ARM: sa11x0/pxa: acquire timer rate from the clock rate

As both pxa and sa1100 provide a clock to the timer, the rate can be
inferred from the clock rather than hard encoded in a functional call.

This patch changes the pxa timer to have a mandatory clock which is used
as the timer rate.

Signed-off-by: Robert Jarzmik <[e-mail]>
Acked-by: Daniel Lezcano <[e-mail]>
Acked-by: Russell King <[e-mail]>

arch/arm/mach-pxa/generic.c

···
 		pxa27x_clocks_init();
 	if (cpu_is_pxa3xx())
 		pxa3xx_clocks_init();
-	pxa_timer_nodt_init(IRQ_OST0, io_p2v(0x40a00000),
-			    get_clock_tick_rate());
+	pxa_timer_nodt_init(IRQ_OST0, io_p2v(0x40a00000));
 }
 
 /*

arch/arm/mach-sa1100/generic.c

···
 
 void __init sa1100_timer_init(void)
 {
-	pxa_timer_nodt_init(IRQ_OST0, io_p2v(0x90000000), 3686400);
+	pxa_timer_nodt_init(IRQ_OST0, io_p2v(0x90000000));
 }
 
 static struct resource irq_resource =

drivers/clocksource/pxa_timer.c

···
 /*
  * Legacy timer init for non device-tree boards.
  */
-void __init pxa_timer_nodt_init(int irq, void __iomem *base,
-	unsigned long clock_tick_rate)
+void __init pxa_timer_nodt_init(int irq, void __iomem *base)
 {
 	struct clk *clk;
 
 	timer_base = base;
 	clk = clk_get(NULL, "OSTIMER0");
-	if (clk && !IS_ERR(clk))
+	if (clk && !IS_ERR(clk)) {
 		clk_prepare_enable(clk);
-	else
+		pxa_timer_common_init(irq, clk_get_rate(clk));
+	} else {
 		pr_crit("%s: unable to get clk\n", __func__);
-
-	pxa_timer_common_init(irq, clock_tick_rate);
+	}
 }

include/clocksource/pxa.h

···
 #ifndef _CLOCKSOURCE_PXA_H
 #define _CLOCKSOURCE_PXA_H
 
-extern void pxa_timer_nodt_init(int irq, void __iomem *base,
-			   unsigned long clock_tick_rate);
+extern void pxa_timer_nodt_init(int irq, void __iomem *base);
 
 #endif