Re: [RFC 25/32] watchdog: Kconfig: add HAS_IOPORT dependencies

Guenter Roeck
2021-12-27T18:03:20Z

On 12/27/21 8:43 AM, Niklas Schnelle wrote:
> In a future patch HAS_IOPORT=n will result in inb()/outb() and friends
> not being declared. We thus need to add HAS_IOPORT as dependency for
> those drivers using them.
>

How is the need for HAS_IOPORT determined, when exactly is it needed,
and when not ?

$ git grep -E "inb|inw" drivers/watchdog/ | cut -f1 -d: | sort -u
drivers/watchdog/acquirewdt.c
drivers/watchdog/advantechwdt.c
drivers/watchdog/cpu5wdt.c
drivers/watchdog/f71808e_wdt.c
drivers/watchdog/ibmasr.c
drivers/watchdog/ie6xx_wdt.c
drivers/watchdog/it8712f_wdt.c
drivers/watchdog/it87_wdt.c
drivers/watchdog/iTCO_vendor_support.c
drivers/watchdog/iTCO_wdt.c
drivers/watchdog/Kconfig
drivers/watchdog/machzwd.c
drivers/watchdog/mixcomwd.c
drivers/watchdog/ni903x_wdt.c
drivers/watchdog/nic7018_wdt.c
drivers/watchdog/nv_tco.c
drivers/watchdog/pc87413_wdt.c
drivers/watchdog/pcwd.c
drivers/watchdog/pcwd_pci.c
drivers/watchdog/sbc60xxwdt.c
drivers/watchdog/sbc7240_wdt.c
drivers/watchdog/sc1200wdt.c
drivers/watchdog/sch311x_wdt.c
drivers/watchdog/smsc37b787_wdt.c
drivers/watchdog/sp5100_tco.c
drivers/watchdog/w83627hf_wdt.c
drivers/watchdog/w83877f_wdt.c
drivers/watchdog/w83977f_wdt.c
drivers/watchdog/wafer5823wdt.c
drivers/watchdog/wdt977.c
drivers/watchdog/wdt.c
drivers/watchdog/wdt_pci.c

Guenter

> Co-developed-by: Arnd Bergmann <arnd@kernel.org>
> Signed-off-by: Arnd Bergmann <arnd@kernel.org>
> Signed-off-by: Niklas Schnelle <schnelle@linux.ibm.com>
> ---
> drivers/watchdog/Kconfig | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig
> index 05258109bcc2..2e87a65bdc8b 100644
> --- a/drivers/watchdog/Kconfig
> +++ b/drivers/watchdog/Kconfig
> @@ -452,6 +452,7 @@ config 21285_WATCHDOG
> config 977_WATCHDOG
> tristate "NetWinder WB83C977 watchdog"
> depends on (FOOTBRIDGE && ARCH_NETWINDER) || (ARM && COMPILE_TEST)
> + depends on HAS_IOPORT
> help
> Say Y here to include support for the WB977 watchdog included in
> NetWinder machines. Alternatively say M to compile the driver as
> @@ -1200,6 +1201,7 @@ config ITCO_WDT
> select WATCHDOG_CORE
> depends on I2C || I2C=n
> depends on MFD_INTEL_PMC_BXT || !MFD_INTEL_PMC_BXT
> + depends on HAS_IOPORT # for I2C_I801
> select LPC_ICH if !EXPERT
> select I2C_I801 if !EXPERT && I2C
> help
>