Merge branch 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus

* 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus:
  MIPS: Kill unused <asm/debug.h> inclusions
  MIPS: IP32: Add platform device for CMOS RTC; remove dead code
  RTC: M48T35: new RTC driver
  MIPS: IP27: Switch over to RTC class driver
  MIPS: DS1286: New RTC driver
  MIPS: IP22/28: Switch over to RTC class driver
  MIPS: PCI: Scan busses when they are registered
  MIPS: WGT634U: Add reset button support
  MIPS: BCM47xx: Use the new SSB GPIO API
  MIPS: BCM47xx: Remove references to BCM947XX
  MIPS: WGT634U: Add machine detection message
  MIPS: Align .data.cacheline_aligned based on CONFIG_MIPS_L1_CACHE_SHIFT
  MIPS: show_cpuinfo prints the type of the calling CPU
  MIPS: Fix wrong branch target in new spin_lock code.
  MIPS: Have a heart for a lonely, lost header file ...

arch/mips/Kconfig

@@ -52,6 +52,7 @@ config BCM47XX
 	select SSB
 	select SSB_DRIVER_MIPS
 	select SSB_DRIVER_EXTIF
+	select SSB_EMBEDDED
 	select SSB_PCICORE_HOSTMODE if PCI
 	select GENERIC_GPIO
 	select SYS_HAS_EARLY_PRINTK

arch/mips/bcm47xx/gpio.c

@@ -12,68 +12,51 @@
 #include <asm/mach-bcm47xx/bcm47xx.h>
 #include <asm/mach-bcm47xx/gpio.h>
 
-int bcm47xx_gpio_to_irq(unsigned gpio)
+#if (BCM47XX_CHIPCO_GPIO_LINES > BCM47XX_EXTIF_GPIO_LINES)
+static DECLARE_BITMAP(gpio_in_use, BCM47XX_CHIPCO_GPIO_LINES);
+#else
+static DECLARE_BITMAP(gpio_in_use, BCM47XX_EXTIF_GPIO_LINES);
+#endif
+
+int gpio_request(unsigned gpio, const char *tag)
 {
-	if (ssb_bcm47xx.chipco.dev)
-		return ssb_mips_irq(ssb_bcm47xx.chipco.dev) + 2;
-	else if (ssb_bcm47xx.extif.dev)
-		return ssb_mips_irq(ssb_bcm47xx.extif.dev) + 2;
-	else
+	if (ssb_chipco_available(&ssb_bcm47xx.chipco) &&
+	    ((unsigned)gpio >= BCM47XX_CHIPCO_GPIO_LINES))
 		return -EINVAL;
-}
-EXPORT_SYMBOL_GPL(bcm47xx_gpio_to_irq);
 
-int bcm47xx_gpio_get_value(unsigned gpio)
-{
-	if (ssb_bcm47xx.chipco.dev)
-		return ssb_chipco_gpio_in(&ssb_bcm47xx.chipco, 1 << gpio);
-	else if (ssb_bcm47xx.extif.dev)
-		return ssb_extif_gpio_in(&ssb_bcm47xx.extif, 1 << gpio);
-	else
-		return 0;
-}
-EXPORT_SYMBOL_GPL(bcm47xx_gpio_get_value);
+	if (ssb_extif_available(&ssb_bcm47xx.extif) &&
+	    ((unsigned)gpio >= BCM47XX_EXTIF_GPIO_LINES))
+		return -EINVAL;
 
-void bcm47xx_gpio_set_value(unsigned gpio, int value)
-{
-	if (ssb_bcm47xx.chipco.dev)
-		ssb_chipco_gpio_out(&ssb_bcm47xx.chipco,
-				    1 << gpio,
-				    value ? 1 << gpio : 0);
-	else if (ssb_bcm47xx.extif.dev)
-		ssb_extif_gpio_out(&ssb_bcm47xx.extif,
-				   1 << gpio,
-				   value ? 1 << gpio : 0);
-}
-EXPORT_SYMBOL_GPL(bcm47xx_gpio_set_value);
+	if (test_and_set_bit(gpio, gpio_in_use))
+		return -EBUSY;
 
-int bcm47xx_gpio_direction_input(unsigned gpio)
-{
-	if (ssb_bcm47xx.chipco.dev && (gpio < BCM47XX_CHIPCO_GPIO_LINES))
-		ssb_chipco_gpio_outen(&ssb_bcm47xx.chipco,
-				      1 << gpio, 0);
-	else if (ssb_bcm47xx.extif.dev && (gpio < BCM47XX_EXTIF_GPIO_LINES))
-		ssb_extif_gpio_outen(&ssb_bcm47xx.extif,
-				     1 << gpio, 0);
-	else
-		return -EINVAL;
 	return 0;
 }
-EXPORT_SYMBOL_GPL(bcm47xx_gpio_direction_input);
+EXPORT_SYMBOL(gpio_request);
 
-int bcm47xx_gpio_direction_output(unsigned gpio, int value)
+void gpio_free(unsigned gpio)
 {
-	bcm47xx_gpio_set_value(gpio, value);
+	if (ssb_chipco_available(&ssb_bcm47xx.chipco) &&
+	    ((unsigned)gpio >= BCM47XX_CHIPCO_GPIO_LINES))
+		return;
+
+	if (ssb_extif_available(&ssb_bcm47xx.extif) &&
+	    ((unsigned)gpio >= BCM47XX_EXTIF_GPIO_LINES))
+		return;
+
+	clear_bit(gpio, gpio_in_use);
+}
+EXPORT_SYMBOL(gpio_free);
 
-	if (ssb_bcm47xx.chipco.dev && (gpio < BCM47XX_CHIPCO_GPIO_LINES))
-		ssb_chipco_gpio_outen(&ssb_bcm47xx.chipco,
-				      1 << gpio, 1 << gpio);
-	else if (ssb_bcm47xx.extif.dev && (gpio < BCM47XX_EXTIF_GPIO_LINES))
-		ssb_extif_gpio_outen(&ssb_bcm47xx.extif,
-				     1 << gpio, 1 << gpio);
+int gpio_to_irq(unsigned gpio)
+{
+	if (ssb_chipco_available(&ssb_bcm47xx.chipco))
+		return ssb_mips_irq(ssb_bcm47xx.chipco.dev) + 2;
+	else if (ssb_extif_available(&ssb_bcm47xx.extif))
+		return ssb_mips_irq(ssb_bcm47xx.extif.dev) + 2;
 	else
 		return -EINVAL;
-	return 0;
 }
-EXPORT_SYMBOL_GPL(bcm47xx_gpio_direction_output);
+EXPORT_SYMBOL_GPL(gpio_to_irq);
 

arch/mips/bcm47xx/setup.c

@@ -27,6 +27,7 @@
 
 #include <linux/types.h>
 #include <linux/ssb/ssb.h>
+#include <linux/ssb/ssb_embedded.h>
 #include <asm/bootinfo.h>
 #include <asm/reboot.h>
 #include <asm/time.h>
@@ -41,7 +42,7 @@ static void bcm47xx_machine_restart(char *command)
 	printk(KERN_ALERT "Please stand by while rebooting the system...\n");
 	local_irq_disable();
 	/* Set the watchdog timer to reset immediately */
-	ssb_chipco_watchdog_timer_set(&ssb_bcm47xx.chipco, 1);
+	ssb_watchdog_timer_set(&ssb_bcm47xx, 1);
 	while (1)
 		cpu_relax();
 }
@@ -50,7 +51,7 @@ static void bcm47xx_machine_halt(void)
 {
 	/* Disable interrupts and watchdog and spin forever */
 	local_irq_disable();
-	ssb_chipco_watchdog_timer_set(&ssb_bcm47xx.chipco, 0);
+	ssb_watchdog_timer_set(&ssb_bcm47xx, 0);
 	while (1)
 		cpu_relax();
 }

arch/mips/bcm47xx/wgt634u.c

@@ -11,6 +11,9 @@
 #include <linux/leds.h>
 #include <linux/mtd/physmap.h>
 #include <linux/ssb/ssb.h>
+#include <linux/interrupt.h>
+#include <linux/reboot.h>
+#include <linux/gpio.h>
 #include <asm/mach-bcm47xx/bcm47xx.h>
 
 /* GPIO definitions for the WGT634U */
@@ -99,6 +102,30 @@ static struct platform_device *wgt634u_devices[] __initdata = {
 	&wgt634u_gpio_leds,
 };
 
+static irqreturn_t gpio_interrupt(int irq, void *ignored)
+{
+	int state;
+
+	/* Interrupts are shared, check if the current one is
+	   a GPIO interrupt. */
+	if (!ssb_chipco_irq_status(&ssb_bcm47xx.chipco,
+				   SSB_CHIPCO_IRQ_GPIO))
+		return IRQ_NONE;
+
+	state = gpio_get_value(WGT634U_GPIO_RESET);
+
+	/* Interrupt are level triggered, revert the interrupt polarity
+	   to clear the interrupt. */
+	gpio_polarity(WGT634U_GPIO_RESET, state);
+
+	if (!state) {
+		printk(KERN_INFO "Reset button pressed");
+		ctrl_alt_del();
+	}
+
+	return IRQ_HANDLED;
+}
+
 static int __init wgt634u_init(void)
 {
 	/* There is no easy way to detect that we are running on a WGT634U
@@ -112,6 +139,19 @@ static int __init wgt634u_init(void)
 	    ((et0mac[1] == 0x09 && et0mac[2] == 0x5b) ||
 	     (et0mac[1] == 0x0f && et0mac[2] == 0xb5))) {
 		struct ssb_mipscore *mcore = &ssb_bcm47xx.mipscore;
+
+		printk(KERN_INFO "WGT634U machine detected.\n");
+
+		if (!request_irq(gpio_to_irq(WGT634U_GPIO_RESET),
+				 gpio_interrupt, IRQF_SHARED,
+				 "WGT634U GPIO", &ssb_bcm47xx.chipco)) {
+			gpio_direction_input(WGT634U_GPIO_RESET);
+			gpio_intmask(WGT634U_GPIO_RESET, 1);
+			ssb_chipco_irq_mask(&ssb_bcm47xx.chipco,
+					    SSB_CHIPCO_IRQ_GPIO,
+					    SSB_CHIPCO_IRQ_GPIO);
+		}
+
 		wgt634u_flash_data.width = mcore->flash_buswidth;
 		wgt634u_flash_resource.start = mcore->flash_window;
 		wgt634u_flash_resource.end = mcore->flash_window

arch/mips/emma2rh/common/irq.c

@@ -29,7 +29,6 @@
 
 #include <asm/system.h>
 #include <asm/mipsregs.h>
-#include <asm/debug.h>
 #include <asm/addrspace.h>
 #include <asm/bootinfo.h>
 

arch/mips/emma2rh/common/prom.c

@@ -30,7 +30,6 @@
 #include <asm/addrspace.h>
 #include <asm/bootinfo.h>
 #include <asm/emma2rh/emma2rh.h>
-#include <asm/debug.h>
 
 const char *get_system_type(void)
 {

arch/mips/emma2rh/markeins/platform.c

@@ -35,7 +35,6 @@
 #include <asm/irq.h>
 #include <asm/reboot.h>
 #include <asm/traps.h>
-#include <asm/debug.h>
 
 #include <asm/emma2rh/emma2rh.h>
 

arch/mips/include/asm/mach-bcm47xx/gpio.h

@@ -9,47 +9,46 @@
 #ifndef __BCM47XX_GPIO_H
 #define __BCM47XX_GPIO_H
 
+#include <linux/ssb/ssb_embedded.h>
+#include <asm/mach-bcm47xx/bcm47xx.h>
+
 #define BCM47XX_EXTIF_GPIO_LINES	5
 #define BCM47XX_CHIPCO_GPIO_LINES	16
 
-extern int bcm47xx_gpio_to_irq(unsigned gpio);
-extern int bcm47xx_gpio_get_value(unsigned gpio);
-extern void bcm47xx_gpio_set_value(unsigned gpio, int value);
-extern int bcm47xx_gpio_direction_input(unsigned gpio);
-extern int bcm47xx_gpio_direction_output(unsigned gpio, int value);
-
-static inline int gpio_request(unsigned gpio, const char *label)
-{
-       return 0;
-}
+extern int gpio_request(unsigned gpio, const char *label);
+extern void gpio_free(unsigned gpio);
+extern int gpio_to_irq(unsigned gpio);
 
-static inline void gpio_free(unsigned gpio)
+static inline int gpio_get_value(unsigned gpio)
 {
+	return ssb_gpio_in(&ssb_bcm47xx, 1 << gpio);
 }
 
-static inline int gpio_to_irq(unsigned gpio)
+static inline void gpio_set_value(unsigned gpio, int value)
 {
-	return bcm47xx_gpio_to_irq(gpio);
+	ssb_gpio_out(&ssb_bcm47xx, 1 << gpio, value ? 1 << gpio : 0);
 }
 
-static inline int gpio_get_value(unsigned gpio)
+static inline int gpio_direction_input(unsigned gpio)
 {
-	return bcm47xx_gpio_get_value(gpio);
+	return ssb_gpio_outen(&ssb_bcm47xx, 1 << gpio, 0);
 }
 
-static inline void gpio_set_value(unsigned gpio, int value)
+static inline int gpio_direction_output(unsigned gpio, int value)
 {
-	bcm47xx_gpio_set_value(gpio, value);
+	return ssb_gpio_outen(&ssb_bcm47xx, 1 << gpio, 1 << gpio);
 }
 
-static inline int gpio_direction_input(unsigned gpio)
+static int gpio_intmask(unsigned gpio, int value)
 {
-	return bcm47xx_gpio_direction_input(gpio);
+	return ssb_gpio_intmask(&ssb_bcm47xx, 1 << gpio,
+				value ? 1 << gpio : 0);
 }
 
-static inline int gpio_direction_output(unsigned gpio, int value)
+static int gpio_polarity(unsigned gpio, int value)
 {
-	return bcm47xx_gpio_direction_output(gpio, value);
+	return ssb_gpio_polarity(&ssb_bcm47xx, 1 << gpio,
+				 value ? 1 << gpio : 0);
 }
 
 

arch/mips/include/asm/mach-bcm47xx/war.h

@@ -5,8 +5,8 @@
  *
  * Copyright (C) 2002, 2004, 2007 by Ralf Baechle <ralf@linux-mips.org>
  */
-#ifndef __ASM_MIPS_MACH_BCM947XX_WAR_H
-#define __ASM_MIPS_MACH_BCM947XX_WAR_H
+#ifndef __ASM_MIPS_MACH_BCM47XX_WAR_H
+#define __ASM_MIPS_MACH_BCM47XX_WAR_H
 
 #define R4600_V1_INDEX_ICACHEOP_WAR	0
 #define R4600_V1_HIT_CACHEOP_WAR	0
@@ -22,4 +22,4 @@
 #define R10000_LLSC_WAR			0
 #define MIPS34K_MISSED_ITLB_WAR		0
 
-#endif /* __ASM_MIPS_MACH_BCM947XX_WAR_H */
+#endif /* __ASM_MIPS_MACH_BCM47XX_WAR_H */

arch/mips/include/asm/mach-ip22/ds1286.h

@@ -1,18 +0,0 @@
-/*
- * This file is subject to the terms and conditions of the GNU General Public
- * License.  See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * Copyright (C) 1998, 2001, 03 by Ralf Baechle
- *
- * RTC routines for PC style attached Dallas chip.
- */
-#ifndef __ASM_MACH_IP22_DS1286_H
-#define __ASM_MACH_IP22_DS1286_H
-
-#include <asm/sgi/hpc3.h>
-
-#define rtc_read(reg)		(hpc3c0->rtcregs[(reg)] & 0xff)
-#define rtc_write(data, reg)	do { hpc3c0->rtcregs[(reg)] = (data); } while(0)
-
-#endif /* __ASM_MACH_IP22_DS1286_H */

arch/mips/include/asm/mach-ip28/ds1286.h

@@ -1,4 +0,0 @@
-#ifndef __ASM_MACH_IP28_DS1286_H
-#define __ASM_MACH_IP28_DS1286_H
-#include <asm/mach-ip22/ds1286.h>
-#endif /* __ASM_MACH_IP28_DS1286_H */

arch/mips/include/asm/spinlock.h

@@ -147,7 +147,7 @@ static inline void __raw_spin_unlock(raw_spinlock_t *lock)
 		"	ori	%[ticket], %[ticket], 0x2000		\n"
 		"	xori	%[ticket], %[ticket], 0x2000		\n"
 		"	sc	%[ticket], %[ticket_ptr]		\n"
-		"	beqzl	%[ticket], 2f				\n"
+		"	beqzl	%[ticket], 1b				\n"
 		: [ticket_ptr] "+m" (lock->lock),
 		  [ticket] "=&r" (tmp));
 	} else {

arch/mips/kernel/proc.c

@@ -39,7 +39,7 @@ static int show_cpuinfo(struct seq_file *m, void *v)
 	seq_printf(m, "processor\t\t: %ld\n", n);
 	sprintf(fmt, "cpu model\t\t: %%s V%%d.%%d%s\n",
 	        cpu_data[n].options & MIPS_CPU_FPU ? "  FPU V%d.%d" : "");
-	seq_printf(m, fmt, __cpu_name[smp_processor_id()],
+	seq_printf(m, fmt, __cpu_name[n],
 	                           (version >> 4) & 0x0f, version & 0x0f,
 	                           (fp_vers >> 4) & 0x0f, fp_vers & 0x0f);
 	seq_printf(m, "BogoMIPS\t\t: %lu.%02lu\n",

arch/mips/kernel/vmlinux.lds.S

@@ -104,7 +104,7 @@ SECTIONS
 	. = ALIGN(_PAGE_SIZE);
 	__nosave_end = .;
 
-	. = ALIGN(32);
+	. = ALIGN(1 << CONFIG_MIPS_L1_CACHE_SHIFT);
 	.data.cacheline_aligned : {
 		*(.data.cacheline_aligned)
 	}

arch/mips/pci/fixup-emma2rh.c

@@ -29,7 +29,6 @@
 #include <linux/pci.h>
 
 #include <asm/bootinfo.h>
-#include <asm/debug.h>
 
 #include <asm/emma2rh/emma2rh.h>
 

arch/mips/pci/ops-pnx8550.c

@@ -29,8 +29,6 @@
 
 #include <asm/mach-pnx8550/pci.h>
 #include <asm/mach-pnx8550/glb.h>
-#include <asm/debug.h>
-
 
 static inline void clear_status(void)
 {

arch/mips/pci/pci-emma2rh.c

@@ -29,7 +29,6 @@
 #include <linux/pci.h>
 
 #include <asm/bootinfo.h>
-#include <asm/debug.h>
 
 #include <asm/emma2rh/emma2rh.h>
 

arch/mips/pci/pci.c

@@ -34,6 +34,8 @@ static struct pci_controller *hose_head, **hose_tail = &hose_head;
 unsigned long PCIBIOS_MIN_IO	= 0x0000;
 unsigned long PCIBIOS_MIN_MEM	= 0;
 
+static int pci_initialized;
+
 /*
  * We need to avoid collisions with `mirrored' VGA ports
  * and other strange ISA hardware, so we always want the
@@ -74,6 +76,42 @@ pcibios_align_resource(void *data, struct resource *res,
 	res->start = start;
 }
 
+static void __devinit pcibios_scanbus(struct pci_controller *hose)
+{
+	static int next_busno;
+	static int need_domain_info;
+	struct pci_bus *bus;
+
+	if (!hose->iommu)
+		PCI_DMA_BUS_IS_PHYS = 1;
+
+	if (hose->get_busno && pci_probe_only)
+		next_busno = (*hose->get_busno)();
+
+	bus = pci_scan_bus(next_busno, hose->pci_ops, hose);
+	hose->bus = bus;
+
+	need_domain_info = need_domain_info || hose->index;
+	hose->need_domain_info = need_domain_info;
+	if (bus) {
+		next_busno = bus->subordinate + 1;
+		/* Don't allow 8-bit bus number overflow inside the hose -
+		   reserve some space for bridges. */
+		if (next_busno > 224) {
+			next_busno = 0;
+			need_domain_info = 1;
+		}
+
+		if (!pci_probe_only) {
+			pci_bus_size_bridges(bus);
+			pci_bus_assign_resources(bus);
+			pci_enable_bridges(bus);
+		}
+	}
+}
+
+static DEFINE_MUTEX(pci_scan_mutex);
+
 void __devinit register_pci_controller(struct pci_controller *hose)
 {
 	if (request_resource(&iomem_resource, hose->mem_resource) < 0)
@@ -93,6 +131,17 @@ void __devinit register_pci_controller(struct pci_controller *hose)
 		printk(KERN_WARNING
 		       "registering PCI controller with io_map_base unset\n");
 	}
+
+	/*
+	 * Scan the bus if it is register after the PCI subsystem
+	 * initialization.
+	 */
+	if (pci_initialized) {
+		mutex_lock(&pci_scan_mutex);
+		pcibios_scanbus(hose);
+		mutex_unlock(&pci_scan_mutex);
+	}
+
 	return;
 
 out:
@@ -125,38 +174,15 @@ static u8 __init common_swizzle(struct pci_dev *dev, u8 *pinp)
 static int __init pcibios_init(void)
 {
 	struct pci_controller *hose;
-	struct pci_bus *bus;
-	int next_busno;
-	int need_domain_info = 0;
 
 	/* Scan all of the recorded PCI controllers.  */
-	for (next_busno = 0, hose = hose_head; hose; hose = hose->next) {
-
-		if (!hose->iommu)
-			PCI_DMA_BUS_IS_PHYS = 1;
-
-		if (hose->get_busno && pci_probe_only)
-			next_busno = (*hose->get_busno)();
-
-		bus = pci_scan_bus(next_busno, hose->pci_ops, hose);
-		hose->bus = bus;
-		need_domain_info = need_domain_info || hose->index;
-		hose->need_domain_info = need_domain_info;
-		if (bus) {
-			next_busno = bus->subordinate + 1;
-			/* Don't allow 8-bit bus number overflow inside the hose -
-			   reserve some space for bridges. */
-			if (next_busno > 224) {
-				next_busno = 0;
-				need_domain_info = 1;
-			}
-		}
-	}
+	for (hose = hose_head; hose; hose = hose->next)
+		pcibios_scanbus(hose);
 
-	if (!pci_probe_only)
-		pci_assign_unassigned_resources();
 	pci_fixup_irqs(common_swizzle, pcibios_map_irq);
 
+	pci_initialized = 1;
+
 	return 0;
 }
 

arch/mips/rb532/time.c

@@ -28,7 +28,6 @@
 #include <linux/timex.h>
 
 #include <asm/mipsregs.h>
-#include <asm/debug.h>
 #include <asm/time.h>
 #include <asm/mach-rc32434/rc32434.h>
 

arch/mips/sgi-ip22/ip22-platform.c

@@ -192,3 +192,18 @@ static int __init sgi_button_devinit(void)
 }
 
 device_initcall(sgi_button_devinit);
+
+static int __init sgi_ds1286_devinit(void)
+{
+	struct resource res;
+
+	memset(&res, 0, sizeof(res));
+	res.start = HPC3_CHIP0_BASE + offsetof(struct hpc3_regs, rtcregs);
+	res.end = res.start + sizeof(hpc3c0->rtcregs) - 1;
+	res.flags = IORESOURCE_MEM;
+
+	return IS_ERR(platform_device_register_simple("rtc-ds1286", -1,
+						      &res, 1));
+}
+
+device_initcall(sgi_ds1286_devinit);

arch/mips/sgi-ip22/ip22-setup.c

@@ -4,7 +4,6 @@
  * Copyright (C) 1996 David S. Miller (dm@engr.sgi.com)
  * Copyright (C) 1997, 1998 Ralf Baechle (ralf@gnu.org)
  */
-#include <linux/ds1286.h>
 #include <linux/init.h>
 #include <linux/kernel.h>
 #include <linux/kdev_t.h>

arch/mips/sgi-ip22/ip22-time.c

@@ -10,7 +10,6 @@
  * Copyright (C) 2003, 06 Ralf Baechle (ralf@linux-mips.org)
  */
 #include <linux/bcd.h>
-#include <linux/ds1286.h>
 #include <linux/init.h>
 #include <linux/irq.h>
 #include <linux/kernel.h>
@@ -29,69 +28,6 @@
 #include <asm/sgi/hpc3.h>
 #include <asm/sgi/ip22.h>
 
-/*
- * Note that mktime uses month from 1 to 12 while rtc_time_to_tm
- * uses 0 to 11.
- */
-unsigned long read_persistent_clock(void)
-{
-	unsigned int yrs, mon, day, hrs, min, sec;
-	unsigned int save_control;
-	unsigned long flags;
-
-	spin_lock_irqsave(&rtc_lock, flags);
-	save_control = hpc3c0->rtcregs[RTC_CMD] & 0xff;
-	hpc3c0->rtcregs[RTC_CMD] = save_control | RTC_TE;
-
-	sec = BCD2BIN(hpc3c0->rtcregs[RTC_SECONDS] & 0xff);
-	min = BCD2BIN(hpc3c0->rtcregs[RTC_MINUTES] & 0xff);
-	hrs = BCD2BIN(hpc3c0->rtcregs[RTC_HOURS] & 0x3f);
-	day = BCD2BIN(hpc3c0->rtcregs[RTC_DATE] & 0xff);
-	mon = BCD2BIN(hpc3c0->rtcregs[RTC_MONTH] & 0x1f);
-	yrs = BCD2BIN(hpc3c0->rtcregs[RTC_YEAR] & 0xff);
-
-	hpc3c0->rtcregs[RTC_CMD] = save_control;
-	spin_unlock_irqrestore(&rtc_lock, flags);
-
-	if (yrs < 45)
-		yrs += 30;
-	if ((yrs += 40) < 70)
-		yrs += 100;
-
-	return mktime(yrs + 1900, mon, day, hrs, min, sec);
-}
-
-int rtc_mips_set_time(unsigned long tim)
-{
-	struct rtc_time tm;
-	unsigned int save_control;
-	unsigned long flags;
-
-	rtc_time_to_tm(tim, &tm);
-
-	tm.tm_mon += 1;		/* tm_mon starts at zero */
-	tm.tm_year -= 40;
-	if (tm.tm_year >= 100)
-		tm.tm_year -= 100;
-
-	spin_lock_irqsave(&rtc_lock, flags);
-	save_control = hpc3c0->rtcregs[RTC_CMD] & 0xff;
-	hpc3c0->rtcregs[RTC_CMD] = save_control | RTC_TE;
-
-	hpc3c0->rtcregs[RTC_YEAR] = BIN2BCD(tm.tm_year);
-	hpc3c0->rtcregs[RTC_MONTH] = BIN2BCD(tm.tm_mon);
-	hpc3c0->rtcregs[RTC_DATE] = BIN2BCD(tm.tm_mday);
-	hpc3c0->rtcregs[RTC_HOURS] = BIN2BCD(tm.tm_hour);
-	hpc3c0->rtcregs[RTC_MINUTES] = BIN2BCD(tm.tm_min);
-	hpc3c0->rtcregs[RTC_SECONDS] = BIN2BCD(tm.tm_sec);
-	hpc3c0->rtcregs[RTC_HUNDREDTH_SECOND] = 0;
-
-	hpc3c0->rtcregs[RTC_CMD] = save_control;
-	spin_unlock_irqrestore(&rtc_lock, flags);
-
-	return 0;
-}
-
 static unsigned long dosample(void)
 {
 	u32 ct0, ct1;

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

@@ -13,12 +13,12 @@
 #include <linux/time.h>
 #include <linux/timex.h>
 #include <linux/mm.h>
+#include <linux/platform_device.h>
 
 #include <asm/time.h>
 #include <asm/pgtable.h>
 #include <asm/sgialib.h>
 #include <asm/sn/ioc3.h>
-#include <asm/m48t35.h>
 #include <asm/sn/klconfig.h>
 #include <asm/sn/arch.h>
 #include <asm/sn/addrs.h>
@@ -28,51 +28,6 @@
 
 #define TICK_SIZE (tick_nsec / 1000)
 
-#if 0
-static int set_rtc_mmss(unsigned long nowtime)
-{
-	int retval = 0;
-	int real_seconds, real_minutes, cmos_minutes;
-	struct m48t35_rtc *rtc;
-	nasid_t nid;
-
-	nid = get_nasid();
-	rtc = (struct m48t35_rtc *)(KL_CONFIG_CH_CONS_INFO(nid)->memory_base +
-							IOC3_BYTEBUS_DEV0);
-
-	rtc->control |= M48T35_RTC_READ;
-	cmos_minutes = BCD2BIN(rtc->min);
-	rtc->control &= ~M48T35_RTC_READ;
-
-	/*
-	 * Since we're only adjusting minutes and seconds, don't interfere with
-	 * hour overflow. This avoids messing with unknown time zones but
-	 * requires your RTC not to be off by more than 15 minutes
-	 */
-	real_seconds = nowtime % 60;
-	real_minutes = nowtime / 60;
-	if (((abs(real_minutes - cmos_minutes) + 15)/30) & 1)
-		real_minutes += 30;	/* correct for half hour time zone */
-	real_minutes %= 60;
-
-	if (abs(real_minutes - cmos_minutes) < 30) {
-		real_seconds = BIN2BCD(real_seconds);
-		real_minutes = BIN2BCD(real_minutes);
-		rtc->control |= M48T35_RTC_SET;
-		rtc->sec = real_seconds;
-		rtc->min = real_minutes;
-		rtc->control &= ~M48T35_RTC_SET;
-	} else {
-		printk(KERN_WARNING
-		       "set_rtc_mmss: can't update from %d to %d\n",
-		       cmos_minutes, real_minutes);
-		retval = -1;
-	}
-
-	return retval;
-}
-#endif
-
 /* Includes for ioc3_init().  */
 #include <asm/sn/types.h>
 #include <asm/sn/sn0/addrs.h>
@@ -80,37 +35,6 @@ static int set_rtc_mmss(unsigned long nowtime)
 #include <asm/sn/sn0/hubio.h>
 #include <asm/pci/bridge.h>
 
-unsigned long read_persistent_clock(void)
-{
-        unsigned int year, month, date, hour, min, sec;
-	struct m48t35_rtc *rtc;
-	nasid_t nid;
-
-	nid = get_nasid();
-	rtc = (struct m48t35_rtc *)(KL_CONFIG_CH_CONS_INFO(nid)->memory_base +
-							IOC3_BYTEBUS_DEV0);
-
-	rtc->control |= M48T35_RTC_READ;
-	sec = rtc->sec;
-	min = rtc->min;
-	hour = rtc->hour;
-	date = rtc->date;
-	month = rtc->month;
-	year = rtc->year;
-	rtc->control &= ~M48T35_RTC_READ;
-
-        sec = BCD2BIN(sec);
-        min = BCD2BIN(min);
-        hour = BCD2BIN(hour);
-        date = BCD2BIN(date);
-        month = BCD2BIN(month);
-        year = BCD2BIN(year);
-
-        year += 1970;
-
-        return mktime(year, month, date, hour, min, sec);
-}
-
 static void enable_rt_irq(unsigned int irq)
 {
 }
@@ -286,6 +210,7 @@ void __cpuinit cpu_time_init(void)
 
 void __cpuinit hub_rtc_init(cnodeid_t cnode)
 {
+
 	/*
 	 * We only need to initialize the current node.
 	 * If this is not the current node then it is a cpuless
@@ -301,3 +226,23 @@ void __cpuinit hub_rtc_init(cnodeid_t cnode)
 		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);

arch/mips/sgi-ip32/ip32-platform.c

@@ -90,6 +90,22 @@ static __init int sgio2btns_devinit(void)
 
 device_initcall(sgio2btns_devinit);
 
+static struct resource sgio2_cmos_rsrc[] = {
+	{
+		.start = 0x70,
+		.end   = 0x71,
+		.flags = IORESOURCE_IO
+	}
+};
+
+static __init int sgio2_cmos_devinit(void)
+{
+	return IS_ERR(platform_device_register_simple("rtc_cmos", -1,
+						      sgio2_cmos_rsrc, 1));
+}
+
+device_initcall(sgio2_cmos_devinit);
+
 MODULE_AUTHOR("Ralf Baechle <ralf@linux-mips.org>");
 MODULE_LICENSE("GPL");
 MODULE_DESCRIPTION("8250 UART probe driver for SGI IP32 aka O2");

arch/mips/sgi-ip32/ip32-setup.c

@@ -62,11 +62,6 @@ static inline void str2eaddr(unsigned char *ea, unsigned char *str)
 }
 #endif
 
-unsigned long read_persistent_clock(void)
-{
-	return mc146818_get_cmos_time();
-}
-
 /* An arbitrary time; this can be decreased if reliability looks good */
 #define WAIT_MS 10
 

drivers/rtc/Kconfig

@@ -352,6 +352,11 @@ config RTC_DRV_DS1216
 	help
 	  If you say yes here you get support for the Dallas DS1216 RTC chips.
 
+config RTC_DRV_DS1286
+	tristate "Dallas DS1286"
+	help
+	  If you say yes here you get support for the Dallas DS1286 RTC chips.
+
 config RTC_DRV_DS1302
 	tristate "Dallas DS1302"
 	depends on SH_SECUREEDGE5410
@@ -405,6 +410,15 @@ config RTC_DRV_M48T86
 	  This driver can also be built as a module. If so, the module
 	  will be called rtc-m48t86.
 
+config RTC_DRV_M48T35
+	tristate "ST M48T35"
+	help
+	  If you say Y here you will get support for the
+	  ST M48T35 RTC chip.
+
+	  This driver can also be built as a module, if so, the module
+	  will be called "rtc-m48t35".
+
 config RTC_DRV_M48T59
 	tristate "ST M48T59/M48T08/M48T02"
 	help

drivers/rtc/Makefile

@@ -23,6 +23,7 @@ obj-$(CONFIG_RTC_DRV_AT91SAM9)	+= rtc-at91sam9.o
 obj-$(CONFIG_RTC_DRV_BFIN)	+= rtc-bfin.o
 obj-$(CONFIG_RTC_DRV_CMOS)	+= rtc-cmos.o
 obj-$(CONFIG_RTC_DRV_DS1216)	+= rtc-ds1216.o
+obj-$(CONFIG_RTC_DRV_DS1286)	+= rtc-ds1286.o
 obj-$(CONFIG_RTC_DRV_DS1302)	+= rtc-ds1302.o
 obj-$(CONFIG_RTC_DRV_DS1305)	+= rtc-ds1305.o
 obj-$(CONFIG_RTC_DRV_DS1307)	+= rtc-ds1307.o
@@ -36,6 +37,7 @@ obj-$(CONFIG_RTC_DRV_FM3130)	+= rtc-fm3130.o
 obj-$(CONFIG_RTC_DRV_ISL1208)	+= rtc-isl1208.o
 obj-$(CONFIG_RTC_DRV_M41T80)	+= rtc-m41t80.o
 obj-$(CONFIG_RTC_DRV_M41T94)	+= rtc-m41t94.o
+obj-$(CONFIG_RTC_DRV_M48T35)	+= rtc-m48t35.o
 obj-$(CONFIG_RTC_DRV_M48T59)	+= rtc-m48t59.o
 obj-$(CONFIG_RTC_DRV_M48T86)	+= rtc-m48t86.o
 obj-$(CONFIG_RTC_DRV_BQ4802)	+= rtc-bq4802.o

drivers/rtc/rtc-ds1286.c

@@ -0,0 +1,409 @@
+/*
+ * DS1286 Real Time Clock interface for Linux
+ *
+ * Copyright (C) 1998, 1999, 2000 Ralf Baechle
+ * Copyright (C) 2008 Thomas Bogendoerfer
+ *
+ * Based on code written by Paul Gortmaker.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ */
+
+#include <linux/module.h>
+#include <linux/rtc.h>
+#include <linux/platform_device.h>
+#include <linux/bcd.h>
+#include <linux/ds1286.h>
+
+#define DRV_VERSION		"1.0"
+
+struct ds1286_priv {
+	struct rtc_device *rtc;
+	u32 __iomem *rtcregs;
+	size_t size;
+	unsigned long baseaddr;
+	spinlock_t lock;
+};
+
+static inline u8 ds1286_rtc_read(struct ds1286_priv *priv, int reg)
+{
+	return __raw_readl(&priv->rtcregs[reg]) & 0xff;
+}
+
+static inline void ds1286_rtc_write(struct ds1286_priv *priv, u8 data, int reg)
+{
+	__raw_writel(data, &priv->rtcregs[reg]);
+}
+
+#ifdef CONFIG_RTC_INTF_DEV
+
+static int ds1286_ioctl(struct device *dev, unsigned int cmd, unsigned long arg)
+{
+	struct ds1286_priv *priv = dev_get_drvdata(dev);
+	unsigned long flags;
+	unsigned char val;
+
+	switch (cmd) {
+	case RTC_AIE_OFF:
+		/* Mask alarm int. enab. bit	*/
+		spin_lock_irqsave(&priv->lock, flags);
+		val = ds1286_rtc_read(priv, RTC_CMD);
+		val |=  RTC_TDM;
+		ds1286_rtc_write(priv, val, RTC_CMD);
+		spin_unlock_irqrestore(&priv->lock, flags);
+		break;
+	case RTC_AIE_ON:
+		/* Allow alarm interrupts.	*/
+		spin_lock_irqsave(&priv->lock, flags);
+		val = ds1286_rtc_read(priv, RTC_CMD);
+		val &=  ~RTC_TDM;
+		ds1286_rtc_write(priv, val, RTC_CMD);
+		spin_unlock_irqrestore(&priv->lock, flags);
+		break;
+	case RTC_WIE_OFF:
+		/* Mask watchdog int. enab. bit	*/
+		spin_lock_irqsave(&priv->lock, flags);
+		val = ds1286_rtc_read(priv, RTC_CMD);
+		val |= RTC_WAM;
+		ds1286_rtc_write(priv, val, RTC_CMD);
+		spin_unlock_irqrestore(&priv->lock, flags);
+		break;
+	case RTC_WIE_ON:
+		/* Allow watchdog interrupts.	*/
+		spin_lock_irqsave(&priv->lock, flags);
+		val = ds1286_rtc_read(priv, RTC_CMD);
+		val &= ~RTC_WAM;
+		ds1286_rtc_write(priv, val, RTC_CMD);
+		spin_unlock_irqrestore(&priv->lock, flags);
+		break;
+	default:
+		return -ENOIOCTLCMD;
+	}
+	return 0;
+}
+
+#else
+#define ds1286_ioctl    NULL
+#endif
+
+#ifdef CONFIG_PROC_FS
+
+static int ds1286_proc(struct device *dev, struct seq_file *seq)
+{
+	struct ds1286_priv *priv = dev_get_drvdata(dev);
+	unsigned char month, cmd, amode;
+	const char *s;
+
+	month = ds1286_rtc_read(priv, RTC_MONTH);
+	seq_printf(seq,
+		   "oscillator\t: %s\n"
+		   "square_wave\t: %s\n",
+		   (month & RTC_EOSC) ? "disabled" : "enabled",
+		   (month & RTC_ESQW) ? "disabled" : "enabled");
+
+	amode = ((ds1286_rtc_read(priv, RTC_MINUTES_ALARM) & 0x80) >> 5) |
+		((ds1286_rtc_read(priv, RTC_HOURS_ALARM) & 0x80) >> 6) |
+		((ds1286_rtc_read(priv, RTC_DAY_ALARM) & 0x80) >> 7);
+	switch (amode) {
+	case 7:
+		s = "each minute";
+		break;
+	case 3:
+		s = "minutes match";
+		break;
+	case 1:
+		s = "hours and minutes match";
+		break;
+	case 0:
+		s = "days, hours and minutes match";
+		break;
+	default:
+		s = "invalid";
+		break;
+	}
+	seq_printf(seq, "alarm_mode\t: %s\n", s);
+
+	cmd = ds1286_rtc_read(priv, RTC_CMD);
+	seq_printf(seq,
+		   "alarm_enable\t: %s\n"
+		   "wdog_alarm\t: %s\n"
+		   "alarm_mask\t: %s\n"
+		   "wdog_alarm_mask\t: %s\n"
+		   "interrupt_mode\t: %s\n"
+		   "INTB_mode\t: %s_active\n"
+		   "interrupt_pins\t: %s\n",
+		   (cmd & RTC_TDF) ? "yes" : "no",
+		   (cmd & RTC_WAF) ? "yes" : "no",
+		   (cmd & RTC_TDM) ? "disabled" : "enabled",
+		   (cmd & RTC_WAM) ? "disabled" : "enabled",
+		   (cmd & RTC_PU_LVL) ? "pulse" : "level",
+		   (cmd & RTC_IBH_LO) ? "low" : "high",
+		   (cmd & RTC_IPSW) ? "unswapped" : "swapped");
+	return 0;
+}
+
+#else
+#define ds1286_proc     NULL
+#endif
+
+static int ds1286_read_time(struct device *dev, struct rtc_time *tm)
+{
+	struct ds1286_priv *priv = dev_get_drvdata(dev);
+	unsigned char save_control;
+	unsigned long flags;
+	unsigned long uip_watchdog = jiffies;
+
+	/*
+	 * read RTC once any update in progress is done. The update
+	 * can take just over 2ms. We wait 10 to 20ms. There is no need to
+	 * to poll-wait (up to 1s - eeccch) for the falling edge of RTC_UIP.
+	 * If you need to know *exactly* when a second has started, enable
+	 * periodic update complete interrupts, (via ioctl) and then
+	 * immediately read /dev/rtc which will block until you get the IRQ.
+	 * Once the read clears, read the RTC time (again via ioctl). Easy.
+	 */
+
+	if (ds1286_rtc_read(priv, RTC_CMD) & RTC_TE)
+		while (time_before(jiffies, uip_watchdog + 2*HZ/100))
+			barrier();
+
+	/*
+	 * Only the values that we read from the RTC are set. We leave
+	 * tm_wday, tm_yday and tm_isdst untouched. Even though the
+	 * RTC has RTC_DAY_OF_WEEK, we ignore it, as it is only updated
+	 * by the RTC when initially set to a non-zero value.
+	 */
+	spin_lock_irqsave(&priv->lock, flags);
+	save_control = ds1286_rtc_read(priv, RTC_CMD);
+	ds1286_rtc_write(priv, (save_control|RTC_TE), RTC_CMD);
+
+	tm->tm_sec = ds1286_rtc_read(priv, RTC_SECONDS);
+	tm->tm_min = ds1286_rtc_read(priv, RTC_MINUTES);
+	tm->tm_hour = ds1286_rtc_read(priv, RTC_HOURS) & 0x3f;
+	tm->tm_mday = ds1286_rtc_read(priv, RTC_DATE);
+	tm->tm_mon = ds1286_rtc_read(priv, RTC_MONTH) & 0x1f;
+	tm->tm_year = ds1286_rtc_read(priv, RTC_YEAR);
+
+	ds1286_rtc_write(priv, save_control, RTC_CMD);
+	spin_unlock_irqrestore(&priv->lock, flags);
+
+	tm->tm_sec = bcd2bin(tm->tm_sec);
+	tm->tm_min = bcd2bin(tm->tm_min);
+	tm->tm_hour = bcd2bin(tm->tm_hour);
+	tm->tm_mday = bcd2bin(tm->tm_mday);
+	tm->tm_mon = bcd2bin(tm->tm_mon);
+	tm->tm_year = bcd2bin(tm->tm_year);
+
+	/*
+	 * Account for differences between how the RTC uses the values
+	 * and how they are defined in a struct rtc_time;
+	 */
+	if (tm->tm_year < 45)
+		tm->tm_year += 30;
+	tm->tm_year += 40;
+	if (tm->tm_year < 70)
+		tm->tm_year += 100;
+
+	tm->tm_mon--;
+
+	return rtc_valid_tm(tm);
+}
+
+static int ds1286_set_time(struct device *dev, struct rtc_time *tm)
+{
+	struct ds1286_priv *priv = dev_get_drvdata(dev);
+	unsigned char mon, day, hrs, min, sec;
+	unsigned char save_control;
+	unsigned int yrs;
+	unsigned long flags;
+
+	yrs = tm->tm_year + 1900;
+	mon = tm->tm_mon + 1;   /* tm_mon starts at zero */
+	day = tm->tm_mday;
+	hrs = tm->tm_hour;
+	min = tm->tm_min;
+	sec = tm->tm_sec;
+
+	if (yrs < 1970)
+		return -EINVAL;
+
+	yrs -= 1940;
+	if (yrs > 255)    /* They are unsigned */
+		return -EINVAL;
+
+	if (yrs >= 100)
+		yrs -= 100;
+
+	sec = bin2bcd(sec);
+	min = bin2bcd(min);
+	hrs = bin2bcd(hrs);
+	day = bin2bcd(day);
+	mon = bin2bcd(mon);
+	yrs = bin2bcd(yrs);
+
+	spin_lock_irqsave(&priv->lock, flags);
+	save_control = ds1286_rtc_read(priv, RTC_CMD);
+	ds1286_rtc_write(priv, (save_control|RTC_TE), RTC_CMD);
+
+	ds1286_rtc_write(priv, yrs, RTC_YEAR);
+	ds1286_rtc_write(priv, mon, RTC_MONTH);
+	ds1286_rtc_write(priv, day, RTC_DATE);
+	ds1286_rtc_write(priv, hrs, RTC_HOURS);
+	ds1286_rtc_write(priv, min, RTC_MINUTES);
+	ds1286_rtc_write(priv, sec, RTC_SECONDS);
+	ds1286_rtc_write(priv, 0, RTC_HUNDREDTH_SECOND);
+
+	ds1286_rtc_write(priv, save_control, RTC_CMD);
+	spin_unlock_irqrestore(&priv->lock, flags);
+	return 0;
+}
+
+static int ds1286_read_alarm(struct device *dev, struct rtc_wkalrm *alm)
+{
+	struct ds1286_priv *priv = dev_get_drvdata(dev);
+	unsigned char cmd;
+	unsigned long flags;
+
+	/*
+	 * Only the values that we read from the RTC are set. That
+	 * means only tm_wday, tm_hour, tm_min.
+	 */
+	spin_lock_irqsave(&priv->lock, flags);
+	alm->time.tm_min = ds1286_rtc_read(priv, RTC_MINUTES_ALARM) & 0x7f;
+	alm->time.tm_hour = ds1286_rtc_read(priv, RTC_HOURS_ALARM)  & 0x1f;
+	alm->time.tm_wday = ds1286_rtc_read(priv, RTC_DAY_ALARM)    & 0x07;
+	cmd = ds1286_rtc_read(priv, RTC_CMD);
+	spin_unlock_irqrestore(&priv->lock, flags);
+
+	alm->time.tm_min = bcd2bin(alm->time.tm_min);
+	alm->time.tm_hour = bcd2bin(alm->time.tm_hour);
+	alm->time.tm_sec = 0;
+	return 0;
+}
+
+static int ds1286_set_alarm(struct device *dev, struct rtc_wkalrm *alm)
+{
+	struct ds1286_priv *priv = dev_get_drvdata(dev);
+	unsigned char hrs, min, sec;
+
+	hrs = alm->time.tm_hour;
+	min = alm->time.tm_min;
+	sec = alm->time.tm_sec;
+
+	if (hrs >= 24)
+		hrs = 0xff;
+
+	if (min >= 60)
+		min = 0xff;
+
+	if (sec != 0)
+		return -EINVAL;
+
+	min = bin2bcd(min);
+	hrs = bin2bcd(hrs);
+
+	spin_lock(&priv->lock);
+	ds1286_rtc_write(priv, hrs, RTC_HOURS_ALARM);
+	ds1286_rtc_write(priv, min, RTC_MINUTES_ALARM);
+	spin_unlock(&priv->lock);
+
+	return 0;
+}
+
+static const struct rtc_class_ops ds1286_ops = {
+	.ioctl   	= ds1286_ioctl,
+	.proc   	= ds1286_proc,
+	.read_time	= ds1286_read_time,
+	.set_time	= ds1286_set_time,
+	.read_alarm	= ds1286_read_alarm,
+	.set_alarm	= ds1286_set_alarm,
+};
+
+static int __devinit ds1286_probe(struct platform_device *pdev)
+{
+	struct rtc_device *rtc;
+	struct resource *res;
+	struct ds1286_priv *priv;
+	int ret = 0;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!res)
+		return -ENODEV;
+	priv = kzalloc(sizeof(struct ds1286_priv), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+
+	priv->size = res->end - res->start + 1;
+	if (!request_mem_region(res->start, priv->size, pdev->name)) {
+		ret = -EBUSY;
+		goto out;
+	}
+	priv->baseaddr = res->start;
+	priv->rtcregs = ioremap(priv->baseaddr, priv->size);
+	if (!priv->rtcregs) {
+		ret = -ENOMEM;
+		goto out;
+	}
+	spin_lock_init(&priv->lock);
+	rtc = rtc_device_register("ds1286", &pdev->dev,
+				  &ds1286_ops, THIS_MODULE);
+	if (IS_ERR(rtc)) {
+		ret = PTR_ERR(rtc);
+		goto out;
+	}
+	priv->rtc = rtc;
+	platform_set_drvdata(pdev, priv);
+	return 0;
+
+out:
+	if (priv->rtc)
+		rtc_device_unregister(priv->rtc);
+	if (priv->rtcregs)
+		iounmap(priv->rtcregs);
+	if (priv->baseaddr)
+		release_mem_region(priv->baseaddr, priv->size);
+	kfree(priv);
+	return ret;
+}
+
+static int __devexit ds1286_remove(struct platform_device *pdev)
+{
+	struct ds1286_priv *priv = platform_get_drvdata(pdev);
+
+	rtc_device_unregister(priv->rtc);
+	iounmap(priv->rtcregs);
+	release_mem_region(priv->baseaddr, priv->size);
+	kfree(priv);
+	return 0;
+}
+
+static struct platform_driver ds1286_platform_driver = {
+	.driver		= {
+		.name	= "rtc-ds1286",
+		.owner	= THIS_MODULE,
+	},
+	.probe		= ds1286_probe,
+	.remove		= __devexit_p(ds1286_remove),
+};
+
+static int __init ds1286_init(void)
+{
+	return platform_driver_register(&ds1286_platform_driver);
+}
+
+static void __exit ds1286_exit(void)
+{
+	platform_driver_unregister(&ds1286_platform_driver);
+}
+
+MODULE_AUTHOR("Thomas Bogendoerfer <tsbogend@alpha.franken.de>");
+MODULE_DESCRIPTION("DS1286 RTC driver");
+MODULE_LICENSE("GPL");
+MODULE_VERSION(DRV_VERSION);
+MODULE_ALIAS("platform:rtc-ds1286");
+
+module_init(ds1286_init);
+module_exit(ds1286_exit);

drivers/rtc/rtc-m48t35.c

@@ -0,0 +1,234 @@
+/*
+ * Driver for the SGS-Thomson M48T35 Timekeeper RAM chip
+ *
+ * Copyright (C) 2000 Silicon Graphics, Inc.
+ * Written by Ulf Carlsson (ulfc@engr.sgi.com)
+ *
+ * Copyright (C) 2008 Thomas Bogendoerfer
+ *
+ * Based on code written by Paul Gortmaker.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ */
+
+#include <linux/module.h>
+#include <linux/rtc.h>
+#include <linux/platform_device.h>
+#include <linux/bcd.h>
+
+#define DRV_VERSION		"1.0"
+
+struct m48t35_rtc {
+	u8	pad[0x7ff8];    /* starts at 0x7ff8 */
+	u8	control;
+	u8	sec;
+	u8	min;
+	u8	hour;
+	u8	day;
+	u8	date;
+	u8	month;
+	u8	year;
+};
+
+#define M48T35_RTC_SET		0x80
+#define M48T35_RTC_READ		0x40
+
+struct m48t35_priv {
+	struct rtc_device *rtc;
+	struct m48t35_rtc __iomem *reg;
+	size_t size;
+	unsigned long baseaddr;
+	spinlock_t lock;
+};
+
+static int m48t35_read_time(struct device *dev, struct rtc_time *tm)
+{
+	struct m48t35_priv *priv = dev_get_drvdata(dev);
+	u8 control;
+
+	/*
+	 * Only the values that we read from the RTC are set. We leave
+	 * tm_wday, tm_yday and tm_isdst untouched. Even though the
+	 * RTC has RTC_DAY_OF_WEEK, we ignore it, as it is only updated
+	 * by the RTC when initially set to a non-zero value.
+	 */
+	spin_lock_irq(&priv->lock);
+	control = readb(&priv->reg->control);
+	writeb(control | M48T35_RTC_READ, &priv->reg->control);
+	tm->tm_sec = readb(&priv->reg->sec);
+	tm->tm_min = readb(&priv->reg->min);
+	tm->tm_hour = readb(&priv->reg->hour);
+	tm->tm_mday = readb(&priv->reg->date);
+	tm->tm_mon = readb(&priv->reg->month);
+	tm->tm_year = readb(&priv->reg->year);
+	writeb(control, &priv->reg->control);
+	spin_unlock_irq(&priv->lock);
+
+	tm->tm_sec = bcd2bin(tm->tm_sec);
+	tm->tm_min = bcd2bin(tm->tm_min);
+	tm->tm_hour = bcd2bin(tm->tm_hour);
+	tm->tm_mday = bcd2bin(tm->tm_mday);
+	tm->tm_mon = bcd2bin(tm->tm_mon);
+	tm->tm_year = bcd2bin(tm->tm_year);
+
+	/*
+	 * Account for differences between how the RTC uses the values
+	 * and how they are defined in a struct rtc_time;
+	 */
+	tm->tm_year += 70;
+	if (tm->tm_year <= 69)
+		tm->tm_year += 100;
+
+	tm->tm_mon--;
+	return rtc_valid_tm(tm);
+}
+
+static int m48t35_set_time(struct device *dev, struct rtc_time *tm)
+{
+	struct m48t35_priv *priv = dev_get_drvdata(dev);
+	unsigned char mon, day, hrs, min, sec;
+	unsigned int yrs;
+	u8 control;
+
+	yrs = tm->tm_year + 1900;
+	mon = tm->tm_mon + 1;   /* tm_mon starts at zero */
+	day = tm->tm_mday;
+	hrs = tm->tm_hour;
+	min = tm->tm_min;
+	sec = tm->tm_sec;
+
+	if (yrs < 1970)
+		return -EINVAL;
+
+	yrs -= 1970;
+	if (yrs > 255)    /* They are unsigned */
+		return -EINVAL;
+
+	if (yrs > 169)
+		return -EINVAL;
+
+	if (yrs >= 100)
+		yrs -= 100;
+
+	sec = bin2bcd(sec);
+	min = bin2bcd(min);
+	hrs = bin2bcd(hrs);
+	day = bin2bcd(day);
+	mon = bin2bcd(mon);
+	yrs = bin2bcd(yrs);
+
+	spin_lock_irq(&priv->lock);
+	control = readb(&priv->reg->control);
+	writeb(control | M48T35_RTC_SET, &priv->reg->control);
+	writeb(yrs, &priv->reg->year);
+	writeb(mon, &priv->reg->month);
+	writeb(day, &priv->reg->date);
+	writeb(hrs, &priv->reg->hour);
+	writeb(min, &priv->reg->min);
+	writeb(sec, &priv->reg->sec);
+	writeb(control, &priv->reg->control);
+	spin_unlock_irq(&priv->lock);
+	return 0;
+}
+
+static const struct rtc_class_ops m48t35_ops = {
+	.read_time	= m48t35_read_time,
+	.set_time	= m48t35_set_time,
+};
+
+static int __devinit m48t35_probe(struct platform_device *pdev)
+{
+	struct rtc_device *rtc;
+	struct resource *res;
+	struct m48t35_priv *priv;
+	int ret = 0;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!res)
+		return -ENODEV;
+	priv = kzalloc(sizeof(struct m48t35_priv), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+
+	priv->size = res->end - res->start + 1;
+	/*
+	 * kludge: remove the #ifndef after ioc3 resource
+	 * conflicts are resolved
+	 */
+#ifndef CONFIG_SGI_IP27
+	if (!request_mem_region(res->start, priv->size, pdev->name)) {
+		ret = -EBUSY;
+		goto out;
+	}
+#endif
+	priv->baseaddr = res->start;
+	priv->reg = ioremap(priv->baseaddr, priv->size);
+	if (!priv->reg) {
+		ret = -ENOMEM;
+		goto out;
+	}
+	spin_lock_init(&priv->lock);
+	rtc = rtc_device_register("m48t35", &pdev->dev,
+				  &m48t35_ops, THIS_MODULE);
+	if (IS_ERR(rtc)) {
+		ret = PTR_ERR(rtc);
+		goto out;
+	}
+	priv->rtc = rtc;
+	platform_set_drvdata(pdev, priv);
+	return 0;
+
+out:
+	if (priv->rtc)
+		rtc_device_unregister(priv->rtc);
+	if (priv->reg)
+		iounmap(priv->reg);
+	if (priv->baseaddr)
+		release_mem_region(priv->baseaddr, priv->size);
+	kfree(priv);
+	return ret;
+}
+
+static int __devexit m48t35_remove(struct platform_device *pdev)
+{
+	struct m48t35_priv *priv = platform_get_drvdata(pdev);
+
+	rtc_device_unregister(priv->rtc);
+	iounmap(priv->reg);
+#ifndef CONFIG_SGI_IP27
+	release_mem_region(priv->baseaddr, priv->size);
+#endif
+	kfree(priv);
+	return 0;
+}
+
+static struct platform_driver m48t35_platform_driver = {
+	.driver		= {
+		.name	= "rtc-m48t35",
+		.owner	= THIS_MODULE,
+	},
+	.probe		= m48t35_probe,
+	.remove		= __devexit_p(m48t35_remove),
+};
+
+static int __init m48t35_init(void)
+{
+	return platform_driver_register(&m48t35_platform_driver);
+}
+
+static void __exit m48t35_exit(void)
+{
+	platform_driver_unregister(&m48t35_platform_driver);
+}
+
+MODULE_AUTHOR("Thomas Bogendoerfer <tsbogend@alpha.franken.de>");
+MODULE_DESCRIPTION("M48T35 RTC driver");
+MODULE_LICENSE("GPL");
+MODULE_VERSION(DRV_VERSION);
+MODULE_ALIAS("platform:rtc-m48t35");
+
+module_init(m48t35_init);
+module_exit(m48t35_exit);

include/linux/ds1286.h

@@ -8,8 +8,6 @@
 #ifndef __LINUX_DS1286_H
 #define __LINUX_DS1286_H
 
-#include <asm/ds1286.h>
-
 /**********************************************************************
  * register summary
  **********************************************************************/