Adding upstream version 4.19.249.upstream/4.19.249

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1352 insertions, 0 deletions

diff --git a/drivers/mfd/ab8500-core.c b/drivers/mfd/ab8500-core.c
new file mode 100644
index 000000000..f0527e769
--- /dev/null
+++ b/drivers/mfd/ab8500-core.c
@@ -0,0 +1,1352 @@
+/*
+ * Copyright (C) ST-Ericsson SA 2010
+ *
+ * License Terms: GNU General Public License v2
+ * Author: Srinidhi Kasagar <srinidhi.kasagar@stericsson.com>
+ * Author: Rabin Vincent <rabin.vincent@stericsson.com>
+ * Author: Mattias Wallin <mattias.wallin@stericsson.com>
+ */
+
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/init.h>
+#include <linux/irq.h>
+#include <linux/irqdomain.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/moduleparam.h>
+#include <linux/platform_device.h>
+#include <linux/mfd/core.h>
+#include <linux/mfd/abx500.h>
+#include <linux/mfd/abx500/ab8500.h>
+#include <linux/mfd/abx500/ab8500-bm.h>
+#include <linux/mfd/dbx500-prcmu.h>
+#include <linux/regulator/ab8500.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+
+/*
+ * Interrupt register offsets
+ * Bank : 0x0E
+ */
+#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 AB9540_IT_SOURCE13_REG		0x0C
+#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		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_LATCH12_REG		0x2B
+#define AB9540_IT_LATCH13_REG		0x2C
+#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		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_IT_MASK25_REG		0x58
+
+/*
+ * latch hierarchy registers
+ */
+#define AB8500_IT_LATCHHIER1_REG	0x60
+#define AB8500_IT_LATCHHIER2_REG	0x61
+#define AB8500_IT_LATCHHIER3_REG	0x62
+#define AB8540_IT_LATCHHIER4_REG	0x63
+
+#define AB8500_IT_LATCHHIER_NUM		3
+#define AB8540_IT_LATCHHIER_NUM		4
+
+#define AB8500_REV_REG			0x80
+#define AB8500_IC_NAME_REG		0x82
+#define AB8500_SWITCH_OFF_STATUS	0x00
+
+#define AB8500_TURN_ON_STATUS		0x00
+#define AB8505_TURN_ON_STATUS_2		0x04
+
+#define AB8500_CH_USBCH_STAT1_REG	0x02
+#define VBUS_DET_DBNC100		0x02
+#define VBUS_DET_DBNC1			0x01
+
+static DEFINE_SPINLOCK(on_stat_lock);
+static u8 turn_on_stat_mask = 0xFF;
+static u8 turn_on_stat_set;
+static bool no_bm; /* No battery management */
+/*
+ * not really modular, but the easiest way to keep compat with existing
+ * bootargs behaviour is to continue using module_param here.
+ */
+module_param(no_bm, bool, S_IRUGO);
+
+#define AB9540_MODEM_CTRL2_REG			0x23
+#define AB9540_MODEM_CTRL2_SWDBBRSTN_BIT	BIT(2)
+
+/*
+ * Map interrupt numbers to the LATCH and MASK register offsets, Interrupt
+ * numbers are indexed into this array with (num / 8). The interupts are
+ * defined in linux/mfd/ab8500.h
+ *
+ * This is one off from the register names, i.e. AB8500_IT_MASK1_REG is at
+ * offset 0.
+ */
+/* AB8500 support */
+static const int ab8500_irq_regoffset[AB8500_NUM_IRQ_REGS] = {
+	0, 1, 2, 3, 4, 6, 7, 8, 9, 11, 18, 19, 20, 21,
+};
+
+/* AB9540 / AB8505 support */
+static const int ab9540_irq_regoffset[AB9540_NUM_IRQ_REGS] = {
+	0, 1, 2, 3, 4, 6, 7, 8, 9, 11, 18, 19, 20, 21, 12, 13, 24, 5, 22, 23
+};
+
+/* AB8540 support */
+static const int ab8540_irq_regoffset[AB8540_NUM_IRQ_REGS] = {
+	0, 1, 2, 3, 4, -1, -1, -1, -1, 11, 18, 19, 20, 21, 12, 13, 24, 5, 22,
+	23, 25, 26, 27, 28, 29, 30, 31,
+};
+
+static const char ab8500_version_str[][7] = {
+	[AB8500_VERSION_AB8500] = "AB8500",
+	[AB8500_VERSION_AB8505] = "AB8505",
+	[AB8500_VERSION_AB9540] = "AB9540",
+	[AB8500_VERSION_AB8540] = "AB8540",
+};
+
+static int ab8500_prcmu_write(struct ab8500 *ab8500, u16 addr, u8 data)
+{
+	int ret;
+
+	ret = prcmu_abb_write((u8)(addr >> 8), (u8)(addr & 0xFF), &data, 1);
+	if (ret < 0)
+		dev_err(ab8500->dev, "prcmu i2c error %d\n", ret);
+	return ret;
+}
+
+static int ab8500_prcmu_write_masked(struct ab8500 *ab8500, u16 addr, u8 mask,
+	u8 data)
+{
+	int ret;
+
+	ret = prcmu_abb_write_masked((u8)(addr >> 8), (u8)(addr & 0xFF), &data,
+		&mask, 1);
+	if (ret < 0)
+		dev_err(ab8500->dev, "prcmu i2c error %d\n", ret);
+	return ret;
+}
+
+static int ab8500_prcmu_read(struct ab8500 *ab8500, u16 addr)
+{
+	int ret;
+	u8 data;
+
+	ret = prcmu_abb_read((u8)(addr >> 8), (u8)(addr & 0xFF), &data, 1);
+	if (ret < 0) {
+		dev_err(ab8500->dev, "prcmu i2c error %d\n", ret);
+		return ret;
+	}
+	return (int)data;
+}
+
+static int ab8500_get_chip_id(struct device *dev)
+{
+	struct ab8500 *ab8500;
+
+	if (!dev)
+		return -EINVAL;
+	ab8500 = dev_get_drvdata(dev->parent);
+	return ab8500 ? (int)ab8500->chip_id : -EINVAL;
+}
+
+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);
+
+	mutex_lock(&ab8500->lock);
+
+	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;
+}
+
+static int ab8500_set_register(struct device *dev, u8 bank,
+	u8 reg, u8 value)
+{
+	int ret;
+	struct ab8500 *ab8500 = dev_get_drvdata(dev->parent);
+
+	atomic_inc(&ab8500->transfer_ongoing);
+	ret = set_register_interruptible(ab8500, bank, reg, value);
+	atomic_dec(&ab8500->transfer_ongoing);
+	return ret;
+}
+
+static int get_register_interruptible(struct ab8500 *ab8500, u8 bank,
+	u8 reg, u8 *value)
+{
+	int ret;
+	u16 addr = ((u16)bank) << 8 | reg;
+
+	mutex_lock(&ab8500->lock);
+
+	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 < 0) ? ret : 0;
+}
+
+static int ab8500_get_register(struct device *dev, u8 bank,
+	u8 reg, u8 *value)
+{
+	int ret;
+	struct ab8500 *ab8500 = dev_get_drvdata(dev->parent);
+
+	atomic_inc(&ab8500->transfer_ongoing);
+	ret = get_register_interruptible(ab8500, bank, reg, value);
+	atomic_dec(&ab8500->transfer_ongoing);
+	return ret;
+}
+
+static int mask_and_set_register_interruptible(struct ab8500 *ab8500, u8 bank,
+	u8 reg, u8 bitmask, u8 bitvalues)
+{
+	int ret;
+	u16 addr = ((u16)bank) << 8 | reg;
+
+	mutex_lock(&ab8500->lock);
+
+	if (ab8500->write_masked == NULL) {
+		u8 data;
+
+		ret = ab8500->read(ab8500, addr);
+		if (ret < 0) {
+			dev_err(ab8500->dev, "failed to read reg %#x: %d\n",
+				addr, ret);
+			goto out;
+		}
+
+		data = (u8)ret;
+		data = (~bitmask & data) | (bitmask & bitvalues);
+
+		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);
+		goto out;
+	}
+	ret = ab8500->write_masked(ab8500, addr, bitmask, bitvalues);
+	if (ret < 0)
+		dev_err(ab8500->dev, "failed to modify reg %#x: %d\n", addr,
+			ret);
+out:
+	mutex_unlock(&ab8500->lock);
+	return ret;
+}
+
+static int ab8500_mask_and_set_register(struct device *dev,
+	u8 bank, u8 reg, u8 bitmask, u8 bitvalues)
+{
+	int ret;
+	struct ab8500 *ab8500 = dev_get_drvdata(dev->parent);
+
+	atomic_inc(&ab8500->transfer_ongoing);
+	ret = mask_and_set_register_interruptible(ab8500, bank, reg,
+						 bitmask, bitvalues);
+	atomic_dec(&ab8500->transfer_ongoing);
+	return ret;
+}
+
+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,
+	.dump_all_banks = ab8500_dump_all_banks,
+};
+
+static void ab8500_irq_lock(struct irq_data *data)
+{
+	struct ab8500 *ab8500 = irq_data_get_irq_chip_data(data);
+
+	mutex_lock(&ab8500->irq_lock);
+	atomic_inc(&ab8500->transfer_ongoing);
+}
+
+static void ab8500_irq_sync_unlock(struct irq_data *data)
+{
+	struct ab8500 *ab8500 = irq_data_get_irq_chip_data(data);
+	int i;
+
+	for (i = 0; i < ab8500->mask_size; i++) {
+		u8 old = ab8500->oldmask[i];
+		u8 new = ab8500->mask[i];
+		int reg;
+
+		if (new == old)
+			continue;
+
+		/*
+		 * Interrupt register 12 doesn't exist prior to AB8500 version
+		 * 2.0
+		 */
+		if (ab8500->irq_reg_offset[i] == 11 &&
+			is_ab8500_1p1_or_earlier(ab8500))
+			continue;
+
+		if (ab8500->irq_reg_offset[i] < 0)
+			continue;
+
+		ab8500->oldmask[i] = new;
+
+		reg = AB8500_IT_MASK1_REG + ab8500->irq_reg_offset[i];
+		set_register_interruptible(ab8500, AB8500_INTERRUPT, reg, new);
+	}
+	atomic_dec(&ab8500->transfer_ongoing);
+	mutex_unlock(&ab8500->irq_lock);
+}
+
+static void ab8500_irq_mask(struct irq_data *data)
+{
+	struct ab8500 *ab8500 = irq_data_get_irq_chip_data(data);
+	int offset = data->hwirq;
+	int index = offset / 8;
+	int mask = 1 << (offset % 8);
+
+	ab8500->mask[index] |= mask;
+
+	/* The AB8500 GPIOs have two interrupts each (rising & falling). */
+	if (offset >= AB8500_INT_GPIO6R && offset <= AB8500_INT_GPIO41R)
+		ab8500->mask[index + 2] |= mask;
+	if (offset >= AB9540_INT_GPIO50R && offset <= AB9540_INT_GPIO54R)
+		ab8500->mask[index + 1] |= mask;
+	if (offset == AB8540_INT_GPIO43R || offset == AB8540_INT_GPIO44R)
+		/* Here the falling IRQ is one bit lower */
+		ab8500->mask[index] |= (mask << 1);
+}
+
+static void ab8500_irq_unmask(struct irq_data *data)
+{
+	struct ab8500 *ab8500 = irq_data_get_irq_chip_data(data);
+	unsigned int type = irqd_get_trigger_type(data);
+	int offset = data->hwirq;
+	int index = offset / 8;
+	int mask = 1 << (offset % 8);
+
+	if (type & IRQ_TYPE_EDGE_RISING)
+		ab8500->mask[index] &= ~mask;
+
+	/* The AB8500 GPIOs have two interrupts each (rising & falling). */
+	if (type & IRQ_TYPE_EDGE_FALLING) {
+		if (offset >= AB8500_INT_GPIO6R && offset <= AB8500_INT_GPIO41R)
+			ab8500->mask[index + 2] &= ~mask;
+		else if (offset >= AB9540_INT_GPIO50R &&
+			 offset <= AB9540_INT_GPIO54R)
+			ab8500->mask[index + 1] &= ~mask;
+		else if (offset == AB8540_INT_GPIO43R ||
+			 offset == AB8540_INT_GPIO44R)
+			/* Here the falling IRQ is one bit lower */
+			ab8500->mask[index] &= ~(mask << 1);
+		else
+			ab8500->mask[index] &= ~mask;
+	} else {
+		/* Satisfies the case where type is not set. */
+		ab8500->mask[index] &= ~mask;
+	}
+}
+
+static int ab8500_irq_set_type(struct irq_data *data, unsigned int type)
+{
+	return 0;
+}
+
+static struct irq_chip ab8500_irq_chip = {
+	.name			= "ab8500",
+	.irq_bus_lock		= ab8500_irq_lock,
+	.irq_bus_sync_unlock	= ab8500_irq_sync_unlock,
+	.irq_mask		= ab8500_irq_mask,
+	.irq_disable		= ab8500_irq_mask,
+	.irq_unmask		= ab8500_irq_unmask,
+	.irq_set_type		= ab8500_irq_set_type,
+};
+
+static void update_latch_offset(u8 *offset, int i)
+{
+	/* Fix inconsistent ITFromLatch25 bit mapping... */
+	if (unlikely(*offset == 17))
+		*offset = 24;
+	/* Fix inconsistent ab8540 bit mapping... */
+	if (unlikely(*offset == 16))
+		*offset = 25;
+	if ((i == 3) && (*offset >= 24))
+		*offset += 2;
+}
+
+static int ab8500_handle_hierarchical_line(struct ab8500 *ab8500,
+					int latch_offset, u8 latch_val)
+{
+	int int_bit, line, i;
+
+	for (i = 0; i < ab8500->mask_size; i++)
+		if (ab8500->irq_reg_offset[i] == latch_offset)
+			break;
+
+	if (i >= ab8500->mask_size) {
+		dev_err(ab8500->dev, "Register offset 0x%2x not declared\n",
+				latch_offset);
+		return -ENXIO;
+	}
+
+	/* ignore masked out interrupts */
+	latch_val &= ~ab8500->mask[i];
+
+	while (latch_val) {
+		int_bit = __ffs(latch_val);
+		line = (i << 3) + int_bit;
+		latch_val &= ~(1 << int_bit);
+
+		/*
+		 * This handles the falling edge hwirqs from the GPIO
+		 * lines. Route them back to the line registered for the
+		 * rising IRQ, as this is merely a flag for the same IRQ
+		 * in linux terms.
+		 */
+		if (line >= AB8500_INT_GPIO6F && line <= AB8500_INT_GPIO41F)
+			line -= 16;
+		if (line >= AB9540_INT_GPIO50F && line <= AB9540_INT_GPIO54F)
+			line -= 8;
+		if (line == AB8540_INT_GPIO43F || line == AB8540_INT_GPIO44F)
+			line += 1;
+
+		handle_nested_irq(irq_find_mapping(ab8500->domain, line));
+	}
+
+	return 0;
+}
+
+static int ab8500_handle_hierarchical_latch(struct ab8500 *ab8500,
+					int hier_offset, u8 hier_val)
+{
+	int latch_bit, status;
+	u8 latch_offset, latch_val;
+
+	do {
+		latch_bit = __ffs(hier_val);
+		latch_offset = (hier_offset << 3) + latch_bit;
+
+		update_latch_offset(&latch_offset, hier_offset);
+
+		status = get_register_interruptible(ab8500,
+				AB8500_INTERRUPT,
+				AB8500_IT_LATCH1_REG + latch_offset,
+				&latch_val);
+		if (status < 0 || latch_val == 0)
+			goto discard;
+
+		status = ab8500_handle_hierarchical_line(ab8500,
+				latch_offset, latch_val);
+		if (status < 0)
+			return status;
+discard:
+		hier_val &= ~(1 << latch_bit);
+	} while (hier_val);
+
+	return 0;
+}
+
+static irqreturn_t ab8500_hierarchical_irq(int irq, void *dev)
+{
+	struct ab8500 *ab8500 = dev;
+	u8 i;
+
+	dev_vdbg(ab8500->dev, "interrupt\n");
+
+	/*  Hierarchical interrupt version */
+	for (i = 0; i < (ab8500->it_latchhier_num); i++) {
+		int status;
+		u8 hier_val;
+
+		status = get_register_interruptible(ab8500, AB8500_INTERRUPT,
+			AB8500_IT_LATCHHIER1_REG + i, &hier_val);
+		if (status < 0 || hier_val == 0)
+			continue;
+
+		status = ab8500_handle_hierarchical_latch(ab8500, i, hier_val);
+		if (status < 0)
+			break;
+	}
+	return IRQ_HANDLED;
+}
+
+static int ab8500_irq_map(struct irq_domain *d, unsigned int virq,
+				irq_hw_number_t hwirq)
+{
+	struct ab8500 *ab8500 = d->host_data;
+
+	if (!ab8500)
+		return -EINVAL;
+
+	irq_set_chip_data(virq, ab8500);
+	irq_set_chip_and_handler(virq, &ab8500_irq_chip,
+				handle_simple_irq);
+	irq_set_nested_thread(virq, 1);
+	irq_set_noprobe(virq);
+
+	return 0;
+}
+
+static const struct irq_domain_ops ab8500_irq_ops = {
+	.map    = ab8500_irq_map,
+	.xlate  = irq_domain_xlate_twocell,
+};
+
+static int ab8500_irq_init(struct ab8500 *ab8500, struct device_node *np)
+{
+	int num_irqs;
+
+	if (is_ab8540(ab8500))
+		num_irqs = AB8540_NR_IRQS;
+	else if (is_ab9540(ab8500))
+		num_irqs = AB9540_NR_IRQS;
+	else if (is_ab8505(ab8500))
+		num_irqs = AB8505_NR_IRQS;
+	else
+		num_irqs = AB8500_NR_IRQS;
+
+	/* If ->irq_base is zero this will give a linear mapping */
+	ab8500->domain = irq_domain_add_simple(ab8500->dev->of_node,
+					       num_irqs, 0,
+					       &ab8500_irq_ops, ab8500);
+
+	if (!ab8500->domain) {
+		dev_err(ab8500->dev, "Failed to create irqdomain\n");
+		return -ENODEV;
+	}
+
+	return 0;
+}
+
+int ab8500_suspend(struct ab8500 *ab8500)
+{
+	if (atomic_read(&ab8500->transfer_ongoing))
+		return -EINVAL;
+
+	return 0;
+}
+
+static const struct mfd_cell ab8500_bm_devs[] = {
+	{
+		.name = "ab8500-charger",
+		.of_compatible = "stericsson,ab8500-charger",
+		.platform_data = &ab8500_bm_data,
+		.pdata_size = sizeof(ab8500_bm_data),
+	},
+	{
+		.name = "ab8500-btemp",
+		.of_compatible = "stericsson,ab8500-btemp",
+		.platform_data = &ab8500_bm_data,
+		.pdata_size = sizeof(ab8500_bm_data),
+	},
+	{
+		.name = "ab8500-fg",
+		.of_compatible = "stericsson,ab8500-fg",
+		.platform_data = &ab8500_bm_data,
+		.pdata_size = sizeof(ab8500_bm_data),
+	},
+	{
+		.name = "ab8500-chargalg",
+		.of_compatible = "stericsson,ab8500-chargalg",
+		.platform_data = &ab8500_bm_data,
+		.pdata_size = sizeof(ab8500_bm_data),
+	},
+};
+
+static const struct mfd_cell ab8500_devs[] = {
+#ifdef CONFIG_DEBUG_FS
+	{
+		.name = "ab8500-debug",
+		.of_compatible = "stericsson,ab8500-debug",
+	},
+#endif
+	{
+		.name = "ab8500-sysctrl",
+		.of_compatible = "stericsson,ab8500-sysctrl",
+	},
+	{
+		.name = "ab8500-ext-regulator",
+		.of_compatible = "stericsson,ab8500-ext-regulator",
+	},
+	{
+		.name = "ab8500-regulator",
+		.of_compatible = "stericsson,ab8500-regulator",
+	},
+	{
+		.name = "ab8500-clk",
+		.of_compatible = "stericsson,ab8500-clk",
+	},
+	{
+		.name = "ab8500-gpadc",
+		.of_compatible = "stericsson,ab8500-gpadc",
+	},
+	{
+		.name = "ab8500-rtc",
+		.of_compatible = "stericsson,ab8500-rtc",
+	},
+	{
+		.name = "ab8500-acc-det",
+		.of_compatible = "stericsson,ab8500-acc-det",
+	},
+	{
+
+		.name = "ab8500-poweron-key",
+		.of_compatible = "stericsson,ab8500-poweron-key",
+	},
+	{
+		.name = "ab8500-pwm",
+		.of_compatible = "stericsson,ab8500-pwm",
+		.id = 1,
+	},
+	{
+		.name = "ab8500-pwm",
+		.of_compatible = "stericsson,ab8500-pwm",
+		.id = 2,
+	},
+	{
+		.name = "ab8500-pwm",
+		.of_compatible = "stericsson,ab8500-pwm",
+		.id = 3,
+	},
+	{
+		.name = "ab8500-denc",
+		.of_compatible = "stericsson,ab8500-denc",
+	},
+	{
+		.name = "pinctrl-ab8500",
+		.of_compatible = "stericsson,ab8500-gpio",
+	},
+	{
+		.name = "abx500-temp",
+		.of_compatible = "stericsson,abx500-temp",
+	},
+	{
+		.name = "ab8500-usb",
+		.of_compatible = "stericsson,ab8500-usb",
+	},
+	{
+		.name = "ab8500-codec",
+		.of_compatible = "stericsson,ab8500-codec",
+	},
+};
+
+static const struct mfd_cell ab9540_devs[] = {
+#ifdef CONFIG_DEBUG_FS
+	{
+		.name = "ab8500-debug",
+	},
+#endif
+	{
+		.name = "ab8500-sysctrl",
+	},
+	{
+		.name = "ab8500-ext-regulator",
+	},
+	{
+		.name = "ab8500-regulator",
+	},
+	{
+		.name = "abx500-clk",
+		.of_compatible = "stericsson,abx500-clk",
+	},
+	{
+		.name = "ab8500-gpadc",
+		.of_compatible = "stericsson,ab8500-gpadc",
+	},
+	{
+		.name = "ab8500-rtc",
+	},
+	{
+		.name = "ab8500-acc-det",
+	},
+	{
+		.name = "ab8500-poweron-key",
+	},
+	{
+		.name = "ab8500-pwm",
+		.id = 1,
+	},
+	{
+		.name = "abx500-temp",
+	},
+	{
+		.name = "pinctrl-ab9540",
+		.of_compatible = "stericsson,ab9540-gpio",
+	},
+	{
+		.name = "ab9540-usb",
+	},
+	{
+		.name = "ab9540-codec",
+	},
+	{
+		.name = "ab-iddet",
+	},
+};
+
+/* Device list for ab8505  */
+static const struct mfd_cell ab8505_devs[] = {
+#ifdef CONFIG_DEBUG_FS
+	{
+		.name = "ab8500-debug",
+	},
+#endif
+	{
+		.name = "ab8500-sysctrl",
+	},
+	{
+		.name = "ab8500-regulator",
+	},
+	{
+		.name = "abx500-clk",
+		.of_compatible = "stericsson,abx500-clk",
+	},
+	{
+		.name = "ab8500-gpadc",
+		.of_compatible = "stericsson,ab8500-gpadc",
+	},
+	{
+		.name = "ab8500-rtc",
+	},
+	{
+		.name = "ab8500-acc-det",
+	},
+	{
+		.name = "ab8500-poweron-key",
+	},
+	{
+		.name = "ab8500-pwm",
+		.id = 1,
+	},
+	{
+		.name = "pinctrl-ab8505",
+	},
+	{
+		.name = "ab8500-usb",
+	},
+	{
+		.name = "ab8500-codec",
+	},
+	{
+		.name = "ab-iddet",
+	},
+};
+
+static const struct mfd_cell ab8540_devs[] = {
+#ifdef CONFIG_DEBUG_FS
+	{
+		.name = "ab8500-debug",
+	},
+#endif
+	{
+		.name = "ab8500-sysctrl",
+	},
+	{
+		.name = "ab8500-ext-regulator",
+	},
+	{
+		.name = "ab8500-regulator",
+	},
+	{
+		.name = "abx500-clk",
+		.of_compatible = "stericsson,abx500-clk",
+	},
+	{
+		.name = "ab8500-gpadc",
+		.of_compatible = "stericsson,ab8500-gpadc",
+	},
+	{
+		.name = "ab8500-acc-det",
+	},
+	{
+		.name = "ab8500-poweron-key",
+	},
+	{
+		.name = "ab8500-pwm",
+		.id = 1,
+	},
+	{
+		.name = "abx500-temp",
+	},
+	{
+		.name = "pinctrl-ab8540",
+	},
+	{
+		.name = "ab8540-usb",
+	},
+	{
+		.name = "ab8540-codec",
+	},
+	{
+		.name = "ab-iddet",
+	},
+};
+
+static const struct mfd_cell ab8540_cut1_devs[] = {
+	{
+		.name = "ab8500-rtc",
+		.of_compatible = "stericsson,ab8500-rtc",
+	},
+};
+
+static const struct mfd_cell ab8540_cut2_devs[] = {
+	{
+		.name = "ab8540-rtc",
+		.of_compatible = "stericsson,ab8540-rtc",
+	},
+};
+
+static ssize_t show_chip_id(struct device *dev,
+				struct device_attribute *attr, char *buf)
+{
+	struct ab8500 *ab8500;
+
+	ab8500 = dev_get_drvdata(dev);
+
+	return sprintf(buf, "%#x\n", ab8500 ? ab8500->chip_id : -EINVAL);
+}
+
+/*
+ * ab8500 has switched off due to (SWITCH_OFF_STATUS):
+ * 0x01 Swoff bit programming
+ * 0x02 Thermal protection activation
+ * 0x04 Vbat lower then BattOk falling threshold
+ * 0x08 Watchdog expired
+ * 0x10 Non presence of 32kHz clock
+ * 0x20 Battery level lower than power on reset threshold
+ * 0x40 Power on key 1 pressed longer than 10 seconds
+ * 0x80 DB8500 thermal shutdown
+ */
+static ssize_t show_switch_off_status(struct device *dev,
+				struct device_attribute *attr, char *buf)
+{
+	int ret;
+	u8 value;
+	struct ab8500 *ab8500;
+
+	ab8500 = dev_get_drvdata(dev);
+	ret = get_register_interruptible(ab8500, AB8500_RTC,
+		AB8500_SWITCH_OFF_STATUS, &value);
+	if (ret < 0)
+		return ret;
+	return sprintf(buf, "%#x\n", value);
+}
+
+/* use mask and set to override the register turn_on_stat value */
+void ab8500_override_turn_on_stat(u8 mask, u8 set)
+{
+	spin_lock(&on_stat_lock);
+	turn_on_stat_mask = mask;
+	turn_on_stat_set = set;
+	spin_unlock(&on_stat_lock);
+}
+
+/*
+ * ab8500 has turned on due to (TURN_ON_STATUS):
+ * 0x01 PORnVbat
+ * 0x02 PonKey1dbF
+ * 0x04 PonKey2dbF
+ * 0x08 RTCAlarm
+ * 0x10 MainChDet
+ * 0x20 VbusDet
+ * 0x40 UsbIDDetect
+ * 0x80 Reserved
+ */
+static ssize_t show_turn_on_status(struct device *dev,
+				struct device_attribute *attr, char *buf)
+{
+	int ret;
+	u8 value;
+	struct ab8500 *ab8500;
+
+	ab8500 = dev_get_drvdata(dev);
+	ret = get_register_interruptible(ab8500, AB8500_SYS_CTRL1_BLOCK,
+		AB8500_TURN_ON_STATUS, &value);
+	if (ret < 0)
+		return ret;
+
+	/*
+	 * In L9540, turn_on_status register is not updated correctly if
+	 * the device is rebooted with AC/USB charger connected. Due to
+	 * this, the device boots android instead of entering into charge
+	 * only mode. Read the AC/USB status register to detect the charger
+	 * presence and update the turn on status manually.
+	 */
+	if (is_ab9540(ab8500)) {
+		spin_lock(&on_stat_lock);
+		value = (value & turn_on_stat_mask) | turn_on_stat_set;
+		spin_unlock(&on_stat_lock);
+	}
+
+	return sprintf(buf, "%#x\n", value);
+}
+
+static ssize_t show_turn_on_status_2(struct device *dev,
+				struct device_attribute *attr, char *buf)
+{
+	int ret;
+	u8 value;
+	struct ab8500 *ab8500;
+
+	ab8500 = dev_get_drvdata(dev);
+	ret = get_register_interruptible(ab8500, AB8500_SYS_CTRL1_BLOCK,
+		AB8505_TURN_ON_STATUS_2, &value);
+	if (ret < 0)
+		return ret;
+	return sprintf(buf, "%#x\n", (value & 0x1));
+}
+
+static ssize_t show_ab9540_dbbrstn(struct device *dev,
+				struct device_attribute *attr, char *buf)
+{
+	struct ab8500 *ab8500;
+	int ret;
+	u8 value;
+
+	ab8500 = dev_get_drvdata(dev);
+
+	ret = get_register_interruptible(ab8500, AB8500_REGU_CTRL2,
+		AB9540_MODEM_CTRL2_REG, &value);
+	if (ret < 0)
+		return ret;
+
+	return sprintf(buf, "%d\n",
+			(value & AB9540_MODEM_CTRL2_SWDBBRSTN_BIT) ? 1 : 0);
+}
+
+static ssize_t store_ab9540_dbbrstn(struct device *dev,
+	struct device_attribute *attr, const char *buf, size_t count)
+{
+	struct ab8500 *ab8500;
+	int ret = count;
+	int err;
+	u8 bitvalues;
+
+	ab8500 = dev_get_drvdata(dev);
+
+	if (count > 0) {
+		switch (buf[0]) {
+		case '0':
+			bitvalues = 0;
+			break;
+		case '1':
+			bitvalues = AB9540_MODEM_CTRL2_SWDBBRSTN_BIT;
+			break;
+		default:
+			goto exit;
+		}
+
+		err = mask_and_set_register_interruptible(ab8500,
+			AB8500_REGU_CTRL2, AB9540_MODEM_CTRL2_REG,
+			AB9540_MODEM_CTRL2_SWDBBRSTN_BIT, bitvalues);
+		if (err)
+			dev_info(ab8500->dev,
+				"Failed to set DBBRSTN %c, err %#x\n",
+				buf[0], err);
+	}
+
+exit:
+	return ret;
+}
+
+static DEVICE_ATTR(chip_id, S_IRUGO, show_chip_id, NULL);
+static DEVICE_ATTR(switch_off_status, S_IRUGO, show_switch_off_status, NULL);
+static DEVICE_ATTR(turn_on_status, S_IRUGO, show_turn_on_status, NULL);
+static DEVICE_ATTR(turn_on_status_2, S_IRUGO, show_turn_on_status_2, NULL);
+static DEVICE_ATTR(dbbrstn, S_IRUGO | S_IWUSR,
+			show_ab9540_dbbrstn, store_ab9540_dbbrstn);
+
+static struct attribute *ab8500_sysfs_entries[] = {
+	&dev_attr_chip_id.attr,
+	&dev_attr_switch_off_status.attr,
+	&dev_attr_turn_on_status.attr,
+	NULL,
+};
+
+static struct attribute *ab8505_sysfs_entries[] = {
+	&dev_attr_turn_on_status_2.attr,
+	NULL,
+};
+
+static struct attribute *ab9540_sysfs_entries[] = {
+	&dev_attr_chip_id.attr,
+	&dev_attr_switch_off_status.attr,
+	&dev_attr_turn_on_status.attr,
+	&dev_attr_dbbrstn.attr,
+	NULL,
+};
+
+static const struct attribute_group ab8500_attr_group = {
+	.attrs	= ab8500_sysfs_entries,
+};
+
+static const struct attribute_group ab8505_attr_group = {
+	.attrs	= ab8505_sysfs_entries,
+};
+
+static const struct attribute_group ab9540_attr_group = {
+	.attrs	= ab9540_sysfs_entries,
+};
+
+static int ab8500_probe(struct platform_device *pdev)
+{
+	static const char * const switch_off_status[] = {
+		"Swoff bit programming",
+		"Thermal protection activation",
+		"Vbat lower then BattOk falling threshold",
+		"Watchdog expired",
+		"Non presence of 32kHz clock",
+		"Battery level lower than power on reset threshold",
+		"Power on key 1 pressed longer than 10 seconds",
+		"DB8500 thermal shutdown"};
+	static const char * const turn_on_status[] = {
+		"Battery rising (Vbat)",
+		"Power On Key 1 dbF",
+		"Power On Key 2 dbF",
+		"RTC Alarm",
+		"Main Charger Detect",
+		"Vbus Detect (USB)",
+		"USB ID Detect",
+		"UART Factory Mode Detect"};
+	const struct platform_device_id *platid = platform_get_device_id(pdev);
+	enum ab8500_version version = AB8500_VERSION_UNDEFINED;
+	struct device_node *np = pdev->dev.of_node;
+	struct ab8500 *ab8500;
+	struct resource *resource;
+	int ret;
+	int i;
+	u8 value;
+
+	ab8500 = devm_kzalloc(&pdev->dev, sizeof(*ab8500), GFP_KERNEL);
+	if (!ab8500)
+		return -ENOMEM;
+
+	ab8500->dev = &pdev->dev;
+
+	resource = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+	if (!resource) {
+		dev_err(&pdev->dev, "no IRQ resource\n");
+		return -ENODEV;
+	}
+
+	ab8500->irq = resource->start;
+
+	ab8500->read = ab8500_prcmu_read;
+	ab8500->write = ab8500_prcmu_write;
+	ab8500->write_masked = ab8500_prcmu_write_masked;
+
+	mutex_init(&ab8500->lock);
+	mutex_init(&ab8500->irq_lock);
+	atomic_set(&ab8500->transfer_ongoing, 0);
+
+	platform_set_drvdata(pdev, ab8500);
+
+	if (platid)
+		version = platid->driver_data;
+
+	if (version != AB8500_VERSION_UNDEFINED)
+		ab8500->version = version;
+	else {
+		ret = get_register_interruptible(ab8500, AB8500_MISC,
+			AB8500_IC_NAME_REG, &value);
+		if (ret < 0) {
+			dev_err(&pdev->dev, "could not probe HW\n");
+			return ret;
+		}
+
+		ab8500->version = value;
+	}
+
+	ret = get_register_interruptible(ab8500, AB8500_MISC,
+		AB8500_REV_REG, &value);
+	if (ret < 0)
+		return ret;
+
+	ab8500->chip_id = value;
+
+	dev_info(ab8500->dev, "detected chip, %s rev. %1x.%1x\n",
+			ab8500_version_str[ab8500->version],
+			ab8500->chip_id >> 4,
+			ab8500->chip_id & 0x0F);
+
+	/* Configure AB8540 */
+	if (is_ab8540(ab8500)) {
+		ab8500->mask_size = AB8540_NUM_IRQ_REGS;
+		ab8500->irq_reg_offset = ab8540_irq_regoffset;
+		ab8500->it_latchhier_num = AB8540_IT_LATCHHIER_NUM;
+	} /* Configure AB8500 or AB9540 IRQ */
+	else if (is_ab9540(ab8500) || is_ab8505(ab8500)) {
+		ab8500->mask_size = AB9540_NUM_IRQ_REGS;
+		ab8500->irq_reg_offset = ab9540_irq_regoffset;
+		ab8500->it_latchhier_num = AB8500_IT_LATCHHIER_NUM;
+	} else {
+		ab8500->mask_size = AB8500_NUM_IRQ_REGS;
+		ab8500->irq_reg_offset = ab8500_irq_regoffset;
+		ab8500->it_latchhier_num = AB8500_IT_LATCHHIER_NUM;
+	}
+	ab8500->mask = devm_kzalloc(&pdev->dev, ab8500->mask_size,
+				    GFP_KERNEL);
+	if (!ab8500->mask)
+		return -ENOMEM;
+	ab8500->oldmask = devm_kzalloc(&pdev->dev, ab8500->mask_size,
+				       GFP_KERNEL);
+	if (!ab8500->oldmask)
+		return -ENOMEM;
+
+	/*
+	 * ab8500 has switched off due to (SWITCH_OFF_STATUS):
+	 * 0x01 Swoff bit programming
+	 * 0x02 Thermal protection activation
+	 * 0x04 Vbat lower then BattOk falling threshold
+	 * 0x08 Watchdog expired
+	 * 0x10 Non presence of 32kHz clock
+	 * 0x20 Battery level lower than power on reset threshold
+	 * 0x40 Power on key 1 pressed longer than 10 seconds
+	 * 0x80 DB8500 thermal shutdown
+	 */
+
+	ret = get_register_interruptible(ab8500, AB8500_RTC,
+		AB8500_SWITCH_OFF_STATUS, &value);
+	if (ret < 0)
+		return ret;
+	dev_info(ab8500->dev, "switch off cause(s) (%#x): ", value);
+
+	if (value) {
+		for (i = 0; i < ARRAY_SIZE(switch_off_status); i++) {
+			if (value & 1)
+				pr_cont(" \"%s\"", switch_off_status[i]);
+			value = value >> 1;
+
+		}
+		pr_cont("\n");
+	} else {
+		pr_cont(" None\n");
+	}
+	ret = get_register_interruptible(ab8500, AB8500_SYS_CTRL1_BLOCK,
+		AB8500_TURN_ON_STATUS, &value);
+	if (ret < 0)
+		return ret;
+	dev_info(ab8500->dev, "turn on reason(s) (%#x): ", value);
+
+	if (value) {
+		for (i = 0; i < ARRAY_SIZE(turn_on_status); i++) {
+			if (value & 1)
+				pr_cont("\"%s\" ", turn_on_status[i]);
+			value = value >> 1;
+		}
+		pr_cont("\n");
+	} else {
+		pr_cont("None\n");
+	}
+
+	if (is_ab9540(ab8500)) {
+		ret = get_register_interruptible(ab8500, AB8500_CHARGER,
+			AB8500_CH_USBCH_STAT1_REG, &value);
+		if (ret < 0)
+			return ret;
+		if ((value & VBUS_DET_DBNC1) && (value & VBUS_DET_DBNC100))
+			ab8500_override_turn_on_stat(~AB8500_POW_KEY_1_ON,
+						     AB8500_VBUS_DET);
+	}
+
+	/* Clear and mask all interrupts */
+	for (i = 0; i < ab8500->mask_size; i++) {
+		/*
+		 * Interrupt register 12 doesn't exist prior to AB8500 version
+		 * 2.0
+		 */
+		if (ab8500->irq_reg_offset[i] == 11 &&
+				is_ab8500_1p1_or_earlier(ab8500))
+			continue;
+
+		if (ab8500->irq_reg_offset[i] < 0)
+			continue;
+
+		get_register_interruptible(ab8500, AB8500_INTERRUPT,
+			AB8500_IT_LATCH1_REG + ab8500->irq_reg_offset[i],
+			&value);
+		set_register_interruptible(ab8500, AB8500_INTERRUPT,
+			AB8500_IT_MASK1_REG + ab8500->irq_reg_offset[i], 0xff);
+	}
+
+	ret = abx500_register_ops(ab8500->dev, &ab8500_ops);
+	if (ret)
+		return ret;
+
+	for (i = 0; i < ab8500->mask_size; i++)
+		ab8500->mask[i] = ab8500->oldmask[i] = 0xff;
+
+	ret = ab8500_irq_init(ab8500, np);
+	if (ret)
+		return ret;
+
+	ret = devm_request_threaded_irq(&pdev->dev, ab8500->irq, NULL,
+			ab8500_hierarchical_irq,
+			IRQF_ONESHOT | IRQF_NO_SUSPEND,
+			"ab8500", ab8500);
+	if (ret)
+		return ret;
+
+	if (is_ab9540(ab8500))
+		ret = mfd_add_devices(ab8500->dev, 0, ab9540_devs,
+				ARRAY_SIZE(ab9540_devs), NULL,
+				0, ab8500->domain);
+	else if (is_ab8540(ab8500)) {
+		ret = mfd_add_devices(ab8500->dev, 0, ab8540_devs,
+			      ARRAY_SIZE(ab8540_devs), NULL,
+			      0, ab8500->domain);
+		if (ret)
+			return ret;
+
+		if (is_ab8540_1p2_or_earlier(ab8500))
+			ret = mfd_add_devices(ab8500->dev, 0, ab8540_cut1_devs,
+			      ARRAY_SIZE(ab8540_cut1_devs), NULL,
+			      0, ab8500->domain);
+		else /* ab8540 >= cut2 */
+			ret = mfd_add_devices(ab8500->dev, 0, ab8540_cut2_devs,
+			      ARRAY_SIZE(ab8540_cut2_devs), NULL,
+			      0, ab8500->domain);
+	} else if (is_ab8505(ab8500))
+		ret = mfd_add_devices(ab8500->dev, 0, ab8505_devs,
+			      ARRAY_SIZE(ab8505_devs), NULL,
+			      0, ab8500->domain);
+	else
+		ret = mfd_add_devices(ab8500->dev, 0, ab8500_devs,
+				ARRAY_SIZE(ab8500_devs), NULL,
+				0, ab8500->domain);
+	if (ret)
+		return ret;
+
+	if (!no_bm) {
+		/* Add battery management devices */
+		ret = mfd_add_devices(ab8500->dev, 0, ab8500_bm_devs,
+				      ARRAY_SIZE(ab8500_bm_devs), NULL,
+				      0, ab8500->domain);
+		if (ret)
+			dev_err(ab8500->dev, "error adding bm devices\n");
+	}
+
+	if (((is_ab8505(ab8500) || is_ab9540(ab8500)) &&
+			ab8500->chip_id >= AB8500_CUT2P0) || is_ab8540(ab8500))
+		ret = sysfs_create_group(&ab8500->dev->kobj,
+					&ab9540_attr_group);
+	else
+		ret = sysfs_create_group(&ab8500->dev->kobj,
+					&ab8500_attr_group);
+
+	if ((is_ab8505(ab8500) || is_ab9540(ab8500)) &&
+			ab8500->chip_id >= AB8500_CUT2P0)
+		ret = sysfs_create_group(&ab8500->dev->kobj,
+					 &ab8505_attr_group);
+
+	if (ret)
+		dev_err(ab8500->dev, "error creating sysfs entries\n");
+
+	return ret;
+}
+
+static const struct platform_device_id ab8500_id[] = {
+	{ "ab8500-core", AB8500_VERSION_AB8500 },
+	{ "ab8505-i2c", AB8500_VERSION_AB8505 },
+	{ "ab9540-i2c", AB8500_VERSION_AB9540 },
+	{ "ab8540-i2c", AB8500_VERSION_AB8540 },
+	{ }
+};
+
+static struct platform_driver ab8500_core_driver = {
+	.driver = {
+		.name = "ab8500-core",
+		.suppress_bind_attrs = true,
+	},
+	.probe	= ab8500_probe,
+	.id_table = ab8500_id,
+};
+
+static int __init ab8500_core_init(void)
+{
+	return platform_driver_register(&ab8500_core_driver);
+}
+core_initcall(ab8500_core_init);