From nobody Thu Sep 18 02:51:59 2025 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 48DF9C4332F for ; Tue, 13 Dec 2022 11:24:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235208AbiLMLYX (ORCPT ); Tue, 13 Dec 2022 06:24:23 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58944 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235309AbiLMLXp (ORCPT ); Tue, 13 Dec 2022 06:23:45 -0500 Received: from esa.microchip.iphmx.com (esa.microchip.iphmx.com [68.232.154.123]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 67BFE13F45; Tue, 13 Dec 2022 03:23:44 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=microchip.com; i=@microchip.com; q=dns/txt; s=mchp; t=1670930625; x=1702466625; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=skGTs2WvA6zYDm87dHeVl8kymrVloAz2yV13MCgFbvY=; b=eJpeLcVonPhOGUXaRuQeRcHiIACSDw0Q/GpDLRbvo+4sN94+AI5sIo2p U+WZcvm7A2L4GBtn2YhbrUMXWNa+2sq73iDVvqxuMCNKuC21zAF0tyuhJ 1ZfbBemD4DjCv/QFf72WFUw8f9J7bI9R6ov7mqNr5CFlbkOvfkc7TwCOz +N7Q8p9wuShtuRcWHvOIdjNAPCdM1RhQ52szjJb+WKwWheVxvBJjDKeL/ eIalk/6hwRHtDjmqjKF+Wcyca4Peb6SmsRC98otDBT1I1XmA1Z+/+UEOL ztkQP8wzDrg7a6GghePDoV8+hEpNPr7PTy3WpksN9K7kCsRQEjnjnjzmK A==; X-IronPort-AV: E=Sophos;i="5.96,241,1665471600"; d="scan'208";a="187911755" Received: from unknown (HELO email.microchip.com) ([170.129.1.10]) by esa4.microchip.iphmx.com with ESMTP/TLS/AES256-SHA256; 13 Dec 2022 04:23:44 -0700 Received: from chn-vm-ex02.mchp-main.com (10.10.85.144) by chn-vm-ex01.mchp-main.com (10.10.85.143) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.16; Tue, 13 Dec 2022 04:23:42 -0700 Received: from localhost.localdomain (10.10.115.15) by chn-vm-ex02.mchp-main.com (10.10.85.144) with Microsoft SMTP Server id 15.1.2507.16 via Frontend Transport; Tue, 13 Dec 2022 04:23:39 -0700 From: Claudiu Beznea To: , , , , , , , CC: , , , , Claudiu Beznea Subject: [PATCH v3 3/4] ASoC: mchp-pdmc: add support for suspend to RAM Date: Tue, 13 Dec 2022 13:28:50 +0200 Message-ID: <20221213112851.89212-4-claudiu.beznea@microchip.com> X-Mailer: git-send-email 2.33.0 In-Reply-To: <20221213112851.89212-1-claudiu.beznea@microchip.com> References: <20221213112851.89212-1-claudiu.beznea@microchip.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Add support for suspend to RAM by re-aranging the lines in switch..case from mchp_pdmc_trigger() and saving/restoring the enabled interrupts. These are necessary as AT91 devices has a special power saving mode (called backup and self-refresh) where most of the SoC parts are powered off and thus we need to reconfigure the PDMC on resume. Signed-off-by: Claudiu Beznea --- sound/soc/atmel/mchp-pdmc.c | 19 +++++++++++++------ 1 file changed, 13 insertions(+), 6 deletions(-) diff --git a/sound/soc/atmel/mchp-pdmc.c b/sound/soc/atmel/mchp-pdmc.c index f184404e74e5..cf4084dcbd5e 100644 --- a/sound/soc/atmel/mchp-pdmc.c +++ b/sound/soc/atmel/mchp-pdmc.c @@ -113,6 +113,7 @@ struct mchp_pdmc { struct clk *pclk; struct clk *gclk; u32 pdmcen; + u32 suspend_irq; int mic_no; int sinc_order; bool audio_filter_en; @@ -641,22 +642,27 @@ static int mchp_pdmc_trigger(struct snd_pcm_substream= *substream, #endif =20 switch (cmd) { - case SNDRV_PCM_TRIGGER_START: case SNDRV_PCM_TRIGGER_RESUME: - case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: + case SNDRV_PCM_TRIGGER_START: /* Enable overrun and underrun error interrupts */ - regmap_write(dd->regmap, MCHP_PDMC_IER, + regmap_write(dd->regmap, MCHP_PDMC_IER, dd->suspend_irq | MCHP_PDMC_IR_RXOVR | MCHP_PDMC_IR_RXUDR); + dd->suspend_irq =3D 0; + fallthrough; + case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: snd_soc_component_update_bits(cpu, MCHP_PDMC_MR, MCHP_PDMC_MR_PDMCEN_MASK, dd->pdmcen); break; - case SNDRV_PCM_TRIGGER_STOP: case SNDRV_PCM_TRIGGER_SUSPEND: - case SNDRV_PCM_TRIGGER_PAUSE_PUSH: + regmap_read(dd->regmap, MCHP_PDMC_IMR, &dd->suspend_irq); + fallthrough; + case SNDRV_PCM_TRIGGER_STOP: /* Disable overrun and underrun error interrupts */ - regmap_write(dd->regmap, MCHP_PDMC_IDR, + regmap_write(dd->regmap, MCHP_PDMC_IDR, dd->suspend_irq | MCHP_PDMC_IR_RXOVR | MCHP_PDMC_IR_RXUDR); + fallthrough; + case SNDRV_PCM_TRIGGER_PAUSE_PUSH: snd_soc_component_update_bits(cpu, MCHP_PDMC_MR, MCHP_PDMC_MR_PDMCEN_MASK, 0); break; @@ -1107,6 +1113,7 @@ static const struct of_device_id mchp_pdmc_of_match[]= =3D { MODULE_DEVICE_TABLE(of, mchp_pdmc_of_match); =20 static const struct dev_pm_ops mchp_pdmc_pm_ops =3D { + SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, pm_runtime_force_resume) RUNTIME_PM_OPS(mchp_pdmc_runtime_suspend, mchp_pdmc_runtime_resume, NULL) }; --=20 2.34.1