[PATCH v3 03/19] PM / devfreq: rockchip-dfi: Make pmu regmap mandatory

[Sascha Hauer <s.hauer@pengutronix.de>]

As a matter of fact the regmap_pmu already is mandatory because
it is used unconditionally in the driver. Bail out gracefully in
probe() rather than crashing later.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
 drivers/devfreq/event/rockchip-dfi.c | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/drivers/devfreq/event/rockchip-dfi.c b/drivers/devfreq/event/rockchip-dfi.c
index 98712ac68aa5f..47cc9e48dafab 100644
--- a/drivers/devfreq/event/rockchip-dfi.c
+++ b/drivers/devfreq/event/rockchip-dfi.c
@@ -193,14 +193,14 @@ static int rockchip_dfi_probe(struct platform_device *pdev)
 		return dev_err_probe(dev, PTR_ERR(dfi->clk),
 				     "Cannot get the clk pclk_ddr_mon\n");
 
-	/* try to find the optional reference to the pmu syscon */
 	node = of_parse_phandle(np, "rockchip,pmu", 0);
-	if (node) {
-		dfi->regmap_pmu = syscon_node_to_regmap(node);
-		of_node_put(node);
-		if (IS_ERR(dfi->regmap_pmu))
-			return PTR_ERR(dfi->regmap_pmu);
-	}
+	if (!node)
+		return dev_err_probe(&pdev->dev, -ENODEV, "Can't find pmu_grf registers\n");
+
+	dfi->regmap_pmu = syscon_node_to_regmap(node);
+	if (IS_ERR(dfi->regmap_pmu))
+		return PTR_ERR(dfi->regmap_pmu);
+
 	dfi->dev = dev;
 
 	desc = &dfi->desc;
-- 
2.30.2