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Subject[RFC 4/4] counter: 104-quad-8: Update count_read/count_write/signal_read callbacks
Date
The count_read and count_write callbacks pass unsigned long now, while
the signal_read callback passes an enum counter_signal_value.

Signed-off-by: William Breathitt Gray <vilhelm.gray@gmail.com>
---
drivers/counter/104-quad-8.c | 33 ++++++++++-----------------------
1 file changed, 10 insertions(+), 23 deletions(-)

diff --git a/drivers/counter/104-quad-8.c b/drivers/counter/104-quad-8.c
index 00b113f4b958..17e67a84777d 100644
--- a/drivers/counter/104-quad-8.c
+++ b/drivers/counter/104-quad-8.c
@@ -562,11 +562,10 @@ static const struct iio_chan_spec quad8_channels[] = {
};

static int quad8_signal_read(struct counter_device *counter,
- struct counter_signal *signal, struct counter_signal_read_value *val)
+ struct counter_signal *signal, enum counter_signal_value *val)
{
const struct quad8_iio *const priv = counter->priv;
unsigned int state;
- enum counter_signal_level level;

/* Only Index signal levels can be read */
if (signal->id < 16)
@@ -575,22 +574,19 @@ static int quad8_signal_read(struct counter_device *counter,
state = inb(priv->base + QUAD8_REG_INDEX_INPUT_LEVELS)
& BIT(signal->id - 16);

- level = (state) ? COUNTER_SIGNAL_LEVEL_HIGH : COUNTER_SIGNAL_LEVEL_LOW;
-
- counter_signal_read_value_set(val, COUNTER_SIGNAL_LEVEL, &level);
+ *val = (state) ? COUNTER_SIGNAL_HIGH : COUNTER_SIGNAL_LOW;

return 0;
}

static int quad8_count_read(struct counter_device *counter,
- struct counter_count *count, struct counter_count_read_value *val)
+ struct counter_count *count, unsigned long *val)
{
const struct quad8_iio *const priv = counter->priv;
const int base_offset = priv->base + 2 * count->id;
unsigned int flags;
unsigned int borrow;
unsigned int carry;
- unsigned long position;
int i;

flags = inb(base_offset + 1);
@@ -598,36 +594,27 @@ static int quad8_count_read(struct counter_device *counter,
carry = !!(flags & QUAD8_FLAG_CT);

/* Borrow XOR Carry effectively doubles count range */
- position = (unsigned long)(borrow ^ carry) << 24;
+ *val = (unsigned long)(borrow ^ carry) << 24;

/* Reset Byte Pointer; transfer Counter to Output Latch */
outb(QUAD8_CTR_RLD | QUAD8_RLD_RESET_BP | QUAD8_RLD_CNTR_OUT,
base_offset + 1);

for (i = 0; i < 3; i++)
- position |= (unsigned long)inb(base_offset) << (8 * i);
-
- counter_count_read_value_set(val, COUNTER_COUNT_POSITION, &position);
+ *val |= (unsigned long)inb(base_offset) << (8 * i);

return 0;
}

static int quad8_count_write(struct counter_device *counter,
- struct counter_count *count, struct counter_count_write_value *val)
+ struct counter_count *count, unsigned long val)
{
const struct quad8_iio *const priv = counter->priv;
const int base_offset = priv->base + 2 * count->id;
- int err;
- unsigned long position;
int i;

- err = counter_count_write_value_get(&position, COUNTER_COUNT_POSITION,
- val);
- if (err)
- return err;
-
/* Only 24-bit values are supported */
- if (position > 0xFFFFFF)
+ if (val > 0xFFFFFF)
return -EINVAL;

/* Reset Byte Pointer */
@@ -635,7 +622,7 @@ static int quad8_count_write(struct counter_device *counter,

/* Counter can only be set via Preset Register */
for (i = 0; i < 3; i++)
- outb(position >> (8 * i), base_offset);
+ outb(val >> (8 * i), base_offset);

/* Transfer Preset Register to Counter */
outb(QUAD8_CTR_RLD | QUAD8_RLD_PRESET_CNTR, base_offset + 1);
@@ -644,9 +631,9 @@ static int quad8_count_write(struct counter_device *counter,
outb(QUAD8_CTR_RLD | QUAD8_RLD_RESET_BP, base_offset + 1);

/* Set Preset Register back to original value */
- position = priv->preset[count->id];
+ val = priv->preset[count->id];
for (i = 0; i < 3; i++)
- outb(position >> (8 * i), base_offset);
+ outb(val >> (8 * i), base_offset);

/* Reset Borrow, Carry, Compare, and Sign flags */
outb(QUAD8_CTR_RLD | QUAD8_RLD_RESET_FLAGS, base_offset + 1);
--
2.23.0
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