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Date:   Sat, 12 Feb 2022 21:45:44 +0100
From:   Horatiu Vultur <>
To:     <>, <>
CC:     <>, <>,
        <>, <>,
        Horatiu Vultur <>,
        kernel test robot <>
Subject: [PATCH net-next] net: lan966x: Fix when CONFIG_PTP_1588_CLOCK is compiled as module

When CONFIG_PTP_1588_CLOCK is compiled as a module, then the linking of
the lan966x fails because it can't find references to the following
functions 'ptp_clock_index', 'ptp_clock_register' and

The fix consists in adding CONFIG_PTP_1588_CLOCK_OPTIONAL as a
dependency for the driver.

Fixes: d096459494a887 ("net: lan966x: Add support for ptp clocks")
Reported-by: kernel test robot <>
Signed-off-by: Horatiu Vultur <>
 drivers/net/ethernet/microchip/lan966x/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/ethernet/microchip/lan966x/Kconfig b/drivers/net/ethernet/microchip/lan966x/Kconfig
index ac273f84b69e..4241ff0e5098 100644
--- a/drivers/net/ethernet/microchip/lan966x/Kconfig
+++ b/drivers/net/ethernet/microchip/lan966x/Kconfig
@@ -1,5 +1,6 @@
 config LAN966X_SWITCH
 	tristate "Lan966x switch driver"
+	depends on PTP_1588_CLOCK_OPTIONAL
 	depends on HAS_IOMEM
 	depends on OF
 	depends on NET_SWITCHDEV

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