[PATCH 6.6 250/283] backlight: qcom-wled: Support ovp values for PMI8994

Sasha Levin
2026-02-28T18:10:39Z

From: Barnabás Czémán <barnabas.czeman@mainlining.org>

[ Upstream commit f29f972a6e7e3f187ea4d89b98a76c1981ca4d53 ]

WLED4 found in PMI8994 supports different ovp values.

Fixes: 6fc632d3e3e0 ("video: backlight: qcom-wled: Add PMI8994 compatible")
Signed-off-by: Barnabás Czémán <barnabas.czeman@mainlining.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Reviewed-by: Daniel Thompson (RISCstar) <danielt@kernel.org>
Link: https://patch.msgid.link/20260116-pmi8950-wled-v3-2-e6c93de84079@mainlining.org
Signed-off-by: Lee Jones <lee@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.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 b19e5f73de8bb..79337e84069fb 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 pmi8994_wled_ovp_values[] = {
+ 31000, 29500, 19400, 17800,
+};
+
+static const struct wled_var_cfg pmi8994_wled_ovp_cfg = {
+ .values = pmi8994_wled_ovp_values,
+ .size = ARRAY_SIZE(pmi8994_wled_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 pmi8994_wled_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 = &pmi8994_wled_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,pmi8994-wled")) {
+ u32_opts = pmi8994_wled_opts;
+ size = ARRAY_SIZE(pmi8994_wled_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;
--
2.51.0