Merge branch 'for-linus' of git://git.o-hand.com/linux-mfd

* 'for-linus' of git://git.o-hand.com/linux-mfd:
  mfd: let asic3 use mem resource instead of bus_shift
  mfd: remove DS1WM register definitions from asic3.h
  mfd: add ASIC3_CONFIG_GPIO templates
  mfd: fix the asic3 irq demux code
  mfd: asic3 should depend on gpiolib
  mfd: fix asic3 config array initialisation
  mfd: move asic3 probe functions into __init section
  mfd: Use uppercase only for asic3 macros and defines
  mfd: use dev_* macros for asic3 debugging
  mfd: New asic3 gpio configuration code
  mfd: asic3 children platform data removal
  mfd: asic3 gpiolib support

drivers/mfd/Kconfig

@@ -17,7 +17,7 @@ config MFD_SM501
 
 config MFD_ASIC3
 	bool "Support for Compaq ASIC3"
-	depends on GENERIC_HARDIRQS && ARM
+	depends on GENERIC_HARDIRQS && HAVE_GPIO_LIB && ARM
 	 ---help---
 	  This driver supports the ASIC3 multifunction chip found on many
 	  PDAs (mainly iPAQ and HTC based ones)

drivers/mfd/asic3.c

@@ -9,7 +9,7 @@
  *
  * Copyright 2001 Compaq Computer Corporation.
  * Copyright 2004-2005 Phil Blundell
- * Copyright 2007 OpenedHand Ltd.
+ * Copyright 2007-2008 OpenedHand Ltd.
  *
  * Authors: Phil Blundell <pb@handhelds.org>,
  *	    Samuel Ortiz <sameo@openedhand.com>
@@ -19,12 +19,26 @@
 #include <linux/version.h>
 #include <linux/kernel.h>
 #include <linux/irq.h>
+#include <linux/gpio.h>
 #include <linux/io.h>
 #include <linux/spinlock.h>
 #include <linux/platform_device.h>
 
 #include <linux/mfd/asic3.h>
 
+struct asic3 {
+	void __iomem *mapping;
+	unsigned int bus_shift;
+	unsigned int irq_nr;
+	unsigned int irq_base;
+	spinlock_t lock;
+	u16 irq_bothedge[4];
+	struct gpio_chip gpio;
+	struct device *dev;
+};
+
+static int asic3_gpio_get(struct gpio_chip *chip, unsigned offset);
+
 static inline void asic3_write_register(struct asic3 *asic,
 				 unsigned int reg, u32 value)
 {
@@ -41,8 +55,8 @@ static inline u32 asic3_read_register(struct asic3 *asic,
 
 /* IRQs */
 #define MAX_ASIC_ISR_LOOPS    20
-#define ASIC3_GPIO_Base_INCR \
-	(ASIC3_GPIO_B_Base - ASIC3_GPIO_A_Base)
+#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)
@@ -52,10 +66,10 @@ static void asic3_irq_flip_edge(struct asic3 *asic,
 
 	spin_lock_irqsave(&asic->lock, flags);
 	edge = asic3_read_register(asic,
-				   base + ASIC3_GPIO_EdgeTrigger);
+				   base + ASIC3_GPIO_EDGE_TRIGGER);
 	edge ^= bit;
 	asic3_write_register(asic,
-			     base + ASIC3_GPIO_EdgeTrigger, edge);
+			     base + ASIC3_GPIO_EDGE_TRIGGER, edge);
 	spin_unlock_irqrestore(&asic->lock, flags);
 }
 
@@ -75,7 +89,7 @@ static void asic3_irq_demux(unsigned int irq, struct irq_desc *desc)
 
 		spin_lock_irqsave(&asic->lock, flags);
 		status = asic3_read_register(asic,
-					     ASIC3_OFFSET(INTR, PIntStat));
+					     ASIC3_OFFSET(INTR, P_INT_STAT));
 		spin_unlock_irqrestore(&asic->lock, flags);
 
 		/* Check all ten register bits */
@@ -87,17 +101,17 @@ static void asic3_irq_demux(unsigned int irq, struct irq_desc *desc)
 			if (status & (1 << bank)) {
 				unsigned long base, istat;
 
-				base = ASIC3_GPIO_A_Base
-				       + bank * ASIC3_GPIO_Base_INCR;
+				base = ASIC3_GPIO_A_BASE
+				       + bank * ASIC3_GPIO_BASE_INCR;
 
 				spin_lock_irqsave(&asic->lock, flags);
 				istat = asic3_read_register(asic,
 							    base +
-							    ASIC3_GPIO_IntStatus);
+							    ASIC3_GPIO_INT_STATUS);
 				/* Clearing IntStatus */
 				asic3_write_register(asic,
 						     base +
-						     ASIC3_GPIO_IntStatus, 0);
+						     ASIC3_GPIO_INT_STATUS, 0);
 				spin_unlock_irqrestore(&asic->lock, flags);
 
 				for (i = 0; i < ASIC3_GPIOS_PER_BANK; i++) {
@@ -123,7 +137,7 @@ static void asic3_irq_demux(unsigned int irq, struct irq_desc *desc)
 		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))) {
-				desc = irq_desc +  + i;
+				desc = irq_desc + asic->irq_base + i;
 				desc->handle_irq(asic->irq_base + i,
 						 desc);
 			}
@@ -131,8 +145,7 @@ static void asic3_irq_demux(unsigned int irq, struct irq_desc *desc)
 	}
 
 	if (iter >= MAX_ASIC_ISR_LOOPS)
-		printk(KERN_ERR "%s: interrupt processing overrun\n",
-		       __func__);
+		dev_err(asic->dev, "interrupt processing overrun\n");
 }
 
 static inline int asic3_irq_to_bank(struct asic3 *asic, int irq)
@@ -141,7 +154,7 @@ static inline int asic3_irq_to_bank(struct asic3 *asic, int irq)
 
 	n = (irq - asic->irq_base) >> 4;
 
-	return (n * (ASIC3_GPIO_B_Base - ASIC3_GPIO_A_Base));
+	return (n * (ASIC3_GPIO_B_BASE - ASIC3_GPIO_A_BASE));
 }
 
 static inline int asic3_irq_to_index(struct asic3 *asic, int irq)
@@ -159,9 +172,9 @@ static void asic3_mask_gpio_irq(unsigned int irq)
 	index = asic3_irq_to_index(asic, irq);
 
 	spin_lock_irqsave(&asic->lock, flags);
-	val = asic3_read_register(asic, bank + ASIC3_GPIO_Mask);
+	val = asic3_read_register(asic, bank + ASIC3_GPIO_MASK);
 	val |= 1 << index;
-	asic3_write_register(asic, bank + ASIC3_GPIO_Mask, val);
+	asic3_write_register(asic, bank + ASIC3_GPIO_MASK, val);
 	spin_unlock_irqrestore(&asic->lock, flags);
 }
 
@@ -173,15 +186,15 @@ static void asic3_mask_irq(unsigned int irq)
 
 	spin_lock_irqsave(&asic->lock, flags);
 	regval = asic3_read_register(asic,
-				     ASIC3_INTR_Base +
-				     ASIC3_INTR_IntMask);
+				     ASIC3_INTR_BASE +
+				     ASIC3_INTR_INT_MASK);
 
 	regval &= ~(ASIC3_INTMASK_MASK0 <<
 		    (irq - (asic->irq_base + ASIC3_NUM_GPIOS)));
 
 	asic3_write_register(asic,
-			     ASIC3_INTR_Base +
-			     ASIC3_INTR_IntMask,
+			     ASIC3_INTR_BASE +
+			     ASIC3_INTR_INT_MASK,
 			     regval);
 	spin_unlock_irqrestore(&asic->lock, flags);
 }
@@ -196,9 +209,9 @@ static void asic3_unmask_gpio_irq(unsigned int irq)
 	index = asic3_irq_to_index(asic, irq);
 
 	spin_lock_irqsave(&asic->lock, flags);
-	val = asic3_read_register(asic, bank + ASIC3_GPIO_Mask);
+	val = asic3_read_register(asic, bank + ASIC3_GPIO_MASK);
 	val &= ~(1 << index);
-	asic3_write_register(asic, bank + ASIC3_GPIO_Mask, val);
+	asic3_write_register(asic, bank + ASIC3_GPIO_MASK, val);
 	spin_unlock_irqrestore(&asic->lock, flags);
 }
 
@@ -210,15 +223,15 @@ static void asic3_unmask_irq(unsigned int irq)
 
 	spin_lock_irqsave(&asic->lock, flags);
 	regval = asic3_read_register(asic,
-				     ASIC3_INTR_Base +
-				     ASIC3_INTR_IntMask);
+				     ASIC3_INTR_BASE +
+				     ASIC3_INTR_INT_MASK);
 
 	regval |= (ASIC3_INTMASK_MASK0 <<
 		   (irq - (asic->irq_base + ASIC3_NUM_GPIOS)));
 
 	asic3_write_register(asic,
-			     ASIC3_INTR_Base +
-			     ASIC3_INTR_IntMask,
+			     ASIC3_INTR_BASE +
+			     ASIC3_INTR_INT_MASK,
 			     regval);
 	spin_unlock_irqrestore(&asic->lock, flags);
 }
@@ -236,11 +249,11 @@ static int asic3_gpio_irq_type(unsigned int irq, unsigned int type)
 
 	spin_lock_irqsave(&asic->lock, flags);
 	level = asic3_read_register(asic,
-				    bank + ASIC3_GPIO_LevelTrigger);
+				    bank + ASIC3_GPIO_LEVEL_TRIGGER);
 	edge = asic3_read_register(asic,
-				   bank + ASIC3_GPIO_EdgeTrigger);
+				   bank + ASIC3_GPIO_EDGE_TRIGGER);
 	trigger = asic3_read_register(asic,
-				      bank + ASIC3_GPIO_TriggerType);
+				      bank + ASIC3_GPIO_TRIGGER_TYPE);
 	asic->irq_bothedge[(irq - asic->irq_base) >> 4] &= ~bit;
 
 	if (type == IRQT_RISING) {
@@ -251,7 +264,7 @@ static int asic3_gpio_irq_type(unsigned int irq, unsigned int type)
 		edge &= ~bit;
 	} else if (type == IRQT_BOTHEDGE) {
 		trigger |= bit;
-		if (asic3_gpio_get_value(asic, irq - asic->irq_base))
+		if (asic3_gpio_get(&asic->gpio, irq - asic->irq_base))
 			edge &= ~bit;
 		else
 			edge |= bit;
@@ -268,13 +281,13 @@ static int asic3_gpio_irq_type(unsigned int irq, unsigned int type)
 		 * be careful to not unmask them if mask was also called.
 		 * Probably need internal state for mask.
 		 */
-		printk(KERN_NOTICE "asic3: irq type not changed.\n");
+		dev_notice(asic->dev, "irq type not changed\n");
 	}
-	asic3_write_register(asic, bank + ASIC3_GPIO_LevelTrigger,
+	asic3_write_register(asic, bank + ASIC3_GPIO_LEVEL_TRIGGER,
 			     level);
-	asic3_write_register(asic, bank + ASIC3_GPIO_EdgeTrigger,
+	asic3_write_register(asic, bank + ASIC3_GPIO_EDGE_TRIGGER,
 			     edge);
-	asic3_write_register(asic, bank + ASIC3_GPIO_TriggerType,
+	asic3_write_register(asic, bank + ASIC3_GPIO_TRIGGER_TYPE,
 			     trigger);
 	spin_unlock_irqrestore(&asic->lock, flags);
 	return 0;
@@ -295,11 +308,12 @@ static struct irq_chip asic3_irq_chip = {
 	.unmask		= asic3_unmask_irq,
 };
 
-static int asic3_irq_probe(struct platform_device *pdev)
+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 map_size;
 
 	asic->irq_nr = platform_get_irq(pdev, 0);
 	if (asic->irq_nr < 0)
@@ -323,7 +337,7 @@ static int asic3_irq_probe(struct platform_device *pdev)
 		set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
 	}
 
-	asic3_write_register(asic, ASIC3_OFFSET(INTR, IntMask),
+	asic3_write_register(asic, ASIC3_OFFSET(INTR, INT_MASK),
 			     ASIC3_INTMASK_GINTMASK);
 
 	set_irq_chained_handler(asic->irq_nr, asic3_irq_demux);
@@ -350,149 +364,182 @@ static void asic3_irq_remove(struct platform_device *pdev)
 }
 
 /* GPIOs */
-static inline u32 asic3_get_gpio(struct asic3 *asic, unsigned int base,
-				 unsigned int function)
-{
-	return asic3_read_register(asic, base + function);
-}
-
-static void asic3_set_gpio(struct asic3 *asic, unsigned int base,
-			   unsigned int function, u32 bits, u32 val)
+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 = container_of(chip, struct asic3, gpio);
+	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;
+	}
 
 	spin_lock_irqsave(&asic->lock, flags);
-	val |= (asic3_read_register(asic, base + function) & ~bits);
 
-	asic3_write_register(asic, base + function, val);
+	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);
+
 	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);
 }
 
-#define asic3_get_gpio_a(asic, fn) \
-	asic3_get_gpio(asic, ASIC3_GPIO_A_Base, ASIC3_GPIO_##fn)
-#define asic3_get_gpio_b(asic, fn) \
-	asic3_get_gpio(asic, ASIC3_GPIO_B_Base, ASIC3_GPIO_##fn)
-#define asic3_get_gpio_c(asic, fn) \
-	asic3_get_gpio(asic, ASIC3_GPIO_C_Base, ASIC3_GPIO_##fn)
-#define asic3_get_gpio_d(asic, fn) \
-	asic3_get_gpio(asic, ASIC3_GPIO_D_Base, ASIC3_GPIO_##fn)
-
-#define asic3_set_gpio_a(asic, fn, bits, val) \
-	asic3_set_gpio(asic, ASIC3_GPIO_A_Base, ASIC3_GPIO_##fn, bits, val)
-#define asic3_set_gpio_b(asic, fn, bits, val) \
-	asic3_set_gpio(asic, ASIC3_GPIO_B_Base, ASIC3_GPIO_##fn, bits, val)
-#define asic3_set_gpio_c(asic, fn, bits, val) \
-	asic3_set_gpio(asic, ASIC3_GPIO_C_Base, ASIC3_GPIO_##fn, bits, val)
-#define asic3_set_gpio_d(asic, fn, bits, val) \
-	asic3_set_gpio(asic, ASIC3_GPIO_D_Base, ASIC3_GPIO_##fn, bits, val)
-
-#define asic3_set_gpio_banks(asic, fn, bits, pdata, field) 		  \
-	do {								  \
-	     asic3_set_gpio_a((asic), fn, (bits), (pdata)->gpio_a.field); \
-	     asic3_set_gpio_b((asic), fn, (bits), (pdata)->gpio_b.field); \
-	     asic3_set_gpio_c((asic), fn, (bits), (pdata)->gpio_c.field); \
-	     asic3_set_gpio_d((asic), fn, (bits), (pdata)->gpio_d.field); \
-	} while (0)
-
-int asic3_gpio_get_value(struct asic3 *asic, unsigned gpio)
+static int asic3_gpio_get(struct gpio_chip *chip,
+			  unsigned offset)
 {
-	u32 mask = ASIC3_GPIO_bit(gpio);
-
-	switch (gpio >> 4) {
-	case ASIC3_GPIO_BANK_A:
-		return asic3_get_gpio_a(asic, Status) & mask;
-	case ASIC3_GPIO_BANK_B:
-		return asic3_get_gpio_b(asic, Status) & mask;
-	case ASIC3_GPIO_BANK_C:
-		return asic3_get_gpio_c(asic, Status) & mask;
-	case ASIC3_GPIO_BANK_D:
-		return asic3_get_gpio_d(asic, Status) & mask;
-	default:
-		printk(KERN_ERR "%s: invalid GPIO value 0x%x",
-		       __func__, gpio);
+	unsigned int gpio_base;
+	u32 mask = ASIC3_GPIO_TO_MASK(offset);
+	struct asic3 *asic;
+
+	asic = container_of(chip, struct asic3, gpio);
+	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;
 }
-EXPORT_SYMBOL(asic3_gpio_get_value);
 
-void asic3_gpio_set_value(struct asic3 *asic, unsigned gpio, int val)
+static void asic3_gpio_set(struct gpio_chip *chip,
+			   unsigned offset, int value)
 {
-	u32 mask = ASIC3_GPIO_bit(gpio);
-	u32 bitval = 0;
-	if (val)
-		bitval = mask;
-
-	switch (gpio >> 4) {
-	case ASIC3_GPIO_BANK_A:
-		asic3_set_gpio_a(asic, Out, mask, bitval);
-		return;
-	case ASIC3_GPIO_BANK_B:
-		asic3_set_gpio_b(asic, Out, mask, bitval);
-		return;
-	case ASIC3_GPIO_BANK_C:
-		asic3_set_gpio_c(asic, Out, mask, bitval);
-		return;
-	case ASIC3_GPIO_BANK_D:
-		asic3_set_gpio_d(asic, Out, mask, bitval);
-		return;
-	default:
-		printk(KERN_ERR "%s: invalid GPIO value 0x%x",
-		       __func__, gpio);
+	u32 mask, out_reg;
+	unsigned int gpio_base;
+	unsigned long flags;
+	struct asic3 *asic;
+
+	asic = container_of(chip, struct asic3, gpio);
+	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);
+
+	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);
+
+	spin_unlock_irqrestore(&asic->lock, flags);
+
+	return;
 }
-EXPORT_SYMBOL(asic3_gpio_set_value);
 
-static int asic3_gpio_probe(struct platform_device *pdev)
+static __init int asic3_gpio_probe(struct platform_device *pdev,
+				   u16 *gpio_config, int num)
 {
-	struct asic3_platform_data *pdata = pdev->dev.platform_data;
 	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;
+
+	memzero(alt_reg, ASIC3_NUM_GPIO_BANKS * sizeof(u16));
+	memzero(out_reg, ASIC3_NUM_GPIO_BANKS * sizeof(u16));
+	memzero(dir_reg, 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);
 
-	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);
-
-	asic3_set_gpio_a(asic, SleepMask, 0xffff, 0xffff);
-	asic3_set_gpio_b(asic, SleepMask, 0xffff, 0xffff);
-	asic3_set_gpio_c(asic, SleepMask, 0xffff, 0xffff);
-	asic3_set_gpio_d(asic, SleepMask, 0xffff, 0xffff);
-
-	if (pdata) {
-		asic3_set_gpio_banks(asic, Out, 0xffff, pdata, init);
-		asic3_set_gpio_banks(asic, Direction, 0xffff, pdata, dir);
-		asic3_set_gpio_banks(asic, SleepMask, 0xffff, pdata,
-				     sleep_mask);
-		asic3_set_gpio_banks(asic, SleepOut, 0xffff, pdata, sleep_out);
-		asic3_set_gpio_banks(asic, BattFaultOut, 0xffff, pdata,
-				     batt_fault_out);
-		asic3_set_gpio_banks(asic, SleepConf, 0xffff, pdata,
-				     sleep_conf);
-		asic3_set_gpio_banks(asic, AltFunction, 0xffff, pdata,
-				     alt_function);
+		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);
 	}
 
-	return 0;
+	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(&asic->gpio);
 }
 
-static void asic3_gpio_remove(struct platform_device *pdev)
+static int asic3_gpio_remove(struct platform_device *pdev)
 {
-	return;
+	struct asic3 *asic = platform_get_drvdata(pdev);
+
+	return gpiochip_remove(&asic->gpio);
 }
 
 
 /* Core */
-static int asic3_probe(struct platform_device *pdev)
+static int __init asic3_probe(struct platform_device *pdev)
 {
 	struct asic3_platform_data *pdata = pdev->dev.platform_data;
 	struct asic3 *asic;
 	struct resource *mem;
 	unsigned long clksel;
-	int ret;
+	int ret = 0;
 
 	asic = kzalloc(sizeof(struct asic3), GFP_KERNEL);
-	if (!asic)
+	if (asic == NULL) {
+		printk(KERN_ERR "kzalloc failed\n");
 		return -ENOMEM;
+	}
 
 	spin_lock_init(&asic->lock);
 	platform_set_drvdata(pdev, asic);
@@ -501,49 +548,58 @@ static int asic3_probe(struct platform_device *pdev)
 	mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	if (!mem) {
 		ret = -ENOMEM;
-		printk(KERN_ERR "asic3: no MEM resource\n");
-		goto err_out_1;
+		dev_err(asic->dev, "no MEM resource\n");
+		goto out_free;
 	}
 
-	asic->mapping = ioremap(mem->start, PAGE_SIZE);
+	map_size = mem->end - mem->start + 1;
+	asic->mapping = ioremap(mem->start, map_size);
 	if (!asic->mapping) {
 		ret = -ENOMEM;
-		printk(KERN_ERR "asic3: couldn't ioremap\n");
-		goto err_out_1;
+		dev_err(asic->dev, "Couldn't ioremap\n");
+		goto out_free;
 	}
 
 	asic->irq_base = pdata->irq_base;
 
-	if (pdata && pdata->bus_shift)
-		asic->bus_shift = 2 - pdata->bus_shift;
-	else
-		asic->bus_shift = 0;
+	/* calculate bus shift from mem resource */
+	asic->bus_shift = 2 - (map_size >> 12);
 
 	clksel = 0;
 	asic3_write_register(asic, ASIC3_OFFSET(CLOCK, SEL), clksel);
 
 	ret = asic3_irq_probe(pdev);
 	if (ret < 0) {
-		printk(KERN_ERR "asic3: couldn't probe IRQs\n");
-		goto err_out_2;
+		dev_err(asic->dev, "Couldn't probe IRQs\n");
+		goto out_unmap;
 	}
-	asic3_gpio_probe(pdev);
 
-	if (pdata->children) {
-		int i;
-		for (i = 0; i < pdata->n_children; i++) {
-			pdata->children[i]->dev.parent = &pdev->dev;
-			platform_device_register(pdata->children[i]);
-		}
+	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;
+
+	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;
 	}
 
-	printk(KERN_INFO "ASIC3 Core driver\n");
+	dev_info(asic->dev, "ASIC3 Core driver\n");
 
 	return 0;
 
- err_out_2:
+ out_irq:
+	asic3_irq_remove(pdev);
+
+ out_unmap:
 	iounmap(asic->mapping);
- err_out_1:
+
+ out_free:
 	kfree(asic);
 
 	return ret;
@@ -551,9 +607,12 @@ static int asic3_probe(struct platform_device *pdev)
 
 static int asic3_remove(struct platform_device *pdev)
 {
+	int ret;
 	struct asic3 *asic = platform_get_drvdata(pdev);
 
-	asic3_gpio_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);
@@ -573,7 +632,6 @@ static struct platform_driver asic3_device_driver = {
 	.driver		= {
 		.name	= "asic3",
 	},
-	.probe		= asic3_probe,
 	.remove		= __devexit_p(asic3_remove),
 	.shutdown	= asic3_shutdown,
 };
@@ -581,7 +639,7 @@ static struct platform_driver asic3_device_driver = {
 static int __init asic3_init(void)
 {
 	int retval = 0;
-	retval = platform_driver_register(&asic3_device_driver);
+	retval = platform_driver_probe(&asic3_device_driver, asic3_probe);
 	return retval;
 }
 

include/linux/mfd/asic3.h

@@ -8,7 +8,7 @@
  * published by the Free Software Foundation.
  *
  * Copyright 2001 Compaq Computer Corporation.
- * Copyright 2007 OpendHand.
+ * Copyright 2007-2008 OpenedHand Ltd.
  */
 
 #ifndef __ASIC3_H__
@@ -16,43 +16,22 @@
 
 #include <linux/types.h>
 
-struct asic3 {
-	void __iomem *mapping;
-	unsigned int bus_shift;
-	unsigned int irq_nr;
-	unsigned int irq_base;
-	spinlock_t lock;
-	u16 irq_bothedge[4];
-	struct device *dev;
-};
-
 struct asic3_platform_data {
-	struct {
-		u32 dir;
-		u32 init;
-		u32 sleep_mask;
-		u32 sleep_out;
-		u32 batt_fault_out;
-		u32 sleep_conf;
-		u32 alt_function;
-	} gpio_a, gpio_b, gpio_c, gpio_d;
-
-	unsigned int bus_shift;
+	u16 *gpio_config;
+	unsigned int gpio_config_num;
 
 	unsigned int irq_base;
 
-	struct platform_device **children;
-	unsigned int n_children;
+	unsigned int gpio_base;
 };
 
-int asic3_gpio_get_value(struct asic3 *asic, unsigned gpio);
-void asic3_gpio_set_value(struct asic3 *asic, unsigned gpio, int val);
-
 #define ASIC3_NUM_GPIO_BANKS	4
 #define ASIC3_GPIOS_PER_BANK	16
 #define ASIC3_NUM_GPIOS		64
 #define ASIC3_NR_IRQS		ASIC3_NUM_GPIOS + 6
 
+#define ASIC3_TO_GPIO(gpio) (NR_BUILTIN_GPIO + (gpio))
+
 #define ASIC3_GPIO_BANK_A	0
 #define ASIC3_GPIO_BANK_B	1
 #define ASIC3_GPIO_BANK_C	2
@@ -64,32 +43,89 @@ void asic3_gpio_set_value(struct asic3 *asic, unsigned gpio, int val);
 /* All offsets below are specified with this address bus shift */
 #define ASIC3_DEFAULT_ADDR_SHIFT 2
 
-#define ASIC3_OFFSET(base, reg) (ASIC3_##base##_Base + ASIC3_##base##_##reg)
+#define ASIC3_OFFSET(base, reg) (ASIC3_##base##_BASE + ASIC3_##base##_##reg)
 #define ASIC3_GPIO_OFFSET(base, reg) \
-	(ASIC3_GPIO_##base##_Base + ASIC3_GPIO_##reg)
-
-#define ASIC3_GPIO_A_Base      0x0000
-#define ASIC3_GPIO_B_Base      0x0100
-#define ASIC3_GPIO_C_Base      0x0200
-#define ASIC3_GPIO_D_Base      0x0300
-
-#define ASIC3_GPIO_Mask          0x00    /* R/W 0:don't mask */
-#define ASIC3_GPIO_Direction     0x04    /* R/W 0:input */
-#define ASIC3_GPIO_Out           0x08    /* R/W 0:output low */
-#define ASIC3_GPIO_TriggerType   0x0c    /* R/W 0:level */
-#define ASIC3_GPIO_EdgeTrigger   0x10    /* R/W 0:falling */
-#define ASIC3_GPIO_LevelTrigger  0x14    /* R/W 0:low level detect */
-#define ASIC3_GPIO_SleepMask     0x18    /* R/W 0:don't mask in sleep mode */
-#define ASIC3_GPIO_SleepOut      0x1c    /* R/W level 0:low in sleep mode */
-#define ASIC3_GPIO_BattFaultOut  0x20    /* R/W level 0:low in batt_fault */
-#define ASIC3_GPIO_IntStatus     0x24    /* R/W 0:none, 1:detect */
-#define ASIC3_GPIO_AltFunction   0x28	 /* R/W 1:LED register control */
-#define ASIC3_GPIO_SleepConf     0x2c    /*
+	(ASIC3_GPIO_##base##_BASE + ASIC3_GPIO_##reg)
+
+#define ASIC3_GPIO_A_BASE      0x0000
+#define ASIC3_GPIO_B_BASE      0x0100
+#define ASIC3_GPIO_C_BASE      0x0200
+#define ASIC3_GPIO_D_BASE      0x0300
+
+#define ASIC3_GPIO_TO_BANK(gpio) ((gpio) >> 4)
+#define ASIC3_GPIO_TO_BIT(gpio)  ((gpio) - \
+				  (ASIC3_GPIOS_PER_BANK * ((gpio) >> 4)))
+#define ASIC3_GPIO_TO_MASK(gpio) (1 << ASIC3_GPIO_TO_BIT(gpio))
+#define ASIC3_GPIO_TO_BASE(gpio) (ASIC3_GPIO_A_BASE + (((gpio) >> 4) * 0x0100))
+#define ASIC3_BANK_TO_BASE(bank) (ASIC3_GPIO_A_BASE + ((bank) * 0x100))
+
+#define ASIC3_GPIO_MASK          0x00    /* R/W 0:don't mask */
+#define ASIC3_GPIO_DIRECTION     0x04    /* R/W 0:input */
+#define ASIC3_GPIO_OUT           0x08    /* R/W 0:output low */
+#define ASIC3_GPIO_TRIGGER_TYPE  0x0c    /* R/W 0:level */
+#define ASIC3_GPIO_EDGE_TRIGGER  0x10    /* R/W 0:falling */
+#define ASIC3_GPIO_LEVEL_TRIGGER 0x14    /* R/W 0:low level detect */
+#define ASIC3_GPIO_SLEEP_MASK    0x18    /* R/W 0:don't mask in sleep mode */
+#define ASIC3_GPIO_SLEEP_OUT     0x1c    /* R/W level 0:low in sleep mode */
+#define ASIC3_GPIO_BAT_FAULT_OUT 0x20    /* R/W level 0:low in batt_fault */
+#define ASIC3_GPIO_INT_STATUS    0x24    /* R/W 0:none, 1:detect */
+#define ASIC3_GPIO_ALT_FUNCTION  0x28	 /* R/W 1:LED register control */
+#define ASIC3_GPIO_SLEEP_CONF    0x2c    /*
 					  * R/W bit 1: autosleep
 					  * 0: disable gposlpout in normal mode,
 					  * enable gposlpout in sleep mode.
 					  */
-#define ASIC3_GPIO_Status        0x30    /* R   Pin status */
+#define ASIC3_GPIO_STATUS        0x30    /* R   Pin status */
+
+/*
+ * ASIC3 GPIO config
+ *
+ * Bits 0..6   gpio number
+ * Bits 7..13  Alternate function
+ * Bit  14     Direction
+ * Bit  15     Initial value
+ *
+ */
+#define ASIC3_CONFIG_GPIO_PIN(config) ((config) & 0x7f)
+#define ASIC3_CONFIG_GPIO_ALT(config)  (((config) & (0x7f << 7)) >> 7)
+#define ASIC3_CONFIG_GPIO_DIR(config)  ((config & (1 << 14)) >> 14)
+#define ASIC3_CONFIG_GPIO_INIT(config) ((config & (1 << 15)) >> 15)
+#define ASIC3_CONFIG_GPIO(gpio, alt, dir, init) (((gpio) & 0x7f) \
+	| (((alt) & 0x7f) << 7) | (((dir) & 0x1) << 14) \
+	| (((init) & 0x1) << 15))
+#define ASIC3_CONFIG_GPIO_DEFAULT(gpio, dir, init) \
+	ASIC3_CONFIG_GPIO((gpio), 0, (dir), (init))
+#define ASIC3_CONFIG_GPIO_DEFAULT_OUT(gpio, init) \
+	ASIC3_CONFIG_GPIO((gpio), 0, 1, (init))
+
+/*
+ * Alternate functions
+ */
+#define ASIC3_GPIOA11_PWM0		ASIC3_CONFIG_GPIO(11, 1, 1, 0)
+#define ASIC3_GPIOA12_PWM1		ASIC3_CONFIG_GPIO(12, 1, 1, 0)
+#define ASIC3_GPIOA15_CONTROL_CX	ASIC3_CONFIG_GPIO(15, 1, 1, 0)
+#define ASIC3_GPIOC0_LED0		ASIC3_CONFIG_GPIO(32, 1, 1, 0)
+#define ASIC3_GPIOC1_LED1		ASIC3_CONFIG_GPIO(33, 1, 1, 0)
+#define ASIC3_GPIOC2_LED2		ASIC3_CONFIG_GPIO(34, 1, 1, 0)
+#define ASIC3_GPIOC3_SPI_RXD		ASIC3_CONFIG_GPIO(35, 1, 0, 0)
+#define ASIC3_GPIOC4_CF_nCD		ASIC3_CONFIG_GPIO(36, 1, 0, 0)
+#define ASIC3_GPIOC4_SPI_TXD		ASIC3_CONFIG_GPIO(36, 1, 1, 0)
+#define ASIC3_GPIOC5_SPI_CLK		ASIC3_CONFIG_GPIO(37, 1, 1, 0)
+#define ASIC3_GPIOC5_nCIOW		ASIC3_CONFIG_GPIO(37, 1, 1, 0)
+#define ASIC3_GPIOC6_nCIOR		ASIC3_CONFIG_GPIO(38, 1, 1, 0)
+#define ASIC3_GPIOC7_nPCE_1		ASIC3_CONFIG_GPIO(39, 1, 0, 0)
+#define ASIC3_GPIOC8_nPCE_2		ASIC3_CONFIG_GPIO(40, 1, 0, 0)
+#define ASIC3_GPIOC9_nPOE		ASIC3_CONFIG_GPIO(41, 1, 0, 0)
+#define ASIC3_GPIOC10_nPWE		ASIC3_CONFIG_GPIO(42, 1, 0, 0)
+#define ASIC3_GPIOC11_PSKTSEL		ASIC3_CONFIG_GPIO(43, 1, 0, 0)
+#define ASIC3_GPIOC12_nPREG		ASIC3_CONFIG_GPIO(44, 1, 0, 0)
+#define ASIC3_GPIOC13_nPWAIT		ASIC3_CONFIG_GPIO(45, 1, 1, 0)
+#define ASIC3_GPIOC14_nPIOIS16		ASIC3_CONFIG_GPIO(46, 1, 1, 0)
+#define ASIC3_GPIOC15_nPIOR		ASIC3_CONFIG_GPIO(47, 1, 0, 0)
+#define ASIC3_GPIOD11_nCIOIS16		ASIC3_CONFIG_GPIO(59, 1, 0, 0)
+#define ASIC3_GPIOD12_nCWAIT		ASIC3_CONFIG_GPIO(60, 1, 0, 0)
+#define ASIC3_GPIOD15_nPIOW		ASIC3_CONFIG_GPIO(63, 1, 0, 0)
+
 
 #define ASIC3_SPI_Base		      0x0400
 #define ASIC3_SPI_Control               0x0000
@@ -128,7 +164,7 @@ void asic3_gpio_set_value(struct asic3 *asic, unsigned gpio, int val);
 #define LED_AUTOSTOP	(1 << 5) /* LED ON/OFF auto stop 0:disable, 1:enable */
 #define LED_ALWAYS	(1 << 6) /* LED Interrupt Mask 0:No mask, 1:mask */
 
-#define ASIC3_CLOCK_Base		0x0A00
+#define ASIC3_CLOCK_BASE	   0x0A00
 #define ASIC3_CLOCK_CDEX           0x00
 #define ASIC3_CLOCK_SEL            0x04
 
@@ -159,12 +195,12 @@ void asic3_gpio_set_value(struct asic3 *asic, unsigned gpio, int val);
 #define CLOCK_SEL_CX            (1 << 2)
 
 
-#define ASIC3_INTR_Base		0x0B00
+#define ASIC3_INTR_BASE		0x0B00
 
-#define ASIC3_INTR_IntMask       0x00  /* Interrupt mask control */
-#define ASIC3_INTR_PIntStat      0x04  /* Peripheral interrupt status */
-#define ASIC3_INTR_IntCPS        0x08  /* Interrupt timer clock pre-scale */
-#define ASIC3_INTR_IntTBS        0x0c  /* Interrupt timer set */
+#define ASIC3_INTR_INT_MASK       0x00  /* Interrupt mask control */
+#define ASIC3_INTR_P_INT_STAT     0x04  /* Peripheral interrupt status */
+#define ASIC3_INTR_INT_CPS        0x08  /* Interrupt timer clock pre-scale */
+#define ASIC3_INTR_INT_TBS        0x0c  /* Interrupt timer set */
 
 #define ASIC3_INTMASK_GINTMASK    (1 << 0)  /* Global INTs mask 1:enable */
 #define ASIC3_INTMASK_GINTEL      (1 << 1)  /* 1: rising edge, 0: hi level */
@@ -227,44 +263,12 @@ void asic3_gpio_set_value(struct asic3 *asic, unsigned gpio, int val);
 #define ASIC3_EXTCF_CF_SLEEP             (1 << 15) /* CF sleep mode control */
 
 /*********************************************
- *  The Onewire interface registers
- *
- *  OWM_CMD
- *  OWM_DAT
- *  OWM_INTR
- *  OWM_INTEN
- *  OWM_CLKDIV
+ *  The Onewire interface (DS1WM) is handled
+ *  by the ds1wm driver.
  *
  *********************************************/
 
-#define ASIC3_OWM_Base		0xC00
-
-#define ASIC3_OWM_CMD         0x00
-#define ASIC3_OWM_DAT         0x04
-#define ASIC3_OWM_INTR        0x08
-#define ASIC3_OWM_INTEN       0x0C
-#define ASIC3_OWM_CLKDIV      0x10
-
-#define ASIC3_OWM_CMD_ONEWR         (1 << 0)
-#define ASIC3_OWM_CMD_SRA           (1 << 1)
-#define ASIC3_OWM_CMD_DQO           (1 << 2)
-#define ASIC3_OWM_CMD_DQI           (1 << 3)
-
-#define ASIC3_OWM_INTR_PD          (1 << 0)
-#define ASIC3_OWM_INTR_PDR         (1 << 1)
-#define ASIC3_OWM_INTR_TBE         (1 << 2)
-#define ASIC3_OWM_INTR_TEMP        (1 << 3)
-#define ASIC3_OWM_INTR_RBF         (1 << 4)
-
-#define ASIC3_OWM_INTEN_EPD        (1 << 0)
-#define ASIC3_OWM_INTEN_IAS        (1 << 1)
-#define ASIC3_OWM_INTEN_ETBE       (1 << 2)
-#define ASIC3_OWM_INTEN_ETMT       (1 << 3)
-#define ASIC3_OWM_INTEN_ERBF       (1 << 4)
-
-#define ASIC3_OWM_CLKDIV_PRE       (3 << 0) /* two bits wide at bit 0 */
-#define ASIC3_OWM_CLKDIV_DIV       (7 << 2) /* 3 bits wide at bit 2 */
-
+#define ASIC3_OWM_BASE		0xC00
 
 /*****************************************************************************
  *  The SD configuration registers are at a completely different location
@@ -492,6 +496,7 @@ void asic3_gpio_set_value(struct asic3 *asic, unsigned gpio, int val);
 #define ASIC3_SDIO_CTRL_LEDCtrl              0x7C
 #define ASIC3_SDIO_CTRL_SoftwareReset        0x1C0
 
-#define ASIC3_MAP_SIZE	     		     0x2000
+#define ASIC3_MAP_SIZE_32BIT	0x2000
+#define ASIC3_MAP_SIZE_16BIT	0x1000
 
 #endif /* __ASIC3_H__ */