clk: renesas: rzg2l: Add multi clock PM support

Add multi clock PM support for cpg driver.

Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Link: https://lore.kernel.org/r/20210626081344.5783-2-biju.das.jz@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

Author: bijudas

drivers/clk/renesas/renesas-rzg2l-cpg.c

@@ -594,42 +594,49 @@ static int rzg2l_cpg_attach_dev(struct generic_pm_domain *unused, struct device
 {
 	struct device_node *np = dev->of_node;
 	struct of_phandle_args clkspec;
+	bool once = true;
 	struct clk *clk;
 	int error;
 	int i = 0;
 
 	while (!of_parse_phandle_with_args(np, "clocks", "#clock-cells", i,
 					   &clkspec)) {
-		if (rzg2l_cpg_is_pm_clk(&clkspec))
-			goto found;
-
-		of_node_put(clkspec.np);
+		if (rzg2l_cpg_is_pm_clk(&clkspec)) {
+			if (once) {
+				once = false;
+				error = pm_clk_create(dev);
+				if (error) {
+					of_node_put(clkspec.np);
+					goto err;
+				}
+			}
+			clk = of_clk_get_from_provider(&clkspec);
+			of_node_put(clkspec.np);
+			if (IS_ERR(clk)) {
+				error = PTR_ERR(clk);
+				goto fail_destroy;
+			}
+
+			error = pm_clk_add_clk(dev, clk);
+			if (error) {
+				dev_err(dev, "pm_clk_add_clk failed %d\n",
+					error);
+				goto fail_put;
+			}
+		} else {
+			of_node_put(clkspec.np);
+		}
 		i++;
 	}
 
 	return 0;
 
-found:
-	clk = of_clk_get_from_provider(&clkspec);
-	of_node_put(clkspec.np);
-
-	if (IS_ERR(clk))
-		return PTR_ERR(clk);
-
-	error = pm_clk_create(dev);
-	if (error)
-		goto fail_put;
-
-	error = pm_clk_add_clk(dev, clk);
-	if (error)
-		goto fail_destroy;
-
-	return 0;
+fail_put:
+	clk_put(clk);
 
 fail_destroy:
 	pm_clk_destroy(dev);
-fail_put:
-	clk_put(clk);
+err:
 	return error;
 }