write in 30M

hc

2024-02-20 ea08eeccae9297f7aabd2ef7f0c2517ac4549acc

 kernel/drivers/counter/104-quad-8.c
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@@ -62,10 +62,6 @@
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 #define QUAD8_REG_CHAN_OP 0x11
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 #define QUAD8_REG_INDEX_INPUT_LEVELS 0x16
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 #define QUAD8_DIFF_ENCODER_CABLE_STATUS 0x17
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-/* Borrow Toggle flip-flop */
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-#define QUAD8_FLAG_BT BIT(0)
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-/* Carry Toggle flip-flop */
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-#define QUAD8_FLAG_CT BIT(1)
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 /* Error flag */
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 #define QUAD8_FLAG_E BIT(4)
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 /* Up/Down flag */
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@@ -104,9 +100,6 @@
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 {
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 	struct quad8_iio *const priv = iio_priv(indio_dev);
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 	const int base_offset = priv->base + 2 * chan->channel;
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-	unsigned int flags;
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-	unsigned int borrow;
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-	unsigned int carry;
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 	int i;
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 	switch (mask) {
..
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@@ -117,12 +110,7 @@
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 			return IIO_VAL_INT;
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 		}
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-		flags = inb(base_offset + 1);
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-		borrow = flags & QUAD8_FLAG_BT;
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-		carry = !!(flags & QUAD8_FLAG_CT);
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-
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-		/* Borrow XOR Carry effectively doubles count range */
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-		*val = (borrow ^ carry) << 24;
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+		*val = 0;
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 		mutex_lock(&priv->lock);
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..
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@@ -643,17 +631,9 @@
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 {
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 	struct quad8_iio *const priv = counter->priv;
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 	const int base_offset = priv->base + 2 * count->id;
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-	unsigned int flags;
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-	unsigned int borrow;
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-	unsigned int carry;
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 	int i;
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-	flags = inb(base_offset + 1);
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-	borrow = flags & QUAD8_FLAG_BT;
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-	carry = !!(flags & QUAD8_FLAG_CT);
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-
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-	/* Borrow XOR Carry effectively doubles count range */
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-	*val = (unsigned long)(borrow ^ carry) << 24;
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+	*val = 0;
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 	mutex_lock(&priv->lock);
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..
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@@ -1198,8 +1178,8 @@
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 	mutex_unlock(&priv->lock);
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-	/* By default 0x1FFFFFF (25 bits unsigned) is maximum count */
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-	return sprintf(buf, "33554431\n");
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+	/* By default 0xFFFFFF (24 bits unsigned) is maximum count */
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+	return sprintf(buf, "16777215\n");
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 }
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 static ssize_t quad8_count_ceiling_write(struct counter_device *counter,