clk: imx: scu: Do not enable runtime PM for CPU clks

Since CPU clocks are managed by CPUFREQ and ATF, do not enable
runtime PM otherwise rpm gets out of status as cpufreq
also manages clock states.

Signed-off-by: Nitin Garg <[email protected]>
Signed-off-by: Dong Aisheng <[email protected]>
Reviewed-by: Abel Vesa <[email protected]>
Signed-off-by: Abel Vesa <[email protected]>

Author: nitingarg98

drivers/clk/imx/clk-scu.c

@@ -521,16 +521,19 @@ static int imx_clk_scu_probe(struct platform_device *pdev)
 	struct clk_hw *hw;
 	int ret;
 
-	pm_runtime_set_suspended(dev);
-	pm_runtime_set_autosuspend_delay(dev, 50);
-	pm_runtime_use_autosuspend(&pdev->dev);
-	pm_runtime_enable(dev);
-
-	ret = pm_runtime_get_sync(dev);
-	if (ret) {
-		pm_genpd_remove_device(dev);
-		pm_runtime_disable(dev);
-		return ret;
+	if (!((clk->rsrc == IMX_SC_R_A35) || (clk->rsrc == IMX_SC_R_A53) ||
+	    (clk->rsrc == IMX_SC_R_A72))) {
+		pm_runtime_set_suspended(dev);
+		pm_runtime_set_autosuspend_delay(dev, 50);
+		pm_runtime_use_autosuspend(&pdev->dev);
+		pm_runtime_enable(dev);
+
+		ret = pm_runtime_get_sync(dev);
+		if (ret) {
+			pm_genpd_remove_device(dev);
+			pm_runtime_disable(dev);
+			return ret;
+		}
 	}
 
 	hw = __imx_clk_scu(dev, clk->name, clk->parents, clk->num_parents,
@@ -543,8 +546,11 @@ static int imx_clk_scu_probe(struct platform_device *pdev)
 	clk->hw = hw;
 	list_add_tail(&clk->node, &imx_scu_clks[clk->rsrc]);
 
-	pm_runtime_mark_last_busy(&pdev->dev);
-	pm_runtime_put_autosuspend(&pdev->dev);
+	if (!((clk->rsrc == IMX_SC_R_A35) || (clk->rsrc == IMX_SC_R_A53) ||
+	    (clk->rsrc == IMX_SC_R_A72))) {
+		pm_runtime_mark_last_busy(&pdev->dev);
+		pm_runtime_put_autosuspend(&pdev->dev);
+	}
 
 	dev_dbg(dev, "register SCU clock rsrc:%d type:%d\n", clk->rsrc,
 		clk->clk_type);