Merge branch 'linus' into x86/timerstip-x86-timers-2008-06-16_09.20_Mon

1 files changed, 35 insertions, 43 deletions

diff --git a/arch/mips/au1000/common/time.c b/arch/mips/au1000/common/time.c
index bdb6d73b26fb..563d9390a872 100644
--- a/arch/mips/au1000/common/time.c
+++ b/arch/mips/au1000/common/time.c
@@ -25,11 +25,9 @@
  *
  * Setting up the clock on the MIPS boards.
  *
- * Update.  Always configure the kernel with CONFIG_NEW_TIME_C.  This
- * will use the user interface gettimeofday() functions from the
- * arch/mips/kernel/time.c, and we provide the clock interrupt processing
- * and the timer offset compute functions.  If CONFIG_PM is selected,
- * we also ensure the 32KHz timer is available.   -- Dan
+ * We provide the clock interrupt processing and the timer offset compute
+ * functions.  If CONFIG_PM is selected, we also ensure the 32KHz timer is
+ * available.  -- Dan
  */
 
 #include <linux/types.h>
@@ -47,8 +45,7 @@ extern int allow_au1k_wait; /* default off for CP0 Counter */
 #if HZ < 100 || HZ > 1000
 #error "unsupported HZ value! Must be in [100,1000]"
 #endif
-#define MATCH20_INC (328*100/HZ) /* magic number 328 is for HZ=100... */
-extern void startup_match20_interrupt(irq_handler_t handler);
+#define MATCH20_INC (328 * 100 / HZ) /* magic number 328 is for HZ=100... */
 static unsigned long last_pc0, last_match20;
 #endif
 
@@ -61,7 +58,7 @@ static irqreturn_t counter0_irq(int irq, void *dev_id)
 {
 	unsigned long pc0;
 	int time_elapsed;
-	static int jiffie_drift = 0;
+	static int jiffie_drift;
 
 	if (au_readl(SYS_COUNTER_CNTRL) & SYS_CNTRL_M20) {
 		/* should never happen! */
@@ -70,13 +67,11 @@ static irqreturn_t counter0_irq(int irq, void *dev_id)
 	}
 
 	pc0 = au_readl(SYS_TOYREAD);
-	if (pc0 < last_match20) {
+	if (pc0 < last_match20)
 		/* counter overflowed */
 		time_elapsed = (0xffffffff - last_match20) + pc0;
-	}
-	else {
+	else
 		time_elapsed = pc0 - last_match20;
-	}
 
 	while (time_elapsed > 0) {
 		do_timer(1);
@@ -92,8 +87,9 @@ static irqreturn_t counter0_irq(int irq, void *dev_id)
 	au_writel(last_match20 + MATCH20_INC, SYS_TOYMATCH2);
 	au_sync();
 
-	/* our counter ticks at 10.009765625 ms/tick, we we're running
-	 * almost 10uS too slow per tick.
+	/*
+	 * Our counter ticks at 10.009765625 ms/tick, we we're running
+	 * almost 10 uS too slow per tick.
 	 */
 
 	if (jiffie_drift >= 999) {
@@ -117,20 +113,17 @@ struct irqaction counter0_action = {
 /* When we wakeup from sleep, we have to "catch up" on all of the
  * timer ticks we have missed.
  */
-void
-wakeup_counter0_adjust(void)
+void wakeup_counter0_adjust(void)
 {
 	unsigned long pc0;
 	int time_elapsed;
 
 	pc0 = au_readl(SYS_TOYREAD);
-	if (pc0 < last_match20) {
+	if (pc0 < last_match20)
 		/* counter overflowed */
 		time_elapsed = (0xffffffff - last_match20) + pc0;
-	}
-	else {
+	else
 		time_elapsed = pc0 - last_match20;
-	}
 
 	while (time_elapsed > 0) {
 		time_elapsed -= MATCH20_INC;
@@ -143,10 +136,8 @@ wakeup_counter0_adjust(void)
 
 }
 
-/* This is just for debugging to set the timer for a sleep delay.
-*/
-void
-wakeup_counter0_set(int ticks)
+/* This is just for debugging to set the timer for a sleep delay. */
+void wakeup_counter0_set(int ticks)
 {
 	unsigned long pc0;
 
@@ -157,21 +148,22 @@ wakeup_counter0_set(int ticks)
 }
 #endif
 
-/* I haven't found anyone that doesn't use a 12 MHz source clock,
+/*
+ * I haven't found anyone that doesn't use a 12 MHz source clock,
  * but just in case.....
  */
 #define AU1000_SRC_CLK	12000000
 
 /*
  * We read the real processor speed from the PLL.  This is important
- * because it is more accurate than computing it from the 32KHz
+ * because it is more accurate than computing it from the 32 KHz
  * counter, if it exists.  If we don't have an accurate processor
  * speed, all of the peripherals that derive their clocks based on
  * this advertised speed will introduce error and sometimes not work
  * properly.  This function is futher convoluted to still allow configurations
  * to do that in case they have really, really old silicon with a
- * write-only PLL register, that we need the 32KHz when power management
- * "wait" is enabled, and we need to detect if the 32KHz isn't present
+ * write-only PLL register, that we need the 32 KHz when power management
+ * "wait" is enabled, and we need to detect if the 32 KHz isn't present
  * but requested......got it? :-)		-- Dan
  */
 unsigned long calc_clock(void)
@@ -182,8 +174,7 @@ unsigned long calc_clock(void)
 
 	spin_lock_irqsave(&time_lock, flags);
 
-	/* Power management cares if we don't have a 32KHz counter.
-	*/
+	/* Power management cares if we don't have a 32 KHz counter. */
 	no_au1xxx_32khz = 0;
 	counter = au_readl(SYS_COUNTER_CNTRL);
 	if (counter & SYS_CNTRL_E0) {
@@ -193,7 +184,7 @@ unsigned long calc_clock(void)
 
 		while (au_readl(SYS_COUNTER_CNTRL) & SYS_CNTRL_T1S);
 		/* RTC now ticks at 32.768/16 kHz */
-		au_writel(trim_divide-1, SYS_RTCTRIM);
+		au_writel(trim_divide - 1, SYS_RTCTRIM);
 		while (au_readl(SYS_COUNTER_CNTRL) & SYS_CNTRL_T1S);
 
 		while (au_readl(SYS_COUNTER_CNTRL) & SYS_CNTRL_C1S);
@@ -215,9 +206,11 @@ unsigned long calc_clock(void)
 #endif
 	else
 		cpu_speed = (au_readl(SYS_CPUPLL) & 0x0000003f) * AU1000_SRC_CLK;
+	/* On Alchemy CPU:counter ratio is 1:1 */
 	mips_hpt_frequency = cpu_speed;
-	// Equation: Baudrate = CPU / (SD * 2 * CLKDIV * 16)
-	set_au1x00_uart_baud_base(cpu_speed / (2 * ((int)(au_readl(SYS_POWERCTRL)&0x03) + 2) * 16));
+	/* Equation: Baudrate = CPU / (SD * 2 * CLKDIV * 16) */
+	set_au1x00_uart_baud_base(cpu_speed / (2 * ((int)(au_readl(SYS_POWERCTRL)
+							  & 0x03) + 2) * 16));
 	spin_unlock_irqrestore(&time_lock, flags);
 	return cpu_speed;
 }
@@ -228,10 +221,10 @@ void __init plat_time_init(void)
 
 	est_freq += 5000;    /* round */
 	est_freq -= est_freq%10000;
-	printk("CPU frequency %d.%02d MHz\n", est_freq/1000000,
-	       (est_freq%1000000)*100/1000000);
- 	set_au1x00_speed(est_freq);
- 	set_au1x00_lcd_clock(); // program the LCD clock
+	printk(KERN_INFO "CPU frequency %u.%02u MHz\n",
+	       est_freq / 1000000, ((est_freq % 1000000) * 100) / 1000000);
+	set_au1x00_speed(est_freq);
+	set_au1x00_lcd_clock(); /* program the LCD clock */
 
 #ifdef CONFIG_PM
 	/*
@@ -243,30 +236,29 @@ void __init plat_time_init(void)
 	 * counter 0 interrupt as a special irq and it doesn't show
 	 * up under /proc/interrupts.
 	 *
-	 * Check to ensure we really have a 32KHz oscillator before
+	 * Check to ensure we really have a 32 KHz oscillator before
 	 * we do this.
 	 */
 	if (no_au1xxx_32khz)
-		printk("WARNING: no 32KHz clock found.\n");
+		printk(KERN_WARNING "WARNING: no 32KHz clock found.\n");
 	else {
 		while (au_readl(SYS_COUNTER_CNTRL) & SYS_CNTRL_C0S);
 		au_writel(0, SYS_TOYWRITE);
 		while (au_readl(SYS_COUNTER_CNTRL) & SYS_CNTRL_C0S);
 
-		au_writel(au_readl(SYS_WAKEMSK) | (1<<8), SYS_WAKEMSK);
+		au_writel(au_readl(SYS_WAKEMSK) | (1 << 8), SYS_WAKEMSK);
 		au_writel(~0, SYS_WAKESRC);
 		au_sync();
 		while (au_readl(SYS_COUNTER_CNTRL) & SYS_CNTRL_M20);
 
-		/* setup match20 to interrupt once every HZ */
+		/* Setup match20 to interrupt once every HZ */
 		last_pc0 = last_match20 = au_readl(SYS_TOYREAD);
 		au_writel(last_match20 + MATCH20_INC, SYS_TOYMATCH2);
 		au_sync();
 		while (au_readl(SYS_COUNTER_CNTRL) & SYS_CNTRL_M20);
 		setup_irq(AU1000_TOY_MATCH2_INT, &counter0_action);
 
-		/* We can use the real 'wait' instruction.
-		*/
+		/* We can use the real 'wait' instruction. */
 		allow_au1k_wait = 1;
 	}