linux-kernel - [PATCH v2 1/2] net: macb: Kconfig: Make MACB depend on COMMON

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Date:   Tue, 25 Jun 2019 01:48:27 -0700
From:   Palmer Dabbelt <palmer@...ive.com>
To:     nicolas.ferre@...rochip.com, harinik@...inx.com
Cc:     davem@...emloft.net, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, Palmer Dabbelt <palmer@...ive.com>
Subject: [PATCH v2 1/2] net: macb: Kconfig: Make MACB depend on COMMON_CLK

commit c218ad559020 ("macb: Add support for SiFive FU540-C000") added a
dependency on the common clock framework to the macb driver, but didn't
express that dependency in Kconfig.  As a result macb now fails to
compile on systems without COMMON_CLK, which specifically causes a build
failure on powerpc allyesconfig.

This patch adds the dependency, which results in the macb driver no
longer being selectable on systems without the common clock framework.
All known systems that have this device already support the common clock
framework, so this should not cause trouble for any uses.  Supporting
both the FU540-C000 and systems without COMMON_CLK is quite ugly.

I've build tested this on powerpc allyesconfig and RISC-V defconfig
(which selects MACB), but I have not even booted the resulting kernels.

Fixes: c218ad559020 ("macb: Add support for SiFive FU540-C000")
Signed-off-by: Palmer Dabbelt <palmer@...ive.com>
---
 drivers/net/ethernet/cadence/Kconfig | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/cadence/Kconfig b/drivers/net/ethernet/cadence/Kconfig
index 1766697c9c5a..64d8d6ee7739 100644
--- a/drivers/net/ethernet/cadence/Kconfig
+++ b/drivers/net/ethernet/cadence/Kconfig
@@ -21,7 +21,7 @@ if NET_VENDOR_CADENCE

 config MACB
 	tristate "Cadence MACB/GEM support"
-	depends on HAS_DMA
+	depends on HAS_DMA && COMMON_CLK
 	select PHYLIB
 	---help---
 	  The Cadence MACB ethernet interface is found on many Atmel AT32 and
@@ -42,7 +42,7 @@ config MACB_USE_HWSTAMP

 config MACB_PCI
 	tristate "Cadence PCI MACB/GEM support"
-	depends on MACB && PCI && COMMON_CLK
+	depends on MACB && PCI
 	---help---
 	  This is PCI wrapper for MACB driver.

-- 
2.21.0