netdev - [PATCH RFC net-next 03/12] net: mtk_eth_soc: add mask and update PCS speed definitions

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Date:   Wed, 06 Apr 2022 15:35:09 +0100
From:   "Russell King (Oracle)" <rmk+kernel@...linux.org.uk>
To:     Marek Behún <kabel@...nel.org>
Cc:     Felix Fietkau <nbd@....name>, John Crispin <john@...ozen.org>,
        Sean Wang <sean.wang@...iatek.com>,
        Mark Lee <Mark-MC.Lee@...iatek.com>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        netdev@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org
Subject: [PATCH RFC net-next 03/12] net: mtk_eth_soc: add mask and update PCS
 speed definitions

The PCS speed setting is a two bit field, but it is defined as two
separate bits. Add a bitfield mask for the speed definitions, an
 use the FIELD_PREP() macro to define each PCS speed.

Signed-off-by: Russell King (Oracle) <rmk+kernel@...linux.org.uk>
---
 drivers/net/ethernet/mediatek/mtk_eth_soc.h | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/mediatek/mtk_eth_soc.h b/drivers/net/ethernet/mediatek/mtk_eth_soc.h
index 8a10761adda0..f31ef594008a 100644
--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.h
+++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.h
@@ -17,6 +17,7 @@
 #include <linux/phylink.h>
 #include <linux/rhashtable.h>
 #include <linux/dim.h>
+#include <linux/bitfield.h>
 #include "mtk_ppe.h"
 
 #define MTK_QDMA_PAGE_SIZE	2048
@@ -485,9 +486,10 @@
 #define SGMSYS_SGMII_MODE		0x20
 #define SGMII_IF_MODE_BIT0		BIT(0)
 #define SGMII_SPEED_DUPLEX_AN		BIT(1)
-#define SGMII_SPEED_10			0x0
-#define SGMII_SPEED_100			BIT(2)
-#define SGMII_SPEED_1000		BIT(3)
+#define SGMII_SPEED_MASK		GENMASK(3, 2)
+#define SGMII_SPEED_10			FIELD_PREP(SGMII_SPEED_MASK, 0)
+#define SGMII_SPEED_100			FIELD_PREP(SGMII_SPEED_MASK, 1)
+#define SGMII_SPEED_1000		FIELD_PREP(SGMII_SPEED_MASK, 2)
 #define SGMII_DUPLEX_FULL		BIT(4)
 #define SGMII_IF_MODE_BIT5		BIT(5)
 #define SGMII_REMOTE_FAULT_DIS		BIT(8)
-- 
2.30.2