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ARM: OMAP2+: Simplify dmtimer clock aliases

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The OMAP dmtimer driver allows you to dynamically configure the functional
clock that drives the timer logic. The dmtimer driver uses the device name and
a "con-id" string to search for the appropriate functional clock.

Currently, we define a clock alias for each functional clock source each timer
supports. Some functional clock sources are common to all of the timers on a
device and so for these clock sources we can use a single alias with a unique
con-id string.

The possible functional clock sources for an OMAP device are a 32kHz clock,
a system (MHz range) clock and (for OMAP2 only) an external clock. By defining
a unique con-id name for each of these (timer_32k_ck, timer_sys_ck and
timer_ext_ck) we can eliminate a lot of the clock aliases for timers. This
reduces code, speeds-up searches and clock initialisation time.

Signed-off-by: Jon Hunter <jon-hunter@ti.com>
Acked-by: Paul Walmsley <paul@pwsan.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
This commit is contained in:
Jon Hunter
2012-06-05 12:35:00 -05:00
committed by Tony Lindgren
parent 2b2d352300
commit c59b537d87
5 changed files with 23 additions and 121 deletions
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6
arch/arm/plat-omap/dmtimer.c
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@@ -425,15 +425,15 @@ int omap_dm_timer_set_source(struct omap_dm_timer *timer, int source)
switch (source) {
case OMAP_TIMER_SRC_SYS_CLK:
parent_name = "sys_ck";
parent_name = "timer_sys_ck";
break;
case OMAP_TIMER_SRC_32_KHZ:
parent_name = "32k_ck";
parent_name = "timer_32k_ck";
break;
case OMAP_TIMER_SRC_EXT_CLK:
parent_name = "alt_ck";
parent_name = "timer_ext_ck";
break;
}