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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 <robert.jarzmik@free.fr>
Acked-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Acked-by: Russell King <rmk+kernel@armlinux.org.uk>
zero-colors
Robert Jarzmik 2016-09-19 21:12:13 +02:00
parent a758c9b93f
commit f4e14edf25
4 changed files with 8 additions and 11 deletions
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3
arch/arm/mach-pxa/generic.c
View File

@ -69,8 +69,7 @@ void __init pxa_timer_init(void)
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));
}
/*

2
arch/arm/mach-sa1100/generic.c
View File

@ -378,7 +378,7 @@ void __init sa1100_map_io(void)
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 =

11
drivers/clocksource/pxa_timer.c
View File

@ -220,17 +220,16 @@ CLOCKSOURCE_OF_DECLARE(pxa_timer, "marvell,pxa-timer", pxa_timer_dt_init);
/*
* 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);
}
}

3
include/clocksource/pxa.h
View File

@ -12,7 +12,6 @@
#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