diff mbox series

[RFC,net-next,2/6] net: phy: realtek: add get_rate_matching() for rtl822x/8251b PHYs

Message ID 20240227075151.793496-3-ericwouds@gmail.com (mailing list archive)
State Superseded
Delegated to: Netdev Maintainers
Headers show
Series rtl8221b/8251b add C45 instances and SerDes switching | 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: 940 this patch: 940
netdev/build_tools success No tools touched, skip
netdev/cc_maintainers success CCed 7 of 7 maintainers
netdev/build_clang success Errors and warnings before: 957 this patch: 957
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: 957 this patch: 957
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 77 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

Eric Woudstra Feb. 27, 2024, 7:51 a.m. UTC 
Uses vendor register to determine if SerDes is setup in rate-matching mode.

Rate-matching only supported when SerDes is set to 2500base-x.

Signed-off-by: Eric Woudstra <ericwouds@gmail.com>
---
 drivers/net/phy/realtek.c | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)

Comments

Russell King (Oracle) Feb. 27, 2024, 10:37 a.m. UTC | #1 
On Tue, Feb 27, 2024 at 08:51:47AM +0100, Eric Woudstra wrote:
> Uses vendor register to determine if SerDes is setup in rate-matching mode.
> 
> Rate-matching only supported when SerDes is set to 2500base-x.
> 
> Signed-off-by: Eric Woudstra <ericwouds@gmail.com>

Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>

Thanks!
diff mbox series

Patch

diff --git a/drivers/net/phy/realtek.c b/drivers/net/phy/realtek.c
index 67cffe9b7d5d..75c4f3e14371 100644
--- a/drivers/net/phy/realtek.c
+++ b/drivers/net/phy/realtek.c
@@ -723,6 +723,28 @@  static int rtl822x_config_init(struct phy_device *phydev)
 	return phy_write_mmd(phydev, MDIO_MMD_VEND1, 0x6f11, 0x8020);
 }
 
+static int rtl822x_get_rate_matching(struct phy_device *phydev,
+				     phy_interface_t iface)
+{
+	int val;
+
+	/* Only rate matching at 2500base-x */
+	if (iface != PHY_INTERFACE_MODE_2500BASEX)
+		return RATE_MATCH_NONE;
+
+	val = phy_read_mmd(phydev, MDIO_MMD_VEND1, RTL822X_VND1_SERDES_OPTION);
+	if (val < 0)
+		return val;
+
+	switch (val & RTL822X_VND1_SERDES_OPTION_MODE_MASK) {
+	case RTL822X_VND1_SERDES_OPTION_MODE_2500BASEX:
+		return RATE_MATCH_PAUSE;
+	/* case RTL822X_VND1_SERDES_OPTION_MODE_2500BASEX_SGMII: */
+	default:
+		return RATE_MATCH_NONE;
+	}
+}
+
 static int rtl822x_get_features(struct phy_device *phydev)
 {
 	int val;
@@ -1062,6 +1084,7 @@  static struct phy_driver realtek_drvs[] = {
 		.get_features	= rtl822x_get_features,
 		.config_aneg	= rtl822x_config_aneg,
 		.config_init    = rtl822x_config_init,
+		.get_rate_matching = rtl822x_get_rate_matching,
 		.read_status	= rtl822x_read_status,
 		.suspend	= genphy_suspend,
 		.resume		= rtlgen_resume,
@@ -1075,6 +1098,7 @@  static struct phy_driver realtek_drvs[] = {
 		.get_features	= rtl822x_get_features,
 		.config_aneg	= rtl822x_config_aneg,
 		.config_init    = rtl822x_config_init,
+		.get_rate_matching = rtl822x_get_rate_matching,
 		.read_status	= rtl822x_read_status,
 		.suspend	= genphy_suspend,
 		.resume		= rtlgen_resume,
@@ -1088,6 +1112,7 @@  static struct phy_driver realtek_drvs[] = {
 		.get_features   = rtl822x_get_features,
 		.config_aneg    = rtl822x_config_aneg,
 		.config_init    = rtl822x_config_init,
+		.get_rate_matching = rtl822x_get_rate_matching,
 		.read_status    = rtl822x_read_status,
 		.suspend        = genphy_suspend,
 		.resume         = rtlgen_resume,
@@ -1099,6 +1124,7 @@  static struct phy_driver realtek_drvs[] = {
 		.get_features   = rtl822x_get_features,
 		.config_aneg    = rtl822x_config_aneg,
 		.config_init    = rtl822x_config_init,
+		.get_rate_matching = rtl822x_get_rate_matching,
 		.read_status    = rtl822x_read_status,
 		.suspend        = genphy_suspend,
 		.resume         = rtlgen_resume,
@@ -1109,6 +1135,7 @@  static struct phy_driver realtek_drvs[] = {
 		.name           = "RTL8221B-VB-CG 2.5Gbps PHY",
 		.get_features   = rtl822x_get_features,
 		.config_init    = rtl822x_config_init,
+		.get_rate_matching = rtl822x_get_rate_matching,
 		.config_aneg    = rtl822x_config_aneg,
 		.read_status    = rtl822x_read_status,
 		.suspend        = genphy_suspend,
@@ -1121,6 +1148,7 @@  static struct phy_driver realtek_drvs[] = {
 		.get_features   = rtl822x_get_features,
 		.config_aneg    = rtl822x_config_aneg,
 		.config_init    = rtl822x_config_init,
+		.get_rate_matching = rtl822x_get_rate_matching,
 		.read_status    = rtl822x_read_status,
 		.suspend        = genphy_suspend,
 		.resume         = rtlgen_resume,
@@ -1132,6 +1160,7 @@  static struct phy_driver realtek_drvs[] = {
 		.get_features   = rtl822x_get_features,
 		.config_aneg    = rtl822x_config_aneg,
 		.config_init    = rtl822x_config_init,
+		.get_rate_matching = rtl822x_get_rate_matching,
 		.read_status    = rtl822x_read_status,
 		.suspend        = genphy_suspend,
 		.resume         = rtlgen_resume,