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[RFC,07/32] Input: gameport: add ISA and HAS_IOPORT dependencies

Message ID 20211227164317.4146918-8-schnelle@linux.ibm.com (mailing list archive)
State Not Applicable
Delegated to: Bjorn Helgaas
Headers show
Series Kconfig: Introduce HAS_IOPORT and LEGACY_PCI options | expand

Commit Message

Niklas Schnelle Dec. 27, 2021, 4:42 p.m. UTC 
In a future patch HAS_IOPORT=n will result in inb()/outb() and friends
not being declared. As ISA already implies HAS_IOPORT we can simply add
this dependency and guard sections of code using inb()/outb() as
alternative access methods.

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/input/gameport/Kconfig | 2 ++
 include/linux/gameport.h       | 9 +++++++--
 2 files changed, 9 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/drivers/input/gameport/Kconfig b/drivers/input/gameport/Kconfig
index 082280f95333..366a2723e9a0 100644
--- a/drivers/input/gameport/Kconfig
+++ b/drivers/input/gameport/Kconfig
@@ -25,6 +25,7 @@  if GAMEPORT
 
 config GAMEPORT_NS558
 	tristate "Classic ISA and PnP gameport support"
+	depends on ISA
 	help
 	  Say Y here if you have an ISA or PnP gameport.
 
@@ -35,6 +36,7 @@  config GAMEPORT_NS558
 
 config GAMEPORT_L4
 	tristate "PDPI Lightning 4 gamecard support"
+	depends on ISA
 	help
 	  Say Y here if you have a PDPI Lightning 4 gamecard.
 
diff --git a/include/linux/gameport.h b/include/linux/gameport.h
index 69081d899492..9e55ac748a86 100644
--- a/include/linux/gameport.h
+++ b/include/linux/gameport.h
@@ -167,16 +167,21 @@  static inline void gameport_trigger(struct gameport *gameport)
 {
 	if (gameport->trigger)
 		gameport->trigger(gameport);
+#ifdef CONFIG_HAS_IOPORT
 	else
 		outb(0xff, gameport->io);
+#endif
 }
 
 static inline unsigned char gameport_read(struct gameport *gameport)
 {
 	if (gameport->read)
 		return gameport->read(gameport);
-	else
-		return inb(gameport->io);
+#ifdef CONFIG_HAS_IOPORT
+	return inb(gameport->io);
+#else
+	return 0xff;
+#endif
 }
 
 static inline int gameport_cooked_read(struct gameport *gameport, int *axes, int *buttons)