netdev - [PATCH net-next v2 3/3] net: amd-xgbe: Disable the CDR workaround path for Yellow Carp Devices

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Date:   Mon, 20 Dec 2021 19:24:28 +0530
From:   Raju Rangoju <rrangoju@....com>
To:     <thomas.lendacky@....com>, <davem@...emloft.net>, <kuba@...nel.org>
CC:     <netdev@...r.kernel.org>, <Shyam-sundar.S-k@....com>,
        <Sudheesh.Mavila@....com>, <Raju.Rangoju@....com>
Subject: [PATCH net-next v2 3/3] net: amd-xgbe: Disable the CDR workaround path for Yellow Carp Devices

From: Raju Rangoju <Raju.Rangoju@....com>

Yellow Carp Ethernet devices do not require
Autonegotiation CDR workaround, hence disable the same.

Co-developed-by: Shyam Sundar S K <Shyam-sundar.S-k@....com>
Signed-off-by: Shyam Sundar S K <Shyam-sundar.S-k@....com>
Signed-off-by: Raju Rangoju <Raju.Rangoju@....com>

---
changelog:
v1->v2:
 - Add a blank line before the comment
---
 drivers/net/ethernet/amd/xgbe/xgbe-pci.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/amd/xgbe/xgbe-pci.c b/drivers/net/ethernet/amd/xgbe/xgbe-pci.c
index 0f930b17980e..efdcf484a510 100644
--- a/drivers/net/ethernet/amd/xgbe/xgbe-pci.c
+++ b/drivers/net/ethernet/amd/xgbe/xgbe-pci.c
@@ -282,6 +282,9 @@ static int xgbe_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 		   (rdev->device == 0x14b5)) {
 		pdata->xpcs_window_def_reg = PCS_V2_YC_WINDOW_DEF;
 		pdata->xpcs_window_sel_reg = PCS_V2_YC_WINDOW_SELECT;
+
+		/* Yellow Carp devices do not need cdr workaround */
+		pdata->vdata->an_cdr_workaround = 0;
 	} else {
 		pdata->xpcs_window_def_reg = PCS_V2_WINDOW_DEF;
 		pdata->xpcs_window_sel_reg = PCS_V2_WINDOW_SELECT;
@@ -464,7 +467,7 @@ static int __maybe_unused xgbe_pci_resume(struct device *dev)
 	return ret;
 }
 
-static const struct xgbe_version_data xgbe_v2a = {
+static struct xgbe_version_data xgbe_v2a = {
 	.init_function_ptrs_phy_impl	= xgbe_init_function_ptrs_phy_v2,
 	.xpcs_access			= XGBE_XPCS_ACCESS_V2,
 	.mmc_64bit			= 1,
@@ -479,7 +482,7 @@ static const struct xgbe_version_data xgbe_v2a = {
 	.an_cdr_workaround		= 1,
 };
 
-static const struct xgbe_version_data xgbe_v2b = {
+static struct xgbe_version_data xgbe_v2b = {
 	.init_function_ptrs_phy_impl	= xgbe_init_function_ptrs_phy_v2,
 	.xpcs_access			= XGBE_XPCS_ACCESS_V2,
 	.mmc_64bit			= 1,
-- 
2.25.1