From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 244F5C4167D for ; Mon, 23 May 2022 17:43:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S243224AbiEWRlm (ORCPT ); Mon, 23 May 2022 13:41:42 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38804 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S242445AbiEWR1n (ORCPT ); Mon, 23 May 2022 13:27:43 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 510BE7CDE7; Mon, 23 May 2022 10:23:29 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 0BF35B811FB; Mon, 23 May 2022 17:23:21 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6515BC385A9; Mon, 23 May 2022 17:23:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1653326599; bh=hKElF9otkgLbePNPxfSEj+iBFI7kjq0H8+dEpqV4T/w=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=khYrhC1az22OSCysuIXz9AfvbTsboDHQQR54swbKzGQNFlyc2cOaE2MWwg6bBx0la JYYGZEMMqaERMoUHyBOIHcS1YGZu+RHWlejzB2Unl75Ly7b6kosMlS16lCk6XtmOqz Xo4At3wKo2HGViNJsqNqGq/wX+fbw/iEQH+tnTbM= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, =?UTF-8?q?Uwe=20Kleine-K=C3=B6nig?= , Bartosz Golaszewski , Sasha Levin Subject: [PATCH 5.15 109/132] gpio: mvebu/pwm: Refuse requests with inverted polarity Date: Mon, 23 May 2022 19:05:18 +0200 Message-Id: <20220523165841.573244770@linuxfoundation.org> X-Mailer: git-send-email 2.36.1 In-Reply-To: <20220523165823.492309987@linuxfoundation.org> References: <20220523165823.492309987@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Uwe Kleine-König [ Upstream commit 3ecb10175b1f776f076553c24e2689e42953fef5 ] The driver doesn't take struct pwm_state::polarity into account when configuring the hardware, so refuse requests for inverted polarity. Fixes: 757642f9a584 ("gpio: mvebu: Add limited PWM support") Signed-off-by: Uwe Kleine-König Signed-off-by: Bartosz Golaszewski Signed-off-by: Sasha Levin --- drivers/gpio/gpio-mvebu.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/gpio/gpio-mvebu.c b/drivers/gpio/gpio-mvebu.c index ad8822da7c27..1448dc874dfc 100644 --- a/drivers/gpio/gpio-mvebu.c +++ b/drivers/gpio/gpio-mvebu.c @@ -707,6 +707,9 @@ static int mvebu_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm, unsigned long flags; unsigned int on, off; + if (state->polarity != PWM_POLARITY_NORMAL) + return -EINVAL; + val = (unsigned long long) mvpwm->clk_rate * state->duty_cycle; do_div(val, NSEC_PER_SEC); if (val > UINT_MAX + 1ULL) -- 2.35.1