Adding upstream version 4.19.249.upstream/4.19.249

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

1 files changed, 1086 insertions, 0 deletions

diff --git a/drivers/mfd/asic3.c b/drivers/mfd/asic3.c
new file mode 100644
index 000000000..75584cee0
--- /dev/null
+++ b/drivers/mfd/asic3.c
@@ -0,0 +1,1086 @@
+/*
+ * driver/mfd/asic3.c
+ *
+ * Compaq ASIC3 support.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Copyright 2001 Compaq Computer Corporation.
+ * Copyright 2004-2005 Phil Blundell
+ * Copyright 2007-2008 OpenedHand Ltd.
+ *
+ * Authors: Phil Blundell <pb@handhelds.org>,
+ *	    Samuel Ortiz <sameo@openedhand.com>
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/delay.h>
+#include <linux/irq.h>
+#include <linux/gpio.h>
+#include <linux/export.h>
+#include <linux/io.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <linux/platform_device.h>
+
+#include <linux/mfd/asic3.h>
+#include <linux/mfd/core.h>
+#include <linux/mfd/ds1wm.h>
+#include <linux/mfd/tmio.h>
+
+#include <linux/mmc/host.h>
+
+enum {
+	ASIC3_CLOCK_SPI,
+	ASIC3_CLOCK_OWM,
+	ASIC3_CLOCK_PWM0,
+	ASIC3_CLOCK_PWM1,
+	ASIC3_CLOCK_LED0,
+	ASIC3_CLOCK_LED1,
+	ASIC3_CLOCK_LED2,
+	ASIC3_CLOCK_SD_HOST,
+	ASIC3_CLOCK_SD_BUS,
+	ASIC3_CLOCK_SMBUS,
+	ASIC3_CLOCK_EX0,
+	ASIC3_CLOCK_EX1,
+};
+
+struct asic3_clk {
+	int enabled;
+	unsigned int cdex;
+	unsigned long rate;
+};
+
+#define INIT_CDEX(_name, _rate)	\
+	[ASIC3_CLOCK_##_name] = {		\
+		.cdex = CLOCK_CDEX_##_name,	\
+		.rate = _rate,			\
+	}
+
+static struct asic3_clk asic3_clk_init[] __initdata = {
+	INIT_CDEX(SPI, 0),
+	INIT_CDEX(OWM, 5000000),
+	INIT_CDEX(PWM0, 0),
+	INIT_CDEX(PWM1, 0),
+	INIT_CDEX(LED0, 0),
+	INIT_CDEX(LED1, 0),
+	INIT_CDEX(LED2, 0),
+	INIT_CDEX(SD_HOST, 24576000),
+	INIT_CDEX(SD_BUS, 12288000),
+	INIT_CDEX(SMBUS, 0),
+	INIT_CDEX(EX0, 32768),
+	INIT_CDEX(EX1, 24576000),
+};
+
+struct asic3 {
+	void __iomem *mapping;
+	unsigned int bus_shift;
+	unsigned int irq_nr;
+	unsigned int irq_base;
+	raw_spinlock_t lock;
+	u16 irq_bothedge[4];
+	struct gpio_chip gpio;
+	struct device *dev;
+	void __iomem *tmio_cnf;
+
+	struct asic3_clk clocks[ARRAY_SIZE(asic3_clk_init)];
+};
+
+static int asic3_gpio_get(struct gpio_chip *chip, unsigned offset);
+
+void asic3_write_register(struct asic3 *asic, unsigned int reg, u32 value)
+{
+	iowrite16(value, asic->mapping +
+		  (reg >> asic->bus_shift));
+}
+EXPORT_SYMBOL_GPL(asic3_write_register);
+
+u32 asic3_read_register(struct asic3 *asic, unsigned int reg)
+{
+	return ioread16(asic->mapping +
+			(reg >> asic->bus_shift));
+}
+EXPORT_SYMBOL_GPL(asic3_read_register);
+
+static void asic3_set_register(struct asic3 *asic, u32 reg, u32 bits, bool set)
+{
+	unsigned long flags;
+	u32 val;
+
+	raw_spin_lock_irqsave(&asic->lock, flags);
+	val = asic3_read_register(asic, reg);
+	if (set)
+		val |= bits;
+	else
+		val &= ~bits;
+	asic3_write_register(asic, reg, val);
+	raw_spin_unlock_irqrestore(&asic->lock, flags);
+}
+
+/* IRQs */
+#define MAX_ASIC_ISR_LOOPS    20
+#define ASIC3_GPIO_BASE_INCR \
+	(ASIC3_GPIO_B_BASE - ASIC3_GPIO_A_BASE)
+
+static void asic3_irq_flip_edge(struct asic3 *asic,
+				u32 base, int bit)
+{
+	u16 edge;
+	unsigned long flags;
+
+	raw_spin_lock_irqsave(&asic->lock, flags);
+	edge = asic3_read_register(asic,
+				   base + ASIC3_GPIO_EDGE_TRIGGER);
+	edge ^= bit;
+	asic3_write_register(asic,
+			     base + ASIC3_GPIO_EDGE_TRIGGER, edge);
+	raw_spin_unlock_irqrestore(&asic->lock, flags);
+}
+
+static void asic3_irq_demux(struct irq_desc *desc)
+{
+	struct asic3 *asic = irq_desc_get_handler_data(desc);
+	struct irq_data *data = irq_desc_get_irq_data(desc);
+	int iter, i;
+	unsigned long flags;
+
+	data->chip->irq_ack(data);
+
+	for (iter = 0 ; iter < MAX_ASIC_ISR_LOOPS; iter++) {
+		u32 status;
+		int bank;
+
+		raw_spin_lock_irqsave(&asic->lock, flags);
+		status = asic3_read_register(asic,
+					     ASIC3_OFFSET(INTR, P_INT_STAT));
+		raw_spin_unlock_irqrestore(&asic->lock, flags);
+
+		/* Check all ten register bits */
+		if ((status & 0x3ff) == 0)
+			break;
+
+		/* Handle GPIO IRQs */
+		for (bank = 0; bank < ASIC3_NUM_GPIO_BANKS; bank++) {
+			if (status & (1 << bank)) {
+				unsigned long base, istat;
+
+				base = ASIC3_GPIO_A_BASE
+				       + bank * ASIC3_GPIO_BASE_INCR;
+				raw_spin_lock_irqsave(&asic->lock, flags);
+				istat = asic3_read_register(asic,
+							    base +
+							    ASIC3_GPIO_INT_STATUS);
+				/* Clearing IntStatus */
+				asic3_write_register(asic,
+						     base +
+						     ASIC3_GPIO_INT_STATUS, 0);
+				raw_spin_unlock_irqrestore(&asic->lock, flags);
+
+				for (i = 0; i < ASIC3_GPIOS_PER_BANK; i++) {
+					int bit = (1 << i);
+					unsigned int irqnr;
+
+					if (!(istat & bit))
+						continue;
+
+					irqnr = asic->irq_base +
+						(ASIC3_GPIOS_PER_BANK * bank)
+						+ i;
+					generic_handle_irq(irqnr);
+					if (asic->irq_bothedge[bank] & bit)
+						asic3_irq_flip_edge(asic, base,
+								    bit);
+				}
+			}
+		}
+
+		/* Handle remaining IRQs in the status register */
+		for (i = ASIC3_NUM_GPIOS; i < ASIC3_NR_IRQS; i++) {
+			/* They start at bit 4 and go up */
+			if (status & (1 << (i - ASIC3_NUM_GPIOS + 4)))
+				generic_handle_irq(asic->irq_base + i);
+		}
+	}
+
+	if (iter >= MAX_ASIC_ISR_LOOPS)
+		dev_err(asic->dev, "interrupt processing overrun\n");
+}
+
+static inline int asic3_irq_to_bank(struct asic3 *asic, int irq)
+{
+	int n;
+
+	n = (irq - asic->irq_base) >> 4;
+
+	return (n * (ASIC3_GPIO_B_BASE - ASIC3_GPIO_A_BASE));
+}
+
+static inline int asic3_irq_to_index(struct asic3 *asic, int irq)
+{
+	return (irq - asic->irq_base) & 0xf;
+}
+
+static void asic3_mask_gpio_irq(struct irq_data *data)
+{
+	struct asic3 *asic = irq_data_get_irq_chip_data(data);
+	u32 val, bank, index;
+	unsigned long flags;
+
+	bank = asic3_irq_to_bank(asic, data->irq);
+	index = asic3_irq_to_index(asic, data->irq);
+
+	raw_spin_lock_irqsave(&asic->lock, flags);
+	val = asic3_read_register(asic, bank + ASIC3_GPIO_MASK);
+	val |= 1 << index;
+	asic3_write_register(asic, bank + ASIC3_GPIO_MASK, val);
+	raw_spin_unlock_irqrestore(&asic->lock, flags);
+}
+
+static void asic3_mask_irq(struct irq_data *data)
+{
+	struct asic3 *asic = irq_data_get_irq_chip_data(data);
+	int regval;
+	unsigned long flags;
+
+	raw_spin_lock_irqsave(&asic->lock, flags);
+	regval = asic3_read_register(asic,
+				     ASIC3_INTR_BASE +
+				     ASIC3_INTR_INT_MASK);
+
+	regval &= ~(ASIC3_INTMASK_MASK0 <<
+		    (data->irq - (asic->irq_base + ASIC3_NUM_GPIOS)));
+
+	asic3_write_register(asic,
+			     ASIC3_INTR_BASE +
+			     ASIC3_INTR_INT_MASK,
+			     regval);
+	raw_spin_unlock_irqrestore(&asic->lock, flags);
+}
+
+static void asic3_unmask_gpio_irq(struct irq_data *data)
+{
+	struct asic3 *asic = irq_data_get_irq_chip_data(data);
+	u32 val, bank, index;
+	unsigned long flags;
+
+	bank = asic3_irq_to_bank(asic, data->irq);
+	index = asic3_irq_to_index(asic, data->irq);
+
+	raw_spin_lock_irqsave(&asic->lock, flags);
+	val = asic3_read_register(asic, bank + ASIC3_GPIO_MASK);
+	val &= ~(1 << index);
+	asic3_write_register(asic, bank + ASIC3_GPIO_MASK, val);
+	raw_spin_unlock_irqrestore(&asic->lock, flags);
+}
+
+static void asic3_unmask_irq(struct irq_data *data)
+{
+	struct asic3 *asic = irq_data_get_irq_chip_data(data);
+	int regval;
+	unsigned long flags;
+
+	raw_spin_lock_irqsave(&asic->lock, flags);
+	regval = asic3_read_register(asic,
+				     ASIC3_INTR_BASE +
+				     ASIC3_INTR_INT_MASK);
+
+	regval |= (ASIC3_INTMASK_MASK0 <<
+		   (data->irq - (asic->irq_base + ASIC3_NUM_GPIOS)));
+
+	asic3_write_register(asic,
+			     ASIC3_INTR_BASE +
+			     ASIC3_INTR_INT_MASK,
+			     regval);
+	raw_spin_unlock_irqrestore(&asic->lock, flags);
+}
+
+static int asic3_gpio_irq_type(struct irq_data *data, unsigned int type)
+{
+	struct asic3 *asic = irq_data_get_irq_chip_data(data);
+	u32 bank, index;
+	u16 trigger, level, edge, bit;
+	unsigned long flags;
+
+	bank = asic3_irq_to_bank(asic, data->irq);
+	index = asic3_irq_to_index(asic, data->irq);
+	bit = 1<<index;
+
+	raw_spin_lock_irqsave(&asic->lock, flags);
+	level = asic3_read_register(asic,
+				    bank + ASIC3_GPIO_LEVEL_TRIGGER);
+	edge = asic3_read_register(asic,
+				   bank + ASIC3_GPIO_EDGE_TRIGGER);
+	trigger = asic3_read_register(asic,
+				      bank + ASIC3_GPIO_TRIGGER_TYPE);
+	asic->irq_bothedge[(data->irq - asic->irq_base) >> 4] &= ~bit;
+
+	if (type == IRQ_TYPE_EDGE_RISING) {
+		trigger |= bit;
+		edge |= bit;
+	} else if (type == IRQ_TYPE_EDGE_FALLING) {
+		trigger |= bit;
+		edge &= ~bit;
+	} else if (type == IRQ_TYPE_EDGE_BOTH) {
+		trigger |= bit;
+		if (asic3_gpio_get(&asic->gpio, data->irq - asic->irq_base))
+			edge &= ~bit;
+		else
+			edge |= bit;
+		asic->irq_bothedge[(data->irq - asic->irq_base) >> 4] |= bit;
+	} else if (type == IRQ_TYPE_LEVEL_LOW) {
+		trigger &= ~bit;
+		level &= ~bit;
+	} else if (type == IRQ_TYPE_LEVEL_HIGH) {
+		trigger &= ~bit;
+		level |= bit;
+	} else {
+		/*
+		 * if type == IRQ_TYPE_NONE, we should mask interrupts, but
+		 * be careful to not unmask them if mask was also called.
+		 * Probably need internal state for mask.
+		 */
+		dev_notice(asic->dev, "irq type not changed\n");
+	}
+	asic3_write_register(asic, bank + ASIC3_GPIO_LEVEL_TRIGGER,
+			     level);
+	asic3_write_register(asic, bank + ASIC3_GPIO_EDGE_TRIGGER,
+			     edge);
+	asic3_write_register(asic, bank + ASIC3_GPIO_TRIGGER_TYPE,
+			     trigger);
+	raw_spin_unlock_irqrestore(&asic->lock, flags);
+	return 0;
+}
+
+static int asic3_gpio_irq_set_wake(struct irq_data *data, unsigned int on)
+{
+	struct asic3 *asic = irq_data_get_irq_chip_data(data);
+	u32 bank, index;
+	u16 bit;
+
+	bank = asic3_irq_to_bank(asic, data->irq);
+	index = asic3_irq_to_index(asic, data->irq);
+	bit = 1<<index;
+
+	asic3_set_register(asic, bank + ASIC3_GPIO_SLEEP_MASK, bit, !on);
+
+	return 0;
+}
+
+static struct irq_chip asic3_gpio_irq_chip = {
+	.name		= "ASIC3-GPIO",
+	.irq_ack	= asic3_mask_gpio_irq,
+	.irq_mask	= asic3_mask_gpio_irq,
+	.irq_unmask	= asic3_unmask_gpio_irq,
+	.irq_set_type	= asic3_gpio_irq_type,
+	.irq_set_wake	= asic3_gpio_irq_set_wake,
+};
+
+static struct irq_chip asic3_irq_chip = {
+	.name		= "ASIC3",
+	.irq_ack	= asic3_mask_irq,
+	.irq_mask	= asic3_mask_irq,
+	.irq_unmask	= asic3_unmask_irq,
+};
+
+static int __init asic3_irq_probe(struct platform_device *pdev)
+{
+	struct asic3 *asic = platform_get_drvdata(pdev);
+	unsigned long clksel = 0;
+	unsigned int irq, irq_base;
+	int ret;
+
+	ret = platform_get_irq(pdev, 0);
+	if (ret < 0)
+		return ret;
+	asic->irq_nr = ret;
+
+	/* turn on clock to IRQ controller */
+	clksel |= CLOCK_SEL_CX;
+	asic3_write_register(asic, ASIC3_OFFSET(CLOCK, SEL),
+			     clksel);
+
+	irq_base = asic->irq_base;
+
+	for (irq = irq_base; irq < irq_base + ASIC3_NR_IRQS; irq++) {
+		if (irq < asic->irq_base + ASIC3_NUM_GPIOS)
+			irq_set_chip(irq, &asic3_gpio_irq_chip);
+		else
+			irq_set_chip(irq, &asic3_irq_chip);
+
+		irq_set_chip_data(irq, asic);
+		irq_set_handler(irq, handle_level_irq);
+		irq_clear_status_flags(irq, IRQ_NOREQUEST | IRQ_NOPROBE);
+	}
+
+	asic3_write_register(asic, ASIC3_OFFSET(INTR, INT_MASK),
+			     ASIC3_INTMASK_GINTMASK);
+
+	irq_set_chained_handler_and_data(asic->irq_nr, asic3_irq_demux, asic);
+	irq_set_irq_type(asic->irq_nr, IRQ_TYPE_EDGE_RISING);
+
+	return 0;
+}
+
+static void asic3_irq_remove(struct platform_device *pdev)
+{
+	struct asic3 *asic = platform_get_drvdata(pdev);
+	unsigned int irq, irq_base;
+
+	irq_base = asic->irq_base;
+
+	for (irq = irq_base; irq < irq_base + ASIC3_NR_IRQS; irq++) {
+		irq_set_status_flags(irq, IRQ_NOREQUEST | IRQ_NOPROBE);
+		irq_set_chip_and_handler(irq, NULL, NULL);
+		irq_set_chip_data(irq, NULL);
+	}
+	irq_set_chained_handler(asic->irq_nr, NULL);
+}
+
+/* GPIOs */
+static int asic3_gpio_direction(struct gpio_chip *chip,
+				unsigned offset, int out)
+{
+	u32 mask = ASIC3_GPIO_TO_MASK(offset), out_reg;
+	unsigned int gpio_base;
+	unsigned long flags;
+	struct asic3 *asic;
+
+	asic = gpiochip_get_data(chip);
+	gpio_base = ASIC3_GPIO_TO_BASE(offset);
+
+	if (gpio_base > ASIC3_GPIO_D_BASE) {
+		dev_err(asic->dev, "Invalid base (0x%x) for gpio %d\n",
+			gpio_base, offset);
+		return -EINVAL;
+	}
+
+	raw_spin_lock_irqsave(&asic->lock, flags);
+
+	out_reg = asic3_read_register(asic, gpio_base + ASIC3_GPIO_DIRECTION);
+
+	/* Input is 0, Output is 1 */
+	if (out)
+		out_reg |= mask;
+	else
+		out_reg &= ~mask;
+
+	asic3_write_register(asic, gpio_base + ASIC3_GPIO_DIRECTION, out_reg);
+
+	raw_spin_unlock_irqrestore(&asic->lock, flags);
+
+	return 0;
+
+}
+
+static int asic3_gpio_direction_input(struct gpio_chip *chip,
+				      unsigned offset)
+{
+	return asic3_gpio_direction(chip, offset, 0);
+}
+
+static int asic3_gpio_direction_output(struct gpio_chip *chip,
+				       unsigned offset, int value)
+{
+	return asic3_gpio_direction(chip, offset, 1);
+}
+
+static int asic3_gpio_get(struct gpio_chip *chip,
+			  unsigned offset)
+{
+	unsigned int gpio_base;
+	u32 mask = ASIC3_GPIO_TO_MASK(offset);
+	struct asic3 *asic;
+
+	asic = gpiochip_get_data(chip);
+	gpio_base = ASIC3_GPIO_TO_BASE(offset);
+
+	if (gpio_base > ASIC3_GPIO_D_BASE) {
+		dev_err(asic->dev, "Invalid base (0x%x) for gpio %d\n",
+			gpio_base, offset);
+		return -EINVAL;
+	}
+
+	return !!(asic3_read_register(asic,
+				      gpio_base + ASIC3_GPIO_STATUS) & mask);
+}
+
+static void asic3_gpio_set(struct gpio_chip *chip,
+			   unsigned offset, int value)
+{
+	u32 mask, out_reg;
+	unsigned int gpio_base;
+	unsigned long flags;
+	struct asic3 *asic;
+
+	asic = gpiochip_get_data(chip);
+	gpio_base = ASIC3_GPIO_TO_BASE(offset);
+
+	if (gpio_base > ASIC3_GPIO_D_BASE) {
+		dev_err(asic->dev, "Invalid base (0x%x) for gpio %d\n",
+			gpio_base, offset);
+		return;
+	}
+
+	mask = ASIC3_GPIO_TO_MASK(offset);
+
+	raw_spin_lock_irqsave(&asic->lock, flags);
+
+	out_reg = asic3_read_register(asic, gpio_base + ASIC3_GPIO_OUT);
+
+	if (value)
+		out_reg |= mask;
+	else
+		out_reg &= ~mask;
+
+	asic3_write_register(asic, gpio_base + ASIC3_GPIO_OUT, out_reg);
+
+	raw_spin_unlock_irqrestore(&asic->lock, flags);
+}
+
+static int asic3_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
+{
+	struct asic3 *asic = gpiochip_get_data(chip);
+
+	return asic->irq_base + offset;
+}
+
+static __init int asic3_gpio_probe(struct platform_device *pdev,
+				   u16 *gpio_config, int num)
+{
+	struct asic3 *asic = platform_get_drvdata(pdev);
+	u16 alt_reg[ASIC3_NUM_GPIO_BANKS];
+	u16 out_reg[ASIC3_NUM_GPIO_BANKS];
+	u16 dir_reg[ASIC3_NUM_GPIO_BANKS];
+	int i;
+
+	memset(alt_reg, 0, ASIC3_NUM_GPIO_BANKS * sizeof(u16));
+	memset(out_reg, 0, ASIC3_NUM_GPIO_BANKS * sizeof(u16));
+	memset(dir_reg, 0, ASIC3_NUM_GPIO_BANKS * sizeof(u16));
+
+	/* Enable all GPIOs */
+	asic3_write_register(asic, ASIC3_GPIO_OFFSET(A, MASK), 0xffff);
+	asic3_write_register(asic, ASIC3_GPIO_OFFSET(B, MASK), 0xffff);
+	asic3_write_register(asic, ASIC3_GPIO_OFFSET(C, MASK), 0xffff);
+	asic3_write_register(asic, ASIC3_GPIO_OFFSET(D, MASK), 0xffff);
+
+	for (i = 0; i < num; i++) {
+		u8 alt, pin, dir, init, bank_num, bit_num;
+		u16 config = gpio_config[i];
+
+		pin = ASIC3_CONFIG_GPIO_PIN(config);
+		alt = ASIC3_CONFIG_GPIO_ALT(config);
+		dir = ASIC3_CONFIG_GPIO_DIR(config);
+		init = ASIC3_CONFIG_GPIO_INIT(config);
+
+		bank_num = ASIC3_GPIO_TO_BANK(pin);
+		bit_num = ASIC3_GPIO_TO_BIT(pin);
+
+		alt_reg[bank_num] |= (alt << bit_num);
+		out_reg[bank_num] |= (init << bit_num);
+		dir_reg[bank_num] |= (dir << bit_num);
+	}
+
+	for (i = 0; i < ASIC3_NUM_GPIO_BANKS; i++) {
+		asic3_write_register(asic,
+				     ASIC3_BANK_TO_BASE(i) +
+				     ASIC3_GPIO_DIRECTION,
+				     dir_reg[i]);
+		asic3_write_register(asic,
+				     ASIC3_BANK_TO_BASE(i) + ASIC3_GPIO_OUT,
+				     out_reg[i]);
+		asic3_write_register(asic,
+				     ASIC3_BANK_TO_BASE(i) +
+				     ASIC3_GPIO_ALT_FUNCTION,
+				     alt_reg[i]);
+	}
+
+	return gpiochip_add_data(&asic->gpio, asic);
+}
+
+static int asic3_gpio_remove(struct platform_device *pdev)
+{
+	struct asic3 *asic = platform_get_drvdata(pdev);
+
+	gpiochip_remove(&asic->gpio);
+	return 0;
+}
+
+static void asic3_clk_enable(struct asic3 *asic, struct asic3_clk *clk)
+{
+	unsigned long flags;
+	u32 cdex;
+
+	raw_spin_lock_irqsave(&asic->lock, flags);
+	if (clk->enabled++ == 0) {
+		cdex = asic3_read_register(asic, ASIC3_OFFSET(CLOCK, CDEX));
+		cdex |= clk->cdex;
+		asic3_write_register(asic, ASIC3_OFFSET(CLOCK, CDEX), cdex);
+	}
+	raw_spin_unlock_irqrestore(&asic->lock, flags);
+}
+
+static void asic3_clk_disable(struct asic3 *asic, struct asic3_clk *clk)
+{
+	unsigned long flags;
+	u32 cdex;
+
+	WARN_ON(clk->enabled == 0);
+
+	raw_spin_lock_irqsave(&asic->lock, flags);
+	if (--clk->enabled == 0) {
+		cdex = asic3_read_register(asic, ASIC3_OFFSET(CLOCK, CDEX));
+		cdex &= ~clk->cdex;
+		asic3_write_register(asic, ASIC3_OFFSET(CLOCK, CDEX), cdex);
+	}
+	raw_spin_unlock_irqrestore(&asic->lock, flags);
+}
+
+/* MFD cells (SPI, PWM, LED, DS1WM, MMC) */
+static struct ds1wm_driver_data ds1wm_pdata = {
+	.active_high = 1,
+	.reset_recover_delay = 1,
+};
+
+static struct resource ds1wm_resources[] = {
+	{
+		.start = ASIC3_OWM_BASE,
+		.end   = ASIC3_OWM_BASE + 0x13,
+		.flags = IORESOURCE_MEM,
+	},
+	{
+		.start = ASIC3_IRQ_OWM,
+		.end   = ASIC3_IRQ_OWM,
+		.flags = IORESOURCE_IRQ | IORESOURCE_IRQ_HIGHEDGE,
+	},
+};
+
+static int ds1wm_enable(struct platform_device *pdev)
+{
+	struct asic3 *asic = dev_get_drvdata(pdev->dev.parent);
+
+	/* Turn on external clocks and the OWM clock */
+	asic3_clk_enable(asic, &asic->clocks[ASIC3_CLOCK_EX0]);
+	asic3_clk_enable(asic, &asic->clocks[ASIC3_CLOCK_EX1]);
+	asic3_clk_enable(asic, &asic->clocks[ASIC3_CLOCK_OWM]);
+	usleep_range(1000, 5000);
+
+	/* Reset and enable DS1WM */
+	asic3_set_register(asic, ASIC3_OFFSET(EXTCF, RESET),
+			   ASIC3_EXTCF_OWM_RESET, 1);
+	usleep_range(1000, 5000);
+	asic3_set_register(asic, ASIC3_OFFSET(EXTCF, RESET),
+			   ASIC3_EXTCF_OWM_RESET, 0);
+	usleep_range(1000, 5000);
+	asic3_set_register(asic, ASIC3_OFFSET(EXTCF, SELECT),
+			   ASIC3_EXTCF_OWM_EN, 1);
+	usleep_range(1000, 5000);
+
+	return 0;
+}
+
+static int ds1wm_disable(struct platform_device *pdev)
+{
+	struct asic3 *asic = dev_get_drvdata(pdev->dev.parent);
+
+	asic3_set_register(asic, ASIC3_OFFSET(EXTCF, SELECT),
+			   ASIC3_EXTCF_OWM_EN, 0);
+
+	asic3_clk_disable(asic, &asic->clocks[ASIC3_CLOCK_OWM]);
+	asic3_clk_disable(asic, &asic->clocks[ASIC3_CLOCK_EX0]);
+	asic3_clk_disable(asic, &asic->clocks[ASIC3_CLOCK_EX1]);
+
+	return 0;
+}
+
+static const struct mfd_cell asic3_cell_ds1wm = {
+	.name          = "ds1wm",
+	.enable        = ds1wm_enable,
+	.disable       = ds1wm_disable,
+	.platform_data = &ds1wm_pdata,
+	.pdata_size    = sizeof(ds1wm_pdata),
+	.num_resources = ARRAY_SIZE(ds1wm_resources),
+	.resources     = ds1wm_resources,
+};
+
+static void asic3_mmc_pwr(struct platform_device *pdev, int state)
+{
+	struct asic3 *asic = dev_get_drvdata(pdev->dev.parent);
+
+	tmio_core_mmc_pwr(asic->tmio_cnf, 1 - asic->bus_shift, state);
+}
+
+static void asic3_mmc_clk_div(struct platform_device *pdev, int state)
+{
+	struct asic3 *asic = dev_get_drvdata(pdev->dev.parent);
+
+	tmio_core_mmc_clk_div(asic->tmio_cnf, 1 - asic->bus_shift, state);
+}
+
+static struct tmio_mmc_data asic3_mmc_data = {
+	.hclk           = 24576000,
+	.ocr_mask	= MMC_VDD_32_33 | MMC_VDD_33_34,
+	.set_pwr        = asic3_mmc_pwr,
+	.set_clk_div    = asic3_mmc_clk_div,
+};
+
+static struct resource asic3_mmc_resources[] = {
+	{
+		.start = ASIC3_SD_CTRL_BASE,
+		.end   = ASIC3_SD_CTRL_BASE + 0x3ff,
+		.flags = IORESOURCE_MEM,
+	},
+	{
+		.start = 0,
+		.end   = 0,
+		.flags = IORESOURCE_IRQ,
+	},
+};
+
+static int asic3_mmc_enable(struct platform_device *pdev)
+{
+	struct asic3 *asic = dev_get_drvdata(pdev->dev.parent);
+
+	/* Not sure if it must be done bit by bit, but leaving as-is */
+	asic3_set_register(asic, ASIC3_OFFSET(SDHWCTRL, SDCONF),
+			   ASIC3_SDHWCTRL_LEVCD, 1);
+	asic3_set_register(asic, ASIC3_OFFSET(SDHWCTRL, SDCONF),
+			   ASIC3_SDHWCTRL_LEVWP, 1);
+	asic3_set_register(asic, ASIC3_OFFSET(SDHWCTRL, SDCONF),
+			   ASIC3_SDHWCTRL_SUSPEND, 0);
+	asic3_set_register(asic, ASIC3_OFFSET(SDHWCTRL, SDCONF),
+			   ASIC3_SDHWCTRL_PCLR, 0);
+
+	asic3_clk_enable(asic, &asic->clocks[ASIC3_CLOCK_EX0]);
+	/* CLK32 used for card detection and for interruption detection
+	 * when HCLK is stopped.
+	 */
+	asic3_clk_enable(asic, &asic->clocks[ASIC3_CLOCK_EX1]);
+	usleep_range(1000, 5000);
+
+	/* HCLK 24.576 MHz, BCLK 12.288 MHz: */
+	asic3_write_register(asic, ASIC3_OFFSET(CLOCK, SEL),
+		CLOCK_SEL_CX | CLOCK_SEL_SD_HCLK_SEL);
+
+	asic3_clk_enable(asic, &asic->clocks[ASIC3_CLOCK_SD_HOST]);
+	asic3_clk_enable(asic, &asic->clocks[ASIC3_CLOCK_SD_BUS]);
+	usleep_range(1000, 5000);
+
+	asic3_set_register(asic, ASIC3_OFFSET(EXTCF, SELECT),
+			   ASIC3_EXTCF_SD_MEM_ENABLE, 1);
+
+	/* Enable SD card slot 3.3V power supply */
+	asic3_set_register(asic, ASIC3_OFFSET(SDHWCTRL, SDCONF),
+			   ASIC3_SDHWCTRL_SDPWR, 1);
+
+	/* ASIC3_SD_CTRL_BASE assumes 32-bit addressing, TMIO is 16-bit */
+	tmio_core_mmc_enable(asic->tmio_cnf, 1 - asic->bus_shift,
+			     ASIC3_SD_CTRL_BASE >> 1);
+
+	return 0;
+}
+
+static int asic3_mmc_disable(struct platform_device *pdev)
+{
+	struct asic3 *asic = dev_get_drvdata(pdev->dev.parent);
+
+	/* Put in suspend mode */
+	asic3_set_register(asic, ASIC3_OFFSET(SDHWCTRL, SDCONF),
+			   ASIC3_SDHWCTRL_SUSPEND, 1);
+
+	/* Disable clocks */
+	asic3_clk_disable(asic, &asic->clocks[ASIC3_CLOCK_SD_HOST]);
+	asic3_clk_disable(asic, &asic->clocks[ASIC3_CLOCK_SD_BUS]);
+	asic3_clk_disable(asic, &asic->clocks[ASIC3_CLOCK_EX0]);
+	asic3_clk_disable(asic, &asic->clocks[ASIC3_CLOCK_EX1]);
+	return 0;
+}
+
+static const struct mfd_cell asic3_cell_mmc = {
+	.name          = "tmio-mmc",
+	.enable        = asic3_mmc_enable,
+	.disable       = asic3_mmc_disable,
+	.suspend       = asic3_mmc_disable,
+	.resume        = asic3_mmc_enable,
+	.platform_data = &asic3_mmc_data,
+	.pdata_size    = sizeof(asic3_mmc_data),
+	.num_resources = ARRAY_SIZE(asic3_mmc_resources),
+	.resources     = asic3_mmc_resources,
+};
+
+static const int clock_ledn[ASIC3_NUM_LEDS] = {
+	[0] = ASIC3_CLOCK_LED0,
+	[1] = ASIC3_CLOCK_LED1,
+	[2] = ASIC3_CLOCK_LED2,
+};
+
+static int asic3_leds_enable(struct platform_device *pdev)
+{
+	const struct mfd_cell *cell = mfd_get_cell(pdev);
+	struct asic3 *asic = dev_get_drvdata(pdev->dev.parent);
+
+	asic3_clk_enable(asic, &asic->clocks[clock_ledn[cell->id]]);
+
+	return 0;
+}
+
+static int asic3_leds_disable(struct platform_device *pdev)
+{
+	const struct mfd_cell *cell = mfd_get_cell(pdev);
+	struct asic3 *asic = dev_get_drvdata(pdev->dev.parent);
+
+	asic3_clk_disable(asic, &asic->clocks[clock_ledn[cell->id]]);
+
+	return 0;
+}
+
+static int asic3_leds_suspend(struct platform_device *pdev)
+{
+	const struct mfd_cell *cell = mfd_get_cell(pdev);
+	struct asic3 *asic = dev_get_drvdata(pdev->dev.parent);
+
+	while (asic3_gpio_get(&asic->gpio, ASIC3_GPIO(C, cell->id)) != 0)
+		usleep_range(1000, 5000);
+
+	asic3_clk_disable(asic, &asic->clocks[clock_ledn[cell->id]]);
+
+	return 0;
+}
+
+static struct mfd_cell asic3_cell_leds[ASIC3_NUM_LEDS] = {
+	[0] = {
+		.name          = "leds-asic3",
+		.id            = 0,
+		.enable        = asic3_leds_enable,
+		.disable       = asic3_leds_disable,
+		.suspend       = asic3_leds_suspend,
+		.resume        = asic3_leds_enable,
+	},
+	[1] = {
+		.name          = "leds-asic3",
+		.id            = 1,
+		.enable        = asic3_leds_enable,
+		.disable       = asic3_leds_disable,
+		.suspend       = asic3_leds_suspend,
+		.resume        = asic3_leds_enable,
+	},
+	[2] = {
+		.name          = "leds-asic3",
+		.id            = 2,
+		.enable        = asic3_leds_enable,
+		.disable       = asic3_leds_disable,
+		.suspend       = asic3_leds_suspend,
+		.resume        = asic3_leds_enable,
+	},
+};
+
+static int __init asic3_mfd_probe(struct platform_device *pdev,
+				  struct asic3_platform_data *pdata,
+				  struct resource *mem)
+{
+	struct asic3 *asic = platform_get_drvdata(pdev);
+	struct resource *mem_sdio;
+	int irq, ret;
+
+	mem_sdio = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+	if (!mem_sdio)
+		dev_dbg(asic->dev, "no SDIO MEM resource\n");
+
+	irq = platform_get_irq(pdev, 1);
+	if (irq < 0)
+		dev_dbg(asic->dev, "no SDIO IRQ resource\n");
+
+	/* DS1WM */
+	asic3_set_register(asic, ASIC3_OFFSET(EXTCF, SELECT),
+			   ASIC3_EXTCF_OWM_SMB, 0);
+
+	ds1wm_resources[0].start >>= asic->bus_shift;
+	ds1wm_resources[0].end   >>= asic->bus_shift;
+
+	/* MMC */
+	if (mem_sdio) {
+		asic->tmio_cnf = ioremap((ASIC3_SD_CONFIG_BASE >>
+					  asic->bus_shift) + mem_sdio->start,
+				 ASIC3_SD_CONFIG_SIZE >> asic->bus_shift);
+		if (!asic->tmio_cnf) {
+			ret = -ENOMEM;
+			dev_dbg(asic->dev, "Couldn't ioremap SD_CONFIG\n");
+			goto out;
+		}
+	}
+	asic3_mmc_resources[0].start >>= asic->bus_shift;
+	asic3_mmc_resources[0].end   >>= asic->bus_shift;
+
+	if (pdata->clock_rate) {
+		ds1wm_pdata.clock_rate = pdata->clock_rate;
+		ret = mfd_add_devices(&pdev->dev, pdev->id,
+			&asic3_cell_ds1wm, 1, mem, asic->irq_base, NULL);
+		if (ret < 0)
+			goto out_unmap;
+	}
+
+	if (mem_sdio && (irq >= 0)) {
+		ret = mfd_add_devices(&pdev->dev, pdev->id,
+			&asic3_cell_mmc, 1, mem_sdio, irq, NULL);
+		if (ret < 0)
+			goto out_unmap;
+	}
+
+	ret = 0;
+	if (pdata->leds) {
+		int i;
+
+		for (i = 0; i < ASIC3_NUM_LEDS; ++i) {
+			asic3_cell_leds[i].platform_data = &pdata->leds[i];
+			asic3_cell_leds[i].pdata_size = sizeof(pdata->leds[i]);
+		}
+		ret = mfd_add_devices(&pdev->dev, 0,
+			asic3_cell_leds, ASIC3_NUM_LEDS, NULL, 0, NULL);
+	}
+	return ret;
+
+out_unmap:
+	if (asic->tmio_cnf)
+		iounmap(asic->tmio_cnf);
+out:
+	return ret;
+}
+
+static void asic3_mfd_remove(struct platform_device *pdev)
+{
+	struct asic3 *asic = platform_get_drvdata(pdev);
+
+	mfd_remove_devices(&pdev->dev);
+	iounmap(asic->tmio_cnf);
+}
+
+/* Core */
+static int __init asic3_probe(struct platform_device *pdev)
+{
+	struct asic3_platform_data *pdata = dev_get_platdata(&pdev->dev);
+	struct asic3 *asic;
+	struct resource *mem;
+	unsigned long clksel;
+	int ret = 0;
+
+	asic = devm_kzalloc(&pdev->dev,
+			    sizeof(struct asic3), GFP_KERNEL);
+	if (!asic)
+		return -ENOMEM;
+
+	raw_spin_lock_init(&asic->lock);
+	platform_set_drvdata(pdev, asic);
+	asic->dev = &pdev->dev;
+
+	mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!mem) {
+		dev_err(asic->dev, "no MEM resource\n");
+		return -ENOMEM;
+	}
+
+	asic->mapping = ioremap(mem->start, resource_size(mem));
+	if (!asic->mapping) {
+		dev_err(asic->dev, "Couldn't ioremap\n");
+		return -ENOMEM;
+	}
+
+	asic->irq_base = pdata->irq_base;
+
+	/* calculate bus shift from mem resource */
+	asic->bus_shift = 2 - (resource_size(mem) >> 12);
+
+	clksel = 0;
+	asic3_write_register(asic, ASIC3_OFFSET(CLOCK, SEL), clksel);
+
+	ret = asic3_irq_probe(pdev);
+	if (ret < 0) {
+		dev_err(asic->dev, "Couldn't probe IRQs\n");
+		goto out_unmap;
+	}
+
+	asic->gpio.label = "asic3";
+	asic->gpio.base = pdata->gpio_base;
+	asic->gpio.ngpio = ASIC3_NUM_GPIOS;
+	asic->gpio.get = asic3_gpio_get;
+	asic->gpio.set = asic3_gpio_set;
+	asic->gpio.direction_input = asic3_gpio_direction_input;
+	asic->gpio.direction_output = asic3_gpio_direction_output;
+	asic->gpio.to_irq = asic3_gpio_to_irq;
+
+	ret = asic3_gpio_probe(pdev,
+			       pdata->gpio_config,
+			       pdata->gpio_config_num);
+	if (ret < 0) {
+		dev_err(asic->dev, "GPIO probe failed\n");
+		goto out_irq;
+	}
+
+	/* Making a per-device copy is only needed for the
+	 * theoretical case of multiple ASIC3s on one board:
+	 */
+	memcpy(asic->clocks, asic3_clk_init, sizeof(asic3_clk_init));
+
+	asic3_mfd_probe(pdev, pdata, mem);
+
+	asic3_set_register(asic, ASIC3_OFFSET(EXTCF, SELECT),
+		(ASIC3_EXTCF_CF0_BUF_EN|ASIC3_EXTCF_CF0_PWAIT_EN), 1);
+
+	dev_info(asic->dev, "ASIC3 Core driver\n");
+
+	return 0;
+
+ out_irq:
+	asic3_irq_remove(pdev);
+
+ out_unmap:
+	iounmap(asic->mapping);
+
+	return ret;
+}
+
+static int asic3_remove(struct platform_device *pdev)
+{
+	int ret;
+	struct asic3 *asic = platform_get_drvdata(pdev);
+
+	asic3_set_register(asic, ASIC3_OFFSET(EXTCF, SELECT),
+		(ASIC3_EXTCF_CF0_BUF_EN|ASIC3_EXTCF_CF0_PWAIT_EN), 0);
+
+	asic3_mfd_remove(pdev);
+
+	ret = asic3_gpio_remove(pdev);
+	if (ret < 0)
+		return ret;
+	asic3_irq_remove(pdev);
+
+	asic3_write_register(asic, ASIC3_OFFSET(CLOCK, SEL), 0);
+
+	iounmap(asic->mapping);
+
+	return 0;
+}
+
+static void asic3_shutdown(struct platform_device *pdev)
+{
+}
+
+static struct platform_driver asic3_device_driver = {
+	.driver		= {
+		.name	= "asic3",
+	},
+	.remove		= asic3_remove,
+	.shutdown	= asic3_shutdown,
+};
+
+static int __init asic3_init(void)
+{
+	int retval = 0;
+
+	retval = platform_driver_probe(&asic3_device_driver, asic3_probe);
+
+	return retval;
+}
+
+subsys_initcall(asic3_init);