netdev - [PATCH] net: ethernet: renesas: rswitch: Fix build error about ptp

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Date:   Thu, 10 Nov 2022 10:27:20 +0900
From:   Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>
To:     davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org,
        pabeni@...hat.com
Cc:     netdev@...r.kernel.org, linux-renesas-soc@...r.kernel.org,
        Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>,
        kernel test robot <lkp@...el.com>,
        Arnd Bergmann <arnd@...db.de>
Subject: [PATCH] net: ethernet: renesas: rswitch: Fix build error about ptp

If CONFIG_PTP_1588_CLOCK_OPTIONAL=m and CONFIG_RENESAS_ETHER_SWITCH=y,
the following build error happened:

    aarch64-linux-ld: DWARF error: could not find abbrev number 60
    drivers/net/ethernet/renesas/rswitch.o: in function `rswitch_get_ts_info':
    rswitch.c:(.text+0x408): undefined reference to `ptp_clock_index'
    aarch64-linux-ld: DWARF error: could not find abbrev number 1190123
    drivers/net/ethernet/renesas/rcar_gen4_ptp.o: in function `rcar_gen4_ptp_register':
    rcar_gen4_ptp.c:(.text+0x4dc): undefined reference to `ptp_clock_register'
    aarch64-linux-ld: drivers/net/ethernet/renesas/rcar_gen4_ptp.o: in function `rcar_gen4_ptp_unregister':
    rcar_gen4_ptp.c:(.text+0x584): undefined reference to `ptp_clock_unregister'

To fix the issue, add "depends on PTP_1588_CLOCK_OPTIONAL" into the
Kconfig.

Reported-by: kernel test robot <lkp@...el.com>
Suggested-by: Arnd Bergmann <arnd@...db.de>
Fixes: 6c6fa1a00ad3 ("net: ethernet: renesas: rswitch: Add R-Car Gen4 gPTP support")
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>
---
 drivers/net/ethernet/renesas/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/ethernet/renesas/Kconfig b/drivers/net/ethernet/renesas/Kconfig
index 7a5e26b6ea9b..3ceb57408ed0 100644
--- a/drivers/net/ethernet/renesas/Kconfig
+++ b/drivers/net/ethernet/renesas/Kconfig
@@ -45,6 +45,7 @@ config RAVB
 config RENESAS_ETHER_SWITCH
 	tristate "Renesas Ethernet Switch support"
 	depends on ARCH_RENESAS || COMPILE_TEST
+	depends on PTP_1588_CLOCK_OPTIONAL
 	select CRC32
 	select MII
 	select PHYLINK
-- 
2.25.1