From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 E73591482E1; Wed, 7 Feb 2024 21:23:52 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1707341033; cv=none; b=tw17iZb1Yz1FwhEOEioFVxE9FdSE+q0OI2COeHCPc3HtJvFBYGjzY6Ykdyn7CUrK8LIHXG/c+ElSUEUaeHjxKQxCRO0qOODEIOS8r6sor1EXOuvMtXY2gypzy+acAduBex6/4aT0oZAMGYWIcDZCRF/bWRkMZFbjCCwVZxytUvc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1707341033; c=relaxed/simple; bh=Mm3e95LkaV2hy4cIxnxWGZtSOC8VaDRa3rPB5PdYfco=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=miAxJFXKAC0gd/gtQEAERm8ic+km6V5XJH0GO+jhRIGUvYcXh6C0WpCmI/e7TSJUssyATlRezDVxJMsoAWVLRSemcq0D1AWPHP9HmsOf+fQbd/AYxwpcViiX1N2N0vi8f80onoFybYu21ai5DVmdlabalAQyZa1n6f9Ctn8XDgE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=tmz6NPvt; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="tmz6NPvt" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5E1CBC43399; Wed, 7 Feb 2024 21:23:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1707341032; bh=Mm3e95LkaV2hy4cIxnxWGZtSOC8VaDRa3rPB5PdYfco=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=tmz6NPvtPPEHoOJG8iVI8JDHyl6UsyM8+zjH9JPaXIm3wlKAcPeViKbFYlDss7pxG 9BgaozA1VfYlUn2ZyWTFaA440j+kSVGSrjHk5gDiHkc95Nsz+mBSl9emeNvmr+G9cw YPRSyGsZdLWyCqK90RrljlgABZuDxvFxtiMtAm8ZzhMYaljibd1POqTw5nhNcniNQK 7qGNrjw/eD3hlzUeq+mZV6dsyU3bTE4pqal2358jgaXumIQkTqa7YQpVtMh9ZSfpYN 5iEKWQKWjrg1d6mZjZO/ersKb23bESC3e8HMWnPhLV+Chv+lgXzegFHrpFCiNTGWLr CIKu0Xadx2HWg== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Martin Blumenstingl , =?UTF-8?q?Uwe=20Kleine-K=C3=B6nig?= , Mark Brown , Sasha Levin , lgirdwood@gmail.com Subject: [PATCH AUTOSEL 6.6 08/38] regulator: pwm-regulator: Add validity checks in continuous .get_voltage Date: Wed, 7 Feb 2024 16:22:54 -0500 Message-ID: <20240207212337.2351-8-sashal@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240207212337.2351-1-sashal@kernel.org> References: <20240207212337.2351-1-sashal@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 X-stable: review X-Patchwork-Hint: Ignore X-stable-base: Linux 6.6.16 Content-Transfer-Encoding: 8bit From: Martin Blumenstingl [ Upstream commit c92688cac239794e4a1d976afa5203a4d3a2ac0e ] Continuous regulators can be configured to operate only in a certain duty cycle range (for example from 0..91%). Add a check to error out if the duty cycle translates to an unsupported (or out of range) voltage. Suggested-by: Uwe Kleine-König Signed-off-by: Martin Blumenstingl Link: https://msgid.link/r/20240113224628.377993-2-martin.blumenstingl@googlemail.com Signed-off-by: Mark Brown Signed-off-by: Sasha Levin --- drivers/regulator/pwm-regulator.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/regulator/pwm-regulator.c b/drivers/regulator/pwm-regulator.c index 2aff6db748e2..e33d10df7a76 100644 --- a/drivers/regulator/pwm-regulator.c +++ b/drivers/regulator/pwm-regulator.c @@ -158,6 +158,9 @@ static int pwm_regulator_get_voltage(struct regulator_dev *rdev) pwm_get_state(drvdata->pwm, &pstate); voltage = pwm_get_relative_duty_cycle(&pstate, duty_unit); + if (voltage < min(max_uV_duty, min_uV_duty) || + voltage > max(max_uV_duty, min_uV_duty)) + return -ENOTRECOVERABLE; /* * The dutycycle for min_uV might be greater than the one for max_uV. -- 2.43.0