netdev - [PATCH net-next 1/2] net: ipa: introduce ipa_clock

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Message-Id: <20200703212335.465355-2-elder@linaro.org>
Date:   Fri,  3 Jul 2020 16:23:34 -0500
From:   Alex Elder <elder@...aro.org>
To:     davem@...emloft.net, kuba@...nel.org
Cc:     evgreen@...omium.org, subashab@...eaurora.org,
        cpratapa@...eaurora.org, bjorn.andersson@...aro.org,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH net-next 1/2] 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@...aro.org>
---
 drivers/net/ipa/ipa_clock.c | 6 ++++++
 drivers/net/ipa/ipa_clock.h | 8 ++++++++
 2 files changed, 14 insertions(+)

diff --git a/drivers/net/ipa/ipa_clock.c b/drivers/net/ipa/ipa_clock.c
index c5204fd58ac4..0fbc8b1bdf41 100644
--- 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 bc52b35e6bb2..0f4e2877a6df 100644
--- a/drivers/net/ipa/ipa_clock.h
+++ b/drivers/net/ipa/ipa_clock.h
@@ -10,6 +10,14 @@ 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
-- 
2.25.1