regulator: PCF50633 pmic driver

Changes from V1:
	- Removed support for suspend_enable & suspend_disable functions.

Signed-off-by: Balaji Rao <balajirrao@openmoko.org>
Cc: Andy Green <andy@openmoko.com>
Cc: Liam Girdwood <lrg@slimlogic.co.uk>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Samuel Ortiz <sameo@openedhand.com>

4 files changed, 404 insertions, 0 deletions

diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig
index 39360e2a4540..e7e0cf102d6d 100644
--- a/drivers/regulator/Kconfig
+++ b/drivers/regulator/Kconfig
@@ -73,4 +73,11 @@ config REGULATOR_DA903X
           Say y here to support the BUCKs and LDOs regulators found on
           Dialog Semiconductor DA9030/DA9034 PMIC.
 
+config REGULATOR_PCF50633
+        tristate "PCF50633 regulator driver"
+        depends on MFD_PCF50633
+        help
+         Say Y here to support the voltage regulators and convertors
+         on PCF50633
+
 endif
diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile
index 254d40c02ee8..61b30c6ddecc 100644
--- a/drivers/regulator/Makefile
+++ b/drivers/regulator/Makefile
@@ -11,5 +11,6 @@ obj-$(CONFIG_REGULATOR_BQ24022) += bq24022.o
 obj-$(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
 
 ccflags-$(CONFIG_REGULATOR_DEBUG) += -DDEBUG
diff --git a/drivers/regulator/pcf50633-regulator.c b/drivers/regulator/pcf50633-regulator.c
new file mode 100644
index 000000000000..4cc85ec6e120
--- /dev/null
+++ b/drivers/regulator/pcf50633-regulator.c
@@ -0,0 +1,329 @@
+/* NXP PCF50633 PMIC Driver
+ *
+ * (C) 2006-2008 by Openmoko, Inc.
+ * Author: Balaji Rao <balajirrao@openmoko.org>
+ * All rights reserved.
+ *
+ * Broken down from monstrous PCF50633 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/pcf50633/core.h>
+#include <linux/mfd/pcf50633/pmic.h>
+
+#define PCF50633_REGULATOR(_name, _id)          \
+        {                                       \
+                .name = _name,                  \
+                .id = _id,                      \
+                .ops = &pcf50633_regulator_ops, \
+                .type = REGULATOR_VOLTAGE,      \
+                .owner = THIS_MODULE,           \
+        }
+
+static const u8 pcf50633_regulator_registers[PCF50633_NUM_REGULATORS] = {
+        [PCF50633_REGULATOR_AUTO]       = PCF50633_REG_AUTOOUT,
+        [PCF50633_REGULATOR_DOWN1]      = PCF50633_REG_DOWN1OUT,
+        [PCF50633_REGULATOR_DOWN2]      = PCF50633_REG_DOWN2OUT,
+        [PCF50633_REGULATOR_MEMLDO]     = PCF50633_REG_MEMLDOOUT,
+        [PCF50633_REGULATOR_LDO1]       = PCF50633_REG_LDO1OUT,
+        [PCF50633_REGULATOR_LDO2]       = PCF50633_REG_LDO2OUT,
+        [PCF50633_REGULATOR_LDO3]       = PCF50633_REG_LDO3OUT,
+        [PCF50633_REGULATOR_LDO4]       = PCF50633_REG_LDO4OUT,
+        [PCF50633_REGULATOR_LDO5]       = PCF50633_REG_LDO5OUT,
+        [PCF50633_REGULATOR_LDO6]       = PCF50633_REG_LDO6OUT,
+        [PCF50633_REGULATOR_HCLDO]      = PCF50633_REG_HCLDOOUT,
+};
+
+/* Bits from voltage value */
+static u8 auto_voltage_bits(unsigned int millivolts)
+{
+        if (millivolts < 1800)
+                return 0;
+        if (millivolts > 3800)
+                return 0xff;
+
+        millivolts -= 625;
+
+        return millivolts / 25;
+}
+
+static u8 down_voltage_bits(unsigned int millivolts)
+{
+        if (millivolts < 625)
+                return 0;
+        else if (millivolts > 3000)
+                return 0xff;
+
+        millivolts -= 625;
+
+        return millivolts / 25;
+}
+
+static u8 ldo_voltage_bits(unsigned int millivolts)
+{
+        if (millivolts < 900)
+                return 0;
+        else if (millivolts > 3600)
+                return 0x1f;
+
+        millivolts -= 900;
+        return millivolts / 100;
+}
+
+/* Obtain voltage value from bits */
+static unsigned int auto_voltage_value(u8 bits)
+{
+        if (bits < 0x2f)
+                return 0;
+
+        return 625 + (bits * 25);
+}
+
+
+static unsigned int down_voltage_value(u8 bits)
+{
+        return 625 + (bits * 25);
+}
+
+
+static unsigned int ldo_voltage_value(u8 bits)
+{
+        bits &= 0x1f;
+
+        return 900 + (bits * 100);
+}
+
+static int pcf50633_regulator_set_voltage(struct regulator_dev *rdev,
+                                                int min_uV, int max_uV)
+{
+        struct pcf50633 *pcf;
+        int regulator_id, millivolts;
+        u8 volt_bits, regnr;
+
+        pcf = rdev_get_drvdata(rdev);
+
+        regulator_id = rdev_get_id(rdev);
+        if (regulator_id >= PCF50633_NUM_REGULATORS)
+                return -EINVAL;
+
+        millivolts = min_uV / 1000;
+
+        regnr = pcf50633_regulator_registers[regulator_id];
+
+        switch (regulator_id) {
+        case PCF50633_REGULATOR_AUTO:
+                volt_bits = auto_voltage_bits(millivolts);
+                break;
+        case PCF50633_REGULATOR_DOWN1:
+                volt_bits = down_voltage_bits(millivolts);
+                break;
+        case PCF50633_REGULATOR_DOWN2:
+                volt_bits = down_voltage_bits(millivolts);
+                break;
+        case PCF50633_REGULATOR_LDO1:
+        case PCF50633_REGULATOR_LDO2:
+        case PCF50633_REGULATOR_LDO3:
+        case PCF50633_REGULATOR_LDO4:
+        case PCF50633_REGULATOR_LDO5:
+        case PCF50633_REGULATOR_LDO6:
+        case PCF50633_REGULATOR_HCLDO:
+                volt_bits = ldo_voltage_bits(millivolts);
+                break;
+        default:
+                return -EINVAL;
+        }
+
+        return pcf50633_reg_write(pcf, regnr, volt_bits);
+}
+
+static int pcf50633_regulator_get_voltage(struct regulator_dev *rdev)
+{
+        struct pcf50633 *pcf;
+        int regulator_id, millivolts, volt_bits;
+        u8 regnr;
+
+        pcf = rdev_get_drvdata(rdev);;
+
+        regulator_id = rdev_get_id(rdev);
+        if (regulator_id >= PCF50633_NUM_REGULATORS)
+                return -EINVAL;
+
+        regnr = pcf50633_regulator_registers[regulator_id];
+
+        volt_bits = pcf50633_reg_read(pcf, regnr);
+        if (volt_bits < 0)
+                return -1;
+
+        switch (regulator_id) {
+        case PCF50633_REGULATOR_AUTO:
+                millivolts = auto_voltage_value(volt_bits);
+                break;
+        case PCF50633_REGULATOR_DOWN1:
+                millivolts = down_voltage_value(volt_bits);
+                break;
+