clk: imx: clk-imx8qxp-lpcg: add runtime pm support

add runtime pm support
Reviewed-by: Stephen Boyd <sboyd@kernel.org>
Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

drivers/clk/imx/clk-imx8qxp-lpcg.c

@@ -12,6 +12,7 @@
 #include <linux/of_address.h>
 #include <linux/of_device.h>
 #include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
 #include <linux/slab.h>
 
 #include "clk-scu.h"
@@ -239,6 +240,12 @@ static int imx_lpcg_parse_clks_from_dt(struct platform_device *pdev,
 		return -EINVAL;
 	}
 
+	pm_runtime_get_noresume(&pdev->dev);
+	pm_runtime_set_active(&pdev->dev);
+	pm_runtime_set_autosuspend_delay(&pdev->dev, 500);
+	pm_runtime_use_autosuspend(&pdev->dev);
+	pm_runtime_enable(&pdev->dev);
+
 	for (i = 0; i < count; i++) {
 		idx = bit_offset[i] / 4;
 		if (idx > IMX_LPCG_MAX_CLKS) {
@@ -248,9 +255,9 @@ static int imx_lpcg_parse_clks_from_dt(struct platform_device *pdev,
 			goto unreg;
 		}
 
-		clk_hws[idx] = imx_clk_lpcg_scu(output_names[i],
-						parent_names[i], 0, base,
-						bit_offset[i], false);
+		clk_hws[idx] = imx_clk_lpcg_scu_dev(&pdev->dev, output_names[i],
+						    parent_names[i], 0, base,
+						    bit_offset[i], false);
 		if (IS_ERR(clk_hws[idx])) {
 			dev_warn(&pdev->dev, "failed to register clock %d\n",
 				 idx);
@@ -261,8 +268,13 @@ static int imx_lpcg_parse_clks_from_dt(struct platform_device *pdev,
 
 	ret = devm_of_clk_add_hw_provider(&pdev->dev, imx_lpcg_of_clk_src_get,
 					  clk_data);
-	if (!ret)
-		return 0;
+	if (ret)
+		goto unreg;
+
+	pm_runtime_mark_last_busy(&pdev->dev);
+	pm_runtime_put_autosuspend(&pdev->dev);
+
+	return 0;
 
 unreg:
 	while (--i >= 0) {
@@ -271,6 +283,8 @@ static int imx_lpcg_parse_clks_from_dt(struct platform_device *pdev,
 			imx_clk_lpcg_scu_unregister(clk_hws[idx]);
 	}
 
+	pm_runtime_disable(&pdev->dev);
+
 	return ret;
 }