watchdog: iTCO: fix link error

When the MFD driver is a loadable module, the watchdog driver fails
to get linked into the kernel:

drivers/watchdog/iTCO_wdt.o: In function `update_no_reboot_bit_pmc':
iTCO_wdt.c:(.text+0x54f): undefined reference to `intel_pmc_gcr_update'

The code is written to support operation without the MFD driver, so
add a Kconfig dependency that allows this, while disallowing the watchdog
to be built-in when the MFD driver is a module.

Fixes: a62f1bb179c5 ("platform/x86: intel_pmc_ipc: Convert to MFD")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Guenter Roeck <linux@roeck-us.net>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig
index 0663c604bd642c454e24a2988b8a12cdf4c347a6..b739c476955b313a0167d3f057bd306412207955 100644 (file)
--- a/drivers/watchdog/Kconfig
+++ b/drivers/watchdog/Kconfig
@@ -1217,6 +1217,7 @@ config ITCO_WDT
        depends on (X86 || IA64) && PCI
        select WATCHDOG_CORE
        depends on I2C || I2C=n
+       depends on MFD_INTEL_PMC_BXT || !MFD_INTEL_PMC_BXT
        select LPC_ICH if !EXPERT
        select I2C_I801 if !EXPERT && I2C
        ---help---