linux-kernel - [PATCH 2/5] backlight: qcom-wled: Support ovp values for PMI8950

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Message-Id: <20260107-pmi8950-wled-v1-2-5e52f5caa39c@mainlining.org>
Date: Wed, 07 Jan 2026 14:31:06 +0100
From: Barnabás Czémán <barnabas.czeman@...nlining.org>
To: Lee Jones <lee@...nel.org>, Daniel Thompson <danielt@...nel.org>, 
 Jingoo Han <jingoohan1@...il.com>, Pavel Machek <pavel@...nel.org>, 
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Bjorn Andersson <andersson@...nel.org>, 
 Kiran Gunda <quic_kgunda@...cinc.com>, Helge Deller <deller@....de>, 
 Luca Weiss <luca@...aweiss.eu>, Konrad Dybcio <konradybcio@...nel.org>, 
 Eugene Lepshy <fekz115@...il.com>, Gianluca Boiano <morf3089@...il.com>, 
 Alejandro Tafalla <atafalla@...on.com>
Cc: dri-devel@...ts.freedesktop.org, linux-leds@...r.kernel.org, 
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, 
 Daniel Thompson <daniel.thompson@...aro.org>, linux-arm-msm@...r.kernel.org, 
 linux-fbdev@...r.kernel.org, Konrad Dybcio <konrad.dybcio@....qualcomm.com>, 
 Barnabás Czémán <barnabas.czeman@...nlining.org>
Subject: [PATCH 2/5] backlight: qcom-wled: Support ovp values for PMI8950

WLED4 found in PMI8950 supports different ovp values.

Fixes: 10258bf4534bf ("backlight: qcom-wled: Add PMI8950 compatible")
Signed-off-by: Barnabás Czémán <barnabas.czeman@...nlining.org>
---
 drivers/video/backlight/qcom-wled.c | 41 +++++++++++++++++++++++++++++++++++--
 1 file changed, 39 insertions(+), 2 deletions(-)

diff --git a/drivers/video/backlight/qcom-wled.c b/drivers/video/backlight/qcom-wled.c
index a63bb42c8f8b..91335aeb65a3 100644
--- a/drivers/video/backlight/qcom-wled.c
+++ b/drivers/video/backlight/qcom-wled.c
@@ -1244,6 +1244,15 @@ static const struct wled_var_cfg wled4_ovp_cfg = {
 	.size = ARRAY_SIZE(wled4_ovp_values),
 };
 
+static const u32 pmi8950_wled4_ovp_values[] = {
+	31000, 29500, 19400, 17800,
+};
+
+static const struct wled_var_cfg pmi8950_wled4_ovp_cfg = {
+	.values = pmi8950_wled4_ovp_values,
+	.size = ARRAY_SIZE(pmi8950_wled4_ovp_values),
+};
+
 static inline u32 wled5_ovp_values_fn(u32 idx)
 {
 	/*
@@ -1357,6 +1366,29 @@ static int wled_configure(struct wled *wled)
 		},
 	};
 
+	const struct wled_u32_opts pmi8950_wled4_opts[] = {
+		{
+			.name = "qcom,current-boost-limit",
+			.val_ptr = &cfg->boost_i_limit,
+			.cfg = &wled4_boost_i_limit_cfg,
+		},
+		{
+			.name = "qcom,current-limit-microamp",
+			.val_ptr = &cfg->string_i_limit,
+			.cfg = &wled4_string_i_limit_cfg,
+		},
+		{
+			.name = "qcom,ovp-millivolt",
+			.val_ptr = &cfg->ovp,
+			.cfg = &pmi8950_wled4_ovp_cfg,
+		},
+		{
+			.name = "qcom,switching-freq",
+			.val_ptr = &cfg->switch_freq,
+			.cfg = &wled3_switch_freq_cfg,
+		},
+	};
+
 	const struct wled_u32_opts wled5_opts[] = {
 		{
 			.name = "qcom,current-boost-limit",
@@ -1423,8 +1455,13 @@ static int wled_configure(struct wled *wled)
 		break;
 
 	case 4:
-		u32_opts = wled4_opts;
-		size = ARRAY_SIZE(wled4_opts);
+		if (of_device_is_compatible(dev->of_node, "qcom,pmi8950-wled")) {
+			u32_opts = pmi8950_wled4_opts;
+			size = ARRAY_SIZE(pmi8950_wled4_opts);
+		} else {
+			u32_opts = wled4_opts;
+			size = ARRAY_SIZE(wled4_opts);
+		}
 		*cfg = wled4_config_defaults;
 		wled->wled_set_brightness = wled4_set_brightness;
 		wled->wled_sync_toggle = wled3_sync_toggle;

-- 
2.52.0