diff mbox series

[RFC,v5,02/14] i2c: tegra: Remove NULL pointer check before clk_enable/disable/prepare/unprepare

Message ID 1595883452-17343-3-git-send-email-skomatineni@nvidia.com
State Changes Requested
Headers show
Series Support for Tegra video capture from external sensor | expand

Commit Message

Sowjanya Komatineni July 27, 2020, 8:57 p.m. UTC 
clk_enable, clk_disable, clk_prepare, and clk_unprepare APIs have
implementation for checking clk pointer not NULL and clock consumers
can safely call these APIs without NULL pointer check.

So, this patch cleans up Tegra i2c driver to remove explicit checks
before these APIs.

Reviewed-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Sowjanya Komatineni <skomatineni@nvidia.com>
---
 drivers/i2c/busses/i2c-tegra.c | 64 +++++++++++++++---------------------------
 1 file changed, 23 insertions(+), 41 deletions(-)

Comments

Wolfram Sang July 28, 2020, 4:33 p.m. UTC | #1 
On Mon, Jul 27, 2020 at 01:57:20PM -0700, Sowjanya Komatineni wrote:
> clk_enable, clk_disable, clk_prepare, and clk_unprepare APIs have
> implementation for checking clk pointer not NULL and clock consumers
> can safely call these APIs without NULL pointer check.
> 
> So, this patch cleans up Tegra i2c driver to remove explicit checks
> before these APIs.
> 
> Reviewed-by: Dmitry Osipenko <digetx@gmail.com>
> Signed-off-by: Sowjanya Komatineni <skomatineni@nvidia.com>

Applied to for-next, thanks!
diff mbox series

Patch

diff --git a/drivers/i2c/busses/i2c-tegra.c b/drivers/i2c/busses/i2c-tegra.c
index 3be1018..c91307b9 100644
--- a/drivers/i2c/busses/i2c-tegra.c
+++ b/drivers/i2c/busses/i2c-tegra.c
@@ -655,21 +655,17 @@  static int __maybe_unused tegra_i2c_runtime_resume(struct device *dev)
 	if (ret)
 		return ret;
 
-	if (!i2c_dev->hw->has_single_clk_source) {
-		ret = clk_enable(i2c_dev->fast_clk);
-		if (ret < 0) {
-			dev_err(i2c_dev->dev,
-				"Enabling fast clk failed, err %d\n", ret);
-			return ret;
-		}
+	ret = clk_enable(i2c_dev->fast_clk);
+	if (ret < 0) {
+		dev_err(i2c_dev->dev,
+			"Enabling fast clk failed, err %d\n", ret);
+		return ret;
 	}
 
-	if (i2c_dev->slow_clk) {
-		ret = clk_enable(i2c_dev->slow_clk);
-		if (ret < 0) {
-			dev_err(dev, "failed to enable slow clock: %d\n", ret);
-			return ret;
-		}
+	ret = clk_enable(i2c_dev->slow_clk);
+	if (ret < 0) {
+		dev_err(dev, "failed to enable slow clock: %d\n", ret);
+		return ret;
 	}
 
 	ret = clk_enable(i2c_dev->div_clk);
@@ -688,12 +684,8 @@  static int __maybe_unused tegra_i2c_runtime_suspend(struct device *dev)
 	struct tegra_i2c_dev *i2c_dev = dev_get_drvdata(dev);
 
 	clk_disable(i2c_dev->div_clk);
-
-	if (i2c_dev->slow_clk)
-		clk_disable(i2c_dev->slow_clk);
-
-	if (!i2c_dev->hw->has_single_clk_source)
-		clk_disable(i2c_dev->fast_clk);
+	clk_disable(i2c_dev->slow_clk);
+	clk_disable(i2c_dev->fast_clk);
 
 	return pinctrl_pm_select_idle_state(i2c_dev->dev);
 }
@@ -1716,20 +1708,16 @@  static int tegra_i2c_probe(struct platform_device *pdev)
 
 	platform_set_drvdata(pdev, i2c_dev);
 
-	if (!i2c_dev->hw->has_single_clk_source) {
-		ret = clk_prepare(i2c_dev->fast_clk);
-		if (ret < 0) {
-			dev_err(i2c_dev->dev, "Clock prepare failed %d\n", ret);
-			return ret;
-		}
+	ret = clk_prepare(i2c_dev->fast_clk);
+	if (ret < 0) {
+		dev_err(i2c_dev->dev, "Clock prepare failed %d\n", ret);
+		return ret;
 	}
 
-	if (i2c_dev->slow_clk) {
-		ret = clk_prepare(i2c_dev->slow_clk);
-		if (ret < 0) {
-			dev_err(dev, "failed to prepare slow clock: %d\n", ret);
-			goto unprepare_fast_clk;
-		}
+	ret = clk_prepare(i2c_dev->slow_clk);
+	if (ret < 0) {
+		dev_err(dev, "failed to prepare slow clock: %d\n", ret);
+		goto unprepare_fast_clk;
 	}
 
 	if (i2c_dev->bus_clk_rate > I2C_MAX_FAST_MODE_FREQ &&
@@ -1843,12 +1831,10 @@  static int tegra_i2c_probe(struct platform_device *pdev)
 	clk_unprepare(i2c_dev->div_clk);
 
 unprepare_slow_clk:
-	if (i2c_dev->is_vi)
-		clk_unprepare(i2c_dev->slow_clk);
+	clk_unprepare(i2c_dev->slow_clk);
 
 unprepare_fast_clk:
-	if (!i2c_dev->hw->has_single_clk_source)
-		clk_unprepare(i2c_dev->fast_clk);
+	clk_unprepare(i2c_dev->fast_clk);
 
 	return ret;
 }
@@ -1867,12 +1853,8 @@  static int tegra_i2c_remove(struct platform_device *pdev)
 		tegra_i2c_runtime_suspend(&pdev->dev);
 
 	clk_unprepare(i2c_dev->div_clk);
-
-	if (i2c_dev->slow_clk)
-		clk_unprepare(i2c_dev->slow_clk);
-
-	if (!i2c_dev->hw->has_single_clk_source)
-		clk_unprepare(i2c_dev->fast_clk);
+	clk_unprepare(i2c_dev->slow_clk);
+	clk_unprepare(i2c_dev->fast_clk);
 
 	tegra_i2c_release_dma(i2c_dev);
 	return 0;