Commit 31a7448f authored by Neil Armstrong's avatar Neil Armstrong Committed by Tony Lindgren

ARM: OMAP: dmtimer: Add clock source from DT

Add a function which sets the timer source from the clocks
binding on dm_timer_prepare call.

In case the clocks property is not valid, it falls back to
the set_source() with 32_KHZ clock as default.
Suggested-by: default avatarTony Lindgren <tony@atomide.com>
Signed-off-by: default avatarNeil Armstrong <narmstrong@baylibre.com>
Signed-off-by: default avatarTony Lindgren <tony@atomide.com>
parent 1ec21837
......@@ -137,6 +137,31 @@ static int omap_dm_timer_reset(struct omap_dm_timer *timer)
return 0;
}
static int omap_dm_timer_of_set_source(struct omap_dm_timer *timer)
{
int ret;
struct clk *parent;
/*
* FIXME: OMAP1 devices do not use the clock framework for dmtimers so
* do not call clk_get() for these devices.
*/
if (!timer->fclk)
return -ENODEV;
parent = clk_get(&timer->pdev->dev, NULL);
if (IS_ERR(parent))
return -ENODEV;
ret = clk_set_parent(timer->fclk, parent);
if (ret < 0)
pr_err("%s: failed to set parent\n", __func__);
clk_put(parent);
return ret;
}
static int omap_dm_timer_prepare(struct omap_dm_timer *timer)
{
int rc;
......@@ -166,7 +191,11 @@ static int omap_dm_timer_prepare(struct omap_dm_timer *timer)
__omap_dm_timer_enable_posted(timer);
omap_dm_timer_disable(timer);
return omap_dm_timer_set_source(timer, OMAP_TIMER_SRC_32_KHZ);
rc = omap_dm_timer_of_set_source(timer);
if (rc == -ENODEV)
return omap_dm_timer_set_source(timer, OMAP_TIMER_SRC_32_KHZ);
return rc;
}
static inline u32 omap_dm_timer_reserved_systimer(int id)
......
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