i2c: mv64xxx: use clk_{prepare_enable,disable_unprepare}

Instead of separately calling clk_prepare()/clk_enable(), use
clk_prepare_enable(), and instead of calling
clk_disable()/clk_unprepare(), use clk_disable_unprepare(). Those
handy shortcuts have been introduced specifically to simplify the
numerous call sites were both functions were called in sequence.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>

drivers/i2c/busses/i2c-mv64xxx.c

@@ -912,10 +912,8 @@ mv64xxx_i2c_probe(struct platform_device *pd)
 	drv_data->clk = devm_clk_get(&pd->dev, NULL);
 	if (IS_ERR(drv_data->clk) && PTR_ERR(drv_data->clk) == -EPROBE_DEFER)
 		return -EPROBE_DEFER;
-	if (!IS_ERR(drv_data->clk)) {
+	if (!IS_ERR(drv_data->clk))
-		clk_prepare(drv_data->clk);
+		clk_prepare_enable(drv_data->clk);
-		clk_enable(drv_data->clk);
-	}
 #endif
 	if (pdata) {
 		drv_data->freq_m = pdata->freq_m;
@@ -968,10 +966,8 @@ exit_reset:
 exit_clk:
 #if defined(CONFIG_HAVE_CLK)
 	/* Not all platforms have a clk */
-	if (!IS_ERR(drv_data->clk)) {
+	if (!IS_ERR(drv_data->clk))
-		clk_disable(drv_data->clk);
+		clk_disable_unprepare(drv_data->clk);
-		clk_unprepare(drv_data->clk);
-	}
 #endif
 	return rc;
 }
@@ -987,10 +983,8 @@ mv64xxx_i2c_remove(struct platform_device *dev)
 		reset_control_assert(drv_data->rstc);
 #if defined(CONFIG_HAVE_CLK)
 	/* Not all platforms have a clk */
-	if (!IS_ERR(drv_data->clk)) {
+	if (!IS_ERR(drv_data->clk))
-		clk_disable(drv_data->clk);
+		clk_disable_unprepare(drv_data->clk);
-		clk_unprepare(drv_data->clk);
-	}
 #endif
 
 	return 0;