net: ipa: introduce ipa_clock_rate()

Create a new function that returns the current rate of the IPA core
clock.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ipa/ipa_clock.c b/drivers/net/ipa/ipa_clock.c
index c5204fd..0fbc8b1 100644 (file)
--- a/drivers/net/ipa/ipa_clock.c
+++ b/drivers/net/ipa/ipa_clock.c
@@ -256,6 +256,12 @@ void ipa_clock_put(struct ipa *ipa)
        mutex_unlock(&clock->mutex);
 }
 
+/* Return the current IPA core clock rate */
+u32 ipa_clock_rate(struct ipa *ipa)
+{
+       return ipa->clock ? (u32)clk_get_rate(ipa->clock->core) : 0;
+}
+
 /* Initialize IPA clocking */
 struct ipa_clock *ipa_clock_init(struct device *dev)
 {

diff --git a/drivers/net/ipa/ipa_clock.h b/drivers/net/ipa/ipa_clock.h
index bc52b35..0f4e287 100644 (file)
--- a/drivers/net/ipa/ipa_clock.h
+++ b/drivers/net/ipa/ipa_clock.h
@@ -11,6 +11,14 @@ struct device;
 struct ipa;
 
 /**
+ * ipa_clock_rate() - Return the current IPA core clock rate
+ * @ipa:       IPA structure
+ *
+ * Return: The current clock rate (in Hz), or 0.
+ */
+u32 ipa_clock_rate(struct ipa *ipa);
+
+/**
  * ipa_clock_init() - Initialize IPA clocking
  * @dev:       IPA device
  *