linux-kernel - [PATCH] watchdog: simatic: add PCI dependency

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Date:   Mon, 14 Aug 2023 09:38:50 +0200
From:   Arnd Bergmann <arnd@...nel.org>
To:     Wim Van Sebroeck <wim@...ux-watchdog.org>,
        Guenter Roeck <linux@...ck-us.net>,
        Hans de Goede <hdegoede@...hat.com>,
        Henning Schild <henning.schild@...mens.com>
Cc:     "xingtong . wu" <xingtong_wu@....com>,
        Arnd Bergmann <arnd@...db.de>, linux-watchdog@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] watchdog: simatic: add PCI dependency

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

The simatic-ipc driver no longer depends on PCI, but its watchdog portion
still needs it, otherwise P2SB runs into a build  failure:

WARNING: unmet direct dependencies detected for P2SB
  Depends on [n]: PCI [=n] && X86 [=y]
  Selected by [m]:
  - SIEMENS_SIMATIC_IPC_WDT [=m] && WATCHDOG [=y] && SIEMENS_SIMATIC_IPC [=y]

drivers/platform/x86/p2sb.c:121:3: error: call to undeclared function 'pci_bus_write_config_dword'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
                pci_bus_write_config_dword(bus, devfn_p2sb, P2SBC, 0);

Add back the minimum dependendency to make it build in random configurations
again.

Fixes: b72da71ce24b0 ("platform/x86: simatic-ipc: drop PCI runtime depends and header")
Signed-off-by: Arnd Bergmann <arnd@...db.de>
---
 drivers/watchdog/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig
index 04e9b40cf7d53..09452384221a4 100644
--- a/drivers/watchdog/Kconfig
+++ b/drivers/watchdog/Kconfig
@@ -1680,7 +1680,7 @@ config NIC7018_WDT
 
 config SIEMENS_SIMATIC_IPC_WDT
 	tristate "Siemens Simatic IPC Watchdog"
-	depends on SIEMENS_SIMATIC_IPC
+	depends on SIEMENS_SIMATIC_IPC && PCI
 	default y
 	select WATCHDOG_CORE
 	select P2SB
-- 
2.39.2