64afcbad3d
It will be used on NanoPi R2C and OrangePi R1 Plus LTS board. Signed-off-by: Tianling Shen <cnsztl@immortalwrt.org>
56 lines
1.4 KiB
Diff
56 lines
1.4 KiB
Diff
From bdb6cfe7512f7a214815a3092f0be50963dcacbc Mon Sep 17 00:00:00 2001
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From: "Russell King (Oracle)" <rmk+kernel@armlinux.org.uk>
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Date: Sat, 18 Jun 2022 11:28:32 +0100
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Subject: [PATCH] net: mii: add mii_bmcr_encode_fixed()
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Add a function to encode a fixed speed/duplex to a BMCR value.
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Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
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Signed-off-by: David S. Miller <davem@davemloft.net>
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---
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include/linux/mii.h | 35 +++++++++++++++++++++++++++++++++++
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1 file changed, 35 insertions(+)
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--- a/include/linux/mii.h
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+++ b/include/linux/mii.h
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@@ -595,4 +595,39 @@ static inline u8 mii_resolve_flowctrl_fd
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return cap;
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}
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+/**
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+ * mii_bmcr_encode_fixed - encode fixed speed/duplex settings to a BMCR value
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+ * @speed: a SPEED_* value
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+ * @duplex: a DUPLEX_* value
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+ *
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+ * Encode the speed and duplex to a BMCR value. 2500, 1000, 100 and 10 Mbps are
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+ * supported. 2500Mbps is encoded to 1000Mbps. Other speeds are encoded as 10
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+ * Mbps. Unknown duplex values are encoded to half-duplex.
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+ */
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+static inline u16 mii_bmcr_encode_fixed(int speed, int duplex)
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+{
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+ u16 bmcr;
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+
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+ switch (speed) {
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+ case SPEED_2500:
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+ case SPEED_1000:
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+ bmcr = BMCR_SPEED1000;
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+ break;
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+
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+ case SPEED_100:
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+ bmcr = BMCR_SPEED100;
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+ break;
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+
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+ case SPEED_10:
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+ default:
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+ bmcr = BMCR_SPEED10;
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+ break;
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+ }
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+
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+ if (duplex == DUPLEX_FULL)
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+ bmcr |= BMCR_FULLDPLX;
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+
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+ return bmcr;
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+}
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+
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#endif /* __LINUX_MII_H__ */
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