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>

diff --git a/drivers/clk/imx/clk-imx8qxp-lpcg.c b/drivers/clk/imx/clk-imx8qxp-lpcg.c
index 84ac374ae8ff1ee173098532001a459555122af9..50ab66028f0b4d03b5a567eb43154186d35c336a 100644 (file)
--- 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"
@@ -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 @@ unreg:
                        imx_clk_lpcg_scu_unregister(clk_hws[idx]);
        }
 
+       pm_runtime_disable(&pdev->dev);
+
        return ret;
 }