linux-kernel - [PATCH] [v2] phy: mediatek: allow compile-testing the hdmi phy

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Date:   Fri,  4 Dec 2020 14:56:43 +0100
From:   Arnd Bergmann <arnd@...nel.org>
To:     Chunfeng Yun <chunfeng.yun@...iatek.com>,
        Kishon Vijay Abraham I <kishon@...com>,
        Vinod Koul <vkoul@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        CK Hu <ck.hu@...iatek.com>,
        Chun-Kuang Hu <chunkuang.hu@...nel.org>
Cc:     Arnd Bergmann <arnd@...db.de>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        Colin Ian King <colin.king@...onical.com>,
        Tiezhu Yang <yangtiezhu@...ngson.cn>,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH] [v2] phy: mediatek: allow compile-testing the hdmi phy

From: Arnd Bergmann <arnd@...db.de>

Compile-testing the DRM_MEDIATEK_HDMI driver shows two missing
dependencies, one results in a link failure:

arm-linux-gnueabi-ld: drivers/phy/mediatek/phy-mtk-hdmi.o: in function `mtk_hdmi_phy_probe':
phy-mtk-hdmi.c:(.text+0xd8): undefined reference to `__clk_get_name'
arm-linux-gnueabi-ld: phy-mtk-hdmi.c:(.text+0x12c): undefined reference to `devm_clk_register'
arm-linux-gnueabi-ld: phy-mtk-hdmi.c:(.text+0x250): undefined reference to `of_clk_add_provider'
arm-linux-gnueabi-ld: phy-mtk-hdmi.c:(.text+0x298): undefined reference to `of_clk_src_simple_get'

The other one is a harmless warning:

WARNING: unmet direct dependencies detected for PHY_MTK_HDMI
  Depends on [n]: ARCH_MEDIATEK [=n] && OF [=y]
  Selected by [y]:
  - DRM_MEDIATEK_HDMI [=y] && HAS_IOMEM [=y] && DRM_MEDIATEK [=y]

Fix these by adding dependencies on CONFIG_OF and CONFIG_COMMON_CLK.
With that done, there is also no reason against adding
CONFIG_COMPILE_TEST.

Fixes: b28be59a2e26 ("phy: mediatek: Move mtk_hdmi_phy driver into drivers/phy/mediatek folder")
Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
v2: reword changelog text
---
 drivers/phy/mediatek/Kconfig | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/phy/mediatek/Kconfig b/drivers/phy/mediatek/Kconfig
index 65ed26e40c9f..29a85b2738f8 100644
--- a/drivers/phy/mediatek/Kconfig
+++ b/drivers/phy/mediatek/Kconfig
@@ -40,7 +40,9 @@ config PHY_MTK_XSPHY
 
 config PHY_MTK_HDMI
 	tristate "MediaTek HDMI-PHY Driver"
-	depends on ARCH_MEDIATEK && OF
+	depends on ARCH_MEDIATEK || COMPILE_TEST
+	depends on COMMON_CLK
+	depends on OF
 	select GENERIC_PHY
 	help
 	  Support HDMI PHY for Mediatek SoCs.
-- 
2.27.0