[PATCH 4/6] miidev: consistent md and mw on phy regs

[Johannes Stezenbach]

The dump generated by "md -w -s /dev/phy0"
suggests individual registers need to be
addressed by byte offset, not by register number.
E.g. to set the autonegotiation advertisement register
for 10Mbit only, use "mw -w -d /dev/phy0 8+2 0x0061".
The current mix of offset == register number, but
count == byte count is unintuitive.

Also, to be consistent with "md" on /dev/mem, round up
the count so "8+1" also works to access one register.
However, no attempt is made to do read-modify-write
single byte writes.

Signed-off-by: Johannes Stezenbach <js at sig21.net>
---
 drivers/net/miidev.c |   12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/drivers/net/miidev.c b/drivers/net/miidev.c
index 98ad790..1c75b87 100644
--- a/drivers/net/miidev.c
+++ b/drivers/net/miidev.c
@@ -204,11 +204,11 @@ static ssize_t miidev_read(struct cdev *cdev, void *_buf, size_t count, ulong of
 	uint16_t *buf = _buf;
 	struct mii_device *mdev = cdev->priv;
 
-	while (i > 1) {
-		*buf = mii_read(mdev, mdev->address, offset);
+	while (i > 0) {
+		*buf = mii_read(mdev, mdev->address, offset / 2);
 		buf++;
 		i -= 2;
-		offset++;
+		offset += 2;
 	}
 
 	return count;
@@ -220,11 +220,11 @@ static ssize_t miidev_write(struct cdev *cdev, const void *_buf, size_t count, u
 	const uint16_t *buf = _buf;
 	struct mii_device *mdev = cdev->priv;
 
-	while (i > 1) {
-		mii_write(mdev, mdev->address, offset, *buf);
+	while (i > 0) {
+		mii_write(mdev, mdev->address, offset / 2, *buf);
 		buf++;
 		i -= 2;
-		offset++;
+		offset += 2;
 	}
 
 	return count;
-- 
1.7.10.4