diff mbox series

[net-next,v3,1/4] net: phy: at803x: generalize cdt fault length function

Message ID 20240103124637.3078-2-ansuelsmth@gmail.com (mailing list archive)
State Superseded
Delegated to: Netdev Maintainers
Headers show
Series net: phy: at803x: even more generalization | expand

Checks

Context Check Description
netdev/series_format success Posting correctly formatted
netdev/tree_selection success Clearly marked for net-next
netdev/ynl success Generated files up to date; no warnings/errors; no diff in generated;
netdev/fixes_present success Fixes tag not required for -next series
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 1113 this patch: 1113
netdev/cc_maintainers success CCed 7 of 7 maintainers
netdev/build_clang success Errors and warnings before: 1140 this patch: 1140
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/deprecated_api success None detected
netdev/check_selftest success No net selftest shell script
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 1140 this patch: 1140
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 40 lines checked
netdev/build_clang_rust success No Rust files in patch. Skipping build
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0

Commit Message

Christian Marangi Jan. 3, 2024, 12:46 p.m. UTC 
Generalize cable test fault length function since they all base on the
same magic values (already reverse engineered to understand the meaning
of it) to have consistenct values on every PHY.

Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
---
 drivers/net/phy/at803x.c | 13 ++++++-------
 1 file changed, 6 insertions(+), 7 deletions(-)

Comments

Simon Horman Jan. 4, 2024, 1:07 p.m. UTC | #1 
On Wed, Jan 03, 2024 at 01:46:32PM +0100, Christian Marangi wrote:
> Generalize cable test fault length function since they all base on the
> same magic values (already reverse engineered to understand the meaning
> of it) to have consistenct values on every PHY.
> 
> Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>

Reviewed-by: Simon Horman <horms@kernel.org>
diff mbox series

Patch

diff --git a/drivers/net/phy/at803x.c b/drivers/net/phy/at803x.c
index aaf6c654aaed..acf483fa0887 100644
--- a/drivers/net/phy/at803x.c
+++ b/drivers/net/phy/at803x.c
@@ -1192,10 +1192,8 @@  static bool at803x_cdt_fault_length_valid(u16 status)
 	return false;
 }
 
-static int at803x_cdt_fault_length(u16 status)
+static int at803x_cdt_fault_length(int dt)
 {
-	int dt;
-
 	/* According to the datasheet the distance to the fault is
 	 * DELTA_TIME * 0.824 meters.
 	 *
@@ -1211,8 +1209,6 @@  static int at803x_cdt_fault_length(u16 status)
 	 * With a VF of 0.69 we get the factor 0.824 mentioned in the
 	 * datasheet.
 	 */
-	dt = FIELD_GET(AT803X_CDT_STATUS_DELTA_TIME_MASK, status);
-
 	return (dt * 824) / 10;
 }
 
@@ -1265,9 +1261,11 @@  static int at803x_cable_test_one_pair(struct phy_device *phydev, int pair)
 	ethnl_cable_test_result(phydev, ethtool_pair[pair],
 				at803x_cable_test_result_trans(val));
 
-	if (at803x_cdt_fault_length_valid(val))
+	if (at803x_cdt_fault_length_valid(val)) {
+		val = FIELD_GET(AT803X_CDT_STATUS_DELTA_TIME_MASK, val);
 		ethnl_cable_test_fault_length(phydev, ethtool_pair[pair],
 					      at803x_cdt_fault_length(val));
+	}
 
 	return 1;
 }
@@ -1994,7 +1992,8 @@  static int qca808x_cdt_fault_length(struct phy_device *phydev, int pair)
 	if (val < 0)
 		return val;
 
-	return (FIELD_GET(QCA808X_CDT_DIAG_LENGTH, val) * 824) / 10;
+	val = FIELD_GET(QCA808X_CDT_DIAG_LENGTH, val);
+	return at803x_cdt_fault_length(val);
 }
 
 static int qca808x_cable_test_start(struct phy_device *phydev)