With posix timers having become optional, we get a build error with the cpts time sync option of the CPSW driver: drivers/net/ethernet/ti/cpts.c: In function 'cpts_find_ts': drivers/net/ethernet/ti/cpts.c:291:23: error: implicit declaration of function 'ptp_classify_raw';did you mean 'ptp_classifier_init'? [-Werror=implicit-function-declaration] This adds a hard dependency on PTP_CLOCK to avoid the problem, as building it without PTP support makes no sense anyway. Fixes: baa73d9e478f ("posix-timers: Make them configurable") Cc: Nicolas Pitre <nicolas.pitre@xxxxxxxxxx> Cc: stable@xxxxxxxxxxxxxxx Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx> --- v2: use 'depends on' instead of 'select' as suggested by Nico. --- drivers/net/ethernet/ti/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/ethernet/ti/Kconfig b/drivers/net/ethernet/ti/Kconfig index d923890a9fda..9e631952b86f 100644 --- a/drivers/net/ethernet/ti/Kconfig +++ b/drivers/net/ethernet/ti/Kconfig @@ -76,7 +76,7 @@ config TI_CPSW config TI_CPTS bool "TI Common Platform Time Sync (CPTS) Support" depends on TI_CPSW || TI_KEYSTONE_NETCP - imply PTP_1588_CLOCK + depends on PTP_1588_CLOCK ---help--- This driver supports the Common Platform Time Sync unit of the CPSW Ethernet Switch and Keystone 2 1g/10g Switch Subsystem. -- 2.9.0