diff mbox series

[net-next,v2,2/3] net: phy: Add helper for getting tx amplitude gain

Message ID 20250120-dp83822-tx-swing-v2-2-07c99dc42627@liebherr.com (mailing list archive)
State New
Delegated to: Netdev Maintainers
Headers show
Series net: phy: dp83822: Add support for changing the transmit amplitude voltage | 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: 1 this patch: 1
netdev/build_tools success Errors and warnings before: 0 (+1) this patch: 0 (+1)
netdev/cc_maintainers success CCed 7 of 7 maintainers
netdev/build_clang success Errors and warnings before: 893 this patch: 893
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: 362 this patch: 362
netdev/checkpatch warning WARNING: line length of 87 exceeds 80 columns
netdev/build_clang_rust success No Rust files in patch. Skipping build
netdev/kdoc success Errors and warnings before: 69 this patch: 69
netdev/source_inline success Was 0 now: 0
netdev/contest success net-next-2025-01-20--15-00 (tests: 886)

Commit Message

Dimitri Fedrau via B4 Relay Jan. 20, 2025, 1:50 p.m. UTC 
From: Dimitri Fedrau <dimitri.fedrau@liebherr.com>

Add helper which returns the tx amplitude gain defined in device tree.
Modifying it can be necessary to compensate losses on the PCB and
connector, so the voltages measured on the RJ45 pins are conforming.

Signed-off-by: Dimitri Fedrau <dimitri.fedrau@liebherr.com>
---
 drivers/net/phy/phy_device.c | 20 ++++++++++++++++----
 include/linux/phy.h          |  3 +++
 2 files changed, 19 insertions(+), 4 deletions(-)
diff mbox series

Patch

diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c
index 46713d27412b76077d2e51e29b8d84f4f8f0a86d..7bc48f9493ceda21311748a3efa0a222dc0683dc 100644
--- a/drivers/net/phy/phy_device.c
+++ b/drivers/net/phy/phy_device.c
@@ -3096,7 +3096,7 @@  void phy_get_pause(struct phy_device *phydev, bool *tx_pause, bool *rx_pause)
 EXPORT_SYMBOL(phy_get_pause);
 
 #if IS_ENABLED(CONFIG_OF_MDIO)
-static int phy_get_int_delay_property(struct device *dev, const char *name)
+static int phy_get_u32_property(struct device *dev, const char *name)
 {
 	s32 int_delay;
 	int ret;
@@ -3108,7 +3108,7 @@  static int phy_get_int_delay_property(struct device *dev, const char *name)
 	return int_delay;
 }
 #else
-static int phy_get_int_delay_property(struct device *dev, const char *name)
+static int phy_get_u32_property(struct device *dev, const char *name)
 {
 	return -EINVAL;
 }
@@ -3137,7 +3137,7 @@  s32 phy_get_internal_delay(struct phy_device *phydev, struct device *dev,
 	int i;
 
 	if (is_rx) {
-		delay = phy_get_int_delay_property(dev, "rx-internal-delay-ps");
+		delay = phy_get_u32_property(dev, "rx-internal-delay-ps");
 		if (delay < 0 && size == 0) {
 			if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID ||
 			    phydev->interface == PHY_INTERFACE_MODE_RGMII_RXID)
@@ -3147,7 +3147,7 @@  s32 phy_get_internal_delay(struct phy_device *phydev, struct device *dev,
 		}
 
 	} else {
-		delay = phy_get_int_delay_property(dev, "tx-internal-delay-ps");
+		delay = phy_get_u32_property(dev, "tx-internal-delay-ps");
 		if (delay < 0 && size == 0) {
 			if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID ||
 			    phydev->interface == PHY_INTERFACE_MODE_RGMII_TXID)
@@ -3193,6 +3193,18 @@  s32 phy_get_internal_delay(struct phy_device *phydev, struct device *dev,
 }
 EXPORT_SYMBOL(phy_get_internal_delay);
 
+s32 phy_get_tx_amplitude_gain(struct phy_device *phydev, struct device *dev,
+			      enum ethtool_link_mode_bit_indices linkmode)
+{
+	switch (linkmode) {
+	case ETHTOOL_LINK_MODE_100baseT_Full_BIT:
+		return phy_get_u32_property(dev, "tx-amplitude-100base-tx-gain-milli");
+	default:
+		return -EINVAL;
+	}
+}
+EXPORT_SYMBOL(phy_get_tx_amplitude_gain);
+
 static int phy_led_set_brightness(struct led_classdev *led_cdev,
 				  enum led_brightness value)
 {
diff --git a/include/linux/phy.h b/include/linux/phy.h
index 19f076a71f9462cd37588a5da240a1d54df0fe0f..abdd768b7acece3db9ffb0f9de7d20cf86e72bc7 100644
--- a/include/linux/phy.h
+++ b/include/linux/phy.h
@@ -2114,6 +2114,9 @@  void phy_get_pause(struct phy_device *phydev, bool *tx_pause, bool *rx_pause);
 s32 phy_get_internal_delay(struct phy_device *phydev, struct device *dev,
 			   const int *delay_values, int size, bool is_rx);
 
+s32 phy_get_tx_amplitude_gain(struct phy_device *phydev, struct device *dev,
+			      enum ethtool_link_mode_bit_indices linkmode);
+
 void phy_resolve_pause(unsigned long *local_adv, unsigned long *partner_adv,
 		       bool *tx_pause, bool *rx_pause);