From patchwork Mon Mar 25 13:16:24 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bartosz Golaszewski X-Patchwork-Id: 13602153 Received: from mail-wr1-f53.google.com (mail-wr1-f53.google.com [209.85.221.53]) (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 D7F88157E73 for ; Mon, 25 Mar 2024 13:17:23 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.221.53 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1711372648; cv=none; b=AZqdjGcJwTORxcHa9lbhgdTUlm7wg2hIDW6oU/wXnevl45z5pey1BuwnOgFtvPpg2iwtPBCtRmLh4XlPHmTQbmKDv6OjmfWFhKUBFt4k1M1kgd6zgsnUaV7rmBgEs2AId6mvWjpQciE5lwdM7EXtsYD3q2Gl3GyBFiH+LLpqzBI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1711372648; c=relaxed/simple; bh=nYwGcUeSu2lOGz0Fbu3qFb7BX7DjJR5EiBYQwBjfl1E=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=TP4y6uPwHs5VHxUgAQf3jqtgFhKSGm9HTJfRzyo/TWYnYPyaZa4hg8aKipCTiU6RrZzKUmZETnm4gJGu9dB2Px1znaESql6wV3z9xp+k/6HVrrj+jpIUEcBVXCSJ9uUgawbXfwn8pGE6BGkG0T53oLRjcYs+DEMoe1TN8bRdueA= 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=r1BtkEeS; arc=none smtp.client-ip=209.85.221.53 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="r1BtkEeS" Received: by mail-wr1-f53.google.com with SMTP id ffacd0b85a97d-34175878e3cso3089725f8f.0 for ; Mon, 25 Mar 2024 06:17:22 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bgdev-pl.20230601.gappssmtp.com; s=20230601; t=1711372641; x=1711977441; 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=5q7lk+2TIXEIJZSxUoCWXqCmqzprQnmyhj7L+zSgmo8=; b=r1BtkEeSlKjiSt2MUfvytWTnMY2jEy7RElifeZbH0pqf9X8qlWyTdVVIN4jrWMvUPG fb9JJ6tdASUESlHb/67kPDQrqEspug01Gwf7tXhYcHFTZXP0BhXmYNuvIJrNeztWlNJc 003smVOaGc5Fsw9/3fjC/snNanXrI9feA5GTVO4B0+QpR7/AmdOCMjPlFilU1oeTo9rA AoEdB2KFiVyIsitGH8JXhzcNF16PJ0+Otf1yYpunc5G9kKziu6KqhZZRWdB3OXP9gO6u ej3AqfSXBMOrqRRelOFxhpzl8O2Y8LdzpZFrm+XfZaSFVZGOg+0e5aS0ywR35SQAqzwR AdIg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1711372641; x=1711977441; 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=5q7lk+2TIXEIJZSxUoCWXqCmqzprQnmyhj7L+zSgmo8=; b=auLFDIsBtYL81DNKVthHKgZVHKyodCcO7zSb3BGtHZtYU4ItlnY9btybDIQRtmvake Og6ULtpcnpV8xzauzToHiYOL8RFOFGDvUtshklkS7zg/mrbvIowzq/HKSAk6co9xPPCL T5fgKak/QYUJps4cej/enJJ9vsjzCJfRLKul7hzBssRd1dea4+0Wa0nN6OCjQLfpmkPc 46e7EZvB0pfpbd8ZHNCsr3dg0j6lYcsFFho2c5ZHn+kB7hjv63MQIFne8E9jKtDa3Ysu l7rPs+PSQlXLTWO6yNdjEFBc2ndEePs6NoiRJPu7OEF1b6gKXWCvHXsavwgOLoZdQDwq TU+A== X-Gm-Message-State: AOJu0YxZ113s6cfe9HVX+dQ7/NYX34qLep/NkAxA4bIWarHQNgcLkBel EuW/8Y1wbwT47KjpFqPmzuG53MSclZypQ6naZ2JYEQ5daDInI1L6y9H6HgzFrzo= X-Google-Smtp-Source: AGHT+IEWAleZxrehHkAeog/CpCY+3Uky4Inx/OcRTu69F57KovJSV1TsaOT5odfmaMTbK0CJCnSfiQ== X-Received: by 2002:a5d:6986:0:b0:341:bdbf:ce0f with SMTP id g6-20020a5d6986000000b00341bdbfce0fmr4644057wru.34.1711372640881; Mon, 25 Mar 2024 06:17:20 -0700 (PDT) Received: from brgl-uxlite.home ([2a01:cb1d:75a:e000:861d:8b72:a859:4ce9]) by smtp.gmail.com with ESMTPSA id p11-20020a056000018b00b0033e75e5f280sm9485245wrx.113.2024.03.25.06.17.19 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 25 Mar 2024 06:17:20 -0700 (PDT) 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 v6 16/16] PCI/pwrctl: add a PCI power control driver for power sequenced devices Date: Mon, 25 Mar 2024 14:16:24 +0100 Message-Id: <20240325131624.26023-17-brgl@bgdev.pl> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20240325131624.26023-1-brgl@bgdev.pl> References: <20240325131624.26023-1-brgl@bgdev.pl> Precedence: bulk X-Mailing-List: linux-bluetooth@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 | 2 + drivers/pci/pwrctl/pci-pwrctl-pwrseq.c | 89 ++++++++++++++++++++++++++ 3 files changed, 100 insertions(+) create mode 100644 drivers/pci/pwrctl/pci-pwrctl-pwrseq.c diff --git a/drivers/pci/pwrctl/Kconfig b/drivers/pci/pwrctl/Kconfig index 96195395af69..eb126225eb9f 100644 --- a/drivers/pci/pwrctl/Kconfig +++ b/drivers/pci/pwrctl/Kconfig @@ -5,4 +5,13 @@ 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. + endmenu diff --git a/drivers/pci/pwrctl/Makefile b/drivers/pci/pwrctl/Makefile index 52ae0640ef7b..d308aae4800c 100644 --- a/drivers/pci/pwrctl/Makefile +++ b/drivers/pci/pwrctl/Makefile @@ -2,3 +2,5 @@ obj-$(CONFIG_PCI_PWRCTL) += pci-pwrctl-core.o pci-pwrctl-core-y := core.o + +obj-$(CONFIG_PCI_PWRCTL_PWRSEQ) += pci-pwrctl-pwrseq.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..c7a113a76c0c --- /dev/null +++ b/drivers/pci/pwrctl/pci-pwrctl-pwrseq.c @@ -0,0 +1,89 @@ +// 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", + }, + { + /* ATH12K in WCN7850 package. */ + .compatible = "pci17cb,1107", + .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");