From patchwork Fri Jan 26 14:36:42 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Thomas Richard X-Patchwork-Id: 767098 Received: from relay2-d.mail.gandi.net (relay2-d.mail.gandi.net [217.70.183.194]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D54D01CD07; Fri, 26 Jan 2024 14:37:39 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.70.183.194 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1706279863; cv=none; b=Ozq8UEVlYUZFZabQ+tSn1Q62C6lFNo3zGeVzlR2fLm1ZJFZkt+enfPmIzvd8On4GrRvXnYgN9nEAB8SbhCwZP3hb7MuUzysBDNtvyS/0upVH4W1yHVU0EnQ+Q/thq02gMU7MV0uBuFAOsCP4vnhftA6H9MzxFCIFRhu8/S7N7pU= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1706279863; c=relaxed/simple; bh=xgBJPPCeFx6F8RvuJZb3CDZIbr5zJcVGTJYWir/0iIY=; h=From:Subject:Date:Message-Id:MIME-Version:Content-Type:To:Cc; b=PtZHDb8awaOPUmsyum+NuRw91odl5U5e7zn9DTT2rciTigcoqt7pPYt5z3YCr3v5L1ngVdCc+6ZeoQjAV6DWLqWOvz5DZR8UenBFVZXsMaNElMCe1ycIJqHge4PVKbkwp0vgmVKgiHDGH5SgLDZQiKM9A/YyA0wMEIdk3ZgKsPA= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com; spf=pass smtp.mailfrom=bootlin.com; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b=jYJ+UGbM; arc=none smtp.client-ip=217.70.183.194 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=bootlin.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=bootlin.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=bootlin.com header.i=@bootlin.com header.b="jYJ+UGbM" Received: by mail.gandi.net (Postfix) with ESMTPSA id 3A5F94000C; Fri, 26 Jan 2024 14:37:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bootlin.com; s=gm1; t=1706279851; 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=62/qYpK4+YlKzbTb8Bu4FQMVmVipXLL21WAgCC0RYzA=; b=jYJ+UGbML212yaitjT4mp/B0Uhj+CdJw4jD57IsqiYRIgwE1hfwmCP4ECofgfoBbqQnNM1 e5uVAXyA5/zPYjCo9OvZwSdnBssk0iN6GMJX+eWzY2rE2ctgKmhw9xAwV5f+86HVqVGSnY NoIlCcSt5qwkRpmaPKkO78NxWwWIP8nRtDmqwyGY/y5YhHSNYsmLZPyqOuo841+KBD4ys/ 3h94YI4MafeM0g6YI+/sN6zd2r5qGVHN48dh1XVQ2ebTqiP7bvyrtsyiXGFiE798lcgEDM vNhrh6WJx/tIpjPMgqDkRa7oXoJUA1g3LymgdRex25VzqieDKKrJy4xV8WqVJw== From: Thomas Richard Subject: [PATCH v2 00/15] Add suspend to ram support for PCIe on J7200 Date: Fri, 26 Jan 2024 15:36:42 +0100 Message-Id: <20240102-j7200-pcie-s2r-v2-0-8e4f7d228ec2@bootlin.com> Precedence: bulk X-Mailing-List: linux-omap@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-B4-Tracking: v=1; b=H4sIAHrDs2UC/3WNTQ6CMBBGr0K6dsy00iCuvIdh0ZZRxmhLOoRoC He3sHf5vp+8RQllJlGXalGZZhZOsYA5VCoMLj4IuC+sDJoaNRp4NgYRxsAEYjJQ8Nq1TUsn26h y8k4IfHYxDNvt7WSivBVjpjt/dtOtKzywTCl/d/Gst/SvY9aAcK7J2t7ZMsGrT2l6cTyG9Fbdu q4/Q9ZwwccAAAA= 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 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 v2 is the add of mux_chip_resume() function in the mux core. This function restores the state of mux-chip using cached state. It's used by mmio driver in the resume_noirq() callback. Signed-off-by: Thomas Richard --- 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 (11): gpio: pca953x: move suspend()/resume() to suspend_noirq()/resume_noirq() 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: make wiz_clock_init callable multiple times 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 Théo Lebrun (4): mux: mmio: add resume support PCI: cadence: add resume support to cdns_pcie_host_setup() 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 | 14 +++ drivers/mux/core.c | 27 +++++ drivers/mux/mmio.c | 12 ++ drivers/pci/controller/cadence/pci-j721e.c | 93 ++++++++++++++-- drivers/pci/controller/cadence/pcie-cadence-host.c | 49 +++++---- drivers/pci/controller/cadence/pcie-cadence-plat.c | 2 +- drivers/pci/controller/cadence/pcie-cadence.h | 4 +- drivers/phy/cadence/phy-cadence-torrent.c | 122 +++++++++++++++------ drivers/phy/ti/phy-j721e-wiz.c | 95 ++++++++++++---- drivers/pinctrl/pinctrl-single.c | 28 ++--- include/linux/mux/driver.h | 1 + 12 files changed, 343 insertions(+), 111 deletions(-) --- base-commit: 00ff0f9ce40db8e64fe16c424a965fd7ab769c42 change-id: 20240102-j7200-pcie-s2r-ecb1a979e357 Best regards,