[V5,10/11] clk: imx: clk-imx8qxp-lpcg: add runtime pm support

Commit Message

Aisheng Dong Sept. 10, 2019, 2:10 a.m. UTC

add runtime pm support

Signed-off-by: Dong Aisheng <[e-mail]>
---
ChangeLog:
v4->v5:
 * no changes
v3->v4:
 * disable rpm when error out
v3: new patch
---
 drivers/clk/imx/clk-imx8qxp-lpcg.c | 34 +++++++++++++++++++++++++++-------
 1 file changed, 27 insertions(+), 7 deletions(-)

Patch

diff --git a/drivers/clk/imx/clk-imx8qxp-lpcg.c b/drivers/clk/imx/clk-imx8qxp-lpcg.c
index 31efc7a..f395eb5 100644
--- a/drivers/clk/imx/clk-imx8qxp-lpcg.c
+++ b/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"
@@ -231,26 +232,45 @@  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) {
 			dev_warn(&pdev->dev, "invalid bit offset of clock %d\n",
 				 i);
-			return -EINVAL;
+			ret = -EINVAL;
+			goto out;
 		}
 
-		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);
-			return -EINVAL;
+			ret = -EINVAL;
+			goto out;
 		}
 	}
 
-	return devm_of_clk_add_hw_provider(&pdev->dev, imx_lpcg_of_clk_src_get,
-					   clk_data);
+	ret = devm_of_clk_add_hw_provider(&pdev->dev, imx_lpcg_of_clk_src_get,
+					  clk_data);
+	if (ret)
+		goto out;
+
+	pm_runtime_mark_last_busy(&pdev->dev);
+	pm_runtime_put_autosuspend(&pdev->dev);
+
+	return 0;
+
+out:
+	pm_runtime_disable(&pdev->dev);
+	return ret;
 }
 
 static int imx8qxp_lpcg_clk_probe(struct platform_device *pdev)