From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 5005E30FF1D; Sat, 12 Sep 2026 09:53:57 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789206838; cv=none; b=kg+KNuhD3ehtHl/CaHpunlu+Lj7UfTALohooooqKXvq+QrglKdkmHojeXRSqlAEprEtP7feVtWkrU7kehMO7j1EykHwg/RzWv2I4Wdu+CuNCVZr+3nC6D5m4hxwddJLsnqCbPd7Fu2QAfnLRFnC7OLDAZeeQqqVh8Wz73DXi7H8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789206838; c=relaxed/simple; bh=axWTR58EChfFsAM8vDeNRyPETeSav6GCMKv1TK62JGA=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=VmG1rwTRO/y12ku5yBsrHKg9k2eZsEokhhE6Yq6nmp0rz2TbTEXTQKPORt2jZ/51D2+QAXIWqW7y3rOs60MYu1JuHaTUAgUqE7YNnku0kusdDkpKdqz8Qtvjki3VUPEbsono9mmCykjkZZXuaRpU+bue15bKhVEhwWIiFYQQAz0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=sTBTLvtV; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="sTBTLvtV" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 57F161F000FF; Sat, 12 Sep 2026 09:53:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1789206837; bh=HJhBLQySj/a3Copc65f75bsRTVtEr5045bo8R6eoX/k=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=sTBTLvtVXJyuLD2zDvAy/aW6odfKF5A1oF64tTj0vv0CEsUGllph/MXGGyStcOMAE 9BB/sLgSzeXl6hK/8keaxNy4yDqzAQcYIkbKYvPefwSne1dyXj77L3cCYW/8R46JXY mEqxTYgfuZbVJv3fgj6QDjqVQuSc5R63dYbooJEw= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Manuel Fombuena , Lee Jones , Sasha Levin Subject: [PATCH 6.18 0290/1518] leds: st1202: Fix brightness having no effect while pattern mode is active Date: Sat, 12 Sep 2026 08:40:59 +0200 Message-ID: <20260912065630.042235793@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260912065623.398859879@linuxfoundation.org> References: <20260912065623.398859879@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.18-stable review patch. If anyone has any objections, please let me know. ------------------ From: Manuel Fombuena [ Upstream commit 7cbe470366bdd43c7e8114fb2c4d74fa69093121 ] Once a hardware pattern is running (PATS=1), writing to the brightness sysfs attribute only updates the ILED register. The visible output is ILED x Pattern_PWM / 4095, so the change has little effect and the LED never returns to steady static operation as the user expects. The LED1202 has a single global sequencer shared across all channels. Stopping it in brightness_set() to force static mode would halt running patterns on all other active LEDs. Instead, set all 8 PWM slots for the channel to ST1202_PATTERN_PWM_FULL before writing ILED. With every step at full duty cycle, the output is ILED x FULL / 4095 = ILED regardless of the sequencer state, without disturbing other channels. This also enables basic LED operation without the pattern trigger: with the trigger set to none, the brightness sysfs attribute fully controls the LED as a simple on/off device. Fixes: 259230378c65 ("leds: Add LED1202 I2C driver") Signed-off-by: Manuel Fombuena Assisted-by: Claude:claude-sonnet-4-6 Link: https://patch.msgid.link/GV1PR08MB8497570FD162D0D42A9864E3C5F52@GV1PR08MB8497.eurprd08.prod.outlook.com Signed-off-by: Lee Jones Signed-off-by: Sasha Levin --- drivers/leds/leds-st1202.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/leds/leds-st1202.c b/drivers/leds/leds-st1202.c index 4627b244c12fe..680ccb4395773 100644 --- a/drivers/leds/leds-st1202.c +++ b/drivers/leds/leds-st1202.c @@ -137,6 +137,8 @@ static void st1202_brightness_set(struct led_classdev *led_cdev, guard(mutex)(&chip->lock); + for (int patt = 0; patt < ST1202_MAX_PATTERNS; patt++) + st1202_pwm_pattern_write(chip, led->led_num, patt, ST1202_PATTERN_PWM_FULL); st1202_write_reg(chip, ST1202_ILED_REG0 + led->led_num, value); } -- 2.53.0