memory: tegra20-emc: Use dev_pm_opp_set_clkname()

The dev_pm_opp_get_opp_table() shouldn't be used by drivers, use
dev_pm_opp_set_clkname() instead.
Suggested-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Link: https://lore.kernel.org/r/20201111011456.7875-3-digetx@gmail.comSigned-off-by: Krzysztof Kozlowski <krzk@kernel.org>

drivers/memory/tegra/tegra20-emc.c

@@ -902,7 +902,7 @@ static int tegra_emc_interconnect_init(struct tegra_emc *emc)
 
 static int tegra_emc_opp_table_init(struct tegra_emc *emc)
 {
-	struct opp_table *opp_table;
+	struct opp_table *reg_opp_table = NULL, *clk_opp_table;
 	const char *rname = "core";
 	int err;
 
@@ -917,19 +917,24 @@ static int tegra_emc_opp_table_init(struct tegra_emc *emc)
 	}
 
 	/* voltage scaling is optional */
-	if (device_property_present(emc->dev, "core-supply"))
-		opp_table = dev_pm_opp_set_regulators(emc->dev, &rname, 1);
-	else
-		opp_table = dev_pm_opp_get_opp_table(emc->dev);
+	if (device_property_present(emc->dev, "core-supply")) {
+		reg_opp_table = dev_pm_opp_set_regulators(emc->dev, &rname, 1);
+		if (IS_ERR(reg_opp_table))
+			return dev_err_probe(emc->dev, PTR_ERR(reg_opp_table),
+					     "failed to set OPP regulator\n");
+	}
 
-	if (IS_ERR(opp_table))
-		return dev_err_probe(emc->dev, PTR_ERR(opp_table),
-				     "failed to prepare OPP table\n");
+	clk_opp_table = dev_pm_opp_set_clkname(emc->dev, NULL);
+	err = PTR_ERR_OR_ZERO(clk_opp_table);
+	if (err) {
+		dev_err(emc->dev, "failed to set OPP clk: %d\n", err);
+		goto put_reg_table;
+	}
 
 	err = dev_pm_opp_of_add_table(emc->dev);
 	if (err) {
 		dev_err(emc->dev, "failed to add OPP table: %d\n", err);
-		goto put_table;
+		goto put_clk_table;
 	}
 
 	dev_info(emc->dev, "current clock rate %lu MHz\n",
@@ -946,8 +951,11 @@ static int tegra_emc_opp_table_init(struct tegra_emc *emc)
 
 remove_table:
 	dev_pm_opp_of_remove_table(emc->dev);
-put_table:
-	dev_pm_opp_put_regulators(opp_table);
+put_clk_table:
+	dev_pm_opp_put_clkname(clk_opp_table);
+put_reg_table:
+	if (reg_opp_table)
+		dev_pm_opp_put_regulators(reg_opp_table);
 
 	return err;
 }