| Message ID | 20230314121216.413434-10-schnelle@linux.ibm.com (mailing list archive) |
|---|---|
| State | Handled Elsewhere |
| Headers | show |
| Series | Kconfig: Introduce HAS_IOPORT config option | expand |
Hi Niklas, thanks for your patch! On Tue, Mar 14, 2023 at 1:12 PM Niklas Schnelle <schnelle@linux.ibm.com> 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. > > Co-developed-by: Arnd Bergmann <arnd@kernel.org> > Signed-off-by: Niklas Schnelle <schnelle@linux.ibm.com> > --- > drivers/gpio/Kconfig | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig > index 13be729710f2..5a874e67fc13 100644 > --- a/drivers/gpio/Kconfig > +++ b/drivers/gpio/Kconfig > @@ -688,7 +688,7 @@ config GPIO_VISCONTI > > config GPIO_VX855 > tristate "VIA VX855/VX875 GPIO" > - depends on (X86 || COMPILE_TEST) && PCI > + depends on (X86 || COMPILE_TEST) && PCI && HAS_IOPORT But is this the right fix? Further down in the Kconfig we have: menu "Port-mapped I/O GPIO drivers" depends on X86 # Unconditional I/O space access config GPIO_I8255 tristate select GPIO_REGMAP (...) Isn't the right fix to: 1) Move this Kconfig entry (VX855) down under the Port-mapped /O drivers, and then: 2) Make the whole submenu for port-mapped IO drivers depend on X86 && HAS_IOPORT Yours, Linus Walleij
On Wed, 2023-03-15 at 09:42 +0100, Linus Walleij wrote: > Hi Niklas, > > thanks for your patch! > > On Tue, Mar 14, 2023 at 1:12 PM Niklas Schnelle <schnelle@linux.ibm.com> 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. > > > > Co-developed-by: Arnd Bergmann <arnd@kernel.org> > > Signed-off-by: Niklas Schnelle <schnelle@linux.ibm.com> > > --- > > drivers/gpio/Kconfig | 2 +- > > 1 file changed, 1 insertion(+), 1 deletion(-) > > > > diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig > > index 13be729710f2..5a874e67fc13 100644 > > --- a/drivers/gpio/Kconfig > > +++ b/drivers/gpio/Kconfig > > @@ -688,7 +688,7 @@ config GPIO_VISCONTI > > > > config GPIO_VX855 > > tristate "VIA VX855/VX875 GPIO" > > - depends on (X86 || COMPILE_TEST) && PCI > > + depends on (X86 || COMPILE_TEST) && PCI && HAS_IOPORT > > But is this the right fix? Further down in the Kconfig we have: > > menu "Port-mapped I/O GPIO drivers" > depends on X86 # Unconditional I/O space access > > config GPIO_I8255 > tristate > select GPIO_REGMAP > > (...) > > Isn't the right fix to: > > 1) Move this Kconfig entry (VX855) down under the Port-mapped /O drivers, > and then: > > 2) Make the whole submenu for port-mapped IO drivers depend on > X86 && HAS_IOPORT > > Yours, > Linus Walleij Makes sense I changed it to the above approach for v4. One thing this makes me wonder is if then one should change the X86 dependency to at least X86 || COMPILE_TEST or even remove it and rely on HAS_IOPORT. The comment there at least suggests that it is there only for the I/O space access. Thanks, Niklas
On Fri, Apr 28, 2023 at 4:45 PM Niklas Schnelle <schnelle@linux.ibm.com> wrote: > Makes sense I changed it to the above approach for v4. One thing this > makes me wonder is if then one should change the X86 dependency to at > least X86 || COMPILE_TEST or even remove it and rely on HAS_IOPORT. Hm it makes sense I think. I don't know if there may be other X86 deps in these drivers but we don't know until we tried. Yours, Linus Walleij
diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig index 13be729710f2..5a874e67fc13 100644 --- a/drivers/gpio/Kconfig +++ b/drivers/gpio/Kconfig @@ -688,7 +688,7 @@ config GPIO_VISCONTI config GPIO_VX855 tristate "VIA VX855/VX875 GPIO" - depends on (X86 || COMPILE_TEST) && PCI + depends on (X86 || COMPILE_TEST) && PCI && HAS_IOPORT select MFD_CORE select MFD_VX855 help
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. Co-developed-by: Arnd Bergmann <arnd@kernel.org> Signed-off-by: Niklas Schnelle <schnelle@linux.ibm.com> --- drivers/gpio/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)