From patchwork Fri Feb 16 20:32:15 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bartosz Golaszewski X-Patchwork-Id: 13560564 X-Patchwork-Delegate: kvalo@adurom.com Received: from mail-wm1-f52.google.com (mail-wm1-f52.google.com [209.85.128.52]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 3F2541552FD for ; Fri, 16 Feb 2024 20:33:41 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.52 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708115625; cv=none; b=gNfM+fgiYYczx/RY2EkXJkBeDBue/CNw/PEsRn/hLpoqFRA4yKdaJtfuRBXgQPv+mghOowZEAdRo+FZopqNLmjTW88m/6cTKWdV4sxHi3y0TutvET8pbrz8zc08kwexKIiZk4KnnRiXOplrrsWwNTkaU8AYxmLKq0C5LVfsl+9U= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1708115625; c=relaxed/simple; bh=l7BCMdtK460/NfNyVFkhn6WxPhHDN9NJk1dX5OE3xb4=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=YINu9WBoFv3lvIuxJMpTpnmR57tnLEA77gdsfcVHzJCqW9z7+XFzTnvY27hHHn4A8feYm7JBq3NW2G7ob42xRU+/jtIai3hY68jAsbNYzQ5HCePty+T2z5lnFlfmpyi63qcmNJZFq9Q9bN/HMZ+LRQAp9ol2oBDL50bF5hRP3yw= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=bgdev.pl; spf=none smtp.mailfrom=bgdev.pl; dkim=pass (2048-bit key) header.d=bgdev-pl.20230601.gappssmtp.com header.i=@bgdev-pl.20230601.gappssmtp.com header.b=AbkrsG4h; arc=none smtp.client-ip=209.85.128.52 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=bgdev.pl Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=bgdev.pl Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=bgdev-pl.20230601.gappssmtp.com header.i=@bgdev-pl.20230601.gappssmtp.com header.b="AbkrsG4h" Received: by mail-wm1-f52.google.com with SMTP id 5b1f17b1804b1-41258904302so175475e9.3 for ; Fri, 16 Feb 2024 12:33:41 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bgdev-pl.20230601.gappssmtp.com; s=20230601; t=1708115620; x=1708720420; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=H+W//dfF0n/wy1LXmbmCGBv/0bG6tpfv/t9YAFDF8dg=; b=AbkrsG4hQozdqZIAuPuUwi6rboShfc+IbD8ZzU38JoHYU54EYvu5+IRAI/AZBtmGjF SNyCVX/wbfv8KwFnh8dOXq2QGD/byWIq5EppoOcTAwrDUh08EJhd9k4mY32qdpRG1iz7 5AQDmIaLXQhGVN6SBIdVseU09vRy9eC+p6+jhBkIh1HdEVKi88hs2PtCWDwsiitjqqoi 0BDFFaGoteZUSskckF+knIUgD68zDIH1lx7Cv0E1OkBocylB2h9+ojBklqMqLbacBIPS PCEoyccHC2UFBLUaMm6qRdnmijMTz1b4r0zzDudQD+P2fs9+BsV7letxEFv+BSlarZxE /3mQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1708115620; x=1708720420; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=H+W//dfF0n/wy1LXmbmCGBv/0bG6tpfv/t9YAFDF8dg=; b=GDJCScsdf/xf2P8ohls0YlqdEikGD5LrqNWofIuVbSSVGpvgSaDYgNTMRX5DygVcLt gyxGRc2NGu/DHEJ5aA4n+BLkOocO723TvvgwC/3O7F3Os8jc2yAAPVOXlAeKg1K8M94f +OdfZRh2NOPiA5Orj+C3tcigrM4LON7/Pzms4PtG610CiU70zTgGHlLtvcJyCi+LxpPn t4z3Jy7gUoPey6y56r1mvkGOZLJt1qNKCK/b5dfW1pkwhsi2qvzH4adUivYUDXRbPoCe qkwREEdahV5Lt6F6ljCW9dTjJ+yr8HLkfw6K/zZFEaqwXpPtJcD0MPDJT0AdkidSvlX1 Llwg== X-Forwarded-Encrypted: i=1; AJvYcCVh3ndl+QbQ69Qcc7PIQx7Kcf3Raf8lHzuY7GbO8TxNx5ury7Ry/Vsrbc2gHL0c4MrYZzScIfSHePAndybhCNYD1JVh5VV51P8Q2nmn9SA= X-Gm-Message-State: AOJu0YzSEb5f28PxVGXERN2D4hJleQWJKCtAjoPTFIBSbcIGZZjHaR3r cG7rA2leBxQptCAXSrcUUsb0LbkZVqRr3RAxrX/oUp50qbBNXAbvGE89nb6Nvzk= X-Google-Smtp-Source: AGHT+IGBibCllNh8ll1Vx+GOheKaOUkavu0vOY90FybjEbw07Iwz+LAx2+7vA1a+b5lW/0606M1yCA== X-Received: by 2002:a05:600c:444b:b0:40f:e806:2f26 with SMTP id v11-20020a05600c444b00b0040fe8062f26mr4798554wmn.12.1708115619950; Fri, 16 Feb 2024 12:33:39 -0800 (PST) Received: from brgl-uxlite.home ([2a01:cb1d:334:ac00:7758:12d:16:5f19]) by smtp.gmail.com with ESMTPSA id m5-20020a05600c4f4500b0041253d0acd6sm1420528wmq.47.2024.02.16.12.33.38 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 16 Feb 2024 12:33:39 -0800 (PST) From: Bartosz Golaszewski To: Marcel Holtmann , Luiz Augusto von Dentz , "David S . Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Kalle Valo , Bjorn Andersson , Konrad Dybcio , Liam Girdwood , Mark Brown , Catalin Marinas , Will Deacon , Bjorn Helgaas , Bartosz Golaszewski , Saravana Kannan , Geert Uytterhoeven , Arnd Bergmann , Neil Armstrong , Marek Szyprowski , Alex Elder , Srini Kandagatla , Greg Kroah-Hartman , Abel Vesa , Manivannan Sadhasivam , Lukas Wunner , Dmitry Baryshkov Cc: linux-bluetooth@vger.kernel.org, netdev@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-wireless@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-pci@vger.kernel.org, linux-pm@vger.kernel.org, Bartosz Golaszewski Subject: [PATCH v5 18/18] PCI/pwrctl: add a PCI power control driver for power sequenced devices Date: Fri, 16 Feb 2024 21:32:15 +0100 Message-Id: <20240216203215.40870-19-brgl@bgdev.pl> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20240216203215.40870-1-brgl@bgdev.pl> References: <20240216203215.40870-1-brgl@bgdev.pl> Precedence: bulk X-Mailing-List: linux-wireless@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 From: Bartosz Golaszewski Add a PCI power control driver that's capable of correctly powering up devices using the power sequencing subsystem. The first user of this driver is the ath11k module on QCA6390. Signed-off-by: Bartosz Golaszewski --- drivers/pci/pwrctl/Kconfig | 9 +++ drivers/pci/pwrctl/Makefile | 1 + drivers/pci/pwrctl/pci-pwrctl-pwrseq.c | 84 ++++++++++++++++++++++++++ 3 files changed, 94 insertions(+) create mode 100644 drivers/pci/pwrctl/pci-pwrctl-pwrseq.c diff --git a/drivers/pci/pwrctl/Kconfig b/drivers/pci/pwrctl/Kconfig index b91170ebfb49..3880a88aa73b 100644 --- a/drivers/pci/pwrctl/Kconfig +++ b/drivers/pci/pwrctl/Kconfig @@ -5,6 +5,15 @@ menu "PCI Power control drivers" config PCI_PWRCTL tristate +config PCI_PWRCTL_PWRSEQ + tristate "PCI Power Control driver using the Power Sequencing subsystem" + select POWER_SEQUENCING + select PCI_PWRCTL + default m if (ATH11K_PCI && ARCH_QCOM) + help + Enable support for the PCI power control driver for device + drivers using the Power Sequencing subsystem. + config PCI_PWRCTL_WCN7850 tristate "PCI Power Control driver for WCN7850" select PCI_PWRCTL diff --git a/drivers/pci/pwrctl/Makefile b/drivers/pci/pwrctl/Makefile index de20c3af1b78..47ab9db1fb42 100644 --- a/drivers/pci/pwrctl/Makefile +++ b/drivers/pci/pwrctl/Makefile @@ -3,4 +3,5 @@ obj-$(CONFIG_PCI_PWRCTL) += pci-pwrctl-core.o pci-pwrctl-core-y := core.o +obj-$(CONFIG_PCI_PWRCTL_PWRSEQ) += pci-pwrctl-pwrseq.o obj-$(CONFIG_PCI_PWRCTL_WCN7850) += pci-pwrctl-wcn7850.o diff --git a/drivers/pci/pwrctl/pci-pwrctl-pwrseq.c b/drivers/pci/pwrctl/pci-pwrctl-pwrseq.c new file mode 100644 index 000000000000..43820a727b3f --- /dev/null +++ b/drivers/pci/pwrctl/pci-pwrctl-pwrseq.c @@ -0,0 +1,84 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (C) 2024 Linaro Ltd. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +struct pci_pwrctl_pwrseq_data { + struct pci_pwrctl ctx; + struct pwrseq_desc *pwrseq; +}; + +static void devm_pci_pwrctl_pwrseq_power_off(void *data) +{ + struct pwrseq_desc *pwrseq = data; + + pwrseq_power_off(pwrseq); +} + +static int pci_pwrctl_pwrseq_probe(struct platform_device *pdev) +{ + struct pci_pwrctl_pwrseq_data *data; + struct device *dev = &pdev->dev; + int ret; + + data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); + if (!data) + return -ENOMEM; + + data->pwrseq = devm_pwrseq_get(dev, of_device_get_match_data(dev)); + if (IS_ERR(data->pwrseq)) + return dev_err_probe(dev, PTR_ERR(data->pwrseq), + "Failed to get the power sequencer\n"); + + ret = pwrseq_power_on(data->pwrseq); + if (ret) + return dev_err_probe(dev, ret, + "Failed to power-on the device\n"); + + ret = devm_add_action_or_reset(dev, devm_pci_pwrctl_pwrseq_power_off, + data->pwrseq); + if (ret) + return ret; + + data->ctx.dev = dev; + + ret = devm_pci_pwrctl_device_set_ready(dev, &data->ctx); + if (ret) + return dev_err_probe(dev, ret, + "Failed to register the pwrctl wrapper\n"); + + return 0; +} + +static const struct of_device_id pci_pwrctl_pwrseq_of_match[] = { + { + /* ATH11K in QCA6390 package. */ + .compatible = "pci17cb,1101", + .data = "wlan", + }, + { } +}; +MODULE_DEVICE_TABLE(of, pci_pwrctl_pwrseq_of_match); + +static struct platform_driver pci_pwrctl_pwrseq_driver = { + .driver = { + .name = "pci-pwrctl-pwrseq", + .of_match_table = pci_pwrctl_pwrseq_of_match, + }, + .probe = pci_pwrctl_pwrseq_probe, +}; +module_platform_driver(pci_pwrctl_pwrseq_driver); + +MODULE_AUTHOR("Bartosz Golaszewski "); +MODULE_DESCRIPTION("Generic PCI Power Control module for power sequenced devices"); +MODULE_LICENSE("GPL");