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Message-ID: <20130426213723.GA24891@amd.pavel.ucw.cz>
Date: Fri, 26 Apr 2013 23:37:23 +0200
From: Pavel Machek <pavel@...x.de>
To: Jamie Iles <jamie@...ieiles.com>
Cc: dinguyen@...era.com, wd@...x.de,
linux-arm-kernel@...ts.infradead.org, olof@...om.net,
arnd@...db.de, johnstul@...ibm.com, tglx@...utronix.de,
kernel list <linux-kernel@...r.kernel.org>
Subject: Re: dw_apb_timer_of.c: remove parts that were picoxcell-specific
Hi!
> On Fri, Apr 26, 2013 at 02:14:34PM +0200, Pavel Machek wrote:
> > diff --git a/arch/arm/mach-picoxcell/common.c b/arch/arm/mach-picoxcell/common.c
> > index 70b441a..22759f5 100644
> > --- a/arch/arm/mach-picoxcell/common.c
> > +++ b/arch/arm/mach-picoxcell/common.c
> > @@ -84,11 +84,39 @@ static void picoxcell_wdt_restart(char mode, const char *cmd)
> > }
> > }
> >
> > +static const struct of_device_id picochip_rtc_ids[] __initconst = {
> > + { .compatible = "picochip,pc3x2-rtc" },
> > + { /* Sentinel */ },
> > +};
> > +
> > +static void __iomem *sched_io_base;
> > +
> > +static u32 read_sched_clock(void)
> > +{
> > + return __raw_readl(sched_io_base);
> > +}
> > +
> > +static void __init timer_init(void)
> > +{
> > + u32 rate;
> > +
> > + dw_apb_timer_init(0);
> > +
> > + sched_timer = of_find_matching_node(timer, osctimer_ids);
> > + if (!sched_timer)
> > + panic("No suitable timer for scheduler clock\n");
> > +
> > + timer_get_base_and_rate(sched_timer, &sched_io_base, &rate);
> > + of_node_put(sched_timer);
>
> This doesn't work as osctimer_ids is private to the dw_apb_timer files
> as is timer_get_base_and_rate. The other timer is unused in picoxcell
> though so dw_apb_timer_init(1), something like the patch below on top of
> yours.
That would still not compile due to common.h. ... _but_ it allows
some very nice simplification, with this on top:
I'll post merged-up patch in next mail.
Thanks,
Pavel
diff --git a/arch/arm/mach-picoxcell/common.c b/arch/arm/mach-picoxcell/common.c
index c027920..70b441a 100644
--- a/arch/arm/mach-picoxcell/common.c
+++ b/arch/arm/mach-picoxcell/common.c
@@ -84,16 +84,11 @@ static void picoxcell_wdt_restart(char mode, const char *cmd)
}
}
-static void __init timer_init(void)
-{
- dw_apb_timer_init(1);
-}
-
DT_MACHINE_START(PICOXCELL, "Picochip picoXcell")
.map_io = picoxcell_map_io,
.nr_irqs = NR_IRQS_LEGACY,
.init_irq = irqchip_init,
- .init_time = timer_init,
+ .init_time = dw_apb_timer_init,
.init_machine = picoxcell_init_machine,
.dt_compat = picoxcell_dt_match,
.restart = picoxcell_wdt_restart,
diff --git a/arch/arm/mach-picoxcell/common.h b/arch/arm/mach-picoxcell/common.h
index 481b42a..237fb3b 100644
--- a/arch/arm/mach-picoxcell/common.h
+++ b/arch/arm/mach-picoxcell/common.h
@@ -12,6 +12,4 @@
#include <asm/mach/time.h>
-extern void dw_apb_timer_init(void);
-
#endif /* __PICOXCELL_COMMON_H__ */
diff --git a/arch/arm/mach-socfpga/socfpga.c b/arch/arm/mach-socfpga/socfpga.c
index 6efbc12..81b8f1e 100644
--- a/arch/arm/mach-socfpga/socfpga.c
+++ b/arch/arm/mach-socfpga/socfpga.c
@@ -110,17 +110,11 @@ static const char *altera_dt_match[] = {
NULL
};
-static void __init timer_init(void)
-{
- dw_apb_timer_init(1);
-}
-
-
DT_MACHINE_START(SOCFPGA, "Altera SOCFPGA")
.smp = smp_ops(socfpga_smp_ops),
.map_io = socfpga_map_io,
.init_irq = socfpga_init_irq,
- .init_time = timer_init,
+ .init_time = dw_apb_timer_init,
.init_machine = socfpga_cyclone5_init,
.restart = socfpga_cyclone5_restart,
.dt_compat = altera_dt_match,
diff --git a/drivers/clocksource/dw_apb_timer_of.c b/drivers/clocksource/dw_apb_timer_of.c
index 872ce66..0fa3104 100644
--- a/drivers/clocksource/dw_apb_timer_of.c
+++ b/drivers/clocksource/dw_apb_timer_of.c
@@ -66,7 +66,7 @@ static u32 read_sched_clock_sptimer(void)
return ~__raw_readl(sched_io_base + APBTMR_N_CURRENT_VALUE);
}
-static void add_clocksource(struct device_node *source_timer, int use_as_scheduler)
+static void add_clocksource(struct device_node *source_timer)
{
void __iomem *iobase;
struct dw_apb_clocksource *cs;
@@ -81,10 +81,8 @@ static void add_clocksource(struct device_node *source_timer, int use_as_schedul
dw_apb_clocksource_start(cs);
dw_apb_clocksource_register(cs);
- if (use_as_scheduler) {
- sched_io_base = iobase;
- setup_sched_clock(read_sched_clock_sptimer, 32, rate);
- }
+ sched_io_base = iobase;
+ setup_sched_clock(read_sched_clock_sptimer, 32, rate);
}
static const struct of_device_id osctimer_ids[] __initconst = {
@@ -104,7 +102,7 @@ static const struct of_device_id osctimer_ids[] __initconst = {
*/
-void __init dw_apb_timer_init(int use_as_scheduler)
+void __init dw_apb_timer_init(void)
{
struct device_node *event_timer, *source_timer;
@@ -116,7 +114,7 @@ void __init dw_apb_timer_init(int use_as_scheduler)
source_timer = of_find_matching_node(event_timer, osctimer_ids);
if (!source_timer)
panic("No timer for clocksource");
- add_clocksource(source_timer, use_as_scheduler);
+ add_clocksource(source_timer);
of_node_put(event_timer);
of_node_put(source_timer);
diff --git a/include/linux/dw_apb_timer.h b/include/linux/dw_apb_timer.h
index d503245..a64c987 100644
--- a/include/linux/dw_apb_timer.h
+++ b/include/linux/dw_apb_timer.h
@@ -59,5 +59,5 @@ void dw_apb_clocksource_start(struct dw_apb_clocksource *dw_cs);
cycle_t dw_apb_clocksource_read(struct dw_apb_clocksource *dw_cs);
void dw_apb_clocksource_unregister(struct dw_apb_clocksource *dw_cs);
-extern void dw_apb_timer_init(int);
+extern void dw_apb_timer_init(void);
#endif /* __DW_APB_TIMER_H__ */
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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