[SPARC]: Provide generic ioctls in Sparc RTC driver.

Provide support for drivers/char/rtc.c ioctls in the
Mostek rtc driver as well as the Sparc specific RTCGET
and RTCSET.

This allows userspace to be much less messy.  Currently
util-linux and other spots jump through hoops trying
various ioctl variants until it hits the right one whatever
driver actually being used supports.

Eventually all of this should move over to the genrtc.c
driver, but not today...

While we are here, fix up the register types for sparse.

Thanks to Frans Pop for helping point out this issue.

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 21 insertions, 16 deletions

diff --git a/arch/sparc64/kernel/time.c b/arch/sparc64/kernel/time.c
index 6a717d4d2bc5..c60785c046be 100644
--- a/arch/sparc64/kernel/time.c
+++ b/arch/sparc64/kernel/time.c
@@ -48,7 +48,7 @@
 
 DEFINE_SPINLOCK(mostek_lock);
 DEFINE_SPINLOCK(rtc_lock);
-unsigned long mstk48t02_regs = 0UL;
+void * __iomem mstk48t02_regs = 0UL;
 #ifdef CONFIG_PCI
 unsigned long ds1287_regs = 0UL;
 #endif
@@ -59,8 +59,8 @@ u64 jiffies_64 = INITIAL_JIFFIES;
 
 EXPORT_SYMBOL(jiffies_64);
 
-static unsigned long mstk48t08_regs = 0UL;
-static unsigned long mstk48t59_regs = 0UL;
+static void * __iomem mstk48t08_regs;
+static void * __iomem mstk48t59_regs;
 
 static int set_rtc_mmss(unsigned long);
 
@@ -520,7 +520,7 @@ void timer_tick_interrupt(struct pt_regs *regs)
 /* Kick start a stopped clock (procedure from the Sun NVRAM/hostid FAQ). */
 static void __init kick_start_clock(void)
 {
-	unsigned long regs = mstk48t02_regs;
+	void * __iomem regs = mstk48t02_regs;
 	u8 sec, tmp;
 	int i, count;
 
@@ -604,7 +604,7 @@ static void __init kick_start_clock(void)
 /* Return nonzero if the clock chip battery is low. */
 static int __init has_low_battery(void)
 {
-	unsigned long regs = mstk48t02_regs;
+	void * __iomem regs = mstk48t02_regs;
 	u8 data1, data2;
 
 	spin_lock_irq(&mostek_lock);
@@ -623,7 +623,7 @@ static int __init has_low_battery(void)
 static void __init set_system_time(void)
 {
 	unsigned int year, mon, day, hour, min, sec;
-	unsigned long mregs = mstk48t02_regs;
+	void * __iomem mregs = mstk48t02_regs;
 #ifdef CONFIG_PCI
 	unsigned long dregs = ds1287_regs;
 #else
@@ -843,7 +843,8 @@ void __init clock_probe(void)
 			    !strcmp(model, "m5823")) {
 				ds1287_regs = edev->resource[0].start;
 			} else {
-				mstk48t59_regs = edev->resource[0].start;
+				mstk48t59_regs = (void * __iomem)
+					edev->resource[0].start;
 				mstk48t02_regs = mstk48t59_regs + MOSTEK_48T59_48T02;
 			}
 			break;
@@ -865,7 +866,8 @@ try_isa_clock:
 			    !strcmp(model, "m5823")) {
 				ds1287_regs = isadev->resource.start;
 			} else {
-				mstk48t59_regs = isadev->resource.start;
+				mstk48t59_regs = (void * __iomem)
+					isadev->resource.start;
 				mstk48t02_regs = mstk48t59_regs + MOSTEK_48T59_48T02;
 			}
 			break;
@@ -893,21 +895,24 @@ try_isa_clock:
 		}
 
 		if(model[5] == '0' && model[6] == '2') {
-			mstk48t02_regs = (((u64)clk_reg[0].phys_addr) |
-					  (((u64)clk_reg[0].which_io)<<32UL));
+			mstk48t02_regs = (void * __iomem)
+				(((u64)clk_reg[0].phys_addr) |
+				 (((u64)clk_reg[0].which_io)<<32UL));
 		} else if(model[5] == '0' && model[6] == '8') {
-			mstk48t08_regs = (((u64)clk_reg[0].phys_addr) |
-					  (((u64)clk_reg[0].which_io)<<32UL));
+			mstk48t08_regs = (void * __iomem)
+				(((u64)clk_reg[0].phys_addr) |
+				 (((u64)clk_reg[0].which_io)<<32UL));
 			mstk48t02_regs = mstk48t08_regs + MOSTEK_48T08_48T02;
 		} else {
-			mstk48t59_regs = (((u64)clk_reg[0].phys_addr) |
-					  (((u64)clk_reg[0].which_io)<<32UL));
+			mstk48t59_regs = (void * __iomem)
+				(((u64)clk_reg[0].phys_addr) |
+				 (((u64)clk_reg[0].which_io)<<32UL));
 			mstk48t02_regs = mstk48t59_regs + MOSTEK_48T59_48T02;
 		}
 		break;
 	}
 
-	if (mstk48t02_regs != 0UL) {
+	if (mstk48t02_regs != NULL) {
 		/* Report a low battery voltage condition. */
 		if (has_low_battery())
 			prom_printf("NVRAM: Low battery voltage!\n");
@@ -1087,7 +1092,7 @@ unsigned long long sched_clock(void)
 static int set_rtc_mmss(unsigned long nowtime)
 {
 	int real_seconds, real_minutes, chip_minutes;
-	unsigned long mregs = mstk48t02_regs;
+	void * __iomem mregs = mstk48t02_regs;
 #ifdef CONFIG_PCI
 	unsigned long dregs = ds1287_regs;
 #else