From patchwork Wed Jan 13 16:00:53 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Baryshkov X-Patchwork-Id: 12017239 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-18.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A7511C433DB for ; Wed, 13 Jan 2021 16:02:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 5100B2360D for ; Wed, 13 Jan 2021 16:02:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727117AbhAMQCU (ORCPT ); Wed, 13 Jan 2021 11:02:20 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56950 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726398AbhAMQCT (ORCPT ); Wed, 13 Jan 2021 11:02:19 -0500 Received: from mail-lj1-x22c.google.com (mail-lj1-x22c.google.com [IPv6:2a00:1450:4864:20::22c]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D53BDC0617A3 for ; Wed, 13 Jan 2021 08:01:01 -0800 (PST) Received: by mail-lj1-x22c.google.com with SMTP id m13so3089076ljo.11 for ; Wed, 13 Jan 2021 08:01:01 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=dk89QtY9XlOJ4lSbFodbDfjmlfoZzf3XCi+vMFHgHok=; b=Qm+ezvQ7s08d9MpJdq4Y3FKAMzw6lp513zYHOAe6axP4DV9m2sJUuHqT4pfk9XQUMa jRgATKLWv82AyTUDo2RMJCJh9NUrohx/iTPHjPBVe63V7w2Gl3QR019VlXxjjoAvHHjl WwY3VVh7ag2qaUrOVO9KQHIFrCmcR+v9qF/2iOBRHpeydKsNblfG011IWkBtm7x5Sup3 5zuYBpIvyZayisuXgbUvKXhRH299qQdfhX/83J7/RbLxc7yKgiCM7CDS92Ki6CAIDMQ0 VTLVuHrfqLQKEBmvTTLjgl3xgVrhEAImyOtiQkxW7iFtwqXYnFvuo7FQ4suFvIXHglh9 bkxQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=dk89QtY9XlOJ4lSbFodbDfjmlfoZzf3XCi+vMFHgHok=; b=ZBVr7Hlo/FQCsMHyG8LDnopLV5cxswoeFExKBb06BSMQhb+4mN983yQaNDB4nRtGg2 k7OVW0slsA/9MLmCtTlO6VoGX/4Fpr45bVxAsdS6NsoOYW+H0r2aL+Kuiv2iIwmXb3vg tLIBan5Q1Xm5yjIphhRkuKU2oTeD9wtzsdnnhZhqIRGEWZ1CjY6GTPGm1u9YktbRZaaS EID/+TjH/1TOIu3J3wG7oqiZstBa622FrzqgmwH2f6hQuN/UJRODtWLqFXIX0V22YyUc HraFs8+hU6WOtgsaI3lIjrBZUVlX2cdfGgPl1X9lQYQssLHuqCJk9S6+EBsqau74C9O4 Te8Q== X-Gm-Message-State: AOAM533cMBKGyzXwBJ4TORFgl47QRvnYwnkWvW9YeEaWFOCjBra6cW7B W5o+t2N+MUDv0tMWeKqOZVEZNFliE7GutQ== X-Google-Smtp-Source: ABdhPJw2vvlK8lnsVND9AAEYRqTeYKz+L8Y4KXyNFcwcvGaPqogUWOPcS06L1wJVjedQ+HMKTSEp2w== X-Received: by 2002:a2e:97ce:: with SMTP id m14mr1254872ljj.380.1610553660262; Wed, 13 Jan 2021 08:01:00 -0800 (PST) Received: from eriador.lumag.spb.ru ([94.25.228.189]) by smtp.gmail.com with ESMTPSA id m25sm248559lfb.144.2021.01.13.08.00.58 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 13 Jan 2021 08:00:59 -0800 (PST) From: Dmitry Baryshkov To: Andy Gross , Bjorn Andersson , Rob Herring , Arnd Bergmann , Greg Kroah-Hartman Cc: linux-arm-msm@vger.kernel.org, Manivannan Sadhasivam , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 2/2] misc: qca639x: add support for QCA639x powerup sequence Date: Wed, 13 Jan 2021 19:00:53 +0300 Message-Id: <20210113160053.3974229-3-dmitry.baryshkov@linaro.org> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20210113160053.3974229-1-dmitry.baryshkov@linaro.org> References: <20210113160053.3974229-1-dmitry.baryshkov@linaro.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Qualcomm QCA639x is a family of WiFi + Bluetooth SoCs, with BT part being controlled through the UART and WiFi being present on PCIe bus. Both blocks share common power sources. Add device driver handling power sequencing of QCA6390/1. Signed-off-by: Dmitry Baryshkov --- drivers/misc/Kconfig | 12 +++ drivers/misc/Makefile | 1 + drivers/misc/qcom-qca639x.c | 164 ++++++++++++++++++++++++++++++++++++ 3 files changed, 177 insertions(+) create mode 100644 drivers/misc/qcom-qca639x.c diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig index e90c2524e46c..a14f67ab476c 100644 --- a/drivers/misc/Kconfig +++ b/drivers/misc/Kconfig @@ -255,6 +255,18 @@ config QCOM_FASTRPC applications DSP processor. Say M if you want to enable this module. +config QCOM_QCA639X + tristate "Qualcomm QCA639x WiFi/Bluetooth module support" + depends on REGULATOR && PM_GENERIC_DOMAINS + help + If you say yes to this option, support will be included for Qualcomm + QCA639x family of WiFi and Bluetooth SoCs. Note, this driver supports + only power control for this SoC, you still have to enable individual + Bluetooth and WiFi drivers. + + Say M here if you want to include support for QCA639x chips as a + module. This will build a module called "qcom-qca639x". + config SGI_GRU tristate "SGI GRU driver" depends on X86_UV && SMP diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile index f65e8b18ecd8..bf21d5b1189f 100644 --- a/drivers/misc/Makefile +++ b/drivers/misc/Makefile @@ -18,6 +18,7 @@ obj-$(CONFIG_TIFM_7XX1) += tifm_7xx1.o obj-$(CONFIG_PHANTOM) += phantom.o obj-$(CONFIG_QCOM_COINCELL) += qcom-coincell.o obj-$(CONFIG_QCOM_FASTRPC) += fastrpc.o +obj-$(CONFIG_QCOM_QCA639X) += qcom-qca639x.o obj-$(CONFIG_SENSORS_BH1770) += bh1770glc.o obj-$(CONFIG_SENSORS_APDS990X) += apds990x.o obj-$(CONFIG_ENCLOSURE_SERVICES) += enclosure.o diff --git a/drivers/misc/qcom-qca639x.c b/drivers/misc/qcom-qca639x.c new file mode 100644 index 000000000000..b34e08ff4a88 --- /dev/null +++ b/drivers/misc/qcom-qca639x.c @@ -0,0 +1,164 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2020, Linaro Limited + */ +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define MAX_NUM_REGULATORS 8 + +static struct vreg { + const char *name; + unsigned int load_uA; +} vregs[MAX_NUM_REGULATORS] = { + /* 2.0 V */ + { "vddpcie2", 15000 }, + { "vddrfa3", 400000 }, + + /* 0.95 V */ + { "vddaon", 100000 }, + { "vddpmu", 1250000 }, + { "vddrfa1", 200000 }, + + /* 1.35 V */ + { "vddrfa2", 400000 }, + { "vddpcie1", 35000 }, + + /* 1.8 V */ + { "vddio", 20000 }, +}; + +struct qca639x_data { + struct regulator_bulk_data regulators[MAX_NUM_REGULATORS]; + size_t num_vregs; + struct device *dev; + struct pinctrl_state *active_state; + struct generic_pm_domain pd; +}; + +#define domain_to_data(domain) container_of(domain, struct qca639x_data, pd) + +static int qca639x_power_on(struct generic_pm_domain *domain) +{ + struct qca639x_data *data = domain_to_data(domain); + int ret; + + ret = regulator_bulk_enable(data->num_vregs, data->regulators); + if (ret) { + dev_err(data->dev, "Failed to enable regulators"); + return ret; + } + + /* Wait for 1ms before toggling enable pins. */ + usleep_range(1000, 2000); + + ret = pinctrl_select_state(data->dev->pins->p, data->active_state); + if (ret) { + dev_err(data->dev, "Failed to select active state"); + return ret; + } + + /* Wait for all power levels to stabilize */ + usleep_range(6000, 7000); + + return 0; +} + +static int qca639x_power_off(struct generic_pm_domain *domain) +{ + struct qca639x_data *data = domain_to_data(domain); + + pinctrl_select_default_state(data->dev); + regulator_bulk_disable(data->num_vregs, data->regulators); + + return 0; +} + +static int qca639x_probe(struct platform_device *pdev) +{ + struct qca639x_data *data; + struct device *dev = &pdev->dev; + int i, ret; + + if (!dev->pins || IS_ERR_OR_NULL(dev->pins->default_state)) + return -EINVAL; + + data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); + if (!data) + return -ENOMEM; + + data->dev = dev; + data->num_vregs = ARRAY_SIZE(vregs); + + data->active_state = pinctrl_lookup_state(dev->pins->p, "active"); + if (IS_ERR(data->active_state)) { + ret = PTR_ERR(data->active_state); + dev_err(dev, "Failed to get active_state: %d\n", ret); + return ret; + } + + for (i = 0; i < data->num_vregs; i++) + data->regulators[i].supply = vregs[i].name; + ret = devm_regulator_bulk_get(dev, data->num_vregs, data->regulators); + if (ret < 0) + return ret; + + for (i = 0; i < data->num_vregs; i++) { + ret = regulator_set_load(data->regulators[i].consumer, vregs[i].load_uA); + if (ret) + return ret; + } + + data->pd.name = dev_name(dev); + data->pd.power_on = qca639x_power_on; + data->pd.power_off = qca639x_power_off; + + ret = pm_genpd_init(&data->pd, NULL, true); + if (ret < 0) + return ret; + + ret = of_genpd_add_provider_simple(dev->of_node, &data->pd); + if (ret < 0) { + pm_genpd_remove(&data->pd); + return ret; + } + + platform_set_drvdata(pdev, data); + + return 0; +} + +static int qca639x_remove(struct platform_device *pdev) +{ + struct qca639x_data *data = platform_get_drvdata(pdev); + + pm_genpd_remove(&data->pd); + + return 0; +} + +static const struct of_device_id qca639x_of_match[] = { + { .compatible = "qcom,qca6390" }, +}; + +static struct platform_driver qca639x_driver = { + .probe = qca639x_probe, + .remove = qca639x_remove, + .driver = { + .name = "qca639x", + .of_match_table = qca639x_of_match, + }, +}; + +module_platform_driver(qca639x_driver); +MODULE_AUTHOR("Dmitry Baryshkov "); +MODULE_DESCRIPTION("Power control for Qualcomm QCA639x BT/WiFi chip"); +MODULE_LICENSE("GPL v2");