[PATCH v5 2/2] staging: vt6655: Added missing BE support in CARDbGetCurrentTSF

From: Philipp Hortmann
Date: Sun May 01 2022 - 15:17:53 EST


Added missing big-endian support in CARDbGetCurrentTSF.

Reported-by: David Laight <David.Laight@xxxxxxxxxx>
Signed-off-by: Philipp Hortmann <philipp.g.hortmann@xxxxxxxxx>
---
V1 -> V2: Replaced #ifdef __BIG_ENDIAN with le64_to_cpu()
Updated below example

Code for testing:
low = ioread32(iobase + MAC_REG_TSFCNTR);
high = ioread32(iobase + MAC_REG_TSFCNTR + 4);
*pqwCurrTSF = le64_to_cpu(low + ((u64)high << 32));
dev_info(&priv->pcid->dev, "CARDbGetCurrentTSF little endian: 0x%016llx", *pqwCurrTSF);
dev_info(&priv->pcid->dev, "CARDbGetCurrentTSF big-endian: 0x%016llx", be64_to_cpu(low + ((u64)high << 32)));

Log of the microsecond counter:
vt6655 0000:01:05.0: CARDbGetCurrentTSF little endian: 0x00 00 00 03 6a ce 0d 7d
vt6655 0000:01:05.0: CARDbGetCurrentTSF big-endian: 0x7d 0d ce 6a 03 00 00 00
vt6655 0000:01:05.0: CARDbGetCurrentTSF little endian: 0x00 00 00 03 6a ce 0d 89
vt6655 0000:01:05.0: CARDbGetCurrentTSF big-endian: 0x89 0d ce 6a 03 00 00 00
---
drivers/staging/vt6655/card.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/staging/vt6655/card.c b/drivers/staging/vt6655/card.c
index 0dd13e475d6b..431890e6b8d2 100644
--- a/drivers/staging/vt6655/card.c
+++ b/drivers/staging/vt6655/card.c
@@ -756,7 +756,7 @@ bool CARDbGetCurrentTSF(struct vnt_private *priv, u64 *pqwCurrTSF)
return false;
low = ioread32(iobase + MAC_REG_TSFCNTR);
high = ioread32(iobase + MAC_REG_TSFCNTR + 4);
- *pqwCurrTSF = low + ((u64)high << 32);
+ *pqwCurrTSF = le64_to_cpu(low + ((u64)high << 32));

return true;
}
--
2.25.1