diff mbox series

[net-next,1/4] net: mii: add mii_bmcr_encode_fixed()

Message ID E1o2Vgu-0026Bs-7A@rmk-PC.armlinux.org.uk (mailing list archive)
State Accepted
Commit bdb6cfe7512f7a214815a3092f0be50963dcacbc
Delegated to: Netdev Maintainers
Headers show
Series introduce mii_bmcr_encode_fixed() | expand

Checks

Context Check Description
netdev/tree_selection success Clearly marked for net-next
netdev/fixes_present success Fixes tag not required for -next series
netdev/subject_prefix success Link
netdev/cover_letter success Series has a cover letter
netdev/patch_count success Link
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 877 this patch: 877
netdev/cc_maintainers warning 1 maintainers not CCed: linux@armlinux.org.uk
netdev/build_clang success Errors and warnings before: 367 this patch: 367
netdev/module_param success Was 0 now: 0
netdev/verify_signedoff success Signed-off-by tag matches author and committer
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: 813 this patch: 813
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 39 lines checked
netdev/kdoc success Errors and warnings before: 12 this patch: 12
netdev/source_inline success Was 0 now: 0

Commit Message

Russell King (Oracle) June 18, 2022, 10:28 a.m. UTC 
Add a function to encode a fixed speed/duplex to a BMCR value.

Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
---
 include/linux/mii.h | 35 +++++++++++++++++++++++++++++++++++
 1 file changed, 35 insertions(+)
diff mbox series

Patch

diff --git a/include/linux/mii.h b/include/linux/mii.h
index 5ee13083cec7..d5a959ce4877 100644
--- a/include/linux/mii.h
+++ b/include/linux/mii.h
@@ -545,4 +545,39 @@  static inline u8 mii_resolve_flowctrl_fdx(u16 lcladv, u16 rmtadv)
 	return cap;
 }
 
+/**
+ * mii_bmcr_encode_fixed - encode fixed speed/duplex settings to a BMCR value
+ * @speed: a SPEED_* value
+ * @duplex: a DUPLEX_* value
+ *
+ * Encode the speed and duplex to a BMCR value. 2500, 1000, 100 and 10 Mbps are
+ * supported. 2500Mbps is encoded to 1000Mbps. Other speeds are encoded as 10
+ * Mbps. Unknown duplex values are encoded to half-duplex.
+ */
+static inline u16 mii_bmcr_encode_fixed(int speed, int duplex)
+{
+	u16 bmcr;
+
+	switch (speed) {
+	case SPEED_2500:
+	case SPEED_1000:
+		bmcr = BMCR_SPEED1000;
+		break;
+
+	case SPEED_100:
+		bmcr = BMCR_SPEED100;
+		break;
+
+	case SPEED_10:
+	default:
+		bmcr = BMCR_SPEED10;
+		break;
+	}
+
+	if (duplex == DUPLEX_FULL)
+		bmcr |= BMCR_FULLDPLX;
+
+	return bmcr;
+}
+
 #endif /* __LINUX_MII_H__ */