From patchwork Mon Jan 15 16:14:52 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Thomas Richard X-Patchwork-Id: 13519836 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 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 smtp.lore.kernel.org (Postfix) with ESMTPS id E0ECAC3DA79 for ; Mon, 15 Jan 2024 16:17:31 +0000 (UTC) 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:Cc:To:In-Reply-To:References:Message-Id :MIME-Version:Subject:Date:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=T9xeH2mCpI3O3avBJOQt8cL/QRN1oZbLZRQOZO+wiKs=; b=Kavizaz+nPv9rC Vy6NjozYV1PZmmVUEl86JOsPShC7iWqZMtA63TSgN5JeTQwm6iu3h4OdVdyDYeavd8i3J9uyN5IF+ 5f7sQiDRP03jjKdRIhdSz462chZucZq/xuaEjExkg2b0aBKAyPUkYu3r4CXDdZ3bzV7zHVvfVVujK IiCDs/ZYLRwMkeJNBQVfGdUxiQDTDq4WzT75pipHy4EHIhvsuTmvF6BWCYw5c0HMI+hxdmu0M6dL2 2XP9G1U2Xq+OwMUziSs77CNvnXs/xDUZ7BDRolHzcES+hmbvZRZXCK6YXR6YHOD386PQmvnVQ1jHT /wnDTfQuO5IQOLRNDQIA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1rPPe4-009bAD-1p; Mon, 15 Jan 2024 16:17:04 +0000 Received: from relay6-d.mail.gandi.net ([2001:4b98:dc4:8::226]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1rPPdV-009abA-2l; Mon, 15 Jan 2024 16:16:31 +0000 Received: by mail.gandi.net (Postfix) with ESMTPSA id 26252C0010; Mon, 15 Jan 2024 16:16:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1705335388; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=ZG2Pox00yczUKsAlTmAE1lwg+/Kk7l0gD46+mEZfvAE=; b=XGvUOA+e6WdCR5PyqrZfuF3SK/PbCfdr6CrX72v2I0IcCGz6htsbkE35DqpOh78dCB30vx VmFbjwqxVuXofkTBoLio5wn+Osd0rYWMUhLDcrcdGQWTYKBf40QT8yDgCq+tZlbEUziIDf cvIITxE0+8Q9SQNpINfr3+L7LLsYBXMBKsqbthuzb85zrjiN8Q8aZHbWrsh0gqE6C6vpfF /FbHjbC8TGebFkQyb7tSjXBBq5QRt6ttYsD0fuZcjzEAi6fJCkjskscR8YBQuhHD9VKnfR GdU01PLTUzSM0c/Bo6VKZRp5iyooUBB62UGPMuBLkxyop3kw1iTa7PznPYj/hQ== From: Thomas Richard Date: Mon, 15 Jan 2024 17:14:52 +0100 Subject: [PATCH 11/14] phy: cadence-torrent: add suspend and resume support MIME-Version: 1.0 Message-Id: <20240102-j7200-pcie-s2r-v1-11-84e55da52400@bootlin.com> References: <20240102-j7200-pcie-s2r-v1-0-84e55da52400@bootlin.com> In-Reply-To: <20240102-j7200-pcie-s2r-v1-0-84e55da52400@bootlin.com> To: Linus Walleij , Bartosz Golaszewski , Andy Shevchenko , Tony Lindgren , Haojian Zhuang , Vignesh R , Aaro Koskinen , Janusz Krzysztofik , Andi Shyti , Peter Rosin , Vinod Koul , Kishon Vijay Abraham I , Philipp Zabel , Tom Joseph , Lorenzo Pieralisi , =?utf-8?q?Krzysztof_Wilczy?= =?utf-8?q?=C5=84ski?= , Rob Herring , Bjorn Helgaas Cc: linux-gpio@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-omap@vger.kernel.org, linux-i2c@vger.kernel.org, linux-phy@lists.infradead.org, linux-pci@vger.kernel.org, gregory.clement@bootlin.com, theo.lebrun@bootlin.com, thomas.petazzoni@bootlin.com, u-kumar1@ti.com, Thomas Richard X-Mailer: b4 0.12.0 X-GND-Sasl: thomas.richard@bootlin.com X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240115_081630_184738_3D449409 X-CRM114-Status: GOOD ( 14.32 ) 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 Add suspend and resume support. The alread_configured flag is cleared during suspend stage to force the phy initialization during the resume stage. Based on the work of Théo Lebrun Signed-off-by: Thomas Richard --- drivers/phy/cadence/phy-cadence-torrent.c | 57 +++++++++++++++++++++++++++++++ 1 file changed, 57 insertions(+) diff --git a/drivers/phy/cadence/phy-cadence-torrent.c b/drivers/phy/cadence/phy-cadence-torrent.c index 70413fca5776..31b2594e5942 100644 --- a/drivers/phy/cadence/phy-cadence-torrent.c +++ b/drivers/phy/cadence/phy-cadence-torrent.c @@ -3006,6 +3006,62 @@ static void cdns_torrent_phy_remove(struct platform_device *pdev) cdns_torrent_clk_cleanup(cdns_phy); } +#ifdef CONFIG_PM +static int cdns_torrent_phy_suspend_noirq(struct device *dev) +{ + struct cdns_torrent_phy *cdns_phy = dev_get_drvdata(dev); + int i; + + reset_control_assert(cdns_phy->phy_rst); + reset_control_assert(cdns_phy->apb_rst); + for (i = 0; i < cdns_phy->nsubnodes; i++) + reset_control_assert(cdns_phy->phys[i].lnk_rst); + + if (!cdns_phy->already_configured) + clk_disable_unprepare(cdns_phy->clk); + else + cdns_phy->already_configured = 0; + + return 0; +} + +static int cdns_torrent_phy_resume_noirq(struct device *dev) +{ + struct cdns_torrent_phy *cdns_phy = dev_get_drvdata(dev); + int node = cdns_phy->nsubnodes; + int ret, i; + + ret = cdns_torrent_clk(cdns_phy); + if (ret) + goto clk_cleanup; + + /* Enable APB */ + reset_control_deassert(cdns_phy->apb_rst); + + if (cdns_phy->nsubnodes > 1) { + ret = cdns_torrent_phy_configure_multilink(cdns_phy); + if (ret) + goto put_lnk_rst; + } + + return 0; + +put_lnk_rst: + for (i = 0; i < node; i++) + reset_control_put(cdns_phy->phys[i].lnk_rst); + reset_control_assert(cdns_phy->apb_rst); + clk_disable_unprepare(cdns_phy->clk); +clk_cleanup: + cdns_torrent_clk_cleanup(cdns_phy); + return ret; +} + +static const struct dev_pm_ops cdns_torrent_phy_pm_ops = { + SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(cdns_torrent_phy_suspend_noirq, + cdns_torrent_phy_resume_noirq) +}; +#endif + /* USB and DP link configuration */ static struct cdns_reg_pairs usb_dp_link_cmn_regs[] = { {0x0002, PHY_PLL_CFG}, @@ -4577,6 +4633,7 @@ static struct platform_driver cdns_torrent_phy_driver = { .driver = { .name = "cdns-torrent-phy", .of_match_table = cdns_torrent_phy_of_match, + .pm = pm_ptr(&cdns_torrent_phy_pm_ops), } }; module_platform_driver(cdns_torrent_phy_driver);