mfd: Align ab8500 with the abx500 interface

This patch makes the ab8500 mixed signal chip expose the same
interface for register access as the ab3100, ab3550 and ab5500 chip.
The ab8500_read() and ab8500_write() is removed and replaced with
abx500_get_register_interruptible() and
abx500_set_register_interruptible().

Signed-off-by: Mattias Wallin <mattias.wallin@stericsson.com>
Acked-by: Linus Walleij <linus.walleij@stericsson.com>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

6 files changed, 296 insertions, 209 deletions

diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index 8a463e6c22a..ec0af47a905 100644
--- a/drivers/mfd/Kconfig
+++ b/drivers/mfd/Kconfig
@@ -434,7 +434,7 @@ config PCF50633_GPIO
 
 config ABX500_CORE
 	bool "ST-Ericsson ABX500 Mixed Signal Circuit register functions"
-	default y if ARCH_U300
+	default y if ARCH_U300 || ARCH_U8500
 	help
 	  Say yes here if you have the ABX500 Mixed Signal IC family
 	  chips. This core driver expose register access functions.
@@ -475,7 +475,7 @@ config EZX_PCAP
 
 config AB8500_CORE
 	bool "ST-Ericsson AB8500 Mixed Signal Power Management chip"
-	depends on SPI=y && GENERIC_HARDIRQS
+	depends on SPI=y && GENERIC_HARDIRQS && ABX500_CORE
 	select MFD_CORE
 	help
 	  Select this option to enable access to AB8500 power management
diff --git a/drivers/mfd/ab8500-core.c b/drivers/mfd/ab8500-core.c
index b8c4b80e4c4..373783146b5 100644
--- a/drivers/mfd/ab8500-core.c
+++ b/drivers/mfd/ab8500-core.c
@@ -4,6 +4,7 @@
  * License Terms: GNU General Public License v2
  * Author: Srinidhi Kasagar <srinidhi.kasagar@stericsson.com>
  * Author: Rabin Vincent <rabin.vincent@stericsson.com>
+ * Changes: Mattias Wallin <mattias.wallin@stericsson.com>
  */
 
 #include <linux/kernel.h>
@@ -15,6 +16,7 @@
 #include <linux/module.h>
 #include <linux/platform_device.h>
 #include <linux/mfd/core.h>
+#include <linux/mfd/abx500.h>
 #include <linux/mfd/ab8500.h>
 #include <linux/regulator/ab8500.h>
 
@@ -22,71 +24,71 @@
  * Interrupt register offsets
  * Bank : 0x0E
  */
-#define AB8500_IT_SOURCE1_REG		0x0E00
-#define AB8500_IT_SOURCE2_REG		0x0E01
-#define AB8500_IT_SOURCE3_REG		0x0E02
-#define AB8500_IT_SOURCE4_REG		0x0E03
-#define AB8500_IT_SOURCE5_REG		0x0E04
-#define AB8500_IT_SOURCE6_REG		0x0E05
-#define AB8500_IT_SOURCE7_REG		0x0E06
-#define AB8500_IT_SOURCE8_REG		0x0E07
-#define AB8500_IT_SOURCE19_REG		0x0E12
-#define AB8500_IT_SOURCE20_REG		0x0E13
-#define AB8500_IT_SOURCE21_REG		0x0E14
-#define AB8500_IT_SOURCE22_REG		0x0E15
-#define AB8500_IT_SOURCE23_REG		0x0E16
-#define AB8500_IT_SOURCE24_REG		0x0E17
+#define AB8500_IT_SOURCE1_REG		0x00
+#define AB8500_IT_SOURCE2_REG		0x01
+#define AB8500_IT_SOURCE3_REG		0x02
+#define AB8500_IT_SOURCE4_REG		0x03
+#define AB8500_IT_SOURCE5_REG		0x04
+#define AB8500_IT_SOURCE6_REG		0x05
+#define AB8500_IT_SOURCE7_REG		0x06
+#define AB8500_IT_SOURCE8_REG		0x07
+#define AB8500_IT_SOURCE19_REG		0x12
+#define AB8500_IT_SOURCE20_REG		0x13
+#define AB8500_IT_SOURCE21_REG		0x14
+#define AB8500_IT_SOURCE22_REG		0x15
+#define AB8500_IT_SOURCE23_REG		0x16
+#define AB8500_IT_SOURCE24_REG		0x17
 
 /*
  * latch registers
  */
-#define AB8500_IT_LATCH1_REG		0x0E20
-#define AB8500_IT_LATCH2_REG		0x0E21
-#define AB8500_IT_LATCH3_REG		0x0E22
-#define AB8500_IT_LATCH4_REG		0x0E23
-#define AB8500_IT_LATCH5_REG		0x0E24
-#define AB8500_IT_LATCH6_REG		0x0E25
-#define AB8500_IT_LATCH7_REG		0x0E26
-#define AB8500_IT_LATCH8_REG		0x0E27
-#define AB8500_IT_LATCH9_REG		0x0E28
-#define AB8500_IT_LATCH10_REG		0x0E29
-#define AB8500_IT_LATCH19_REG		0x0E32
-#define AB8500_IT_LATCH20_REG		0x0E33
-#define AB8500_IT_LATCH21_REG		0x0E34
-#define AB8500_IT_LATCH22_REG		0x0E35
-#define AB8500_IT_LATCH23_REG		0x0E36
-#define AB8500_IT_LATCH24_REG		0x0E37
+#define AB8500_IT_LATCH1_REG		0x20
+#define AB8500_IT_LATCH2_REG		0x21
+#define AB8500_IT_LATCH3_REG		0x22
+#define AB8500_IT_LATCH4_REG		0x23
+#define AB8500_IT_LATCH5_REG		0x24
+#define AB8500_IT_LATCH6_REG		0x25
+#define AB8500_IT_LATCH7_REG		0x26
+#define AB8500_IT_LATCH8_REG		0x27
+#define AB8500_IT_LATCH9_REG		0x28
+#define AB8500_IT_LATCH10_REG		0x29
+#define AB8500_IT_LATCH19_REG		0x32
+#define AB8500_IT_LATCH20_REG		0x33
+#define AB8500_IT_LATCH21_REG		0x34
+#define AB8500_IT_LATCH22_REG		0x35
+#define AB8500_IT_LATCH23_REG		0x36
+#define AB8500_IT_LATCH24_REG		0x37
 
 /*
  * mask registers
  */
 
-#define AB8500_IT_MASK1_REG		0x0E40
-#define AB8500_IT_MASK2_REG		0x0E41
-#define AB8500_IT_MASK3_REG		0x0E42
-#define AB8500_IT_MASK4_REG		0x0E43
-#define AB8500_IT_MASK5_REG		0x0E44
-#define AB8500_IT_MASK6_REG		0x0E45
-#define AB8500_IT_MASK7_REG		0x0E46
-#define AB8500_IT_MASK8_REG		0x0E47
-#define AB8500_IT_MASK9_REG		0x0E48
-#define AB8500_IT_MASK10_REG		0x0E49
-#define AB8500_IT_MASK11_REG		0x0E4A
-#define AB8500_IT_MASK12_REG		0x0E4B
-#define AB8500_IT_MASK13_REG		0x0E4C
-#define AB8500_IT_MASK14_REG		0x0E4D
-#define AB8500_IT_MASK15_REG		0x0E4E
-#define AB8500_IT_MASK16_REG		0x0E4F
-#define AB8500_IT_MASK17_REG		0x0E50
-#define AB8500_IT_MASK18_REG		0x0E51
-#define AB8500_IT_MASK19_REG		0x0E52
-#define AB8500_IT_MASK20_REG		0x0E53
-#define AB8500_IT_MASK21_REG		0x0E54
-#define AB8500_IT_MASK22_REG		0x0E55
-#define AB8500_IT_MASK23_REG		0x0E56
-#define AB8500_IT_MASK24_REG		0x0E57
-
-#define AB8500_REV_REG			0x1080
+#define AB8500_IT_MASK1_REG		0x40
+#define AB8500_IT_MASK2_REG		0x41
+#define AB8500_IT_MASK3_REG		0x42
+#define AB8500_IT_MASK4_REG		0x43
+#define AB8500_IT_MASK5_REG		0x44
+#define AB8500_IT_MASK6_REG		0x45
+#define AB8500_IT_MASK7_REG		0x46
+#define AB8500_IT_MASK8_REG		0x47
+#define AB8500_IT_MASK9_REG		0x48
+#define AB8500_IT_MASK10_REG		0x49
+#define AB8500_IT_MASK11_REG		0x4A
+#define AB8500_IT_MASK12_REG		0x4B
+#define AB8500_IT_MASK13_REG		0x4C
+#define AB8500_IT_MASK14_REG		0x4D
+#define AB8500_IT_MASK15_REG		0x4E
+#define AB8500_IT_MASK16_REG		0x4F
+#define AB8500_IT_MASK17_REG		0x50
+#define AB8500_IT_MASK18_REG		0x51
+#define AB8500_IT_MASK19_REG		0x52
+#define AB8500_IT_MASK20_REG		0x53
+#define AB8500_IT_MASK21_REG		0x54
+#define AB8500_IT_MASK22_REG		0x55
+#define AB8500_IT_MASK23_REG		0x56
+#define AB8500_IT_MASK24_REG		0x57
+
+#define AB8500_REV_REG			0x80
 
 /*
  * Map interrupt numbers to the LATCH and MASK register offsets, Interrupt
@@ -99,96 +101,132 @@ static const int ab8500_irq_regoffset[AB8500_NUM_IRQ_REGS] = {
 	0, 1, 2, 3, 4, 6, 7, 8, 9, 18, 19, 20, 21,
 };
 
-static int __ab8500_write(struct ab8500 *ab8500, u16 addr, u8 data)
+static int ab8500_get_chip_id(struct device *dev)
+{
+	struct ab8500 *ab8500 = dev_get_drvdata(dev->parent);
+	return (int)ab8500->chip_id;
+}
+
+static int set_register_interruptible(struct ab8500 *ab8500, u8 bank,
+	u8 reg, u8 data)
 {
 	int ret;
+	/*
+	 * Put the u8 bank and u8 register together into a an u16.
+	 * The bank on higher 8 bits and register in lower 8 bits.
+	 * */
+	u16 addr = ((u16)bank) << 8 | reg;
 
 	dev_vdbg(ab8500->dev, "wr: addr %#x <= %#x\n", addr, data);
 
+	ret = mutex_lock_interruptible(&ab8500->lock);
+	if (ret)
+		return ret;
+
 	ret = ab8500->write(ab8500, addr, data);
 	if (ret < 0)
 		dev_err(ab8500->dev, "failed to write reg %#x: %d\n",
 			addr, ret);
+	mutex_unlock(&ab8500->lock);
 
 	return ret;
 }
 
-/**
- * ab8500_write() - write an AB8500 register
- * @ab8500: device to write to
- * @addr: address of the register
- * @data: value to write
- */
-int ab8500_write(struct ab8500 *ab8500, u16 addr, u8 data)
+static int ab8500_set_register(struct device *dev, u8 bank,
+	u8 reg, u8 value)
 {
-	int ret;
-
-	mutex_lock(&ab8500->lock);
-	ret = __ab8500_write(ab8500, addr, data);
-	mutex_unlock(&ab8500->lock);
+	struct ab8500 *ab8500 = dev_get_drvdata(dev->parent);
 
-	return ret;
+	return set_register_interruptible(ab8500, bank, reg, value);
 }
-EXPORT_SYMBOL_GPL(ab8500_write);
 
-static int __ab8500_read(struct ab8500 *ab8500, u16 addr)
+static int get_register_interruptible(struct ab8500 *ab8500, u8 bank,
+	u8 reg, u8 *value)
 {
 	int ret;
+	/* put the u8 bank and u8 reg together into a an u16.
+	 * bank on higher 8 bits and reg in lower */
+	u16 addr = ((u16)bank) << 8 | reg;
+
+	ret = mutex_lock_interruptible(&ab8500->lock);
+	if (ret)
+		return ret;
 
 	ret = ab8500->read(ab8500, addr);
 	if (ret < 0)
 		dev_err(ab8500->dev, "failed to read reg %#x: %d\n",
 			addr, ret);
+	else
+		*value = ret;
 
+	mutex_unlock(&ab8500->lock);
 	dev_vdbg(ab8500->dev, "rd: addr %#x => data %#x\n", addr, ret);
 
 	return ret;
 }
 
-/**
- * ab8500_read() - read an AB8500 register
- * @ab8500: device to read from
- * @addr: address of the register
- */
-int ab8500_read(struct ab8500 *ab8500, u16 addr)
+static int ab8500_get_register(struct device *dev, u8 bank,
+	u8 reg, u8 *value)
 {
-	int ret;
-
-	mutex_lock(&ab8500->lock);
-	ret = __ab8500_read(ab8500, addr);
-	mutex_unlock(&ab8500->lock);
+	struct ab8500 *ab8500 = dev_get_drvdata(dev->parent);
 
-	return ret;
+	return get_register_interruptible(ab8500, bank, reg, value);
 }
-EXPORT_SYMBOL_GPL(ab8500_read);
-
-/**
- * ab8500_set_bits() - set a bitfield in an AB8500 register
- * @ab8500: device to read from
- * @addr: address of the register
- * @mask: mask of the bitfield to modify
- * @data: value to set to the bitfield
- */
-int ab8500_set_bits(struct ab8500 *ab8500, u16 addr, u8 mask, u8 data)
+
+static int mask_and_set_register_interruptible(struct ab8500 *ab8500, u8 bank,
+	u8 reg, u8 bitmask, u8 bitvalues)
 {
 	int ret;
+	u8 data;
+	/* put the u8 bank and u8 reg together into a an u16.
+	 * bank on higher 8 bits and reg in lower */
+	u16 addr = ((u16)bank) << 8 | reg;
 
-	mutex_lock(&ab8500->lock);
+	ret = mutex_lock_interruptible(&ab8500->lock);
+	if (ret)
+		return ret;
 
-	ret = __ab8500_read(ab8500, addr);
-	if (ret < 0)
+	ret = ab8500->read(ab8500, addr);
+	if (ret < 0) {
+		dev_err(ab8500->dev, "failed to read reg %#x: %d\n",
+			addr, ret);
 		goto out;
+	}
 
-	ret &= ~mask;
-	ret |= data;
+	data = (u8)ret;
+	data = (~bitmask & data) | (bitmask & bitvalues);
 
-	ret = __ab8500_write(ab8500, addr, ret);
+	ret = ab8500->write(ab8500, addr, data);
+	if (ret < 0)
+		dev_err(ab8500->dev, "failed to write reg %#x: %d\n",
+			addr, ret);
 
+	dev_vdbg(ab8500->dev, "mask: addr %#x => data %#x\n", addr, data);
 out:
 	mutex_unlock(&ab8500->lock);
 	return ret;
 }
-EXPORT_SYMBOL_GPL(ab8500_set_bits);
+
+static int ab8500_mask_and_set_register(struct device *dev,
+	u8 bank, u8 reg, u8 bitmask, u8 bitvalues)
+{
+	struct ab8500 *ab8500 = dev_get_drvdata(dev->parent);
+
+	return mask_and_set_register_interruptible(ab8500, bank, reg,
+		bitmask, bitvalues);
+
+}
+
+static struct abx500_ops ab8500_ops = {
+	.get_chip_id = ab8500_get_chip_id,
+	.get_register = ab8500_get_register,
+	.set_register = ab8500_set_register,
+	.get_register_page = NULL,
+	.set_register_page = NULL,
+	.mask_and_set_register = ab8500_mask_and_set_register,
+	.event_registers_startup_state_get = NULL,
+	.startup_irq_enabled = NULL,
+};
 
 static void ab8500_irq_lock(unsigned int irq)
 {
@@ -213,7 +251,7 @@ static void ab8500_irq_sync_unlock(unsigned int irq)
 		ab8500->oldmask[i] = new;
 
 		reg = AB8500_IT_MASK1_REG + ab8500_irq_regoffset[i];
-		ab8500_write(ab8500, reg, new);
+		set_register_interruptible(ab8500, AB8500_INTERRUPT, reg, new);
 	}
 
 	mutex_unlock(&ab8500->irq_lock);
@@ -257,9 +295,11 @@ static irqreturn_t ab8500_irq(int irq, void *dev)
 	for (i = 0; i < AB8500_NUM_IRQ_REGS; i++) {
 		int regoffset = ab8500_irq_regoffset[i];
 		int status;
+		u8 value;
 
-		status = ab8500_read(ab8500, AB8500_IT_LATCH1_REG + regoffset);
-		if (status <= 0)
+		status = get_register_interruptible(ab8500, AB8500_INTERRUPT,
+			AB8500_IT_LATCH1_REG + regoffset, &value);
+		if (status < 0 || value == 0)
 			continue;
 
 		do {
@@ -267,8 +307,8 @@ static irqreturn_t ab8500_irq(int irq, void *dev)
 			int line = i * 8 + bit;
 
 			handle_nested_irq(ab8500->irq_base + line);
-			status &= ~(1 << bit);
-		} while (status);
+			value &= ~(1 << bit);
+		} while (value);
 	}
 
 	return IRQ_HANDLED;
@@ -381,6 +421,7 @@ int __devinit ab8500_init(struct ab8500 *ab8500)
 	struct ab8500_platform_data *plat = dev_get_platdata(ab8500->dev);
 	int ret;
 	int i;
+	u8 value;
 
 	if (plat)
 		ab8500->irq_base = plat->irq_base;
@@ -388,7 +429,8 @@ int __devinit ab8500_init(struct ab8500 *ab8500)
 	mutex_init(&ab8500->lock);
 	mutex_init(&ab8500->irq_lock);
 
-	ret = ab8500_read(ab8500, AB8500_REV_REG);
+	ret = get_register_interruptible(ab8500, AB8500_MISC,
+		AB8500_REV_REG, &value);
 	if (ret < 0)
 		return ret;
 
@@ -397,28 +439,37 @@ int __devinit ab8500_init(struct ab8500 *ab8500)
 	 * 0x10 - Cut 1.0
 	 * 0x11 - Cut 1.1
 	 */
-	if (ret == 0x0 || ret == 0x10 || ret == 0x11) {
-		ab8500->revision = ret;
-		dev_info(ab8500->dev, "detected chip, revision: %#x\n", ret);
+	if (value == 0x0 || value == 0x10 || value == 0x11) {
+		ab8500->revision = value;
+		dev_info(ab8500->dev, "detected chip, revision: %#x\n", value);
 	} else {
-		dev_err(ab8500->dev, "unknown chip, revision: %#x\n", ret);
+		dev_err(ab8500->dev, "unknown chip, revision: %#x\n", value);
 		return -EINVAL;
 	}
+	ab8500->chip_id = value;
 
 	if (plat && plat->init)
 		plat->init(ab8500);
 
 	/* Clear and mask all interrupts */
 	for (i = 0; i < 10; i++) {
-		ab8500_read(ab8500, AB8500_IT_LATCH1_REG + i);
-		ab8500_write(ab8500, AB8500_IT_MASK1_REG + i, 0xff);
+		get_register_interruptible(ab8500, AB8500_INTERRUPT,
+			AB8500_IT_LATCH1_REG + i, &value);
+		set_register_interruptible(ab8500, AB8500_INTERRUPT,
+			AB8500_IT_MASK1_REG + i, 0xff);
 	}
 
 	for (i = 18; i < 24; i++) {
-		ab8500_read(ab8500, AB8500_IT_LATCH1_REG + i);
-		ab8500_write(ab8500, AB8500_IT_MASK1_REG + i, 0xff);
+		get_register_interruptible(ab8500, AB8500_INTERRUPT,
+			AB8500_IT_LATCH1_REG + i, &value);
+		set_register_interruptible(ab8500, AB8500_INTERRUPT,
+			AB8500_IT_MASK1_REG + i, 0xff);
 	}
 
+	ret = abx500_register_ops(ab8500->dev, &ab8500_ops);
+	if (ret)
+		return ret;
+
 	for (i = 0; i < AB8500_NUM_IRQ_REGS; i++)
 		ab8500->mask[i] = ab8500->oldmask[i] = 0xff;
 
diff --git a/drivers/regulator/ab8500.c b/drivers/regulator/ab8500.c
index 28c7ae67cec..db6b70f2051 100644
--- a/drivers/regulator/ab8500.c
+++ b/drivers/regulator/ab8500.c
@@ -21,6 +21,7 @@
 #include <linux/err.h>
 #include <linux/platform_device.h>
 #include <linux/mfd/ab8500.h>
+#include <linux/mfd/abx500.h>
 #include <linux/regulator/driver.h>
 #include <linux/regulator/machine.h>
 #include <linux/regulator/ab8500.h>
@@ -33,9 +34,11 @@
  * @max_uV: maximum voltage (for variable voltage supplies)
  * @min_uV: minimum voltage (for variable voltage supplies)
  * @fixed_uV: typical voltage (for fixed voltage supplies)
+ * @update_bank: bank to control on/off
  * @update_reg: register to control on/off
  * @mask: mask to enable/disable regulator
  * @enable: bits to enable the regulator in normal(high power) mode
+ * @voltage_bank: bank to control regulator voltage
  * @voltage_reg: register to control regulator voltage
  * @voltage_mask: mask to control regulator voltage
  * @supported_voltages: supported voltage table
@@ -49,11 +52,13 @@ struct ab8500_regulator_info {
 	int max_uV;
 	int min_uV;
 	int fixed_uV;
-	int update_reg;
-	int mask;
-	int enable;
-	int voltage_reg;
-	int voltage_mask;
+	u8 update_bank;
+	u8 update_reg;
+	u8 mask;
+	u8 enable;
+	u8 voltage_bank;
+	u8 voltage_reg;
+	u8 voltage_mask;
 	int const *supported_voltages;
 	int voltages_len;
 };
@@ -97,8 +102,8 @@ static int ab8500_regulator_enable(struct regulator_dev *rdev)
 	if (regulator_id >= AB8500_NUM_REGULATORS)
 		return -EINVAL;
 
-	ret = ab8500_set_bits(info->ab8500, info->update_reg,
-			info->mask, info->enable);
+	ret = abx500_mask_and_set_register_interruptible(info->dev,
+		info->update_bank, info->update_reg, info->mask, info->enable);
 	if (ret < 0)
 		dev_err(rdev_get_dev(rdev),
 			"couldn't set enable bits for regulator\n");
@@ -114,8 +119,8 @@ static int ab8500_regulator_disable(struct regulator_dev *rdev)
 	if (regulator_id >= AB8500_NUM_REGULATORS)
 		return -EINVAL;
 
-	ret = ab8500_set_bits(info->ab8500, info->update_reg,
-			info->mask, 0x0);
+	ret = abx500_mask_and_set_register_interruptible(info->dev,
+		info->update_bank, info->update_reg, info->mask, 0x0);
 	if (ret < 0)
 		dev_err(rdev_get_dev(rdev),
 			"couldn't set disable bits for regulator\n");
@@ -126,19 +131,21 @@ static int ab8500_regulator_is_enabled(struct regulator_dev *rdev)
 {
 	int regulator_id, ret;
 	struct ab8500_regulator_info *info = rdev_get_drvdata(rdev);
+	u8 value;
 
 	regulator_id = rdev_get_id(rdev);
 	if (regulator_id >= AB8500_NUM_REGULATORS)
 		return -EINVAL;
 
-	ret = ab8500_read(info->ab8500, info->update_reg);
+	ret = abx500_get_register_interruptible(info->dev,
+		info->update_bank, info->update_reg, &value);
 	if (ret < 0) {
 		dev_err(rdev_get_dev(rdev),
 			"couldn't read 0x%x register\n", info->update_reg);
 		return ret;
 	}
 
-	if (ret & info->mask)
+	if (value & info->mask)
 		return true;
 	else
 		return false;
@@ -165,14 +172,16 @@ static int ab8500_list_voltage(struct regulator_dev *rdev, unsigned selector)
 
 static int ab8500_regulator_get_voltage(struct regulator_dev *rdev)
 {
-	int regulator_id, ret, val;
+	int regulator_id, ret;
 	struct ab8500_regulator_info *info = rdev_get_drvdata(rdev);
+	u8 value;
 
 	regulator_id = rdev_get_id(rdev);
 	if (regulator_id >= AB8500_NUM_REGULATORS)
 		return -EINVAL;
 
-	ret = ab8500_read(info->ab8500, info->voltage_reg);
+	ret = abx500_get_register_interruptible(info->dev, info->voltage_bank,
+		info->voltage_reg, &value);
 	if (ret < 0) {
 		dev_err(rdev_get_dev(rdev),
 			"couldn't read voltage reg for regulator\n");
@@ -180,11 +189,11 @@ static int ab8500_regulator_get_voltage(struct regulator_dev *rdev)
 	}
 
 	/* vintcore has a different layout */
-	val = ret & info->voltage_mask;
+	value &= info->voltage_mask;
 	if (regulator_id == AB8500_LDO_INTCORE)
-		ret = info->supported_voltages[val >> 0x3];
+		ret = info->supported_voltages[value >> 0x3];
 	else
-		ret = info->supported_voltages[val];
+		ret = info->supported_voltages[value];
 
 	return ret;
 }
@@ -224,8 +233,9 @@ static int ab8500_regulator_set_voltage(struct regulator_dev *rdev,
 	}
 
 	/* set the registers for the request */
-	ret = ab8500_set_bits(info->ab8500, info->voltage_reg,
-				info->voltage_mask, ret);
+	ret = abx500_mask_and_set_register_interruptible(info->dev,
+		info->voltage_bank, info->voltage_reg,
+		info->voltage_mask, (u8)ret);
 	if (ret < 0)
 		dev_err(rdev_get_dev(rdev),
 		"couldn't set voltage reg for regulator\n");
@@ -262,9 +272,9 @@ static struct regulator_ops ab8500_ldo_fixed_ops = {
 	.list_voltage	= ab8500_list_voltage,
 };
 
-#define AB8500_LDO(_id, min, max, reg, reg_mask, reg_enable,	\
-		volt_reg, volt_mask, voltages,			\
-			len_volts)				\
+#define AB8500_LDO(_id, min, max, bank, reg, reg_mask,		\
+		reg_enable, volt_bank, volt_reg, volt_mask,	\
+		voltages, len_volts)				\
 {								\
 	.desc	= {						\
 		.name	= "LDO-" #_id,				\
@@ -275,9 +285,11 @@ static struct regulator_ops ab8500_ldo_fixed_ops = {
 	},							\
 	.min_uV		= (min) * 1000,				\
 	.max_uV		= (max) * 1000,				\
+	.update_bank	= bank,					\
 	.update_reg	= reg,					\
 	.mask		= reg_mask,				\
 	.enable		= reg_enable,				\
+	.voltage_bank	= volt_bank,				\
 	.voltage_reg	= volt_reg,				\
 	.voltage_mask	= volt_mask,				\
 	.supported_voltages = voltages,				\
@@ -285,8 +297,8 @@ static struct regulator_ops ab8500_ldo_fixed_ops = {
 	.fixed_uV	= 0,					\
 }
 
-#define AB8500_FIXED_LDO(_id, fixed, reg, reg_mask,	\
-				reg_enable)		\
+#define AB8500_FIXED_LDO(_id, fixed, bank, reg,		\
+			reg_mask, reg_enable)		\
 {							\
 	.desc	= {					\
 		.name	= "LDO-" #_id,			\
@@ -296,6 +308,7 @@ static struct regulator_ops ab8500_ldo_fixed_ops = {
 		.owner	= THIS_MODULE,			\
 	},						\
 	.fixed_uV	= fixed * 1000,			\
+	.update_bank	= bank,				\
 	.update_reg	= reg,				\
 	.mask		= reg_mask,			\
 	.enable		= reg_enable,			\
@@ -304,28 +317,29 @@ static struct regulator_ops ab8500_ldo_fixed_ops = {
 static struct ab8500_regulator_info ab8500_regulator_info[] = {
 	/*
 	 * Variable Voltage LDOs
-	 * name, min uV, max uV, ctrl reg, reg mask, enable mask,
-	 *	volt ctrl reg, volt ctrl mask, volt table, num supported volts
+	 * name, min uV, max uV, ctrl bank, ctrl reg, reg mask, enable mask,
+	 *      volt ctrl bank, volt ctrl reg, volt ctrl mask, volt table,
+	 *      num supported volts
 	 */
-	AB8500_LDO(AUX1, 1100, 3300, 0x0409, 0x3, 0x1, 0x041f, 0xf,
+	AB8500_LDO(AUX1, 1100, 3300, 0x04, 0x09, 0x3, 0x1, 0x04, 0x1f, 0xf,
 			ldo_vauxn_voltages, ARRAY_SIZE(ldo_vauxn_voltages)),
-	AB8500_LDO(AUX2, 1100, 3300, 0x0409, 0xc, 0x4, 0x0420, 0xf,
+	AB8500_LDO(AUX2, 1100, 3300, 0x04, 0x09, 0xc, 0x4, 0x04, 0x20, 0xf,
 			ldo_vauxn_voltages, ARRAY_SIZE(ldo_vauxn_voltages)),
-	AB8500_LDO(AUX3, 1100, 3300, 0x040a, 0x3, 0x1, 0x0421, 0xf,
+	AB8500_LDO(AUX3, 1100, 3300, 0x04, 0x0a, 0x3, 0x1, 0x04, 0x21, 0xf,
 			ldo_vauxn_voltages, ARRAY_SIZE(ldo_vauxn_voltages)),
-	AB8500_LDO(INTCORE, 1100, 3300, 0x0380, 0x4, 0x4, 0x0380, 0x38,
+	AB8500_LDO(INTCORE, 1100, 3300, 0x03, 0x80, 0x4, 0x4, 0x03, 0x80, 0x38,
 		ldo_vintcore_voltages, ARRAY_SIZE(ldo_vintcore_voltages)),
 
 	/*
 	 * Fixed Voltage LDOs
-	 *		 name,	o/p uV, ctrl reg, enable, disable
+	 *		 name,	o/p uV, ctrl bank, ctrl reg, enable, disable
 	 */
-	AB8500_FIXED_LDO(TVOUT,	  2000,   0x0380,   0x2,    0x2),
-	AB8500_FIXED_LDO(AUDIO,   2000,   0x0383,   0x2,    0x2),
-	AB8500_FIXED_LDO(ANAMIC1, 2050,   0x0383,   0x4,    0x4),
-	AB8500_FIXED_LDO(ANAMIC2, 2050,   0x0383,   0x8,    0x8),
-	AB8500_FIXED_LDO(DMIC,    1800,   0x0383,   0x10,   0x10),
-	AB8500_FIXED_LDO(ANA,     1200,   0x0383,   0xc,    0x4),
+	AB8500_FIXED_LDO(TVOUT,	  2000, 0x03,      0x80,     0x2,    0x2),
+	AB8500_FIXED_LDO(AUDIO,   2000, 0x03,      0x83,     0x2,    0x2),
+	AB8500_FIXED_LDO(ANAMIC1, 2050, 0x03,      0x83,     0x4,    0x4),
+	AB8500_FIXED_LDO(ANAMIC2, 2050, 0x03,      0x83,     0x8,    0x8),
+	AB8500_FIXED_LDO(DMIC,    1800, 0x03,      0x83,     0x10,   0x10),
+	AB8500_FIXED_LDO(ANA,     1200, 0x03,      0x83,     0xc,    0x4),
 };
 
 static inline struct ab8500_regulator_info *find_regulator_info(int id)
diff --git a/drivers/rtc/rtc-ab8500.c b/drivers/rtc/rtc-ab8500.c
index 2fda03125e5..e346705aae9 100644
--- a/drivers/rtc/rtc-ab8500.c
+++ b/drivers/rtc/rtc-ab8500.c
@@ -14,26 +14,26 @@
 #include <linux/init.h>
 #include <linux/platform_device.h>
 #include <linux/rtc.h>
+#include <linux/mfd/abx500.h>
 #include <linux/mfd/ab8500.h>
 #include <linux/delay.h>
 
-#define AB8500_RTC_SOFF_STAT_REG	0x0F00
-#define AB8500_RTC_CC_CONF_REG		0x0F01
-#define AB8500_RTC_READ_REQ_REG		0x0F02
-#define AB8500_RTC_WATCH_TSECMID_REG	0x0F03
-#define AB8500_RTC_WATCH_TSECHI_REG	0x0F04
-#define AB8500_RTC_WATCH_TMIN_LOW_REG	0x0F05
-#define AB8500_RTC_WATCH_TMIN_MID_REG	0x0F06
-#define AB8500_RTC_WATCH_TMIN_HI_REG	0x0F07
-#define AB8500_RTC_ALRM_MIN_LOW_REG	0x0F08
-#define AB8500_RTC_ALRM_MIN_MID_REG	0x0F09
-#define AB8500_RTC_ALRM_MIN_HI_REG	0x0F0A
-#define AB8500_RTC_STAT_REG		0x0F0B
-#define AB8500_RTC_BKUP_CHG_REG		0x0F0C
-#define AB8500_RTC_FORCE_BKUP_REG	0x0F0D
-#define AB8500_RTC_CALIB_REG		0x0F0E
-#define AB8500_RTC_SWITCH_STAT_REG	0x0F0F
-#define AB8500_REV_REG			0x1080
+#define AB8500_RTC_SOFF_STAT_REG	0x00
+#define AB8500_RTC_CC_CONF_REG		0x01
+#define AB8500_RTC_READ_REQ_REG		0x02
+#define AB8500_RTC_WATCH_TSECMID_REG	0x03
+#define AB8500_RTC_WATCH_TSECHI_REG	0x04
+#define AB8500_RTC_WATCH_TMIN_LOW_REG	0x05
+#define AB8500_RTC_WATCH_TMIN_MID_REG	0x06
+#define AB8500_RTC_WATCH_TMIN_HI_REG	0x07
+#define AB8500_RTC_ALRM_MIN_LOW_REG	0x08
+#define AB8500_RTC_ALRM_MIN_MID_REG	0x09
+#define AB8500_RTC_ALRM_MIN_HI_REG	0x0A
+#define AB8500_RTC_STAT_REG		0x0B
+#define AB8500_RTC_BKUP_CHG_REG		0x0C
+#define AB8500_RTC_FORCE_BKUP_REG	0x0D
+#define AB8500_RTC_CALIB_REG		0x0E
+#define AB8500_RTC_SWITCH_STAT_REG	0x0F
 
 /* RtcReadRequest bits */
 #define RTC_READ_REQUEST		0x01
@@ -46,13 +46,13 @@
 #define COUNTS_PER_SEC			(0xF000 / 60)
 #define AB8500_RTC_EPOCH		2000
 
-static const unsigned long ab8500_rtc_time_regs[] = {
+static const u8 ab8500_rtc_time_regs[] = {
 	AB8500_RTC_WATCH_TMIN_HI_REG, AB8500_RTC_WATCH_TMIN_MID_REG,
 	AB8500_RTC_WATCH_TMIN_LOW_REG, AB8500_RTC_WATCH_TSECHI_REG,
 	AB8500_RTC_WATCH_TSECMID_REG
 };
 
-static const unsigned long ab8500_rtc_alarm_regs[] = {
+static const u8 ab8500_rtc_alarm_regs[] = {
 	AB8500_RTC_ALRM_MIN_HI_REG, AB8500_RTC_ALRM_MIN_MID_REG,
 	AB8500_RTC_ALRM_MIN_LOW_REG
 };
@@ -76,29 +76,30 @@ static unsigned long get_elapsed_seconds(int year)
 
 static int ab8500_rtc_read_time(struct device *dev, struct rtc_time *tm)
 {
-	struct ab8500 *ab8500 = dev_get_drvdata(dev->parent);
 	unsigned long timeout = jiffies + HZ;
 	int retval, i;
 	unsigned long mins, secs;
 	unsigned char buf[ARRAY_SIZE(ab8500_rtc_time_regs)];
+	u8 value;
 
 	/* Request a data read */
-	retval = ab8500_write(ab8500, AB8500_RTC_READ_REQ_REG,
-			      RTC_READ_REQUEST);
+	retval = abx500_set_register_interruptible(dev,
+		AB8500_RTC, AB8500_RTC_READ_REQ_REG, RTC_READ_REQUEST);
 	if (retval < 0)
 		return retval;
 
 	/* Early AB8500 chips will not clear the rtc read request bit */
-	if (ab8500->revision == 0) {
+	if (abx500_get_chip_id(dev) == 0) {
 		msleep(1);
 	} else {
 		/* Wait for some cycles after enabling the rtc read in ab8500 */
 		while (time_before(jiffies, timeout)) {
-			retval = ab8500_read(ab8500, AB8500_RTC_READ_REQ_REG);
+			retval = abx500_get_register_interruptible(dev,
+				AB8500_RTC, AB8500_RTC_READ_REQ_REG, &value);
 			if (retval < 0)
 				return retval;
 
-			if (!(retval & RTC_READ_REQUEST))
+			if (!(value & RTC_READ_REQUEST))
 				break;
 
 			msleep(1);
@@ -107,10 +108,11 @@ static int ab8500_rtc_read_time(struct device *dev, struct rtc_time *tm)
 
 	/* Read the Watchtime registers */
 	for (i = 0; i < ARRAY_SIZE(ab8500_rtc_time_regs); i++) {
-		retval = ab8500_read(ab8500, ab8500_rtc_time_regs[i]);
+		retval = abx500_get_register_interruptible(dev,
+			AB8500_RTC, ab8500_rtc_time_regs[i], &value);
 		if (retval < 0)
 			return retval;
-		buf[i] = retval;
+		buf[i] = value;
 	}
 
 	mins = (buf[0] << 16) | (buf[1] << 8) | buf[2];
@@ -128,7 +130,6 @@ static int ab8500_rtc_read_time(struct device *dev, struct rtc_time *tm)
 
 static int ab8500_rtc_set_time(struct device *dev, struct rtc_time *tm)
 {
-	struct ab8500 *ab8500 = dev_get_drvdata(dev->parent);
 	int retval, i;
 	unsigned char buf[ARRAY_SIZE(ab8500_rtc_time_regs)];
 	unsigned long no_secs, no_mins, secs = 0;
@@ -162,27 +163,29 @@ static int ab8500_rtc_set_time(struct device *dev, struct rtc_time *tm)
 	buf[0] = (no_mins >> 16) & 0xFF;
 
 	for (i = 0; i < ARRAY_SIZE(ab8500_rtc_time_regs); i++) {
-		retval = ab8500_write(ab8500, ab8500_rtc_time_regs[i], buf[i]);
+		retval = abx500_set_register_interruptible(dev, AB8500_RTC,
+			ab8500_rtc_time_regs[i], buf[i]);
 		if (retval < 0)
 			return retval;
 	}
 
 	/* Request a data write */
-	return ab8500_write(ab8500, AB8500_RTC_READ_REQ_REG, RTC_WRITE_REQUEST);
+	return abx500_set_register_interruptible(dev, AB8500_RTC,
+		AB8500_RTC_READ_REQ_REG, RTC_WRITE_REQUEST);
 }
 
 static int ab8500_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alarm)
 {
-	struct ab8500 *ab8500 = dev_get_drvdata(dev->parent);
 	int retval, i;
-	int rtc_ctrl;
+	u8 rtc_ctrl, value;
 	unsigned char buf[ARRAY_SIZE(ab8500_rtc_alarm_regs)];
 	unsigned long secs, mins;
 
 	/* Check if the alarm is enabled or not */
-	rtc_ctrl = ab8500_read(ab8500, AB8500_RTC_STAT_REG);
-	if (rtc_ctrl < 0)
-		return rtc_ctrl;
+	retval = abx500_get_register_interruptible(dev, AB8500_RTC,
+		AB8500_RTC_STAT_REG, &rtc_ctrl);
+	if (retval < 0)
+		return retval;
 
 	if (rtc_ctrl & RTC_ALARM_ENA)
 		alarm->enabled = 1;
@@ -192,10 +195,11 @@ static int ab8500_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alarm)
 	alarm->pending = 0;
 
 	for (i = 0; i < ARRAY_SIZE(ab8500_rtc_alarm_regs); i++) {
-		retval = ab8500_read(ab8500, ab8500_rtc_alarm_regs[i]);
+		retval = abx500_get_register_interruptible(dev, AB8500_RTC,
+			ab8500_rtc_alarm_regs[i], &value);
 		if (retval < 0)
 			return retval;
-		buf[i] = retval;
+		buf[i] = value;
 	}
 
 	mins = (buf[0] << 16) | (buf[1] << 8) | (buf[2]);
@@ -211,15 +215,13 @@ static int ab8500_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alarm)
 
 static int ab8500_rtc_irq_enable(struct device *dev, unsigned int enabled)
 {
-	struct ab8500 *ab8500 = dev_get_drvdata(dev->parent);
-
-	return ab8500_set_bits(ab8500, AB8500_RTC_STAT_REG, RTC_ALARM_ENA,
-			       enabled ? RTC_ALARM_ENA : 0);
+	return abx500_mask_and_set_register_interruptible(dev, AB8500_RTC,
+		AB8500_RTC_STAT_REG, RTC_ALARM_ENA,
+		enabled ? RTC_ALARM_ENA : 0);
 }
 
 static int ab8500_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alarm)
 {
-	struct ab8500 *ab8500 = dev_get_drvdata(dev->parent);
 	int retval, i;
 	unsigned char buf[ARRAY_SIZE(ab8500_rtc_alarm_regs)];
 	unsigned long mins, secs = 0;
@@ -247,7 +249,8 @@ static int ab8500_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alarm)
 
 	/* Set the alarm time */
 	for (i = 0; i < ARRAY_SIZE(ab8500_rtc_alarm_regs); i++) {
-		retval = ab8500_write(ab8500, ab8500_rtc_alarm_regs[i], buf[i]);
+		retval = abx500_set_register_interruptible(dev, AB8500_RTC,
+			ab8500_rtc_alarm_regs[i], buf[i]);
 		if (retval < 0)
 			return retval;
 	}
@@ -276,10 +279,9 @@ static const struct rtc_class_ops ab8500_rtc_ops = {
 
 static int __devinit ab8500_rtc_probe(struct platform_device *pdev)
 {
-	struct ab8500 *ab8500 = dev_get_drvdata(pdev->dev.parent);
 	int err;
 	struct rtc_device *rtc;
-	int rtc_ctrl;
+	u8 rtc_ctrl;
 	int irq;
 
 	irq = platform_get_irq_byname(pdev, "ALARM");
@@ -287,17 +289,18 @@ static int __devinit ab8500_rtc_probe(struct platform_device *pdev)
 		return irq;
 
 	/* For RTC supply test */
-	err = ab8500_set_bits(ab8500, AB8500_RTC_STAT_REG, RTC_STATUS_DATA,
-			RTC_STATUS_DATA);
+	err = abx500_mask_and_set_register_interruptible(&pdev->dev, AB8500_RTC,
+		AB8500_RTC_STAT_REG, RTC_STATUS_DATA, RTC_STATUS_DATA);
 	if (err < 0)
 		return err;
 
 	/* Wait for reset by the PorRtc */
 	msleep(1);
 
-	rtc_ctrl = ab8500_read(ab8500, AB8500_RTC_STAT_REG);
-	if (rtc_ctrl < 0)
-		return rtc_ctrl;
+	err = abx500_get_register_interruptible(&pdev->dev, AB8500_RTC,
+		AB8500_RTC_STAT_REG, &rtc_ctrl);
+	if (err < 0)
+		return err;
 
 	/* Check if the RTC Supply fails */
 	if (!(rtc_ctrl & RTC_STATUS_DATA)) {
diff --git a/include/linux/mfd/ab8500.h b/include/linux/mfd/ab8500.h
index f5cec4500f3..d63b6050b18 100644
--- a/include/linux/mfd/ab8500.h
+++ b/include/linux/mfd/ab8500.h
@@ -10,6 +10,29 @@
 #include <linux/device.h>
 
 /*
+ * AB8500 bank addresses
+ */
+#define AB8500_SYS_CTRL1_BLOCK	0x1
+#define AB8500_SYS_CTRL2_BLOCK	0x2
+#define AB8500_REGU_CTRL1	0x3
+#define AB8500_REGU_CTRL2	0x4
+#define AB8500_USB		0x5
+#define AB8500_TVOUT		0x6
+#define AB8500_DBI		0x7
+#define AB8500_ECI_AV_ACC	0x8
+#define AB8500_RESERVED		0x9
+#define AB8500_GPADC		0xA
+#define AB8500_CHARGER		0xB
+#define AB8500_GAS_GAUGE	0xC
+#define AB8500_AUDIO		0xD
+#define AB8500_INTERRUPT	0xE
+#define AB8500_RTC		0xF
+#define AB8500_MISC		0x10
+#define AB8500_DEBUG		0x12
+#define AB8500_PROD_TEST	0x13
+#define AB8500_OTP_EMUL		0x15
+
+/*
  * Interrupts
  */
 
@@ -99,6 +122,7 @@ struct ab8500 {
 	int		revision;
 	int		irq_base;
 	int		irq;
+	u8		chip_id;
 
 	int (*write) (struct ab8500 *a8500, u16 addr, u8 data);
 	int (*read) (struct ab8500 *a8500, u16 addr);
@@ -124,10 +148,6 @@ struct ab8500_platform_data {
 	struct regulator_init_data *regulator[AB8500_NUM_REGULATORS];
 };
 
-extern int ab8500_write(struct ab8500 *a8500, u16 addr, u8 data);
-extern int ab8500_read(struct ab8500 *a8500, u16 addr);
-extern int ab8500_set_bits(struct ab8500 *a8500, u16 addr, u8 mask, u8 data);
-
 extern int __devinit ab8500_init(struct ab8500 *ab8500);
 extern int __devexit ab8500_exit(struct ab8500 *ab8500);
 
diff --git a/include/linux/mfd/abx500.h b/include/linux/mfd/abx500.h
index 390726fcbcb..be7373c79be 100644
--- a/include/linux/mfd/abx500.h
+++ b/include/linux/mfd/abx500.h
@@ -6,8 +6,7 @@
  *
  * ABX500 core access functions.
  * The abx500 interface is used for the Analog Baseband chip
- * ab3100, ab3550, ab5500 and possibly comming. It is not used for
- * ab4500 and ab8500 since they are another family of chip.
+ * ab3100, ab3550, ab5500, and ab8500.
  *
  * Author: Mattias Wallin <mattias.wallin@stericsson.com>
  * Author: Mattias Nilsson <mattias.i.nilsson@stericsson.com>