From patchwork Wed Jul 21 20:46:50 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lucas Stach X-Patchwork-Id: 12392139 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-18.2 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 70318C6377B for ; Wed, 21 Jul 2021 20:49:32 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 26EEF600D1 for ; Wed, 21 Jul 2021 20:49:32 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 26EEF600D1 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=pengutronix.de Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=V06CAnyoJxObvzJyIrSwOm0Lrw0oLwxuI2Q1b6QUj7s=; b=TwdFF4Qc1gY4lk ROCxGe5keyFhMcipA2r9cGOMwYGn6oCkYDru6JZ3hK16Hmakbmv6D3OcRidi7HxkW+WDy+wSOHQOU 1Cy+h9GmKHnwRltzFQvmgyvce6hdKle7+zgHklM5w8wAIAjDTaTlK2NlNyO0z4YndzH8Kac58GCyd N49lJ9z8kg4SMu5mH/VN+DYd4eNVr8SVuw61N+QrbR1lFFMkVVYIW3xfqe8s4m34mQDdZf6AS1Bz3 SH0QkHJHOZ6pSQv3tXn57qrXmmEwjon+n1CbIsCXFjyboxYQVIFMnHH1I0tLHXfXWvHbpicwsKM81 tah8l+/svKdFDYytU+7g==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1m6J8E-00H8zR-IT; Wed, 21 Jul 2021 20:47:54 +0000 Received: from metis.ext.pengutronix.de ([2001:67c:670:201:290:27ff:fe1d:cc33]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1m6J7a-00H8q9-NH for linux-arm-kernel@lists.infradead.org; Wed, 21 Jul 2021 20:47:17 +0000 Received: from dude03.red.stw.pengutronix.de ([2a0a:edc0:0:1101:1d::39]) by metis.ext.pengutronix.de with esmtp (Exim 4.92) (envelope-from ) id 1m6J7U-0004jk-MS; Wed, 21 Jul 2021 22:47:08 +0200 From: Lucas Stach To: Shawn Guo , Rob Herring Cc: NXP Linux Team , Adam Ford , Frieder Schrempf , Peng Fan , Marek Vasut , devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kernel@pengutronix.de, patchwork-lst@pengutronix.de Subject: [PATCH v2 05/18] soc: imx: gpcv2: add domain option to keep domain clocks enabled Date: Wed, 21 Jul 2021 22:46:50 +0200 Message-Id: <20210721204703.1424034-6-l.stach@pengutronix.de> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20210721204703.1424034-1-l.stach@pengutronix.de> References: <20210716232916.3572966-1-l.stach@pengutronix.de> <20210721204703.1424034-1-l.stach@pengutronix.de> MIME-Version: 1.0 X-SA-Exim-Connect-IP: 2a0a:edc0:0:1101:1d::39 X-SA-Exim-Mail-From: l.stach@pengutronix.de X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de); SAEximRunCond expanded to false X-PTX-Original-Recipient: linux-arm-kernel@lists.infradead.org X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210721_134714_896516_7B9B52A1 X-CRM114-Status: GOOD ( 15.22 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Some of the MIX domains are using clocks to drive the bus bridges. Those must be enabled at all times, as long as the domain is powered up and they don't have any other consumer than the power domain. Add an option to keep the clocks attached to a domain enabled as long as the domain is power up and only disable them after the domain is powered down. Signed-off-by: Lucas Stach Reviewed-by: Peng Fan --- drivers/soc/imx/gpcv2.c | 14 +++++++++----- 1 file changed, 9 insertions(+), 5 deletions(-) diff --git a/drivers/soc/imx/gpcv2.c b/drivers/soc/imx/gpcv2.c index 35f26f57d1ac..c3b1d2580963 100644 --- a/drivers/soc/imx/gpcv2.c +++ b/drivers/soc/imx/gpcv2.c @@ -202,6 +202,7 @@ struct imx_pgc_domain { } bits; const int voltage; + const bool keep_clocks; struct device *dev; }; @@ -295,7 +296,8 @@ static int imx_pgc_power_up(struct generic_pm_domain *genpd) } /* Disable reset clocks for all devices in the domain */ - clk_bulk_disable_unprepare(domain->num_clks, domain->clks); + if (!domain->keep_clocks) + clk_bulk_disable_unprepare(domain->num_clks, domain->clks); return 0; @@ -317,10 +319,12 @@ static int imx_pgc_power_down(struct generic_pm_domain *genpd) int ret; /* Enable reset clocks for all devices in the domain */ - ret = clk_bulk_prepare_enable(domain->num_clks, domain->clks); - if (ret) { - dev_err(domain->dev, "failed to enable reset clocks\n"); - return ret; + if (!domain->keep_clocks) { + ret = clk_bulk_prepare_enable(domain->num_clks, domain->clks); + if (ret) { + dev_err(domain->dev, "failed to enable reset clocks\n"); + return ret; + } } /* request the ADB400 to power down */