[PATCH 0/8] Utilize iomap interface for PC104 and friends

[PATCH 0/8] Utilize iomap interface for PC104 and friends

[William Breathitt Gray]

PC104 cards and similar devices do not need to access I/O ports directly
via inb()/outb() and can instead use the more typical I/O memory
ioread8()/iowrite8() accessor calls by first calling ioport_map(). This
patchset converts the relevant PC104/ISA card drivers to do such. With
these drivers now utilizing I/O memory accessor calls, work can be done
to consolidate some similar devices (e.g. 104-idio-16, pci-idio-16,
etc.) into a unified driver in a future patchset.

This patchset spawned from a suggestion made in another thread titled
"gpio: add HAS_IOPORT dependencies":
https://lore.kernel.org/all/c3a3cdd99d4645e2bbbe082808cbb2a5@AcuMS.aculab.com/

William Breathitt Gray (8):
  counter: 104-quad-8: Utilize iomap interface
  gpio: 104-dio-48e: Utilize iomap interface
  gpio: 104-idi-48: Utilize iomap interface
  gpio: 104-idio-16: Utilize iomap interface
  gpio: gpio-mm: Utilize iomap interface
  gpio: ws16c48: Utilize iomap interface
  iio: adc: stx104: Utilize iomap interface
  iio: dac: cio-dac: Utilize iomap interface

 drivers/counter/104-quad-8.c    | 169 +++++++++++++++++---------------
 drivers/gpio/gpio-104-dio-48e.c |  63 ++++++------
 drivers/gpio/gpio-104-idi-48.c  |  27 ++---
 drivers/gpio/gpio-104-idio-16.c |  33 ++++---
 drivers/gpio/gpio-gpio-mm.c     |  43 ++++----
 drivers/gpio/gpio-ws16c48.c     |  65 ++++++------
 drivers/iio/adc/stx104.c        |  56 ++++++-----
 drivers/iio/dac/cio-dac.c       |  14 +--
 8 files changed, 248 insertions(+), 222 deletions(-)


base-commit: ce522ba9ef7e2d9fb22a39eb3371c0c64e2a433e
-- 
2.35.3

[PATCH 1/8] counter: 104-quad-8: Utilize iomap interface

[William Breathitt Gray]

This driver doesn't need to access I/O ports directly via inb()/outb()
and friends. This patch abstracts such access by calling ioport_map()
to enable the use of more typical ioread8()/iowrite8() I/O memory
accessor calls.

Suggested-by: David Laight <David.Laight@ACULAB.COM>
Cc: Syed Nayyar Waris <syednwaris@gmail.com>
Signed-off-by: William Breathitt Gray <william.gray@linaro.org>
---
 drivers/counter/104-quad-8.c | 169 ++++++++++++++++++-----------------
 1 file changed, 89 insertions(+), 80 deletions(-)

diff --git a/drivers/counter/104-quad-8.c b/drivers/counter/104-quad-8.c
index a17e51d65aca..43dde9abfdcf 100644
--- a/drivers/counter/104-quad-8.c
+++ b/drivers/counter/104-quad-8.c
@@ -63,7 +63,7 @@ struct quad8 {
 	unsigned int synchronous_mode[QUAD8_NUM_COUNTERS];
 	unsigned int index_polarity[QUAD8_NUM_COUNTERS];
 	unsigned int cable_fault_enable;
-	unsigned int base;
+	void __iomem *base;
 };
 
 #define QUAD8_REG_INTERRUPT_STATUS 0x10
@@ -118,8 +118,8 @@ static int quad8_signal_read(struct counter_device *counter,
 	if (signal->id < 16)
 		return -EINVAL;
 
-	state = inb(priv->base + QUAD8_REG_INDEX_INPUT_LEVELS)
-		& BIT(signal->id - 16);
+	state = ioread8(priv->base + QUAD8_REG_INDEX_INPUT_LEVELS) &
+		BIT(signal->id - 16);
 
 	*level = (state) ? COUNTER_SIGNAL_LEVEL_HIGH : COUNTER_SIGNAL_LEVEL_LOW;
 
@@ -130,14 +130,14 @@ static int quad8_count_read(struct counter_device *counter,
 			    struct counter_count *count, u64 *val)
 {
 	struct quad8 *const priv = counter_priv(counter);
-	const int base_offset = priv->base + 2 * count->id;
+	void __iomem *const base_offset = priv->base + 2 * count->id;
 	unsigned int flags;
 	unsigned int borrow;
 	unsigned int carry;
 	unsigned long irqflags;
 	int i;
 
-	flags = inb(base_offset + 1);
+	flags = ioread8(base_offset + 1);
 	borrow = flags & QUAD8_FLAG_BT;
 	carry = !!(flags & QUAD8_FLAG_CT);
 
@@ -147,11 +147,11 @@ static int quad8_count_read(struct counter_device *counter,
 	spin_lock_irqsave(&priv->lock, irqflags);
 
 	/* Reset Byte Pointer; transfer Counter to Output Latch */
-	outb(QUAD8_CTR_RLD | QUAD8_RLD_RESET_BP | QUAD8_RLD_CNTR_OUT,
-	     base_offset + 1);
+	iowrite8(QUAD8_CTR_RLD | QUAD8_RLD_RESET_BP | QUAD8_RLD_CNTR_OUT,
+		 base_offset + 1);
 
 	for (i = 0; i < 3; i++)
-		*val |= (unsigned long)inb(base_offset) << (8 * i);
+		*val |= (unsigned long)ioread8(base_offset) << (8 * i);
 
 	spin_unlock_irqrestore(&priv->lock, irqflags);
 
@@ -162,7 +162,7 @@ static int quad8_count_write(struct counter_device *counter,
 			     struct counter_count *count, u64 val)
 {
 	struct quad8 *const priv = counter_priv(counter);
-	const int base_offset = priv->base + 2 * count->id;
+	void __iomem *const base_offset = priv->base + 2 * count->id;
 	unsigned long irqflags;
 	int i;
 
@@ -173,27 +173,27 @@ static int quad8_count_write(struct counter_device *counter,
 	spin_lock_irqsave(&priv->lock, irqflags);
 
 	/* Reset Byte Pointer */
-	outb(QUAD8_CTR_RLD | QUAD8_RLD_RESET_BP, base_offset + 1);
+	iowrite8(QUAD8_CTR_RLD | QUAD8_RLD_RESET_BP, base_offset + 1);
 
 	/* Counter can only be set via Preset Register */
 	for (i = 0; i < 3; i++)
-		outb(val >> (8 * i), base_offset);
+		iowrite8(val >> (8 * i), base_offset);
 
 	/* Transfer Preset Register to Counter */
-	outb(QUAD8_CTR_RLD | QUAD8_RLD_PRESET_CNTR, base_offset + 1);
+	iowrite8(QUAD8_CTR_RLD | QUAD8_RLD_PRESET_CNTR, base_offset + 1);
 
 	/* Reset Byte Pointer */
-	outb(QUAD8_CTR_RLD | QUAD8_RLD_RESET_BP, base_offset + 1);
+	iowrite8(QUAD8_CTR_RLD | QUAD8_RLD_RESET_BP, base_offset + 1);
 
 	/* Set Preset Register back to original value */
 	val = priv->preset[count->id];
 	for (i = 0; i < 3; i++)
-		outb(val >> (8 * i), base_offset);
+		iowrite8(val >> (8 * i), base_offset);
 
 	/* Reset Borrow, Carry, Compare, and Sign flags */
-	outb(QUAD8_CTR_RLD | QUAD8_RLD_RESET_FLAGS, base_offset + 1);
+	iowrite8(QUAD8_CTR_RLD | QUAD8_RLD_RESET_FLAGS, base_offset + 1);
 	/* Reset Error flag */
-	outb(QUAD8_CTR_RLD | QUAD8_RLD_RESET_E, base_offset + 1);
+	iowrite8(QUAD8_CTR_RLD | QUAD8_RLD_RESET_E, base_offset + 1);
 
 	spin_unlock_irqrestore(&priv->lock, irqflags);
 
@@ -246,7 +246,7 @@ static int quad8_function_write(struct counter_device *counter,
 	unsigned int *const quadrature_mode = priv->quadrature_mode + id;
 	unsigned int *const scale = priv->quadrature_scale + id;
 	unsigned int *const synchronous_mode = priv->synchronous_mode + id;
-	const int base_offset = priv->base + 2 * id + 1;
+	void __iomem *const base_offset = priv->base + 2 * id + 1;
 	unsigned long irqflags;
 	unsigned int mode_cfg;
 	unsigned int idr_cfg;
@@ -266,7 +266,7 @@ static int quad8_function_write(struct counter_device *counter,
 		if (*synchronous_mode) {
 			*synchronous_mode = 0;
 			/* Disable synchronous function mode */
-			outb(QUAD8_CTR_IDR | idr_cfg, base_offset);
+			iowrite8(QUAD8_CTR_IDR | idr_cfg, base_offset);
 		}
 	} else {
 		*quadrature_mode = 1;
@@ -292,7 +292,7 @@ static int quad8_function_write(struct counter_device *counter,
 	}
 
 	/* Load mode configuration to Counter Mode Register */
-	outb(QUAD8_CTR_CMR | mode_cfg, base_offset);
+	iowrite8(QUAD8_CTR_CMR | mode_cfg, base_offset);
 
 	spin_unlock_irqrestore(&priv->lock, irqflags);
 
@@ -305,10 +305,10 @@ static int quad8_direction_read(struct counter_device *counter,
 {
 	const struct quad8 *const priv = counter_priv(counter);
 	unsigned int ud_flag;
-	const unsigned int flag_addr = priv->base + 2 * count->id + 1;
+	void __iomem *const flag_addr = priv->base + 2 * count->id + 1;
 
 	/* U/D flag: nonzero = up, zero = down */
-	ud_flag = inb(flag_addr) & QUAD8_FLAG_UD;
+	ud_flag = ioread8(flag_addr) & QUAD8_FLAG_UD;
 
 	*direction = (ud_flag) ? COUNTER_COUNT_DIRECTION_FORWARD :
 		COUNTER_COUNT_DIRECTION_BACKWARD;
@@ -402,7 +402,7 @@ static int quad8_events_configure(struct counter_device *counter)
 	struct counter_event_node *event_node;
 	unsigned int next_irq_trigger;
 	unsigned long ior_cfg;
-	unsigned long base_offset;
+	void __iomem *base_offset;
 
 	spin_lock_irqsave(&priv->lock, irqflags);
 
@@ -438,13 +438,13 @@ static int quad8_events_configure(struct counter_device *counter)
 			  priv->preset_enable[event_node->channel] << 1 |
 			  priv->irq_trigger[event_node->channel] << 3;
 		base_offset = priv->base + 2 * event_node->channel + 1;
-		outb(QUAD8_CTR_IOR | ior_cfg, base_offset);
+		iowrite8(QUAD8_CTR_IOR | ior_cfg, base_offset);
 
 		/* Enable IRQ line */
 		irq_enabled |= BIT(event_node->channel);
 	}
 
-	outb(irq_enabled, priv->base + QUAD8_REG_INDEX_INTERRUPT);
+	iowrite8(irq_enabled, priv->base + QUAD8_REG_INDEX_INTERRUPT);
 
 	spin_unlock_irqrestore(&priv->lock, irqflags);
 
@@ -508,7 +508,7 @@ static int quad8_index_polarity_set(struct counter_device *counter,
 {
 	struct quad8 *const priv = counter_priv(counter);
 	const size_t channel_id = signal->id - 16;
-	const int base_offset = priv->base + 2 * channel_id + 1;
+	void __iomem *const base_offset = priv->base + 2 * channel_id + 1;
 	unsigned long irqflags;
 	unsigned int idr_cfg = index_polarity << 1;
 
@@ -519,7 +519,7 @@ static int quad8_index_polarity_set(struct counter_device *counter,
 	priv->index_polarity[channel_id] = index_polarity;
 
 	/* Load Index Control configuration to Index Control Register */
-	outb(QUAD8_CTR_IDR | idr_cfg, base_offset);
+	iowrite8(QUAD8_CTR_IDR | idr_cfg, base_offset);
 
 	spin_unlock_irqrestore(&priv->lock, irqflags);
 
@@ -549,7 +549,7 @@ static int quad8_synchronous_mode_set(struct counter_device *counter,
 {
 	struct quad8 *const priv = counter_priv(counter);
 	const size_t channel_id = signal->id - 16;
-	const int base_offset = priv->base + 2 * channel_id + 1;
+	void __iomem *const base_offset = priv->base + 2 * channel_id + 1;
 	unsigned long irqflags;
 	unsigned int idr_cfg = synchronous_mode;
 
@@ -566,7 +566,7 @@ static int quad8_synchronous_mode_set(struct counter_device *counter,
 	priv->synchronous_mode[channel_id] = synchronous_mode;
 
 	/* Load Index Control configuration to Index Control Register */
-	outb(QUAD8_CTR_IDR | idr_cfg, base_offset);
+	iowrite8(QUAD8_CTR_IDR | idr_cfg, base_offset);
 
 	spin_unlock_irqrestore(&priv->lock, irqflags);
 
@@ -614,7 +614,7 @@ static int quad8_count_mode_write(struct counter_device *counter,
 	struct quad8 *const priv = counter_priv(counter);
 	unsigned int count_mode;
 	unsigned int mode_cfg;
-	const int base_offset = priv->base + 2 * count->id + 1;
+	void __iomem *const base_offset = priv->base + 2 * count->id + 1;
 	unsigned long irqflags;
 
 	/* Map Generic Counter count mode to 104-QUAD-8 count mode */
@@ -648,7 +648,7 @@ static int quad8_count_mode_write(struct counter_device *counter,
 		mode_cfg |= (priv->quadrature_scale[count->id] + 1) << 3;
 
 	/* Load mode configuration to Counter Mode Register */
-	outb(QUAD8_CTR_CMR | mode_cfg, base_offset);
+	iowrite8(QUAD8_CTR_CMR | mode_cfg, base_offset);
 
 	spin_unlock_irqrestore(&priv->lock, irqflags);
 
@@ -669,7 +669,7 @@ static int quad8_count_enable_write(struct counter_device *counter,
 				    struct counter_count *count, u8 enable)
 {
 	struct quad8 *const priv = counter_priv(counter);
-	const int base_offset = priv->base + 2 * count->id;
+	void __iomem *const base_offset = priv->base + 2 * count->id;
 	unsigned long irqflags;
 	unsigned int ior_cfg;
 
@@ -681,7 +681,7 @@ static int quad8_count_enable_write(struct counter_device *counter,
 		  priv->irq_trigger[count->id] << 3;
 
 	/* Load I/O control configuration */
-	outb(QUAD8_CTR_IOR | ior_cfg, base_offset + 1);
+	iowrite8(QUAD8_CTR_IOR | ior_cfg, base_offset + 1);
 
 	spin_unlock_irqrestore(&priv->lock, irqflags);
 
@@ -697,9 +697,9 @@ static int quad8_error_noise_get(struct counter_device *counter,
 				 struct counter_count *count, u32 *noise_error)
 {
 	const struct quad8 *const priv = counter_priv(counter);
-	const int base_offset = priv->base + 2 * count->id + 1;
+	void __iomem *const base_offset = priv->base + 2 * count->id + 1;
 
-	*noise_error = !!(inb(base_offset) & QUAD8_FLAG_E);
+	*noise_error = !!(ioread8(base_offset) & QUAD8_FLAG_E);
 
 	return 0;
 }
@@ -717,17 +717,17 @@ static int quad8_count_preset_read(struct counter_device *counter,
 static void quad8_preset_register_set(struct quad8 *const priv, const int id,
 				      const unsigned int preset)
 {
-	const unsigned int base_offset = priv->base + 2 * id;
+	void __iomem *const base_offset = priv->base + 2 * id;
 	int i;
 
 	priv->preset[id] = preset;
 
 	/* Reset Byte Pointer */
-	outb(QUAD8_CTR_RLD | QUAD8_RLD_RESET_BP, base_offset + 1);
+	iowrite8(QUAD8_CTR_RLD | QUAD8_RLD_RESET_BP, base_offset + 1);
 
 	/* Set Preset Register */
 	for (i = 0; i < 3; i++)
-		outb(preset >> (8 * i), base_offset);
+		iowrite8(preset >> (8 * i), base_offset);
 }
 
 static int quad8_count_preset_write(struct counter_device *counter,
@@ -816,7 +816,7 @@ static int quad8_count_preset_enable_write(struct counter_device *counter,
 					   u8 preset_enable)
 {
 	struct quad8 *const priv = counter_priv(counter);
-	const int base_offset = priv->base + 2 * count->id + 1;
+	void __iomem *const base_offset = priv->base + 2 * count->id + 1;
 	unsigned long irqflags;
 	unsigned int ior_cfg;
 
@@ -831,7 +831,7 @@ static int quad8_count_preset_enable_write(struct counter_device *counter,
 		  priv->irq_trigger[count->id] << 3;
 
 	/* Load I/O control configuration to Input / Output Control Register */
-	outb(QUAD8_CTR_IOR | ior_cfg, base_offset);
+	iowrite8(QUAD8_CTR_IOR | ior_cfg, base_offset);
 
 	spin_unlock_irqrestore(&priv->lock, irqflags);
 
@@ -858,7 +858,7 @@ static int quad8_signal_cable_fault_read(struct counter_device *counter,
 	}
 
 	/* Logic 0 = cable fault */
-	status = inb(priv->base + QUAD8_DIFF_ENCODER_CABLE_STATUS);
+	status = ioread8(priv->base + QUAD8_DIFF_ENCODER_CABLE_STATUS);
 
 	spin_unlock_irqrestore(&priv->lock, irqflags);
 
@@ -899,7 +899,8 @@ static int quad8_signal_cable_fault_enable_write(struct counter_device *counter,
 	/* Enable is active low in Differential Encoder Cable Status register */
 	cable_fault_enable = ~priv->cable_fault_enable;
 
-	outb(cable_fault_enable, priv->base + QUAD8_DIFF_ENCODER_CABLE_STATUS);
+	iowrite8(cable_fault_enable,
+		 priv->base + QUAD8_DIFF_ENCODER_CABLE_STATUS);
 
 	spin_unlock_irqrestore(&priv->lock, irqflags);
 
@@ -923,7 +924,7 @@ static int quad8_signal_fck_prescaler_write(struct counter_device *counter,
 {
 	struct quad8 *const priv = counter_priv(counter);
 	const size_t channel_id = signal->id / 2;
-	const int base_offset = priv->base + 2 * channel_id;
+	void __iomem *const base_offset = priv->base + 2 * channel_id;
 	unsigned long irqflags;
 
 	spin_lock_irqsave(&priv->lock, irqflags);
@@ -931,12 +932,12 @@ static int quad8_signal_fck_prescaler_write(struct counter_device *counter,
 	priv->fck_prescaler[channel_id] = prescaler;
 
 	/* Reset Byte Pointer */
-	outb(QUAD8_CTR_RLD | QUAD8_RLD_RESET_BP, base_offset + 1);
+	iowrite8(QUAD8_CTR_RLD | QUAD8_RLD_RESET_BP, base_offset + 1);
 
 	/* Set filter clock factor */
-	outb(prescaler, base_offset);
-	outb(QUAD8_CTR_RLD | QUAD8_RLD_RESET_BP | QUAD8_RLD_PRESET_PSC,
-	     base_offset + 1);
+	iowrite8(prescaler, base_offset);
+	iowrite8(QUAD8_CTR_RLD | QUAD8_RLD_RESET_BP | QUAD8_RLD_PRESET_PSC,
+		 base_offset + 1);
 
 	spin_unlock_irqrestore(&priv->lock, irqflags);
 
@@ -1084,12 +1085,12 @@ static irqreturn_t quad8_irq_handler(int irq, void *private)
 {
 	struct counter_device *counter = private;
 	struct quad8 *const priv = counter_priv(counter);
-	const unsigned long base = priv->base;
+	void __iomem *const base = priv->base;
 	unsigned long irq_status;
 	unsigned long channel;
 	u8 event;
 
-	irq_status = inb(base + QUAD8_REG_INTERRUPT_STATUS);
+	irq_status = ioread8(base + QUAD8_REG_INTERRUPT_STATUS);
 	if (!irq_status)
 		return IRQ_NONE;
 
@@ -1118,17 +1119,43 @@ static irqreturn_t quad8_irq_handler(int irq, void *private)
 	}
 
 	/* Clear pending interrupts on device */
-	outb(QUAD8_CHAN_OP_ENABLE_INTERRUPT_FUNC, base + QUAD8_REG_CHAN_OP);
+	iowrite8(QUAD8_CHAN_OP_ENABLE_INTERRUPT_FUNC, base + QUAD8_REG_CHAN_OP);
 
 	return IRQ_HANDLED;
 }
 
+static void quad8_init_counter(void __iomem *const base_offset)
+{
+	unsigned long i;
+
+	/* Reset Byte Pointer */
+	iowrite8(QUAD8_CTR_RLD | QUAD8_RLD_RESET_BP, base_offset + 1);
+	/* Reset filter clock factor */
+	iowrite8(0, base_offset);
+	iowrite8(QUAD8_CTR_RLD | QUAD8_RLD_RESET_BP | QUAD8_RLD_PRESET_PSC,
+		 base_offset + 1);
+	/* Reset Byte Pointer */
+	iowrite8(QUAD8_CTR_RLD | QUAD8_RLD_RESET_BP, base_offset + 1);
+	/* Reset Preset Register */
+	for (i = 0; i < 3; i++)
+		iowrite8(0x00, base_offset);
+	/* Reset Borrow, Carry, Compare, and Sign flags */
+	iowrite8(QUAD8_CTR_RLD | QUAD8_RLD_RESET_FLAGS, base_offset + 1);
+	/* Reset Error flag */
+	iowrite8(QUAD8_CTR_RLD | QUAD8_RLD_RESET_E, base_offset + 1);
+	/* Binary encoding; Normal count; non-quadrature mode */
+	iowrite8(QUAD8_CTR_CMR, base_offset + 1);
+	/* Disable A and B inputs; preset on index; FLG1 as Carry */
+	iowrite8(QUAD8_CTR_IOR, base_offset + 1);
+	/* Disable index function; negative index polarity */
+	iowrite8(QUAD8_CTR_IDR, base_offset + 1);
+}
+
 static int quad8_probe(struct device *dev, unsigned int id)
 {
 	struct counter_device *counter;
 	struct quad8 *priv;
-	int i, j;
-	unsigned int base_offset;
+	unsigned long i;
 	int err;
 
 	if (!devm_request_region(dev, base[id], QUAD8_EXTENT, dev_name(dev))) {
@@ -1142,6 +1169,10 @@ static int quad8_probe(struct device *dev, unsigned int id)
 		return -ENOMEM;
 	priv = counter_priv(counter);
 
+	priv->base = devm_ioport_map(dev, base[id], QUAD8_EXTENT);
+	if (!priv->base)
+		return -ENOMEM;
+
 	/* Initialize Counter device and driver data */
 	counter->name = dev_name(dev);
 	counter->parent = dev;
@@ -1150,43 +1181,21 @@ static int quad8_probe(struct device *dev, unsigned int id)
 	counter->num_counts = ARRAY_SIZE(quad8_counts);
 	counter->signals = quad8_signals;
 	counter->num_signals = ARRAY_SIZE(quad8_signals);
-	priv->base = base[id];
 
 	spin_lock_init(&priv->lock);
 
 	/* Reset Index/Interrupt Register */
-	outb(0x00, base[id] + QUAD8_REG_INDEX_INTERRUPT);
+	iowrite8(0x00, priv->base + QUAD8_REG_INDEX_INTERRUPT);
 	/* Reset all counters and disable interrupt function */
-	outb(QUAD8_CHAN_OP_RESET_COUNTERS, base[id] + QUAD8_REG_CHAN_OP);
+	iowrite8(QUAD8_CHAN_OP_RESET_COUNTERS, priv->base + QUAD8_REG_CHAN_OP);
 	/* Set initial configuration for all counters */
-	for (i = 0; i < QUAD8_NUM_COUNTERS; i++) {
-		base_offset = base[id] + 2 * i;
-		/* Reset Byte Pointer */
-		outb(QUAD8_CTR_RLD | QUAD8_RLD_RESET_BP, base_offset + 1);
-		/* Reset filter clock factor */
-		outb(0, base_offset);
-		outb(QUAD8_CTR_RLD | QUAD8_RLD_RESET_BP | QUAD8_RLD_PRESET_PSC,
-		     base_offset + 1);
-		/* Reset Byte Pointer */
-		outb(QUAD8_CTR_RLD | QUAD8_RLD_RESET_BP, base_offset + 1);
-		/* Reset Preset Register */
-		for (j = 0; j < 3; j++)
-			outb(0x00, base_offset);
-		/* Reset Borrow, Carry, Compare, and Sign flags */
-		outb(QUAD8_CTR_RLD | QUAD8_RLD_RESET_FLAGS, base_offset + 1);
-		/* Reset Error flag */
-		outb(QUAD8_CTR_RLD | QUAD8_RLD_RESET_E, base_offset + 1);
-		/* Binary encoding; Normal count; non-quadrature mode */
-		outb(QUAD8_CTR_CMR, base_offset + 1);
-		/* Disable A and B inputs; preset on index; FLG1 as Carry */
-		outb(QUAD8_CTR_IOR, base_offset + 1);
-		/* Disable index function; negative index polarity */
-		outb(QUAD8_CTR_IDR, base_offset + 1);
-	}
+	for (i = 0; i < QUAD8_NUM_COUNTERS; i++)
+		quad8_init_counter(priv->base + 2 * i);
 	/* Disable Differential Encoder Cable Status for all channels */
-	outb(0xFF, base[id] + QUAD8_DIFF_ENCODER_CABLE_STATUS);
+	iowrite8(0xFF, priv->base + QUAD8_DIFF_ENCODER_CABLE_STATUS);
 	/* Enable all counters and enable interrupt function */
-	outb(QUAD8_CHAN_OP_ENABLE_INTERRUPT_FUNC, base[id] + QUAD8_REG_CHAN_OP);
+	iowrite8(QUAD8_CHAN_OP_ENABLE_INTERRUPT_FUNC,
+		 priv->base + QUAD8_REG_CHAN_OP);
 
 	err = devm_request_irq(&counter->dev, irq[id], quad8_irq_handler,
 			       IRQF_SHARED, counter->name, counter);
-- 
2.35.3

[PATCH 2/8] gpio: 104-dio-48e: Utilize iomap interface

[William Breathitt Gray]

This driver doesn't need to access I/O ports directly via inb()/outb()
and friends. This patch abstracts such access by calling ioport_map()
to enable the use of more typical ioread8()/iowrite8() I/O memory
accessor calls.

Suggested-by: David Laight <David.Laight@ACULAB.COM>
Signed-off-by: William Breathitt Gray <william.gray@linaro.org>
---
 drivers/gpio/gpio-104-dio-48e.c | 63 +++++++++++++++++----------------
 1 file changed, 33 insertions(+), 30 deletions(-)

diff --git a/drivers/gpio/gpio-104-dio-48e.c b/drivers/gpio/gpio-104-dio-48e.c
index 6bf41040c41f..f118ad9bcd33 100644
--- a/drivers/gpio/gpio-104-dio-48e.c
+++ b/drivers/gpio/gpio-104-dio-48e.c
@@ -49,7 +49,7 @@ struct dio48e_gpio {
 	unsigned char out_state[6];
 	unsigned char control[2];
 	raw_spinlock_t lock;
-	unsigned int base;
+	void __iomem *base;
 	unsigned char irq_mask;
 };
 
@@ -70,7 +70,7 @@ static int dio48e_gpio_direction_input(struct gpio_chip *chip, unsigned int offs
 	struct dio48e_gpio *const dio48egpio = gpiochip_get_data(chip);
 	const unsigned int io_port = offset / 8;
 	const unsigned int control_port = io_port / 3;
-	const unsigned int control_addr = dio48egpio->base + 3 + control_port * 4;
+	void __iomem *const control_addr = dio48egpio->base + 3 + control_port * 4;
 	unsigned long flags;
 	unsigned int control;
 
@@ -95,9 +95,9 @@ static int dio48e_gpio_direction_input(struct gpio_chip *chip, unsigned int offs
 	}
 
 	control = BIT(7) | dio48egpio->control[control_port];
-	outb(control, control_addr);
+	iowrite8(control, control_addr);
 	control &= ~BIT(7);
-	outb(control, control_addr);
+	iowrite8(control, control_addr);
 
 	raw_spin_unlock_irqrestore(&dio48egpio->lock, flags);
 
@@ -111,7 +111,7 @@ static int dio48e_gpio_direction_output(struct gpio_chip *chip, unsigned int off
 	const unsigned int io_port = offset / 8;
 	const unsigned int control_port = io_port / 3;
 	const unsigned int mask = BIT(offset % 8);
-	const unsigned int control_addr = dio48egpio->base + 3 + control_port * 4;
+	void __iomem *const control_addr = dio48egpio->base + 3 + control_port * 4;
 	const unsigned int out_port = (io_port > 2) ? io_port + 1 : io_port;
 	unsigned long flags;
 	unsigned int control;
@@ -142,12 +142,12 @@ static int dio48e_gpio_direction_output(struct gpio_chip *chip, unsigned int off
 		dio48egpio->out_state[io_port] &= ~mask;
 
 	control = BIT(7) | dio48egpio->control[control_port];
-	outb(control, control_addr);
+	iowrite8(control, control_addr);
 
-	outb(dio48egpio->out_state[io_port], dio48egpio->base + out_port);
+	iowrite8(dio48egpio->out_state[io_port], dio48egpio->base + out_port);
 
 	control &= ~BIT(7);
-	outb(control, control_addr);
+	iowrite8(control, control_addr);
 
 	raw_spin_unlock_irqrestore(&dio48egpio->lock, flags);
 
@@ -171,7 +171,7 @@ static int dio48e_gpio_get(struct gpio_chip *chip, unsigned int offset)
 		return -EINVAL;
 	}
 
-	port_state = inb(dio48egpio->base + in_port);
+	port_state = ioread8(dio48egpio->base + in_port);
 
 	raw_spin_unlock_irqrestore(&dio48egpio->lock, flags);
 
@@ -186,7 +186,7 @@ static int dio48e_gpio_get_multiple(struct gpio_chip *chip, unsigned long *mask,
 	struct dio48e_gpio *const dio48egpio = gpiochip_get_data(chip);
 	unsigned long offset;
 	unsigned long gpio_mask;
-	unsigned int port_addr;
+	void __iomem *port_addr;
 	unsigned long port_state;
 
 	/* clear bits array to a clean slate */
@@ -194,7 +194,7 @@ static int dio48e_gpio_get_multiple(struct gpio_chip *chip, unsigned long *mask,
 
 	for_each_set_clump8(offset, gpio_mask, mask, ARRAY_SIZE(ports) * 8) {
 		port_addr = dio48egpio->base + ports[offset / 8];
-		port_state = inb(port_addr) & gpio_mask;
+		port_state = ioread8(port_addr) & gpio_mask;
 
 		bitmap_set_value8(bits, port_state, offset);
 	}
@@ -217,7 +217,7 @@ static void dio48e_gpio_set(struct gpio_chip *chip, unsigned int offset, int val
 	else
 		dio48egpio->out_state[port] &= ~mask;
 
-	outb(dio48egpio->out_state[port], dio48egpio->base + out_port);
+	iowrite8(dio48egpio->out_state[port], dio48egpio->base + out_port);
 
 	raw_spin_unlock_irqrestore(&dio48egpio->lock, flags);
 }
@@ -229,7 +229,7 @@ static void dio48e_gpio_set_multiple(struct gpio_chip *chip,
 	unsigned long offset;
 	unsigned long gpio_mask;
 	size_t index;
-	unsigned int port_addr;
+	void __iomem *port_addr;
 	unsigned long bitmask;
 	unsigned long flags;
 
@@ -244,7 +244,7 @@ static void dio48e_gpio_set_multiple(struct gpio_chip *chip,
 		/* update output state data and set device gpio register */
 		dio48egpio->out_state[index] &= ~gpio_mask;
 		dio48egpio->out_state[index] |= bitmask;
-		outb(dio48egpio->out_state[index], port_addr);
+		iowrite8(dio48egpio->out_state[index], port_addr);
 
 		raw_spin_unlock_irqrestore(&dio48egpio->lock, flags);
 	}
@@ -274,7 +274,7 @@ static void dio48e_irq_mask(struct irq_data *data)
 
 	if (!dio48egpio->irq_mask)
 		/* disable interrupts */
-		inb(dio48egpio->base + 0xB);
+		ioread8(dio48egpio->base + 0xB);
 
 	raw_spin_unlock_irqrestore(&dio48egpio->lock, flags);
 }
@@ -294,8 +294,8 @@ static void dio48e_irq_unmask(struct irq_data *data)
 
 	if (!dio48egpio->irq_mask) {
 		/* enable interrupts */
-		outb(0x00, dio48egpio->base + 0xF);
-		outb(0x00, dio48egpio->base + 0xB);
+		iowrite8(0x00, dio48egpio->base + 0xF);
+		iowrite8(0x00, dio48egpio->base + 0xB);
 	}
 
 	if (offset == 19)
@@ -341,7 +341,7 @@ static irqreturn_t dio48e_irq_handler(int irq, void *dev_id)
 
 	raw_spin_lock(&dio48egpio->lock);
 
-	outb(0x00, dio48egpio->base + 0xF);
+	iowrite8(0x00, dio48egpio->base + 0xF);
 
 	raw_spin_unlock(&dio48egpio->lock);
 
@@ -373,7 +373,7 @@ static int dio48e_irq_init_hw(struct gpio_chip *gc)
 	struct dio48e_gpio *const dio48egpio = gpiochip_get_data(gc);
 
 	/* Disable IRQ by default */
-	inb(dio48egpio->base + 0xB);
+	ioread8(dio48egpio->base + 0xB);
 
 	return 0;
 }
@@ -395,6 +395,10 @@ static int dio48e_probe(struct device *dev, unsigned int id)
 		return -EBUSY;
 	}
 
+	dio48egpio->base = devm_ioport_map(dev, base[id], DIO48E_EXTENT);
+	if (!dio48egpio->base)
+		return -ENOMEM;
+
 	dio48egpio->chip.label = name;
 	dio48egpio->chip.parent = dev;
 	dio48egpio->chip.owner = THIS_MODULE;
@@ -408,7 +412,6 @@ static int dio48e_probe(struct device *dev, unsigned int id)
 	dio48egpio->chip.get_multiple = dio48e_gpio_get_multiple;
 	dio48egpio->chip.set = dio48e_gpio_set;
 	dio48egpio->chip.set_multiple = dio48e_gpio_set_multiple;
-	dio48egpio->base = base[id];
 
 	girq = &dio48egpio->chip.irq;
 	girq->chip = &dio48e_irqchip;
@@ -423,16 +426,16 @@ static int dio48e_probe(struct device *dev, unsigned int id)
 	raw_spin_lock_init(&dio48egpio->lock);
 
 	/* initialize all GPIO as output */
-	outb(0x80, base[id] + 3);
-	outb(0x00, base[id]);
-	outb(0x00, base[id] + 1);
-	outb(0x00, base[id] + 2);
-	outb(0x00, base[id] + 3);
-	outb(0x80, base[id] + 7);
-	outb(0x00, base[id] + 4);
-	outb(0x00, base[id] + 5);
-	outb(0x00, base[id] + 6);
-	outb(0x00, base[id] + 7);
+	iowrite8(0x80, dio48egpio->base + 3);
+	iowrite8(0x00, dio48egpio->base);
+	iowrite8(0x00, dio48egpio->base + 1);
+	iowrite8(0x00, dio48egpio->base + 2);
+	iowrite8(0x00, dio48egpio->base + 3);
+	iowrite8(0x80, dio48egpio->base + 7);
+	iowrite8(0x00, dio48egpio->base + 4);
+	iowrite8(0x00, dio48egpio->base + 5);
+	iowrite8(0x00, dio48egpio->base + 6);
+	iowrite8(0x00, dio48egpio->base + 7);
 
 	err = devm_gpiochip_add_data(dev, &dio48egpio->chip, dio48egpio);
 	if (err) {
-- 
2.35.3

[PATCH 3/8] gpio: 104-idi-48: Utilize iomap interface

[William Breathitt Gray]

This driver doesn't need to access I/O ports directly via inb()/outb()
and friends. This patch abstracts such access by calling ioport_map()
to enable the use of more typical ioread8()/iowrite8() I/O memory
accessor calls.

Suggested-by: David Laight <David.Laight@ACULAB.COM>
Signed-off-by: William Breathitt Gray <william.gray@linaro.org>
---
 drivers/gpio/gpio-104-idi-48.c | 27 +++++++++++++++------------
 1 file changed, 15 insertions(+), 12 deletions(-)

diff --git a/drivers/gpio/gpio-104-idi-48.c b/drivers/gpio/gpio-104-idi-48.c
index 34be7dd9f5b9..9521ece3ebef 100644
--- a/drivers/gpio/gpio-104-idi-48.c
+++ b/drivers/gpio/gpio-104-idi-48.c
@@ -47,7 +47,7 @@ struct idi_48_gpio {
 	raw_spinlock_t lock;
 	spinlock_t ack_lock;
 	unsigned char irq_mask[6];
-	unsigned base;
+	void __iomem *base;
 	unsigned char cos_enb;
 };
 
@@ -66,15 +66,15 @@ static int idi_48_gpio_get(struct gpio_chip *chip, unsigned offset)
 	struct idi_48_gpio *const idi48gpio = gpiochip_get_data(chip);
 	unsigned i;
 	static const unsigned int register_offset[6] = { 0, 1, 2, 4, 5, 6 };
-	unsigned base_offset;
+	void __iomem *port_addr;
 	unsigned mask;
 
 	for (i = 0; i < 48; i += 8)
 		if (offset < i + 8) {
-			base_offset = register_offset[i / 8];
+			port_addr = idi48gpio->base + register_offset[i / 8];
 			mask = BIT(offset - i);
 
-			return !!(inb(idi48gpio->base + base_offset) & mask);
+			return !!(ioread8(port_addr) & mask);
 		}
 
 	/* The following line should never execute since offset < 48 */
@@ -88,7 +88,7 @@ static int idi_48_gpio_get_multiple(struct gpio_chip *chip, unsigned long *mask,
 	unsigned long offset;
 	unsigned long gpio_mask;
 	static const size_t ports[] = { 0, 1, 2, 4, 5, 6 };
-	unsigned int port_addr;
+	void __iomem *port_addr;
 	unsigned long port_state;
 
 	/* clear bits array to a clean slate */
@@ -96,7 +96,7 @@ static int idi_48_gpio_get_multiple(struct gpio_chip *chip, unsigned long *mask,
 
 	for_each_set_clump8(offset, gpio_mask, mask, ARRAY_SIZE(ports) * 8) {
 		port_addr = idi48gpio->base + ports[offset / 8];
-		port_state = inb(port_addr) & gpio_mask;
+		port_state = ioread8(port_addr) & gpio_mask;
 
 		bitmap_set_value8(bits, port_state, offset);
 	}
@@ -130,7 +130,7 @@ static void idi_48_irq_mask(struct irq_data *data)
 
 				raw_spin_lock_irqsave(&idi48gpio->lock, flags);
 
-				outb(idi48gpio->cos_enb, idi48gpio->base + 7);
+				iowrite8(idi48gpio->cos_enb, idi48gpio->base + 7);
 
 				raw_spin_unlock_irqrestore(&idi48gpio->lock, flags);
 			}
@@ -163,7 +163,7 @@ static void idi_48_irq_unmask(struct irq_data *data)
 
 				raw_spin_lock_irqsave(&idi48gpio->lock, flags);
 
-				outb(idi48gpio->cos_enb, idi48gpio->base + 7);
+				iowrite8(idi48gpio->cos_enb, idi48gpio->base + 7);
 
 				raw_spin_unlock_irqrestore(&idi48gpio->lock, flags);
 			}
@@ -204,7 +204,7 @@ static irqreturn_t idi_48_irq_handler(int irq, void *dev_id)
 
 	raw_spin_lock(&idi48gpio->lock);
 
-	cos_status = inb(idi48gpio->base + 7);
+	cos_status = ioread8(idi48gpio->base + 7);
 
 	raw_spin_unlock(&idi48gpio->lock);
 
@@ -250,8 +250,8 @@ static int idi_48_irq_init_hw(struct gpio_chip *gc)
 	struct idi_48_gpio *const idi48gpio = gpiochip_get_data(gc);
 
 	/* Disable IRQ by default */
-	outb(0, idi48gpio->base + 7);
-	inb(idi48gpio->base + 7);
+	iowrite8(0, idi48gpio->base + 7);
+	ioread8(idi48gpio->base + 7);
 
 	return 0;
 }
@@ -273,6 +273,10 @@ static int idi_48_probe(struct device *dev, unsigned int id)
 		return -EBUSY;
 	}
 
+	idi48gpio->base = devm_ioport_map(dev, base[id], IDI_48_EXTENT);
+	if (!idi48gpio->base)
+		return -ENOMEM;
+
 	idi48gpio->chip.label = name;
 	idi48gpio->chip.parent = dev;
 	idi48gpio->chip.owner = THIS_MODULE;
@@ -283,7 +287,6 @@ static int idi_48_probe(struct device *dev, unsigned int id)
 	idi48gpio->chip.direction_input = idi_48_gpio_direction_input;
 	idi48gpio->chip.get = idi_48_gpio_get;
 	idi48gpio->chip.get_multiple = idi_48_gpio_get_multiple;
-	idi48gpio->base = base[id];
 
 	girq = &idi48gpio->chip.irq;
 	girq->chip = &idi_48_irqchip;
-- 
2.35.3

[PATCH 4/8] gpio: 104-idio-16: Utilize iomap interface

[William Breathitt Gray]

This driver doesn't need to access I/O ports directly via inb()/outb()
and friends. This patch abstracts such access by calling ioport_map()
to enable the use of more typical ioread8()/iowrite8() I/O memory
accessor calls.

Suggested-by: David Laight <David.Laight@ACULAB.COM>
Signed-off-by: William Breathitt Gray <william.gray@linaro.org>
---
 drivers/gpio/gpio-104-idio-16.c | 33 ++++++++++++++++++---------------
 1 file changed, 18 insertions(+), 15 deletions(-)

diff --git a/drivers/gpio/gpio-104-idio-16.c b/drivers/gpio/gpio-104-idio-16.c
index c68ed1a135fa..45f7ad8573e1 100644
--- a/drivers/gpio/gpio-104-idio-16.c
+++ b/drivers/gpio/gpio-104-idio-16.c
@@ -44,7 +44,7 @@ struct idio_16_gpio {
 	struct gpio_chip chip;
 	raw_spinlock_t lock;
 	unsigned long irq_mask;
-	unsigned int base;
+	void __iomem *base;
 	unsigned int out_state;
 };
 
@@ -79,9 +79,9 @@ static int idio_16_gpio_get(struct gpio_chip *chip, unsigned int offset)
 		return -EINVAL;
 
 	if (offset < 24)
-		return !!(inb(idio16gpio->base + 1) & mask);
+		return !!(ioread8(idio16gpio->base + 1) & mask);
 
-	return !!(inb(idio16gpio->base + 5) & (mask>>8));
+	return !!(ioread8(idio16gpio->base + 5) & (mask>>8));
 }
 
 static int idio_16_gpio_get_multiple(struct gpio_chip *chip,
@@ -91,9 +91,9 @@ static int idio_16_gpio_get_multiple(struct gpio_chip *chip,
 
 	*bits = 0;
 	if (*mask & GENMASK(23, 16))
-		*bits |= (unsigned long)inb(idio16gpio->base + 1) << 16;
+		*bits |= (unsigned long)ioread8(idio16gpio->base + 1) << 16;
 	if (*mask & GENMASK(31, 24))
-		*bits |= (unsigned long)inb(idio16gpio->base + 5) << 24;
+		*bits |= (unsigned long)ioread8(idio16gpio->base + 5) << 24;
 
 	return 0;
 }
@@ -116,9 +116,9 @@ static void idio_16_gpio_set(struct gpio_chip *chip, unsigned int offset,
 		idio16gpio->out_state &= ~mask;
 
 	if (offset > 7)
-		outb(idio16gpio->out_state >> 8, idio16gpio->base + 4);
+		iowrite8(idio16gpio->out_state >> 8, idio16gpio->base + 4);
 	else
-		outb(idio16gpio->out_state, idio16gpio->base);
+		iowrite8(idio16gpio->out_state, idio16gpio->base);
 
 	raw_spin_unlock_irqrestore(&idio16gpio->lock, flags);
 }
@@ -135,9 +135,9 @@ static void idio_16_gpio_set_multiple(struct gpio_chip *chip,
 	idio16gpio->out_state |= *mask & *bits;
 
 	if (*mask & 0xFF)
-		outb(idio16gpio->out_state, idio16gpio->base);
+		iowrite8(idio16gpio->out_state, idio16gpio->base);
 	if ((*mask >> 8) & 0xFF)
-		outb(idio16gpio->out_state >> 8, idio16gpio->base + 4);
+		iowrite8(idio16gpio->out_state >> 8, idio16gpio->base + 4);
 
 	raw_spin_unlock_irqrestore(&idio16gpio->lock, flags);
 }
@@ -158,7 +158,7 @@ static void idio_16_irq_mask(struct irq_data *data)
 	if (!idio16gpio->irq_mask) {
 		raw_spin_lock_irqsave(&idio16gpio->lock, flags);
 
-		outb(0, idio16gpio->base + 2);
+		iowrite8(0, idio16gpio->base + 2);
 
 		raw_spin_unlock_irqrestore(&idio16gpio->lock, flags);
 	}
@@ -177,7 +177,7 @@ static void idio_16_irq_unmask(struct irq_data *data)
 	if (!prev_irq_mask) {
 		raw_spin_lock_irqsave(&idio16gpio->lock, flags);
 
-		inb(idio16gpio->base + 2);
+		ioread8(idio16gpio->base + 2);
 
 		raw_spin_unlock_irqrestore(&idio16gpio->lock, flags);
 	}
@@ -212,7 +212,7 @@ static irqreturn_t idio_16_irq_handler(int irq, void *dev_id)
 
 	raw_spin_lock(&idio16gpio->lock);
 
-	outb(0, idio16gpio->base + 1);
+	iowrite8(0, idio16gpio->base + 1);
 
 	raw_spin_unlock(&idio16gpio->lock);
 
@@ -232,8 +232,8 @@ static int idio_16_irq_init_hw(struct gpio_chip *gc)
 	struct idio_16_gpio *const idio16gpio = gpiochip_get_data(gc);
 
 	/* Disable IRQ by default */
-	outb(0, idio16gpio->base + 2);
-	outb(0, idio16gpio->base + 1);
+	iowrite8(0, idio16gpio->base + 2);
+	iowrite8(0, idio16gpio->base + 1);
 
 	return 0;
 }
@@ -255,6 +255,10 @@ static int idio_16_probe(struct device *dev, unsigned int id)
 		return -EBUSY;
 	}
 
+	idio16gpio->base = devm_ioport_map(dev, base[id], IDIO_16_EXTENT);
+	if (!idio16gpio->base)
+		return -ENOMEM;
+
 	idio16gpio->chip.label = name;
 	idio16gpio->chip.parent = dev;
 	idio16gpio->chip.owner = THIS_MODULE;
@@ -268,7 +272,6 @@ static int idio_16_probe(struct device *dev, unsigned int id)
 	idio16gpio->chip.get_multiple = idio_16_gpio_get_multiple;
 	idio16gpio->chip.set = idio_16_gpio_set;
 	idio16gpio->chip.set_multiple = idio_16_gpio_set_multiple;
-	idio16gpio->base = base[id];
 	idio16gpio->out_state = 0xFFFF;
 
 	girq = &idio16gpio->chip.irq;
-- 
2.35.3

[PATCH 5/8] gpio: gpio-mm: Utilize iomap interface

[William Breathitt Gray]

This driver doesn't need to access I/O ports directly via inb()/outb()
and friends. This patch abstracts such access by calling ioport_map()
to enable the use of more typical ioread8()/iowrite8() I/O memory
accessor calls.

Suggested-by: David Laight <David.Laight@ACULAB.COM>
Signed-off-by: William Breathitt Gray <william.gray@linaro.org>
---
 drivers/gpio/gpio-gpio-mm.c | 43 +++++++++++++++++++------------------
 1 file changed, 22 insertions(+), 21 deletions(-)

diff --git a/drivers/gpio/gpio-gpio-mm.c b/drivers/gpio/gpio-gpio-mm.c
index b89b8c5ff1f5..097a06463d01 100644
--- a/drivers/gpio/gpio-gpio-mm.c
+++ b/drivers/gpio/gpio-gpio-mm.c
@@ -42,7 +42,7 @@ struct gpiomm_gpio {
 	unsigned char out_state[6];
 	unsigned char control[2];
 	spinlock_t lock;
-	unsigned int base;
+	void __iomem *base;
 };
 
 static int gpiomm_gpio_get_direction(struct gpio_chip *chip,
@@ -64,7 +64,6 @@ static int gpiomm_gpio_direction_input(struct gpio_chip *chip,
 	struct gpiomm_gpio *const gpiommgpio = gpiochip_get_data(chip);
 	const unsigned int io_port = offset / 8;
 	const unsigned int control_port = io_port / 3;
-	const unsigned int control_addr = gpiommgpio->base + 3 + control_port*4;
 	unsigned long flags;
 	unsigned int control;
 
@@ -89,7 +88,7 @@ static int gpiomm_gpio_direction_input(struct gpio_chip *chip,
 	}
 
 	control = BIT(7) | gpiommgpio->control[control_port];
-	outb(control, control_addr);
+	iowrite8(control, gpiommgpio->base + 3 + control_port*4);
 
 	spin_unlock_irqrestore(&gpiommgpio->lock, flags);
 
@@ -103,7 +102,6 @@ static int gpiomm_gpio_direction_output(struct gpio_chip *chip,
 	const unsigned int io_port = offset / 8;
 	const unsigned int control_port = io_port / 3;
 	const unsigned int mask = BIT(offset % 8);
-	const unsigned int control_addr = gpiommgpio->base + 3 + control_port*4;
 	const unsigned int out_port = (io_port > 2) ? io_port + 1 : io_port;
 	unsigned long flags;
 	unsigned int control;
@@ -134,9 +132,9 @@ static int gpiomm_gpio_direction_output(struct gpio_chip *chip,
 		gpiommgpio->out_state[io_port] &= ~mask;
 
 	control = BIT(7) | gpiommgpio->control[control_port];
-	outb(control, control_addr);
+	iowrite8(control, gpiommgpio->base + 3 + control_port*4);
 
-	outb(gpiommgpio->out_state[io_port], gpiommgpio->base + out_port);
+	iowrite8(gpiommgpio->out_state[io_port], gpiommgpio->base + out_port);
 
 	spin_unlock_irqrestore(&gpiommgpio->lock, flags);
 
@@ -160,7 +158,7 @@ static int gpiomm_gpio_get(struct gpio_chip *chip, unsigned int offset)
 		return -EINVAL;
 	}
 
-	port_state = inb(gpiommgpio->base + in_port);
+	port_state = ioread8(gpiommgpio->base + in_port);
 
 	spin_unlock_irqrestore(&gpiommgpio->lock, flags);
 
@@ -175,7 +173,7 @@ static int gpiomm_gpio_get_multiple(struct gpio_chip *chip, unsigned long *mask,
 	struct gpiomm_gpio *const gpiommgpio = gpiochip_get_data(chip);
 	unsigned long offset;
 	unsigned long gpio_mask;
-	unsigned int port_addr;
+	void __iomem *port_addr;
 	unsigned long port_state;
 
 	/* clear bits array to a clean slate */
@@ -183,7 +181,7 @@ static int gpiomm_gpio_get_multiple(struct gpio_chip *chip, unsigned long *mask,
 
 	for_each_set_clump8(offset, gpio_mask, mask, ARRAY_SIZE(ports) * 8) {
 		port_addr = gpiommgpio->base + ports[offset / 8];
-		port_state = inb(port_addr) & gpio_mask;
+		port_state = ioread8(port_addr) & gpio_mask;
 
 		bitmap_set_value8(bits, port_state, offset);
 	}
@@ -207,7 +205,7 @@ static void gpiomm_gpio_set(struct gpio_chip *chip, unsigned int offset,
 	else
 		gpiommgpio->out_state[port] &= ~mask;
 
-	outb(gpiommgpio->out_state[port], gpiommgpio->base + out_port);
+	iowrite8(gpiommgpio->out_state[port], gpiommgpio->base + out_port);
 
 	spin_unlock_irqrestore(&gpiommgpio->lock, flags);
 }
@@ -219,7 +217,7 @@ static void gpiomm_gpio_set_multiple(struct gpio_chip *chip,
 	unsigned long offset;
 	unsigned long gpio_mask;
 	size_t index;
-	unsigned int port_addr;
+	void __iomem *port_addr;
 	unsigned long bitmask;
 	unsigned long flags;
 
@@ -234,7 +232,7 @@ static void gpiomm_gpio_set_multiple(struct gpio_chip *chip,
 		/* update output state data and set device gpio register */
 		gpiommgpio->out_state[index] &= ~gpio_mask;
 		gpiommgpio->out_state[index] |= bitmask;
-		outb(gpiommgpio->out_state[index], port_addr);
+		iowrite8(gpiommgpio->out_state[index], port_addr);
 
 		spin_unlock_irqrestore(&gpiommgpio->lock, flags);
 	}
@@ -268,6 +266,10 @@ static int gpiomm_probe(struct device *dev, unsigned int id)
 		return -EBUSY;
 	}
 
+	gpiommgpio->base = devm_ioport_map(dev, base[id], GPIOMM_EXTENT);
+	if (!gpiommgpio->base)
+		return -ENOMEM;
+
 	gpiommgpio->chip.label = name;
 	gpiommgpio->chip.parent = dev;
 	gpiommgpio->chip.owner = THIS_MODULE;
@@ -281,7 +283,6 @@ static int gpiomm_probe(struct device *dev, unsigned int id)
 	gpiommgpio->chip.get_multiple = gpiomm_gpio_get_multiple;
 	gpiommgpio->chip.set = gpiomm_gpio_set;
 	gpiommgpio->chip.set_multiple = gpiomm_gpio_set_multiple;
-	gpiommgpio->base = base[id];
 
 	spin_lock_init(&gpiommgpio->lock);
 
@@ -292,14 +293,14 @@ static int gpiomm_probe(struct device *dev, unsigned int id)
 	}
 
 	/* initialize all GPIO as output */
-	outb(0x80, base[id] + 3);
-	outb(0x00, base[id]);
-	outb(0x00, base[id] + 1);
-	outb(0x00, base[id] + 2);
-	outb(0x80, base[id] + 7);
-	outb(0x00, base[id] + 4);
-	outb(0x00, base[id] + 5);
-	outb(0x00, base[id] + 6);
+	iowrite8(0x80, gpiommgpio->base + 3);
+	iowrite8(0x00, gpiommgpio->base);
+	iowrite8(0x00, gpiommgpio->base + 1);
+	iowrite8(0x00, gpiommgpio->base + 2);
+	iowrite8(0x80, gpiommgpio->base + 7);
+	iowrite8(0x00, gpiommgpio->base + 4);
+	iowrite8(0x00, gpiommgpio->base + 5);
+	iowrite8(0x00, gpiommgpio->base + 6);
 
 	return 0;
 }
-- 
2.35.3

[PATCH 6/8] gpio: ws16c48: Utilize iomap interface

[William Breathitt Gray]

This driver doesn't need to access I/O ports directly via inb()/outb()
and friends. This patch abstracts such access by calling ioport_map()
to enable the use of more typical ioread8()/iowrite8() I/O memory
accessor calls.

Suggested-by: David Laight <David.Laight@ACULAB.COM>
Signed-off-by: William Breathitt Gray <william.gray@linaro.org>
---
 drivers/gpio/gpio-ws16c48.c | 65 +++++++++++++++++++------------------
 1 file changed, 34 insertions(+), 31 deletions(-)

diff --git a/drivers/gpio/gpio-ws16c48.c b/drivers/gpio/gpio-ws16c48.c
index bb02a82e22f4..5078631d8014 100644
--- a/drivers/gpio/gpio-ws16c48.c
+++ b/drivers/gpio/gpio-ws16c48.c
@@ -47,7 +47,7 @@ struct ws16c48_gpio {
 	raw_spinlock_t lock;
 	unsigned long irq_mask;
 	unsigned long flow_mask;
-	unsigned base;
+	void __iomem *base;
 };
 
 static int ws16c48_gpio_get_direction(struct gpio_chip *chip, unsigned offset)
@@ -73,7 +73,7 @@ static int ws16c48_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
 
 	ws16c48gpio->io_state[port] |= mask;
 	ws16c48gpio->out_state[port] &= ~mask;
-	outb(ws16c48gpio->out_state[port], ws16c48gpio->base + port);
+	iowrite8(ws16c48gpio->out_state[port], ws16c48gpio->base + port);
 
 	raw_spin_unlock_irqrestore(&ws16c48gpio->lock, flags);
 
@@ -95,7 +95,7 @@ static int ws16c48_gpio_direction_output(struct gpio_chip *chip,
 		ws16c48gpio->out_state[port] |= mask;
 	else
 		ws16c48gpio->out_state[port] &= ~mask;
-	outb(ws16c48gpio->out_state[port], ws16c48gpio->base + port);
+	iowrite8(ws16c48gpio->out_state[port], ws16c48gpio->base + port);
 
 	raw_spin_unlock_irqrestore(&ws16c48gpio->lock, flags);
 
@@ -118,7 +118,7 @@ static int ws16c48_gpio_get(struct gpio_chip *chip, unsigned offset)
 		return -EINVAL;
 	}
 
-	port_state = inb(ws16c48gpio->base + port);
+	port_state = ioread8(ws16c48gpio->base + port);
 
 	raw_spin_unlock_irqrestore(&ws16c48gpio->lock, flags);
 
@@ -131,7 +131,7 @@ static int ws16c48_gpio_get_multiple(struct gpio_chip *chip,
 	struct ws16c48_gpio *const ws16c48gpio = gpiochip_get_data(chip);
 	unsigned long offset;
 	unsigned long gpio_mask;
-	unsigned int port_addr;
+	void __iomem *port_addr;
 	unsigned long port_state;
 
 	/* clear bits array to a clean slate */
@@ -139,7 +139,7 @@ static int ws16c48_gpio_get_multiple(struct gpio_chip *chip,
 
 	for_each_set_clump8(offset, gpio_mask, mask, chip->ngpio) {
 		port_addr = ws16c48gpio->base + offset / 8;
-		port_state = inb(port_addr) & gpio_mask;
+		port_state = ioread8(port_addr) & gpio_mask;
 
 		bitmap_set_value8(bits, port_state, offset);
 	}
@@ -166,7 +166,7 @@ static void ws16c48_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
 		ws16c48gpio->out_state[port] |= mask;
 	else
 		ws16c48gpio->out_state[port] &= ~mask;
-	outb(ws16c48gpio->out_state[port], ws16c48gpio->base + port);
+	iowrite8(ws16c48gpio->out_state[port], ws16c48gpio->base + port);
 
 	raw_spin_unlock_irqrestore(&ws16c48gpio->lock, flags);
 }
@@ -178,7 +178,7 @@ static void ws16c48_gpio_set_multiple(struct gpio_chip *chip,
 	unsigned long offset;
 	unsigned long gpio_mask;
 	size_t index;
-	unsigned int port_addr;
+	void __iomem *port_addr;
 	unsigned long bitmask;
 	unsigned long flags;
 
@@ -195,7 +195,7 @@ static void ws16c48_gpio_set_multiple(struct gpio_chip *chip,
 		/* update output state data and set device gpio register */
 		ws16c48gpio->out_state[index] &= ~gpio_mask;
 		ws16c48gpio->out_state[index] |= bitmask;
-		outb(ws16c48gpio->out_state[index], port_addr);
+		iowrite8(ws16c48gpio->out_state[index], port_addr);
 
 		raw_spin_unlock_irqrestore(&ws16c48gpio->lock, flags);
 	}
@@ -219,10 +219,10 @@ static void ws16c48_irq_ack(struct irq_data *data)
 
 	port_state = ws16c48gpio->irq_mask >> (8*port);
 
-	outb(0x80, ws16c48gpio->base + 7);
-	outb(port_state & ~mask, ws16c48gpio->base + 8 + port);
-	outb(port_state | mask, ws16c48gpio->base + 8 + port);
-	outb(0xC0, ws16c48gpio->base + 7);
+	iowrite8(0x80, ws16c48gpio->base + 7);
+	iowrite8(port_state & ~mask, ws16c48gpio->base + 8 + port);
+	iowrite8(port_state | mask, ws16c48gpio->base + 8 + port);
+	iowrite8(0xC0, ws16c48gpio->base + 7);
 
 	raw_spin_unlock_irqrestore(&ws16c48gpio->lock, flags);
 }
@@ -244,9 +244,9 @@ static void ws16c48_irq_mask(struct irq_data *data)
 
 	ws16c48gpio->irq_mask &= ~mask;
 
-	outb(0x80, ws16c48gpio->base + 7);
-	outb(ws16c48gpio->irq_mask >> (8*port), ws16c48gpio->base + 8 + port);
-	outb(0xC0, ws16c48gpio->base + 7);
+	iowrite8(0x80, ws16c48gpio->base + 7);
+	iowrite8(ws16c48gpio->irq_mask >> (8*port), ws16c48gpio->base + 8 + port);
+	iowrite8(0xC0, ws16c48gpio->base + 7);
 
 	raw_spin_unlock_irqrestore(&ws16c48gpio->lock, flags);
 }
@@ -268,9 +268,9 @@ static void ws16c48_irq_unmask(struct irq_data *data)
 
 	ws16c48gpio->irq_mask |= mask;
 
-	outb(0x80, ws16c48gpio->base + 7);
-	outb(ws16c48gpio->irq_mask >> (8*port), ws16c48gpio->base + 8 + port);
-	outb(0xC0, ws16c48gpio->base + 7);
+	iowrite8(0x80, ws16c48gpio->base + 7);
+	iowrite8(ws16c48gpio->irq_mask >> (8*port), ws16c48gpio->base + 8 + port);
+	iowrite8(0xC0, ws16c48gpio->base + 7);
 
 	raw_spin_unlock_irqrestore(&ws16c48gpio->lock, flags);
 }
@@ -304,9 +304,9 @@ static int ws16c48_irq_set_type(struct irq_data *data, unsigned flow_type)
 		return -EINVAL;
 	}
 
-	outb(0x40, ws16c48gpio->base + 7);
-	outb(ws16c48gpio->flow_mask >> (8*port), ws16c48gpio->base + 8 + port);
-	outb(0xC0, ws16c48gpio->base + 7);
+	iowrite8(0x40, ws16c48gpio->base + 7);
+	iowrite8(ws16c48gpio->flow_mask >> (8*port), ws16c48gpio->base + 8 + port);
+	iowrite8(0xC0, ws16c48gpio->base + 7);
 
 	raw_spin_unlock_irqrestore(&ws16c48gpio->lock, flags);
 
@@ -330,20 +330,20 @@ static irqreturn_t ws16c48_irq_handler(int irq, void *dev_id)
 	unsigned long int_id;
 	unsigned long gpio;
 
-	int_pending = inb(ws16c48gpio->base + 6) & 0x7;
+	int_pending = ioread8(ws16c48gpio->base + 6) & 0x7;
 	if (!int_pending)
 		return IRQ_NONE;
 
 	/* loop until all pending interrupts are handled */
 	do {
 		for_each_set_bit(port, &int_pending, 3) {
-			int_id = inb(ws16c48gpio->base + 8 + port);
+			int_id = ioread8(ws16c48gpio->base + 8 + port);
 			for_each_set_bit(gpio, &int_id, 8)
 				generic_handle_domain_irq(chip->irq.domain,
 							  gpio + 8*port);
 		}
 
-		int_pending = inb(ws16c48gpio->base + 6) & 0x7;
+		int_pending = ioread8(ws16c48gpio->base + 6) & 0x7;
 	} while (int_pending);
 
 	return IRQ_HANDLED;
@@ -370,11 +370,11 @@ static int ws16c48_irq_init_hw(struct gpio_chip *gc)
 	struct ws16c48_gpio *const ws16c48gpio = gpiochip_get_data(gc);
 
 	/* Disable IRQ by default */
-	outb(0x80, ws16c48gpio->base + 7);
-	outb(0, ws16c48gpio->base + 8);
-	outb(0, ws16c48gpio->base + 9);
-	outb(0, ws16c48gpio->base + 10);
-	outb(0xC0, ws16c48gpio->base + 7);
+	iowrite8(0x80, ws16c48gpio->base + 7);
+	iowrite8(0, ws16c48gpio->base + 8);
+	iowrite8(0, ws16c48gpio->base + 9);
+	iowrite8(0, ws16c48gpio->base + 10);
+	iowrite8(0xC0, ws16c48gpio->base + 7);
 
 	return 0;
 }
@@ -396,6 +396,10 @@ static int ws16c48_probe(struct device *dev, unsigned int id)
 		return -EBUSY;
 	}
 
+	ws16c48gpio->base = devm_ioport_map(dev, base[id], WS16C48_EXTENT);
+	if (!ws16c48gpio->base)
+		return -ENOMEM;
+
 	ws16c48gpio->chip.label = name;
 	ws16c48gpio->chip.parent = dev;
 	ws16c48gpio->chip.owner = THIS_MODULE;
@@ -409,7 +413,6 @@ static int ws16c48_probe(struct device *dev, unsigned int id)
 	ws16c48gpio->chip.get_multiple = ws16c48_gpio_get_multiple;
 	ws16c48gpio->chip.set = ws16c48_gpio_set;
 	ws16c48gpio->chip.set_multiple = ws16c48_gpio_set_multiple;
-	ws16c48gpio->base = base[id];
 
 	girq = &ws16c48gpio->chip.irq;
 	girq->chip = &ws16c48_irqchip;
-- 
2.35.3

[PATCH 7/8] iio: adc: stx104: Utilize iomap interface

[William Breathitt Gray]

This driver doesn't need to access I/O ports directly via inb()/outb()
and friends. This patch abstracts such access by calling ioport_map()
to enable the use of more typical ioread8()/iowrite8() I/O memory
accessor calls.

Suggested-by: David Laight <David.Laight@ACULAB.COM>
Signed-off-by: William Breathitt Gray <william.gray@linaro.org>
---
 drivers/iio/adc/stx104.c | 56 +++++++++++++++++++++-------------------
 1 file changed, 29 insertions(+), 27 deletions(-)

diff --git a/drivers/iio/adc/stx104.c b/drivers/iio/adc/stx104.c
index 55bd2dc514e9..7552351bfed9 100644
--- a/drivers/iio/adc/stx104.c
+++ b/drivers/iio/adc/stx104.c
@@ -51,7 +51,7 @@ MODULE_PARM_DESC(base, "Apex Embedded Systems STX104 base addresses");
  */
 struct stx104_iio {
 	unsigned int chan_out_states[STX104_NUM_OUT_CHAN];
-	unsigned int base;
+	void __iomem *base;
 };
 
 /**
@@ -64,7 +64,7 @@ struct stx104_iio {
 struct stx104_gpio {
 	struct gpio_chip chip;
 	spinlock_t lock;
-	unsigned int base;
+	void __iomem *base;
 	unsigned int out_state;
 };
 
@@ -79,7 +79,7 @@ static int stx104_read_raw(struct iio_dev *indio_dev,
 	switch (mask) {
 	case IIO_CHAN_INFO_HARDWAREGAIN:
 		/* get gain configuration */
-		adc_config = inb(priv->base + 11);
+		adc_config = ioread8(priv->base + 11);
 		gain = adc_config & 0x3;
 
 		*val = 1 << gain;
@@ -91,24 +91,24 @@ static int stx104_read_raw(struct iio_dev *indio_dev,
 		}
 
 		/* select ADC channel */
-		outb(chan->channel | (chan->channel << 4), priv->base + 2);
+		iowrite8(chan->channel | (chan->channel << 4), priv->base + 2);
 
 		/* trigger ADC sample capture and wait for completion */
-		outb(0, priv->base);
-		while (inb(priv->base + 8) & BIT(7));
+		iowrite8(0, priv->base);
+		while (ioread8(priv->base + 8) & BIT(7));
 
-		*val = inw(priv->base);
+		*val = ioread16(priv->base);
 		return IIO_VAL_INT;
 	case IIO_CHAN_INFO_OFFSET:
 		/* get ADC bipolar/unipolar configuration */
-		adc_config = inb(priv->base + 11);
+		adc_config = ioread8(priv->base + 11);
 		adbu = !(adc_config & BIT(2));
 
 		*val = -32768 * adbu;
 		return IIO_VAL_INT;
 	case IIO_CHAN_INFO_SCALE:
 		/* get ADC bipolar/unipolar and gain configuration */
-		adc_config = inb(priv->base + 11);
+		adc_config = ioread8(priv->base + 11);
 		adbu = !(adc_config & BIT(2));
 		gain = adc_config & 0x3;
 
@@ -130,16 +130,16 @@ static int stx104_write_raw(struct iio_dev *indio_dev,
 		/* Only four gain states (x1, x2, x4, x8) */
 		switch (val) {
 		case 1:
-			outb(0, priv->base + 11);
+			iowrite8(0, priv->base + 11);
 			break;
 		case 2:
-			outb(1, priv->base + 11);
+			iowrite8(1, priv->base + 11);
 			break;
 		case 4:
-			outb(2, priv->base + 11);
+			iowrite8(2, priv->base + 11);
 			break;
 		case 8:
-			outb(3, priv->base + 11);
+			iowrite8(3, priv->base + 11);
 			break;
 		default:
 			return -EINVAL;
@@ -153,7 +153,7 @@ static int stx104_write_raw(struct iio_dev *indio_dev,
 				return -EINVAL;
 
 			priv->chan_out_states[chan->channel] = val;
-			outw(val, priv->base + 4 + 2 * chan->channel);
+			iowrite16(val, priv->base + 4 + 2 * chan->channel);
 
 			return 0;
 		}
@@ -222,7 +222,7 @@ static int stx104_gpio_get(struct gpio_chip *chip, unsigned int offset)
 	if (offset >= 4)
 		return -EINVAL;
 
-	return !!(inb(stx104gpio->base) & BIT(offset));
+	return !!(ioread8(stx104gpio->base) & BIT(offset));
 }
 
 static int stx104_gpio_get_multiple(struct gpio_chip *chip, unsigned long *mask,
@@ -230,7 +230,7 @@ static int stx104_gpio_get_multiple(struct gpio_chip *chip, unsigned long *mask,
 {
 	struct stx104_gpio *const stx104gpio = gpiochip_get_data(chip);
 
-	*bits = inb(stx104gpio->base);
+	*bits = ioread8(stx104gpio->base);
 
 	return 0;
 }
@@ -252,7 +252,7 @@ static void stx104_gpio_set(struct gpio_chip *chip, unsigned int offset,
 	else
 		stx104gpio->out_state &= ~mask;
 
-	outb(stx104gpio->out_state, stx104gpio->base);
+	iowrite8(stx104gpio->out_state, stx104gpio->base);
 
 	spin_unlock_irqrestore(&stx104gpio->lock, flags);
 }
@@ -279,7 +279,7 @@ static void stx104_gpio_set_multiple(struct gpio_chip *chip,
 
 	stx104gpio->out_state &= ~*mask;
 	stx104gpio->out_state |= *mask & *bits;
-	outb(stx104gpio->out_state, stx104gpio->base);
+	iowrite8(stx104gpio->out_state, stx104gpio->base);
 
 	spin_unlock_irqrestore(&stx104gpio->lock, flags);
 }
@@ -306,11 +306,16 @@ static int stx104_probe(struct device *dev, unsigned int id)
 		return -EBUSY;
 	}
 
+	priv = iio_priv(indio_dev);
+	priv->base = devm_ioport_map(dev, base[id], STX104_EXTENT);
+	if (!priv->base)
+		return -ENOMEM;
+
 	indio_dev->info = &stx104_info;
 	indio_dev->modes = INDIO_DIRECT_MODE;
 
 	/* determine if differential inputs */
-	if (inb(base[id] + 8) & BIT(5)) {
+	if (ioread8(priv->base + 8) & BIT(5)) {
 		indio_dev->num_channels = ARRAY_SIZE(stx104_channels_diff);
 		indio_dev->channels = stx104_channels_diff;
 	} else {
@@ -320,18 +325,15 @@ static int stx104_probe(struct device *dev, unsigned int id)
 
 	indio_dev->name = dev_name(dev);
 
-	priv = iio_priv(indio_dev);
-	priv->base = base[id];
-
 	/* configure device for software trigger operation */
-	outb(0, base[id] + 9);
+	iowrite8(0, priv->base + 9);
 
 	/* initialize gain setting to x1 */
-	outb(0, base[id] + 11);
+	iowrite8(0, priv->base + 11);
 
 	/* initialize DAC output to 0V */
-	outw(0, base[id] + 4);
-	outw(0, base[id] + 6);
+	iowrite16(0, priv->base + 4);
+	iowrite16(0, priv->base + 6);
 
 	stx104gpio->chip.label = dev_name(dev);
 	stx104gpio->chip.parent = dev;
@@ -346,7 +348,7 @@ static int stx104_probe(struct device *dev, unsigned int id)
 	stx104gpio->chip.get_multiple = stx104_gpio_get_multiple;
 	stx104gpio->chip.set = stx104_gpio_set;
 	stx104gpio->chip.set_multiple = stx104_gpio_set_multiple;
-	stx104gpio->base = base[id] + 3;
+	stx104gpio->base = priv->base + 3;
 	stx104gpio->out_state = 0x0;
 
 	spin_lock_init(&stx104gpio->lock);
-- 
2.35.3

[PATCH 8/8] iio: dac: cio-dac: Utilize iomap interface

[William Breathitt Gray]

This driver doesn't need to access I/O ports directly via inb()/outb()
and friends. This patch abstracts such access by calling ioport_map()
to enable the use of more typical ioread8()/iowrite8() I/O memory
accessor calls.

Suggested-by: David Laight <David.Laight@ACULAB.COM>
Signed-off-by: William Breathitt Gray <william.gray@linaro.org>
---
 drivers/iio/dac/cio-dac.c | 14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

diff --git a/drivers/iio/dac/cio-dac.c b/drivers/iio/dac/cio-dac.c
index 95813569f394..8080984dcb03 100644
--- a/drivers/iio/dac/cio-dac.c
+++ b/drivers/iio/dac/cio-dac.c
@@ -41,7 +41,7 @@ MODULE_PARM_DESC(base, "Measurement Computing CIO-DAC base addresses");
  */
 struct cio_dac_iio {
 	int chan_out_states[CIO_DAC_NUM_CHAN];
-	unsigned int base;
+	void __iomem *base;
 };
 
 static int cio_dac_read_raw(struct iio_dev *indio_dev,
@@ -71,7 +71,7 @@ static int cio_dac_write_raw(struct iio_dev *indio_dev,
 		return -EINVAL;
 
 	priv->chan_out_states[chan->channel] = val;
-	outw(val, priv->base + chan_addr_offset);
+	iowrite16(val, priv->base + chan_addr_offset);
 
 	return 0;
 }
@@ -105,18 +105,20 @@ static int cio_dac_probe(struct device *dev, unsigned int id)
 		return -EBUSY;
 	}
 
+	priv = iio_priv(indio_dev);
+	priv->base = devm_ioport_map(dev, base[id], CIO_DAC_EXTENT);
+	if (!priv->base)
+		return -ENOMEM;
+
 	indio_dev->info = &cio_dac_info;
 	indio_dev->modes = INDIO_DIRECT_MODE;
 	indio_dev->channels = cio_dac_channels;
 	indio_dev->num_channels = CIO_DAC_NUM_CHAN;
 	indio_dev->name = dev_name(dev);
 
-	priv = iio_priv(indio_dev);
-	priv->base = base[id];
-
 	/* initialize DAC outputs to 0V */
 	for (i = 0; i < 32; i += 2)
-		outw(0, base[id] + i);
+		iowrite16(0, priv->base + i);
 
 	return devm_iio_device_register(dev, indio_dev);
 }
-- 
2.35.3

Re: [PATCH 0/8] Utilize iomap interface for PC104 and friends

[Linus Walleij]

On Tue, May 10, 2022 at 7:31 PM William Breathitt Gray
<william.gray@linaro.org> wrote:

> PC104 cards and similar devices do not need to access I/O ports directly
> via inb()/outb() and can instead use the more typical I/O memory
> ioread8()/iowrite8() accessor calls by first calling ioport_map(). This
> patchset converts the relevant PC104/ISA card drivers to do such. With
> these drivers now utilizing I/O memory accessor calls, work can be done
> to consolidate some similar devices (e.g. 104-idio-16, pci-idio-16,
> etc.) into a unified driver in a future patchset.
>
> This patchset spawned from a suggestion made in another thread titled
> "gpio: add HAS_IOPORT dependencies":
> https://lore.kernel.org/all/c3a3cdd99d4645e2bbbe082808cbb2a5@AcuMS.aculab.com/

The series:
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>

Yours,
Linus Walleij

Re: [PATCH 0/8] Utilize iomap interface for PC104 and friends

[Bartosz Golaszewski]

On Tue, May 10, 2022 at 7:31 PM William Breathitt Gray
<william.gray@linaro.org> wrote:
>
> PC104 cards and similar devices do not need to access I/O ports directly
> via inb()/outb() and can instead use the more typical I/O memory
> ioread8()/iowrite8() accessor calls by first calling ioport_map(). This
> patchset converts the relevant PC104/ISA card drivers to do such. With
> these drivers now utilizing I/O memory accessor calls, work can be done
> to consolidate some similar devices (e.g. 104-idio-16, pci-idio-16,
> etc.) into a unified driver in a future patchset.
>
> This patchset spawned from a suggestion made in another thread titled
> "gpio: add HAS_IOPORT dependencies":
> https://lore.kernel.org/all/c3a3cdd99d4645e2bbbe082808cbb2a5@AcuMS.aculab.com/
>
> William Breathitt Gray (8):
>   counter: 104-quad-8: Utilize iomap interface
>   gpio: 104-dio-48e: Utilize iomap interface
>   gpio: 104-idi-48: Utilize iomap interface
>   gpio: 104-idio-16: Utilize iomap interface
>   gpio: gpio-mm: Utilize iomap interface
>   gpio: ws16c48: Utilize iomap interface
>   iio: adc: stx104: Utilize iomap interface
>   iio: dac: cio-dac: Utilize iomap interface
>
>  drivers/counter/104-quad-8.c    | 169 +++++++++++++++++---------------
>  drivers/gpio/gpio-104-dio-48e.c |  63 ++++++------
>  drivers/gpio/gpio-104-idi-48.c  |  27 ++---
>  drivers/gpio/gpio-104-idio-16.c |  33 ++++---
>  drivers/gpio/gpio-gpio-mm.c     |  43 ++++----
>  drivers/gpio/gpio-ws16c48.c     |  65 ++++++------
>  drivers/iio/adc/stx104.c        |  56 ++++++-----
>  drivers/iio/dac/cio-dac.c       |  14 +--
>  8 files changed, 248 insertions(+), 222 deletions(-)
>
>
> base-commit: ce522ba9ef7e2d9fb22a39eb3371c0c64e2a433e
> --
> 2.35.3
>

I don't see any dependencies so applied the GPIO part.

Bart

Re: [PATCH 0/8] Utilize iomap interface for PC104 and friends

[Jonathan Cameron]

On Sat, 14 May 2022 14:57:49 +0200
Bartosz Golaszewski <brgl@bgdev.pl> wrote:

> On Tue, May 10, 2022 at 7:31 PM William Breathitt Gray
> <william.gray@linaro.org> wrote:
> >
> > PC104 cards and similar devices do not need to access I/O ports directly
> > via inb()/outb() and can instead use the more typical I/O memory
> > ioread8()/iowrite8() accessor calls by first calling ioport_map(). This
> > patchset converts the relevant PC104/ISA card drivers to do such. With
> > these drivers now utilizing I/O memory accessor calls, work can be done
> > to consolidate some similar devices (e.g. 104-idio-16, pci-idio-16,
> > etc.) into a unified driver in a future patchset.
> >
> > This patchset spawned from a suggestion made in another thread titled
> > "gpio: add HAS_IOPORT dependencies":
> > https://lore.kernel.org/all/c3a3cdd99d4645e2bbbe082808cbb2a5@AcuMS.aculab.com/
> >
> > William Breathitt Gray (8):
> >   counter: 104-quad-8: Utilize iomap interface
> >   gpio: 104-dio-48e: Utilize iomap interface
> >   gpio: 104-idi-48: Utilize iomap interface
> >   gpio: 104-idio-16: Utilize iomap interface
> >   gpio: gpio-mm: Utilize iomap interface
> >   gpio: ws16c48: Utilize iomap interface
> >   iio: adc: stx104: Utilize iomap interface
> >   iio: dac: cio-dac: Utilize iomap interface
> >
> >  drivers/counter/104-quad-8.c    | 169 +++++++++++++++++---------------
> >  drivers/gpio/gpio-104-dio-48e.c |  63 ++++++------
> >  drivers/gpio/gpio-104-idi-48.c  |  27 ++---
> >  drivers/gpio/gpio-104-idio-16.c |  33 ++++---
> >  drivers/gpio/gpio-gpio-mm.c     |  43 ++++----
> >  drivers/gpio/gpio-ws16c48.c     |  65 ++++++------
> >  drivers/iio/adc/stx104.c        |  56 ++++++-----
> >  drivers/iio/dac/cio-dac.c       |  14 +--
> >  8 files changed, 248 insertions(+), 222 deletions(-)
> >
> >
> > base-commit: ce522ba9ef7e2d9fb22a39eb3371c0c64e2a433e
> > --
> > 2.35.3
> >  
> 
> I don't see any dependencies so applied the GPIO part.
Likewise, I've applied the IIO ones. Initially pushed out as testing
to see if 0-day finds any issues. Given timing, we may well be looking
at next merge window now though.

Thanks,

Jonathan

> 
> Bart

Re: [PATCH 0/8] Utilize iomap interface for PC104 and friends

[William Breathitt Gray]

[-- Attachment #1: Type: text/plain, Size: 2606 bytes --]

On Sat, May 14, 2022 at 03:18:59PM +0100, Jonathan Cameron wrote:
> On Sat, 14 May 2022 14:57:49 +0200
> Bartosz Golaszewski <brgl@bgdev.pl> wrote:
> 
> > On Tue, May 10, 2022 at 7:31 PM William Breathitt Gray
> > <william.gray@linaro.org> wrote:
> > >
> > > PC104 cards and similar devices do not need to access I/O ports directly
> > > via inb()/outb() and can instead use the more typical I/O memory
> > > ioread8()/iowrite8() accessor calls by first calling ioport_map(). This
> > > patchset converts the relevant PC104/ISA card drivers to do such. With
> > > these drivers now utilizing I/O memory accessor calls, work can be done
> > > to consolidate some similar devices (e.g. 104-idio-16, pci-idio-16,
> > > etc.) into a unified driver in a future patchset.
> > >
> > > This patchset spawned from a suggestion made in another thread titled
> > > "gpio: add HAS_IOPORT dependencies":
> > > https://lore.kernel.org/all/c3a3cdd99d4645e2bbbe082808cbb2a5@AcuMS.aculab.com/
> > >
> > > William Breathitt Gray (8):
> > >   counter: 104-quad-8: Utilize iomap interface
> > >   gpio: 104-dio-48e: Utilize iomap interface
> > >   gpio: 104-idi-48: Utilize iomap interface
> > >   gpio: 104-idio-16: Utilize iomap interface
> > >   gpio: gpio-mm: Utilize iomap interface
> > >   gpio: ws16c48: Utilize iomap interface
> > >   iio: adc: stx104: Utilize iomap interface
> > >   iio: dac: cio-dac: Utilize iomap interface
> > >
> > >  drivers/counter/104-quad-8.c    | 169 +++++++++++++++++---------------
> > >  drivers/gpio/gpio-104-dio-48e.c |  63 ++++++------
> > >  drivers/gpio/gpio-104-idi-48.c  |  27 ++---
> > >  drivers/gpio/gpio-104-idio-16.c |  33 ++++---
> > >  drivers/gpio/gpio-gpio-mm.c     |  43 ++++----
> > >  drivers/gpio/gpio-ws16c48.c     |  65 ++++++------
> > >  drivers/iio/adc/stx104.c        |  56 ++++++-----
> > >  drivers/iio/dac/cio-dac.c       |  14 +--
> > >  8 files changed, 248 insertions(+), 222 deletions(-)
> > >
> > >
> > > base-commit: ce522ba9ef7e2d9fb22a39eb3371c0c64e2a433e
> > > --
> > > 2.35.3
> > >  
> > 
> > I don't see any dependencies so applied the GPIO part.
> Likewise, I've applied the IIO ones. Initially pushed out as testing
> to see if 0-day finds any issues. Given timing, we may well be looking
> at next merge window now though.
> 
> Thanks,
> 
> Jonathan
> 
> > 
> > Bart

Thanks, I'll pick up the remaining Counter patch in my tree. I'm going
to leave it in the tree as well until the next merge window to give some
time for others to test before it's released.

William Breathitt Gray

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