From nobody Fri Jan 2 17:10:55 2026 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 A1564CD6136 for ; Mon, 9 Oct 2023 20:42:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1378012AbjJIUmh (ORCPT ); Mon, 9 Oct 2023 16:42:37 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56232 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1377989AbjJIUmf (ORCPT ); Mon, 9 Oct 2023 16:42:35 -0400 Received: from mail-qt1-x82d.google.com (mail-qt1-x82d.google.com [IPv6:2607:f8b0:4864:20::82d]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 35987A6 for ; Mon, 9 Oct 2023 13:42:33 -0700 (PDT) Received: by mail-qt1-x82d.google.com with SMTP id d75a77b69052e-4181e268447so32748631cf.1 for ; Mon, 09 Oct 2023 13:42:33 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=broadcom.com; s=google; t=1696884152; x=1697488952; darn=vger.kernel.org; h=mime-version:message-id:date:subject:cc:to:from:from:to:cc:subject :date:message-id:reply-to; bh=0p2br/gKqKaIyFlsV0+Ufujmkud66w1YOelpc3U/uCs=; b=Wxc6kgIbOKvBERcpiPh581goGy56tVAORXXRgRz8NokpYl9YyCZvFYTuBhDtGSfSg+ ZezLhIPe+qCKs2zFa7P6CVwBStUnSOJRtJwupQWBr0maHZqbN5e1RM/E31ITPBFv1f6N J8E0ExKdQRj2cyF3ilXsL+2uvyxsidNtyILpw= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1696884152; x=1697488952; h=mime-version:message-id:date:subject:cc:to:from:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=0p2br/gKqKaIyFlsV0+Ufujmkud66w1YOelpc3U/uCs=; b=Fu4c6VuI8iCKlGpBYorXvj35PjnHuibvUS+wfkd9wmFPO1NvplQep8uxlnLFh+uZl8 D6ommGS6vWLjYSN4Pz9vp/bOo7dYwt2++XvidUVi1kuwfwX6DTqb39q3cA6HeF5dSZ6M vGVG0xbGuUsQmpLTBxNc73wo4NR09HwAoz6nGBiJ+SvxwoQmoHhhMa+ZBxTVkD0sdZOB smZGLMnirEMKc0cyHnW5xUAGnY7UfYBQWEJ0HJkPHaLEEgsP34fQHKroHQhocE0QJrEo F/5SKwHtCnmjF5T4UKPKHy3/1iKrwOqcO8743uWgfm5JRMZ24Z6sd8suG+EShSOOuTLq OhMw== X-Gm-Message-State: AOJu0Yx9t4EHz0EqiuUcacqqwUGK0+Osv+cSPoWhBYug2d4JA/s4zKgp kqE1Vsg9Ap+nmZTypidwTX985w== X-Google-Smtp-Source: AGHT+IGitQZigQOV8jF0NpM9P7N0RQuLQO5jc3KoXDJU9IxUR/tSVv/R9LVUS1ob0426rAZpq02CGw== X-Received: by 2002:ac8:5b49:0:b0:418:bd5:f682 with SMTP id n9-20020ac85b49000000b004180bd5f682mr24003565qtw.33.1696884152308; Mon, 09 Oct 2023 13:42:32 -0700 (PDT) Received: from fainelli-desktop.igp.broadcom.net ([192.19.223.252]) by smtp.gmail.com with ESMTPSA id w7-20020ac84d07000000b0040399fb5ef3sm3973703qtv.0.2023.10.09.13.42.30 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 09 Oct 2023 13:42:31 -0700 (PDT) From: Florian Fainelli To: linux-pwm@vger.kernel.org Cc: Florian Fainelli , Angus Clark , Thierry Reding , =?UTF-8?q?Uwe=20Kleine-K=C3=B6nig?= , Broadcom internal kernel review list , Ray Jui , Scott Branden , linux-rpi-kernel@lists.infradead.org (moderated list:BROADCOM BCM2711/BCM2835 ARM ARCHITECTURE), linux-arm-kernel@lists.infradead.org (moderated list:BROADCOM BCM2711/BCM2835 ARM ARCHITECTURE), linux-kernel@vger.kernel.org (open list) Subject: [PATCH v2] pwm: bcm2835: Add support for suspend/resume Date: Mon, 9 Oct 2023 13:42:26 -0700 Message-Id: <20231009204226.3224521-1-florian.fainelli@broadcom.com> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha-256; boundary="00000000000023830a06074ea14d" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --00000000000023830a06074ea14d Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Similar to other drivers, we need to make sure that the clock is disabled during suspend and re-enabled during resume. Reported-by: Angus Clark Signed-off-by: Florian Fainelli --- Changes in v2: - use DEFINE_SIMPLE_DEV_PM_OPS as suggested by Uwe drivers/pwm/pwm-bcm2835.c | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) diff --git a/drivers/pwm/pwm-bcm2835.c b/drivers/pwm/pwm-bcm2835.c index bdfc2a5ec0d6..938f993ae746 100644 --- a/drivers/pwm/pwm-bcm2835.c +++ b/drivers/pwm/pwm-bcm2835.c @@ -182,6 +182,25 @@ static void bcm2835_pwm_remove(struct platform_device = *pdev) clk_disable_unprepare(pc->clk); } =20 +static int __maybe_unused bcm2835_pwm_suspend(struct device *dev) +{ + struct bcm2835_pwm *pc =3D dev_get_drvdata(dev); + + clk_disable_unprepare(pc->clk); + + return 0; +} + +static int __maybe_unused bcm2835_pwm_resume(struct device *dev) +{ + struct bcm2835_pwm *pc =3D dev_get_drvdata(dev); + + return clk_prepare_enable(pc->clk); +} + +static DEFINE_SIMPLE_DEV_PM_OPS(bcm2835_pwm_pm_ops, bcm2835_pwm_suspend, + bcm2835_pwm_resume); + static const struct of_device_id bcm2835_pwm_of_match[] =3D { { .compatible =3D "brcm,bcm2835-pwm", }, { /* sentinel */ } @@ -192,6 +211,7 @@ static struct platform_driver bcm2835_pwm_driver =3D { .driver =3D { .name =3D "bcm2835-pwm", .of_match_table =3D bcm2835_pwm_of_match, + .pm =3D &bcm2835_pwm_pm_ops, }, .probe =3D bcm2835_pwm_probe, .remove_new =3D bcm2835_pwm_remove, --=20 2.34.1 --00000000000023830a06074ea14d Content-Type: application/pkcs7-signature; name="smime.p7s" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="smime.p7s" Content-Description: S/MIME Cryptographic Signature MIIQeQYJKoZIhvcNAQcCoIIQajCCEGYCAQExDzANBglghkgBZQMEAgEFADALBgkqhkiG9w0BBwGg gg3QMIIFDTCCA/WgAwIBAgIQeEqpED+lv77edQixNJMdADANBgkqhkiG9w0BAQsFADBMMSAwHgYD VQQLExdHbG9iYWxTaWduIFJvb3QgQ0EgLSBSMzETMBEGA1UEChMKR2xvYmFsU2lnbjETMBEGA1UE AxMKR2xvYmFsU2lnbjAeFw0yMDA5MTYwMDAwMDBaFw0yODA5MTYwMDAwMDBaMFsxCzAJBgNVBAYT AkJFMRkwFwYDVQQKExBHbG9iYWxTaWduIG52LXNhMTEwLwYDVQQDEyhHbG9iYWxTaWduIEdDQyBS 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