;
+	}
+
+	reg = gpo;
+	value = pcf50606_reg_read(pcf, reg);
+
+	return (value >> 3) & 0x07;
+}
+EXPORT_SYMBOL_GPL(pcf50606_gpo_get_standby);
+
+void pcf50606_gpo_invert_set(struct pcf50606 *pcf, int gpo, int invert)
+{
+	u8 reg, value, mask;
+
+	reg = gpo;
+	value = !!invert << 6;
+	mask = 0x01 << 6;
+
+	if (gpo == PCF50606_GPO1) {
+		mask = 0x01 << 4;
+		value = !!invert << 4;
+	}
+	else if (gpo == PCF50606_GPO2) {
+		mask = 0x01 << 7;
+		value = !!invert << 7;
+	}
+
+	pcf50606_reg_set_bit_mask(pcf, reg, mask, value);
+}
+EXPORT_SYMBOL_GPL(pcf50606_gpo_invert_set);
+
+int pcf50606_gpo_invert_get(struct pcf50606 *pcf, int gpo)
+{
+	u8 reg, value, shift;
+
+	reg = gpo;
+	shift = 6;
+
+	if (gpo == PCF50606_GPO1)
+		shift = 4;
+	else if (gpo == PCF50606_GPO2)
+		shift = 7;
+
+	value =  pcf50606_reg_read(pcf, reg);
+
+	return (value >> shift) & 0x01;
+}
+EXPORT_SYMBOL_GPL(pcf50606_gpo_invert_get);