watchdog: iTCO: Drop vendor support

iTCO vendor support was introduced in 2006 to support SuperMicro boards
with Pentium 3 CPUs. It was extended in 2009 to support motherbords
with broken BIOS (specifically Intel DG33TL). The code is long since
obsolete, so let's drop support for it.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Reviewed-by: Wim Van Sebroeck <wim@linux-watchdog.org>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>

Author: groeck

Documentation/watchdog/watchdog-parameters.rst

@@ -209,13 +209,6 @@ iTCO_wdt:
 
 -------------------------------------------------
 
-iTCO_vendor_support:
-    vendorsupport:
-	iTCO vendor specific support mode, default=0 (none),
-	1=SuperMicro Pent3, 2=SuperMicro Pent4+, 911=Broken SMI BIOS
-
--------------------------------------------------
-
 ib700wdt:
     timeout:
 	Watchdog timeout in seconds. 0<= timeout <=30, default=30.

drivers/watchdog/Kconfig

@@ -1429,14 +1429,6 @@ config ITCO_WDT
 	  To compile this driver as a module, choose M here: the
 	  module will be called iTCO_wdt.
 
-config ITCO_VENDOR_SUPPORT
-	bool "Intel TCO Timer/Watchdog Specific Vendor Support"
-	depends on ITCO_WDT
-	help
-	  Add vendor specific support to the intel TCO timer based watchdog
-	  devices. At this moment we only have additional support for some
-	  SuperMicro Inc. motherboards.
-
 config IT8712F_WDT
 	tristate "IT8712F (Smart Guardian) Watchdog Timer"
 	depends on (X86 || COMPILE_TEST) && HAS_IOPORT

drivers/watchdog/Makefile

@@ -127,9 +127,6 @@ obj-$(CONFIG_IE6XX_WDT) += ie6xx_wdt.o
 obj-$(CONFIG_ITCO_WDT) += iTCO_wdt.o
 obj-$(CONFIG_LENOVO_SE10_WDT) += lenovo_se10_wdt.o
 obj-$(CONFIG_LENOVO_SE30_WDT) += lenovo_se30_wdt.o
-ifeq ($(CONFIG_ITCO_VENDOR_SUPPORT),y)
-obj-$(CONFIG_ITCO_WDT) += iTCO_vendor_support.o
-endif
 obj-$(CONFIG_IT8712F_WDT) += it8712f_wdt.o
 obj-$(CONFIG_IT87_WDT) += it87_wdt.o
 obj-$(CONFIG_HP_WATCHDOG) += hpwdt.o

drivers/watchdog/iTCO_vendor.h

@@ -63,8 +63,6 @@
 #include <linux/platform_data/itco_wdt.h>
 #include <linux/mfd/intel_pmc_bxt.h>
 
-#include "iTCO_vendor.h"
-
 /* Address definitions for the TCO */
 /* TCO base address */
 #define TCOBASE(p)	((p)->tco_res->start)
@@ -283,8 +281,6 @@ static int iTCO_wdt_start(struct watchdog_device *wd_dev)
 	struct iTCO_wdt_private *p = watchdog_get_drvdata(wd_dev);
 	unsigned int val;
 
-	iTCO_vendor_pre_start(p->smi_res, wd_dev->timeout);
-
 	/* disable chipset's NO_REBOOT bit */
 	if (p->update_no_reboot_bit(p->no_reboot_priv, false)) {
 		dev_err(wd_dev->parent, "failed to reset NO_REBOOT flag, reboot disabled by hardware/BIOS\n");
@@ -314,8 +310,6 @@ static int iTCO_wdt_stop(struct watchdog_device *wd_dev)
 	struct iTCO_wdt_private *p = watchdog_get_drvdata(wd_dev);
 	unsigned int val;
 
-	iTCO_vendor_pre_stop(p->smi_res);
-
 	/* Bit 11: TCO Timer Halt -> 1 = The TCO timer is disabled */
 	val = inw(TCO1_CNT(p));
 	val |= 0x0800;
@@ -488,8 +482,7 @@ static int iTCO_wdt_probe(struct platform_device *pdev)
 			       (u64)SMI_EN(p));
 			return -EBUSY;
 		}
-	} else if (iTCO_vendorsupport ||
-		   turn_SMI_watchdog_clear_off >= p->iTCO_version) {
+	} else if (turn_SMI_watchdog_clear_off >= p->iTCO_version) {
 		dev_err(dev, "SMI I/O resource is missing\n");
 		return -ENODEV;
 	}
@@ -508,8 +501,7 @@ static int iTCO_wdt_probe(struct platform_device *pdev)
 	}
 
 	/* Check chipset's NO_REBOOT bit */
-	if (p->update_no_reboot_bit(p->no_reboot_priv, false) &&
-	    iTCO_vendor_check_noreboot_on()) {
+	if (p->update_no_reboot_bit(p->no_reboot_priv, false)) {
 		dev_info(dev, "unable to reset NO_REBOOT flag, device disabled by hardware/BIOS\n");
 		return -ENODEV;	/* Cannot reset NO_REBOOT bit */
 	}