From patchwork Thu Feb 15 15:17:45 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Thomas Richard X-Patchwork-Id: 13558622 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 CAD5AC4829E for ; Thu, 15 Feb 2024 15:18:24 +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:MIME-Version:Message-Id:Date: Subject:From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=8VVsjJ+OPsTh40QdQse1QeSOO5Ue4UMZWlhMDWaqmA8=; b=FoeWbX/kS+AW5L 8la7n7D30m/I2SqJQrh/yPgJKNnMHWKdHasGCSfY6vcmxYltBTPpRNNPL1mrSy/MbON/yxJmn3wvI FjW/kgQSwostomA2YRVC0UJFkQF3VqcXrHUd4jVTc/yGGR7D3vGCWmrEkxQbrrApANEzee55NlFxC zzOncqje4Fvvp8W8/1Dez8yJrZhU62X6p2UBHvwL81uVaJA3Ytr+uUJIoTuOZ2WwSC54VAI/T4R8H PpTztXwc+rnT1E4YBy0DtHJK46wLiCfX75+mb+gbTa38dIQWMEAiQiAuMkxAFvQBFW0xty0DAr3+b 973o+nfOVGSKXQsSfQhw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1radV2-0000000Ggqm-3Ohz; Thu, 15 Feb 2024 15:18:08 +0000 Received: from relay1-d.mail.gandi.net ([217.70.183.193]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1radUy-0000000GgoW-1qin; Thu, 15 Feb 2024 15:18:06 +0000 Received: by mail.gandi.net (Postfix) with ESMTPSA id 8270C240002; Thu, 15 Feb 2024 15:17:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1708010279; 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; bh=mFwF74WYG389eTgoCBYbyxfkr+BMGReUM+V29ejlH/U=; b=o9DbmqpX4/9BdCNE5XP79nCuaHvPL3RSwYXLefC9AJr49SuqVn3XKDXDtej/ID9DyQRboT 6u1yn7jIStwyGAhYzO5ATu7pptNaohDS2ZrCLPXskvm+Nm3iEdf1G0YYl3siW7qgw/OKUn zVHPSIdue3Jq+cDPL6NNW7NVvY1eAJbQDJNlGBCU0CGcPMgnW97E0O0o+8omOjAcaQj4FC 40hZf8UBmaWOUGGFL3CM0LoU4uXpj8wvxUFt8c2rym1n5LpMz6gtBEMGlW+c4Mc4qHMZjx xcbwmKpDSpz/78ukf6JT1G3dRc9WJnGouHmAeGu5fYJPzIASeTCac6dOGjC/wA== From: Thomas Richard Subject: [PATCH v3 00/18] Add suspend to ram support for PCIe on J7200 Date: Thu, 15 Feb 2024 16:17:45 +0100 Message-Id: <20240102-j7200-pcie-s2r-v3-0-5c2e4a3fac1f@bootlin.com> MIME-Version: 1.0 X-B4-Tracking: v=1; b=H4sIABkrzmUC/32NQQ7CIBBFr9KwdgxMS2hdeQ/jAujUYrQ00BBN0 7sL3bnQ5Z/5/72VRQqOIjtVKwuUXHR+yqE+VMyOeroRuD5nhhwbLjjCXSHnMFtHEDEAWSN0pzq qpWJ5ZHQkMEFPdiyzp44LhfKYAw3utZsu15xHFxcf3rs4iXL96UgCOLQNSdlrmSv8bLxfHm46W v9kBZbwPwALgJpB9YgtWfwGbNv2Adp2j00IAQAA 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 , 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 , Bartosz Golaszewski , Andy Shevchenko 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-20240215_071804_780131_D1B76DDE X-CRM114-Status: GOOD ( 17.71 ) 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 This add suspend to ram support for the PCIe (RC mode) on J7200 platform. In RC mode, the reset pin for endpoints is managed by a gpio expander on a i2c bus. This pin shall be managed in suspend_noirq() and resume_noirq(). The suspend/resume has been moved to suspend_noirq()/resume_noirq() for pca953x (expander) and pinctrl-single. To do i2c accesses during suspend_noirq/resume_noirq, we need to force the wakeup of the i2c controller (which is autosuspended) during suspend callback. It's the only way to wakeup the controller if it's autosuspended, as runtime pm is disabled in suspend_noirq and resume_noirq. The main change in this v3 is the removal of the probe boolean for the functions wiz_clock_probe() and cdns_pcie_host_setup(). Their contents were split in multiple functions which are called in the resume_noirq() callbacks. Signed-off-by: Thomas Richard --- Changes in v3: - pinctrl-single: split patch in two parts, a first patch to remove the dead code, a second to move suspend()/resume() callbacks to noirq. - i2c-omap: add a comments above the suspend_noirq() callback. - mux: now mux_chip_resume() try to restores all muxes, then return 0 if all is ok or the first failure. - mmio: fix commit message. - phy-j721e-wiz: add a patch to use dev_err_probe() instead of dev_err() in the wiz_clock_init() function. - phy-j721e-wiz: remove probe boolean for the wiz_clock_init(), rename the function to wiz_clock_probe(), extract hardware configuration part in a new function wiz_clock_init(). - phy-cadence-torrent: use dev_err_probe() and fix commit messages - pcie-cadence-host: remove probe boolean for the cdns_pcie_host_setup() function and extract the link setup part in a new function cdns_pcie_host_link_setup(). - pcie-cadence-host: make cdns_pcie_host_init() global. - pci-j721e: use the cdns_pcie_host_link_setup() cdns_pcie_host_init() functions in the resume_noirq() callback. - Link to v2: https://lore.kernel.org/r/20240102-j7200-pcie-s2r-v2-0-8e4f7d228ec2@bootlin.com Changes in v2: - all: fix commits messages. - all: use DEFINE_NOIRQ_DEV_PM_OPS and pm_sleep_ptr macros. - all: remove useless #ifdef CONFIG_PM. - pinctrl-single: drop dead code - mux: add mux_chip_resume() function in mux core. - mmio: resume sequence is now a call to mux_chip_resume(). - phy-cadence-torrent: fix typo in resume sequence (reset_control_assert() instead of reset_control_put()). - phy-cadence-torrent: use PHY instead of phy. - pci-j721e: do not shadow cdns_pcie_host_setup return code in resume sequence. - pci-j721e: drop dead code. - Link to v1: https://lore.kernel.org/r/20240102-j7200-pcie-s2r-v1-0-84e55da52400@bootlin.com --- Thomas Richard (15): gpio: pca953x: move suspend()/resume() to suspend_noirq()/resume_noirq() pinctrl: pinctrl-single: remove dead code in suspend() and resume() callbacks pinctrl: pinctrl-single: move suspend()/resume() callbacks to noirq i2c: omap: wakeup the controller during suspend() callback mux: add mux_chip_resume() function phy: ti: phy-j721e-wiz: use dev_err_probe() instead of dev_err() phy: ti: phy-j721e-wiz: split wiz_clock_init() function phy: ti: phy-j721e-wiz: add resume support phy: cadence-torrent: extract calls to clk_get from cdns_torrent_clk phy: cadence-torrent: register resets even if the phy is already configured phy: cadence-torrent: add already_configured to struct cdns_torrent_phy phy: cadence-torrent: remove noop_ops phy operations phy: cadence-torrent: add suspend and resume support PCI: cadence: extract link setup sequence from cdns_pcie_host_setup() PCI: cadence: set cdns_pcie_host_init() global Théo Lebrun (3): mux: mmio: add resume support PCI: j721e: add reset GPIO to struct j721e_pcie PCI: j721e: add suspend and resume support drivers/gpio/gpio-pca953x.c | 7 +- drivers/i2c/busses/i2c-omap.c | 22 ++++ drivers/mux/core.c | 30 +++++ drivers/mux/mmio.c | 12 ++ drivers/pci/controller/cadence/pci-j721e.c | 102 ++++++++++++++++- drivers/pci/controller/cadence/pcie-cadence-host.c | 44 +++++--- drivers/pci/controller/cadence/pcie-cadence.h | 12 ++ drivers/phy/cadence/phy-cadence-torrent.c | 121 +++++++++++++++------ drivers/phy/ti/phy-j721e-wiz.c | 119 +++++++++++++------- drivers/pinctrl/pinctrl-single.c | 28 ++--- include/linux/mux/driver.h | 1 + 11 files changed, 380 insertions(+), 118 deletions(-) --- base-commit: 00ff0f9ce40db8e64fe16c424a965fd7ab769c42 change-id: 20240102-j7200-pcie-s2r-ecb1a979e357 Best regards,