mfd: ioc3: Add driver for SGI IOC3 chip

SGI IOC3 chip has integrated ethernet, keyboard and mouse interface.
It also supports connecting a SuperIO chip for serial and parallel
interfaces. IOC3 is used inside various SGI systemboards and add-on
cards with different equipped external interfaces.

Support for ethernet and serial interfaces were implemented inside
the network driver. This patchset moves out the not network related
parts to a new MFD driver, which takes care of card detection,
setup of platform devices and interrupt distribution for the subdevices.

Serial portion: Acked-by: Greg Kroah-Hartman <[email protected]>
Acked-for-MFD-by: Lee Jones <[email protected]>
Network part: Reviewed-by: Jakub Kicinski <[email protected]>
Network part: Acked-by: Jakub Kicinski <[email protected]>

Signed-off-by: Thomas Bogendoerfer <[email protected]>
Signed-off-by: Paul Burton <[email protected]>
Cc: James Hogan <[email protected]>
Cc: David S. Miller <[email protected]>
Cc: Jiri Slaby <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]

arch/mips/sgi-ip27/ip27-timer.c

@@ -168,23 +168,3 @@ void hub_rtc_init(nasid_t nasid)
 		LOCAL_HUB_S(PI_RT_PEND_B, 0);
 	}
 }
-
-static int __init sgi_ip27_rtc_devinit(void)
-{
-	struct resource res;
-
-	memset(&res, 0, sizeof(res));
-	res.start = XPHYSADDR(KL_CONFIG_CH_CONS_INFO(master_nasid)->memory_base +
-			      IOC3_BYTEBUS_DEV0);
-	res.end = res.start + 32767;
-	res.flags = IORESOURCE_MEM;
-
-	return IS_ERR(platform_device_register_simple("rtc-m48t35", -1,
-						      &res, 1));
-}
-
-/*
- * kludge make this a device_initcall after ioc3 resource conflicts
- * are resolved
- */
-late_initcall(sgi_ip27_rtc_devinit);

drivers/mfd/Kconfig

@@ -2004,5 +2004,18 @@ config RAVE_SP_CORE
 	  Select this to get support for the Supervisory Processor
 	  device found on several devices in RAVE line of hardware.
 
+config SGI_MFD_IOC3
+	tristate "SGI IOC3 core driver"
+	depends on PCI && MIPS && 64BIT
+	select MFD_CORE
+	help
+	  This option enables basic support for the SGI IOC3-based
+	  controller cards.  This option does not enable any specific
+	  functions on such a card, but provides necessary infrastructure
+	  for other drivers to utilize.
+
+	  If you have an SGI Origin, Octane, or a PCI IOC3 card,
+	  then say Y. Otherwise say N.
+
 endmenu
 endif

drivers/mfd/Makefile

@@ -255,3 +255,4 @@ obj-$(CONFIG_MFD_ROHM_BD70528)	+= rohm-bd70528.o
 obj-$(CONFIG_MFD_ROHM_BD718XX)	+= rohm-bd718x7.o
 obj-$(CONFIG_MFD_STMFX) 	+= stmfx.o
 
+obj-$(CONFIG_SGI_MFD_IOC3)	+= ioc3.o