If PHYLINK is n, build fails:

drivers/net/ethernet/ti/am65-cpsw-ethtool.o: In function `am65_cpsw_set_link_ksettings':
am65-cpsw-ethtool.c:(.text+0x118): undefined reference to `phylink_ethtool_ksettings_set'
drivers/net/ethernet/ti/am65-cpsw-ethtool.o: In function `am65_cpsw_get_link_ksettings':
am65-cpsw-ethtool.c:(.text+0x138): undefined reference to `phylink_ethtool_ksettings_get'
drivers/net/ethernet/ti/am65-cpsw-ethtool.o: In function `am65_cpsw_set_eee':
am65-cpsw-ethtool.c:(.text+0x158): undefined reference to `phylink_ethtool_set_eee'

Select PHYLINK for TI_K3_AM65_CPSW_NUSS to fix this.

Fixes: e8609e69470f ("net: ethernet: ti: am65-cpsw: Convert to PHYLINK")
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
---
 drivers/net/ethernet/ti/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/ethernet/ti/Kconfig b/drivers/net/ethernet/ti/Kconfig
index affcf92cd3aa..fb30bc5d56cb 100644
--- a/drivers/net/ethernet/ti/Kconfig
+++ b/drivers/net/ethernet/ti/Kconfig
@@ -94,6 +94,7 @@ config TI_K3_AM65_CPSW_NUSS
 	depends on ARCH_K3 && OF && TI_K3_UDMA_GLUE_LAYER
 	select NET_DEVLINK
 	select TI_DAVINCI_MDIO
+	select PHYLINK
 	imply PHY_TI_GMII_SEL
 	depends on TI_K3_AM65_CPTS || !TI_K3_AM65_CPTS
 	help
-- 
2.17.1

Hello:

This patch was applied to netdev/net-next.git (master)
by Jakub Kicinski <kuba@kernel.org>:

On Sat, 9 Apr 2022 18:59:31 +0800 you wrote:
> If PHYLINK is n, build fails:
> 
> drivers/net/ethernet/ti/am65-cpsw-ethtool.o: In function `am65_cpsw_set_link_ksettings':
> am65-cpsw-ethtool.c:(.text+0x118): undefined reference to `phylink_ethtool_ksettings_set'
> drivers/net/ethernet/ti/am65-cpsw-ethtool.o: In function `am65_cpsw_get_link_ksettings':
> am65-cpsw-ethtool.c:(.text+0x138): undefined reference to `phylink_ethtool_ksettings_get'
> drivers/net/ethernet/ti/am65-cpsw-ethtool.o: In function `am65_cpsw_set_eee':
> am65-cpsw-ethtool.c:(.text+0x158): undefined reference to `phylink_ethtool_set_eee'
> 
> [...]

Here is the summary with links:
  - [-next] net: ethernet: ti: am65-cpsw: Fix build error without PHYLINK
    https://git.kernel.org/netdev/net-next/c/bfa323c659b1

You are awesome, thank you!
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On Sat, Apr 09, 2022 at 06:59:31PM +0800, YueHaibing wrote:
> If PHYLINK is n, build fails:
> 
> drivers/net/ethernet/ti/am65-cpsw-ethtool.o: In function `am65_cpsw_set_link_ksettings':
> am65-cpsw-ethtool.c:(.text+0x118): undefined reference to `phylink_ethtool_ksettings_set'
> drivers/net/ethernet/ti/am65-cpsw-ethtool.o: In function `am65_cpsw_get_link_ksettings':
> am65-cpsw-ethtool.c:(.text+0x138): undefined reference to `phylink_ethtool_ksettings_get'
> drivers/net/ethernet/ti/am65-cpsw-ethtool.o: In function `am65_cpsw_set_eee':
> am65-cpsw-ethtool.c:(.text+0x158): undefined reference to `phylink_ethtool_set_eee'
> 
> Select PHYLINK for TI_K3_AM65_CPSW_NUSS to fix this.
> 
> Fixes: e8609e69470f ("net: ethernet: ti: am65-cpsw: Convert to PHYLINK")
> Signed-off-by: YueHaibing <yuehaibing@huawei.com>

Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>

Thanks.

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