diff mbox series

[v2,2/2] drm/omap/dss: Use syscon_regmap_lookup_by_phandle_args

Message ID 20250114145840.505459-2-krzysztof.kozlowski@linaro.org (mailing list archive)
State New
Headers show
Series [v2,1/2] drm/omap/dss: Use of_property_present() to test existence of DT property | expand

Commit Message

Krzysztof Kozlowski Jan. 14, 2025, 2:58 p.m. UTC 
Use syscon_regmap_lookup_by_phandle_args() which is a wrapper over
syscon_regmap_lookup_by_phandle() combined with getting the syscon
argument.  Except simpler code this annotates within one line that given
phandle has arguments, so grepping for code would be easier.

There is also no real benefit in printing errors on missing syscon
argument, because this is done just too late: runtime check on
static/build-time data.  Dtschema and Devicetree bindings offer the
static/build-time check for this already.

Reviewed-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>

---

Changes in v2:
1. Split of_property_present into previous patch.
2. Add tag.
---
 drivers/gpu/drm/omapdrm/dss/dss.c | 12 +++---------
 1 file changed, 3 insertions(+), 9 deletions(-)
diff mbox series

Patch

diff --git a/drivers/gpu/drm/omapdrm/dss/dss.c b/drivers/gpu/drm/omapdrm/dss/dss.c
index 319f0a1d23a7..692df747e2ae 100644
--- a/drivers/gpu/drm/omapdrm/dss/dss.c
+++ b/drivers/gpu/drm/omapdrm/dss/dss.c
@@ -1237,20 +1237,14 @@  static int dss_video_pll_probe(struct dss_device *dss)
 		return 0;
 
 	if (of_property_present(np, "syscon-pll-ctrl")) {
-		dss->syscon_pll_ctrl = syscon_regmap_lookup_by_phandle(np,
-			"syscon-pll-ctrl");
+		dss->syscon_pll_ctrl =
+			syscon_regmap_lookup_by_phandle_args(np, "syscon-pll-ctrl",
+							     1, &dss->syscon_pll_ctrl_offset);
 		if (IS_ERR(dss->syscon_pll_ctrl)) {
 			dev_err(&pdev->dev,
 				"failed to get syscon-pll-ctrl regmap\n");
 			return PTR_ERR(dss->syscon_pll_ctrl);
 		}
-
-		if (of_property_read_u32_index(np, "syscon-pll-ctrl", 1,
-				&dss->syscon_pll_ctrl_offset)) {
-			dev_err(&pdev->dev,
-				"failed to get syscon-pll-ctrl offset\n");
-			return -EINVAL;
-		}
 	}
 
 	pll_regulator = devm_regulator_get(&pdev->dev, "vdda_video");