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authorDaniel Lezcano <daniel.lezcano@linaro.org>2018-01-08 14:28:45 +0100
committerIngo Molnar <mingo@kernel.org>2018-01-08 17:57:23 +0100
commitcf7f46b9b12269d204b6acd0925704543adb6e05 (patch)
treebefb382aa2123cb1cb10515226f19c68aa5d7b71 /drivers/clocksource
parent5bbf4ad945a9bb353e77ef71c753ca9bb1e3d978 (diff)
clocksource/drivers/timer-of: Add kernel documentation
The current code has no comments, neither any function descriptions. Fix this by adding function descriptions in kernel doc format. Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/1515418139-23276-6-git-send-email-daniel.lezcano@linaro.org [ Spelling and style fixes. ] Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'drivers/clocksource')
-rw-r--r--drivers/clocksource/timer-of.c37
1 files changed, 37 insertions, 0 deletions
diff --git a/drivers/clocksource/timer-of.c b/drivers/clocksource/timer-of.c
index ad5565404e25..c1045b9a787c 100644
--- a/drivers/clocksource/timer-of.c
+++ b/drivers/clocksource/timer-of.c
@@ -24,6 +24,12 @@
#include "timer-of.h"
+/**
+ * timer_of_irq_exit - Release the interrupt
+ * @of_irq: an of_timer_irq structure pointer
+ *
+ * Free the irq resource
+ */
static __init void timer_of_irq_exit(struct of_timer_irq *of_irq)
{
struct timer_of *to = container_of(of_irq, struct timer_of, of_irq);
@@ -34,6 +40,22 @@ static __init void timer_of_irq_exit(struct of_timer_irq *of_irq)
free_irq(of_irq->irq, clkevt);
}
+/**
+ * timer_of_irq_init - Request the interrupt
+ * @np: a device tree node pointer
+ * @of_irq: an of_timer_irq structure pointer
+ *
+ * Get the interrupt number from the DT from its definition and
+ * request it. The interrupt is gotten by falling back the following way:
+ *
+ * - Get interrupt number by name
+ * - Get interrupt number by index
+ *
+ * When the interrupt is per CPU, 'request_percpu_irq()' is called,
+ * otherwise 'request_irq()' is used.
+ *
+ * Returns 0 on success, < 0 otherwise
+ */
static __init int timer_of_irq_init(struct device_node *np,
struct of_timer_irq *of_irq)
{
@@ -72,6 +94,12 @@ static __init int timer_of_irq_init(struct device_node *np,
return 0;
}
+/**
+ * timer_of_clk_exit - Release the clock resources
+ * @of_clk: a of_timer_clk structure pointer
+ *
+ * Disables and releases the refcount on the clk
+ */
static __init void timer_of_clk_exit(struct of_timer_clk *of_clk)
{
of_clk->rate = 0;
@@ -79,6 +107,15 @@ static __init void timer_of_clk_exit(struct of_timer_clk *of_clk)
clk_put(of_clk->clk);
}
+/**
+ * timer_of_clk_init - Initialize the clock resources
+ * @np: a device tree node pointer
+ * @of_clk: a of_timer_clk structure pointer
+ *
+ * Get the clock by name or by index, enable it and get the rate
+ *
+ * Returns 0 on success, < 0 otherwise
+ */
static __init int timer_of_clk_init(struct device_node *np,
struct of_timer_clk *of_clk)
{