Inital pcf50606 support

3 files changed, 388 insertions, 0 deletions

diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig
index f4317798e47..29f34a4de25 100644
--- a/drivers/regulator/Kconfig
+++ b/drivers/regulator/Kconfig
@@ -117,4 +117,10 @@ config REGULATOR_LP3971
 	 Say Y here to support the voltage regulators and convertors
 	 on National Semiconductors LP3971 PMIC
 
+config REGULATOR_PCF50606
+	bool "PCF50606 regulator driver"
+        depends on MFD_PCF50606
+	help
+	 Say Y here to support the voltage regulators and convertors
+	 on PCF50606
 endif
diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile
index 4d762c4cccf..ac5b42ae95c 100644
--- a/drivers/regulator/Makefile
+++ b/drivers/regulator/Makefile
@@ -16,5 +16,6 @@ obj-$(CONFIG_REGULATOR_WM8350) += wm8350-regulator.o
 obj-$(CONFIG_REGULATOR_WM8400) += wm8400-regulator.o
 obj-$(CONFIG_REGULATOR_DA903X)	+= da903x.o
 obj-$(CONFIG_REGULATOR_PCF50633) += pcf50633-regulator.o
+obj-$(CONFIG_REGULATOR_PCF50606) += pcf50606-regulator.o
 
 ccflags-$(CONFIG_REGULATOR_DEBUG) += -DDEBUG
diff --git a/drivers/regulator/pcf50606-regulator.c b/drivers/regulator/pcf50606-regulator.c
new file mode 100644
index 00000000000..58d020ef93c
--- /dev/null
+++ b/drivers/regulator/pcf50606-regulator.c
@@ -0,0 +1,381 @@
+/* NXP PCF50606 PMIC 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 and Andy Green and Werner Almesberger
+ *
+ *  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/module.h>
+#include <linux/init.h>
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/platform_device.h>
+
+#include <linux/mfd/pcf50606/core.h>
+#include <linux/mfd/pcf50606/pmic.h>
+
+#define PCF50606_REGULATOR(_name, _id) 		\
+	{					\
+		.name = _name, 			\
+		.id = _id,			\
+		.ops = &pcf50606_regulator_ops,	\
+		.type = REGULATOR_VOLTAGE, 	\
+		.owner = THIS_MODULE, 		\
+	}
+
+static const u8 pcf50606_regulator_registers[PCF50606_NUM_REGULATORS] = {
+	[PCF50606_REGULATOR_DCD]	= PCF50606_REG_DCDC1,
+	[PCF50606_REGULATOR_DCDE]	= PCF50606_REG_DCDEC1,
+	[PCF50606_REGULATOR_DCUD]	= PCF50606_REG_DCUDC1,
+	[PCF50606_REGULATOR_D1REG]	= PCF50606_REG_D1REGC1,
+	[PCF50606_REGULATOR_D2REG]	= PCF50606_REG_D2REGC1,
+	[PCF50606_REGULATOR_D3REG]	= PCF50606_REG_D3REGC1,
+	[PCF50606_REGULATOR_LPREG]	= PCF50606_REG_LPREGC1,
+	[PCF50606_REGULATOR_IOREG]	= PCF50606_REG_IOREGC,
+};
+
+static u8 dcudc_voltage(unsigned int millivolts)
+{
+	if (millivolts < 900)
+		return 0;
+	if (millivolts > 5500)
+		return 0x1f;
+	if (millivolts <= 3300) {
+		millivolts -= 900;
+		return millivolts/300;
+	}
+	if (millivolts < 4000)
+		return 0x0f;
+	else {
+		millivolts -= 4000;
+		return millivolts/100;
+	}
+}
+
+static unsigned int dcudc_2voltage(u8 bits)
+{
+	bits &= 0x1f;
+	if (bits < 0x08)
+		return 900 + bits * 300;
+	else if (bits < 0x10)
+		return 3300;
+	else
+		return 4000 + bits * 100;
+}
+
+static u8 dcdec_voltage(unsigned int millivolts)
+{
+	if (millivolts < 900)
+		return 0;
+	else if (millivolts > 3300)
+		return 0x0f;
+
+	millivolts -= 900;
+	return millivolts/300;
+}
+
+static unsigned int dcdec_2voltage(u8 bits)
+{
+	bits &= 0x0f;
+	return 900 + bits*300;
+}
+
+static u8 dcdc_voltage(unsigned int millivolts)
+{
+	if (millivolts < 900)
+		return 0;
+	else if (millivolts > 3600)
+		return 0x1f;
+
+	if (millivolts < 1500) {
+		millivolts -= 900;
+		return millivolts/25;
+	} else {
+		millivolts -= 1500;
+		return 0x18 + millivolts/300;
+	}
+}
+
+static unsigned int dcdc_2voltage(u8 bits)
+{
+	bits &= 0x1f;
+	if ((bits & 0x18) == 0x18)
+		return 1500 + ((bits & 0x7) * 300);
+	else
+		return 900 + (bits * 25);
+}
+
+static u8 dx_voltage(unsigned int millivolts)
+{
+	if (millivolts < 900)
+		return 0;
+	else if (millivolts > 3300)
+		return 0x18;
+
+	millivolts -= 900;
+	return millivolts/100;
+}
+
+static unsigned int dx_2voltage(u8 bits)
+{
+	bits &= 0x1f;
+	return 900 + (bits * 100);
+}
+
+static int pcf50606_regulator_set_voltage(struct regulator_dev *rdev,
+						int min_uV, int max_uV)
+{
+	struct pcf50606 *pcf;
+	int regulator_id, millivolts, rc;
+	u8 volt_bits, regnr;
+
+	pcf = rdev_get_drvdata(rdev);
+
+	regulator_id = rdev_get_id(rdev);
+	if (regulator_id >= PCF50606_NUM_REGULATORS)
+		return -EINVAL;
+
+	millivolts = min_uV / 1000;
+
+	switch (regulator_id) {
+	case PCF50606_REGULATOR_DCD:
+		volt_bits = dcdc_voltage(millivolts);
+		rc = pcf50606_reg_set_bit_mask(pcf, PCF50606_REG_DCDC1, 0x1f,
+				      volt_bits);
+		break;
+	case PCF50606_REGULATOR_DCDE:
+		volt_bits = dcdec_voltage(millivolts);
+		rc = pcf50606_reg_set_bit_mask(pcf, PCF50606_REG_DCDEC1, 0x0f,
+				      volt_bits);
+		break;
+	case PCF50606_REGULATOR_DCUD:
+		volt_bits = dcudc_voltage(millivolts);
+		rc = pcf50606_reg_set_bit_mask(pcf, PCF50606_REG_DCUDC1, 0x1f,
+				      volt_bits);
+		break;
+	case PCF50606_REGULATOR_D1REG:
+	case PCF50606_REGULATOR_D2REG:
+	case PCF50606_REGULATOR_D3REG:
+		regnr = PCF50606_REG_D1REGC1 +
+		       		(regulator_id - PCF50606_REGULATOR_D1REG);
+		volt_bits = dx_voltage(millivolts);
+		rc = pcf50606_reg_set_bit_mask(pcf, regnr, 0x1f, volt_bits);
+		break;
+	case PCF50606_REGULATOR_LPREG:
+		volt_bits = dx_voltage(millivolts);
+		rc = pcf50606_reg_set_bit_mask(pcf, PCF50606_REG_LPREGC1, 0x1f,
+					      volt_bits);
+		break;
+	case PCF50606_REGULATOR_IOREG:
+		if (millivolts < 1800)
+			return -EINVAL;
+		volt_bits = dx_voltage(millivolts);
+		rc = pcf50606_reg_set_bit_mask(pcf, PCF50606_REG_IOREGC, 0x1f,
+					      volt_bits);
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return rc;
+}
+
+static int pcf50606_regulator_get_voltage(struct regulator_dev *rdev)
+{
+	struct pcf50606 *pcf;
+	u8 volt_bits, regnr;
+	int rc = 0, regulator_id;
+
+
+	pcf = rdev_get_drvdata(rdev);
+
+	regulator_id = rdev_get_id(rdev);
+	if (regulator_id >= PCF50606_NUM_REGULATORS)
+		return -EINVAL;
+
+	switch (regulator_id) {
+	case PCF50606_REGULATOR_DCD:
+		volt_bits = pcf50606_reg_read(pcf, PCF50606_REG_DCDC1) & 0x1f;
+		rc = dcdc_2voltage(volt_bits);
+		break;
+	case PCF50606_REGULATOR_DCDE:
+		volt_bits = pcf50606_reg_read(pcf, PCF50606_REG_DCDEC1) & 0x0f;
+		rc = dcdec_2voltage(volt_bits);
+		break;
+	case PCF50606_REGULATOR_DCUD:
+		volt_bits = pcf50606_reg_read(pcf, PCF50606_REG_DCUDC1) & 0x1f;
+		rc = dcudc_2voltage(volt_bits);
+		break;
+	case PCF50606_REGULATOR_D1REG:
+	case PCF50606_REGULATOR_D2REG:
+	case PCF50606_REGULATOR_D3REG:
+		regnr = PCF50606_REG_D1REGC1 + (regulator_id - PCF50606_REGULATOR_D1REG);
+		volt_bits = pcf50606_reg_read(pcf, regnr) & 0x1f;
+		if (volt_bits > 0x18)
+			volt_bits = 0x18;
+		rc = dx_2voltage(volt_bits);
+		break;
+	case PCF50606_REGULATOR_LPREG:
+		volt_bits = pcf50606_reg_read(pcf, PCF50606_REG_LPREGC1) & 0x1f;
+		if (volt_bits > 0x18)
+			volt_bits = 0x18;
+		rc = dx_2voltage(volt_bits);
+		break;
+	case PCF50606_REGULATOR_IOREG:
+		volt_bits = pcf50606_reg_read(pcf, PCF50606_REG_IOREGC) & 0x1f;
+		if (volt_bits > 0x18)
+			volt_bits = 0x18;
+		rc = dx_2voltage(volt_bits);
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return rc * 1000;
+
+}
+
+static int pcf50606_regulator_enable(struct regulator_dev *rdev)
+{
+	struct pcf50606 *pcf = rdev_get_drvdata(rdev);
+	int regulator_id;
+	u8 regnr;
+
+	regulator_id = rdev_get_id(rdev);
+	if (regulator_id >= PCF50606_NUM_REGULATORS)
+		return -EINVAL;
+	
+	regnr = pcf50606_regulator_registers[regulator_id];
+
+	return pcf50606_reg_set_bit_mask(pcf, regnr, 0xe0, 0xe0);
+}
+
+static int pcf50606_regulator_disable(struct regulator_dev *rdev)
+{
+	struct pcf50606 *pcf = rdev_get_drvdata(rdev);
+	int regulator_id;
+	u8 regnr;
+
+	regulator_id = rdev_get_id(rdev);
+	if (regulator_id >= PCF50606_NUM_REGULATORS)
+		return -EINVAL;
+
+	/* IOREG cannot be powered off since it powers the PMU I2C */
+	if (regulator_id == PCF50606_REGULATOR_IOREG)
+		return -EINVAL;
+	
+	regnr = pcf50606_regulator_registers[regulator_id];
+
+	return pcf50606_reg_set_bit_mask(pcf, regnr, 0xe0, 0);
+}
+
+static int pcf50606_regulator_is_enabled(struct regulator_dev *rdev)
+{
+	struct pcf50606 *pcf = rdev_get_drvdata(rdev);
+	int regulator_id = rdev_get_id(rdev);
+	u8 regnr, val;
+
+	regulator_id = rdev_get_id(rdev);
+	if (regulator_id >= PCF50606_NUM_REGULATORS)
+		return -EINVAL;
+
+	/* the *ENA register is always one after the *OUT register */
+	regnr = pcf50606_regulator_registers[regulator_id];
+	val = (pcf50606_reg_read(pcf, regnr) & 0xe0) >> 5;
+
+	/* PWREN1 = 1, PWREN2 = 1, see table 16 of datasheet */
+	if (val == 0 || val == 5)
+		return 0;
+
+	return 1;
+}
+
+static struct regulator_ops pcf50606_regulator_ops = {
+	.set_voltage = pcf50606_regulator_set_voltage,
+	.get_voltage = pcf50606_regulator_get_voltage,
+	.enable = pcf50606_regulator_enable,
+	.disable = pcf50606_regulator_disable,
+	.is_enabled = pcf50606_regulator_is_enabled,
+};
+
+static struct regulator_desc regulators[] = {
+	[PCF50606_REGULATOR_DCD] =
+		PCF50606_REGULATOR("dcd", PCF50606_REGULATOR_DCD),
+	[PCF50606_REGULATOR_DCDE] =
+		PCF50606_REGULATOR("dcde", PCF50606_REGULATOR_DCDE),
+	[PCF50606_REGULATOR_DCUD] =
+		PCF50606_REGULATOR("dcud", PCF50606_REGULATOR_DCUD),
+	[PCF50606_REGULATOR_D1REG] =
+		PCF50606_REGULATOR("d1reg", PCF50606_REGULATOR_D1REG),
+	[PCF50606_REGULATOR_D2REG] =
+		PCF50606_REGULATOR("d2reg", PCF50606_REGULATOR_D2REG),
+	[PCF50606_REGULATOR_D3REG] =
+		PCF50606_REGULATOR("d3reg", PCF50606_REGULATOR_D3REG),
+	[PCF50606_REGULATOR_LPREG] =
+		PCF50606_REGULATOR("lpreg", PCF50606_REGULATOR_LPREG),
+	[PCF50606_REGULATOR_IOREG] =
+		PCF50606_REGULATOR("ioreg", PCF50606_REGULATOR_IOREG),
+};
+
+static int __devinit pcf50606_regulator_probe(struct platform_device *pdev)
+{
+	struct regulator_dev *rdev;
+	struct pcf50606 *pcf;
+
+	/* Already set by core driver */
+	pcf = platform_get_drvdata(pdev);
+
+	rdev = regulator_register(&regulators[pdev->id], &pdev->dev,
+					pdev->dev.platform_data, pcf);
+	if (IS_ERR(rdev))
+		return PTR_ERR(rdev);
+
+	if (pcf->pdata->regulator_registered)
+		pcf->pdata->regulator_registered(pcf, pdev->id);
+
+	return 0;
+}
+
+static int __devexit pcf50606_regulator_remove(struct platform_device *pdev)
+{
+	struct regulator_dev *rdev = platform_get_drvdata(pdev);
+
+	regulator_unregister(rdev);
+
+	return 0;
+}
+
+static struct platform_driver pcf50606_regulator_driver = {
+	.driver = {
+		.name = "pcf50606-regltr",
+	},
+	.probe = pcf50606_regulator_probe,
+	.remove = __devexit_p(pcf50606_regulator_remove),
+};
+
+static int __init pcf50606_regulator_init(void)
+{
+	return platform_driver_register(&pcf50606_regulator_driver);
+}
+module_init(pcf50606_regulator_init);
+
+static void __exit pcf50606_regulator_exit(void)
+{
+	platform_driver_unregister(&pcf50606_regulator_driver);
+}
+module_exit(pcf50606_regulator_exit);
+
+MODULE_AUTHOR("Balaji Rao <balajirrao@openmoko.org>");
+MODULE_DESCRIPTION("PCF50606 regulator driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:pcf50606-regulator");