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[209.132.180.67]) by mx.google.com with ESMTP id t124si17038144pgt.629.2017.08.02.03.13.03; Wed, 02 Aug 2017 03:13:04 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=pass header.i=@linaro.org header.b=U/ZUdu3X; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linaro.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752870AbdHBKNA (ORCPT + 25 others); Wed, 2 Aug 2017 06:13:00 -0400 Received: from mail-pf0-f172.google.com ([209.85.192.172]:36039 "EHLO mail-pf0-f172.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752820AbdHBKM5 (ORCPT ); Wed, 2 Aug 2017 06:12:57 -0400 Received: by mail-pf0-f172.google.com with SMTP id z129so19285297pfb.3 for ; Wed, 02 Aug 2017 03:12:56 -0700 (PDT) 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 :in-reply-to:references; bh=EhWBq9fcTg0cVmqOO3xYhUelkN5ezozYqIyR+ZDxbEg=; b=U/ZUdu3XU1+sOmZ60iqYN2fymZCE6lQNscvS66R/jCWv2j7a6raZvMtZDiZtS4IoGp DdgSMN4CQYmraQ+QrFghNCNTAZbV3PapzvgXkeqhzEiHeNh371MrBDM+qcHFO3sWExKZ P9Ha6Ujz9SPTVrjWLiyhBJrVI3pyalYisDzIw= 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:in-reply-to:references; bh=EhWBq9fcTg0cVmqOO3xYhUelkN5ezozYqIyR+ZDxbEg=; b=cdisXjBZJ1oxfA+7YL8x1gZ9/kwLQeg30/04wkHeItcxe54EEvYs3RrCUzvCt4TU+Y r/LG1UHooAB0OUnRNYg/wDqYyKgD+lFklAvbdZXntOZgZLKSUS3jqCNW+oEgPBP/aOky iuctcYpdXY2n1SV2km8t7UP2ILtjHkAJIthZGawOJrGIvzPVo8G4ap8J88Cby9O8xggb SE9GezyWLnKkGM27Toewqsmu0iC6w/84WAJtOAqaNtE3NzfwoORvLsHitW6PJB/v3Kft 9zmUiBqk6VhrByLH429jY62BCHUHlP7ZCM9QTvQO/3KXRj4EleJZXtUusoGxYi7NhiF8 CdFg== X-Gm-Message-State: AIVw110oheNNvAuPc696Bp+ptm5koQtkps9/QLh6qOiR1y4xQN1hBFFz HQJG779DT4idtm4k X-Received: by 10.98.153.72 with SMTP id d69mr21968278pfe.42.1501668776285; Wed, 02 Aug 2017 03:12:56 -0700 (PDT) Received: from localhost ([122.171.108.183]) by smtp.gmail.com with ESMTPSA id d4sm38706920pfj.59.2017.08.02.03.12.55 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 02 Aug 2017 03:12:55 -0700 (PDT) From: Viresh Kumar To: Rafael Wysocki , ulf.hansson@linaro.org, Kevin Hilman Cc: Viresh Kumar , linux-pm@vger.kernel.org, Vincent Guittot , Stephen Boyd , Nishanth Menon , robh+dt@kernel.org, lina.iyer@linaro.org, rnayak@codeaurora.org, sudeep.holla@arm.com, linux-kernel@vger.kernel.org, Len Brown , Pavel Machek , Andy Gross , David Brown Subject: [PATCH V9 4/7] soc: qcom: rpmpd: Add a powerdomain driver to model cx/mx powerdomains Date: Wed, 2 Aug 2017 15:42:35 +0530 Message-Id: X-Mailer: git-send-email 2.13.0.71.gd7076ec9c9cb In-Reply-To: References: In-Reply-To: References: Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Rajendra Nayak THIS IS TEST CODE, SHOULDN'T BE MERGED. The cx/mx powerdomains just pass the performance state set by the consumers to the RPM (Remote Power manager) which then takes care of setting the appropriate voltage on the corresponding rails to meet the performance needs. Add data for all powerdomains on msm8996. NOT-signed-off-by: Rajendra Nayak NOT-signed-off-by: Viresh Kumar --- .../devicetree/bindings/power/qcom,rpmpd.txt | 10 + arch/arm64/boot/dts/qcom/msm8996.dtsi | 5 + drivers/soc/qcom/Kconfig | 9 + drivers/soc/qcom/Makefile | 1 + drivers/soc/qcom/rpmpd.c | 307 +++++++++++++++++++++ 5 files changed, 332 insertions(+) create mode 100644 Documentation/devicetree/bindings/power/qcom,rpmpd.txt create mode 100644 drivers/soc/qcom/rpmpd.c -- 2.13.0.71.gd7076ec9c9cb diff --git a/Documentation/devicetree/bindings/power/qcom,rpmpd.txt b/Documentation/devicetree/bindings/power/qcom,rpmpd.txt new file mode 100644 index 000000000000..8b48ce57a563 --- /dev/null +++ b/Documentation/devicetree/bindings/power/qcom,rpmpd.txt @@ -0,0 +1,10 @@ +Qualcomm RPM Powerdomains + +* For RPM powerdomains, we communicate a performance state to RPM +which then translates it into a corresponding voltage on a rail + +Required Properties: + - compatible: Should be one of the following + * qcom,rpmpd-msm8996: RPM Powerdomain for the msm8996 family of SoC + - power-domain-cells: number of cells in power domain specifier + must be 1. diff --git a/arch/arm64/boot/dts/qcom/msm8996.dtsi b/arch/arm64/boot/dts/qcom/msm8996.dtsi index 8f085716e258..0ce9ea514cd1 100644 --- a/arch/arm64/boot/dts/qcom/msm8996.dtsi +++ b/arch/arm64/boot/dts/qcom/msm8996.dtsi @@ -418,6 +418,11 @@ status = "disabled"; }; + rpmpd: qcom,rpmpd { + compatible = "qcom,rpmpd-msm8996", "qcom,rpmpd"; + #power-domain-cells = <1>; + }; + sdhc2: sdhci@74a4900 { status = "disabled"; compatible = "qcom,sdhci-msm-v4"; diff --git a/drivers/soc/qcom/Kconfig b/drivers/soc/qcom/Kconfig index 9fca977ef18d..3892148be3c3 100644 --- a/drivers/soc/qcom/Kconfig +++ b/drivers/soc/qcom/Kconfig @@ -24,6 +24,15 @@ config QCOM_PM modes. It interface with various system drivers to put the cores in low power modes. +config QCOM_RPMPD + tristate "Qualcomm RPM Powerdomain driver" + depends on MFD_QCOM_RPM && QCOM_SMD_RPM + help + QCOM RPM powerdomain driver to support powerdomain with + performance states. The driver communicates a performance state + value to RPM which then translates it into corresponding voltage + for the voltage rail. + config QCOM_SMEM tristate "Qualcomm Shared Memory Manager (SMEM)" depends on ARCH_QCOM diff --git a/drivers/soc/qcom/Makefile b/drivers/soc/qcom/Makefile index 414f0de274fa..f7c3edfa6de8 100644 --- a/drivers/soc/qcom/Makefile +++ b/drivers/soc/qcom/Makefile @@ -7,3 +7,4 @@ obj-$(CONFIG_QCOM_SMEM_STATE) += smem_state.o obj-$(CONFIG_QCOM_SMP2P) += smp2p.o obj-$(CONFIG_QCOM_SMSM) += smsm.o obj-$(CONFIG_QCOM_WCNSS_CTRL) += wcnss_ctrl.o +obj-$(CONFIG_QCOM_RPMPD) += rpmpd.o diff --git a/drivers/soc/qcom/rpmpd.c b/drivers/soc/qcom/rpmpd.c new file mode 100644 index 000000000000..d34d9c363815 --- /dev/null +++ b/drivers/soc/qcom/rpmpd.c @@ -0,0 +1,307 @@ +/* + * Copyright (c) 2017, The Linux Foundation. All rights reserved. + * + * This software is licensed under the terms of the GNU General Public + * License version 2, as published by the Free Software Foundation, and + * may be copied, distributed, and modified under those terms. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include + +#define domain_to_rpmpd(domain) container_of(domain, struct rpmpd, pd) + +/* Resource types */ +#define RPMPD_SMPA 0x61706d73 +#define RPMPD_LDOA 0x616f646c + +/* Operation Keys */ +#define KEY_CORNER 0x6e726f63 /* corn */ +#define KEY_ENABLE 0x6e657773 /* swen */ +#define KEY_FLOOR_CORNER 0x636676 /* vfc */ + +#define DEFINE_RPMPD_CORN_SMPA(_platform, _name, _active, r_id) \ + static struct rpmpd _platform##_##_active; \ + static struct rpmpd _platform##_##_name = { \ + .pd = { .name = #_name, }, \ + .peer = &_platform##_##_active, \ + .res_type = RPMPD_SMPA, \ + .res_id = r_id, \ + .key = KEY_CORNER, \ + }; \ + static struct rpmpd _platform##_##_active = { \ + .pd = { .name = #_active, }, \ + .peer = &_platform##_##_name, \ + .active_only = true, \ + .res_type = RPMPD_SMPA, \ + .res_id = r_id, \ + .key = KEY_CORNER, \ + } + +#define DEFINE_RPMPD_CORN_LDOA(_platform, _name, r_id) \ + static struct rpmpd _platform##_##_name = { \ + .pd = { .name = #_name, }, \ + .res_type = RPMPD_LDOA, \ + .res_id = r_id, \ + .key = KEY_CORNER, \ + } + +#define DEFINE_RPMPD_VFC(_platform, _name, r_id, r_type) \ + static struct rpmpd _platform##_##_name = { \ + .pd = { .name = #_name, }, \ + .res_type = r_type, \ + .res_id = r_id, \ + .key = KEY_FLOOR_CORNER, \ + } + +#define DEFINE_RPMPD_VFC_SMPA(_platform, _name, r_id) \ + DEFINE_RPMPD_VFC(_platform, _name, r_id, RPMPD_SMPA) + +#define DEFINE_RPMPD_VFC_LDOA(_platform, _name, r_id) \ + DEFINE_RPMPD_VFC(_platform, _name, r_id, RPMPD_LDOA) + +struct rpmpd_req { + __le32 key; + __le32 nbytes; + __le32 value; +}; + +struct rpmpd { + struct generic_pm_domain pd; + struct rpmpd *peer; + const bool active_only; + unsigned long corner; + bool enabled; + const char *res_name; + const int res_type; + const int res_id; + struct qcom_smd_rpm *rpm; + __le32 key; +}; + +struct rpmpd_desc { + struct rpmpd **rpmpds; + size_t num_pds; +}; + +static DEFINE_MUTEX(rpmpd_lock); + +/* msm8996 RPM powerdomains */ +DEFINE_RPMPD_CORN_SMPA(msm8996, vddcx, vddcx_ao, 1); +DEFINE_RPMPD_CORN_SMPA(msm8996, vddmx, vddmx_ao, 2); +DEFINE_RPMPD_CORN_LDOA(msm8996, vddsscx, 26); + +DEFINE_RPMPD_VFC_SMPA(msm8996, vddcx_vfc, 1); +DEFINE_RPMPD_VFC_LDOA(msm8996, vddsscx_vfc, 26); + +static struct rpmpd *msm8996_rpmpds[] = { + [0] = &msm8996_vddcx, + [1] = &msm8996_vddcx_ao, + [2] = &msm8996_vddcx_vfc, + [3] = &msm8996_vddmx, + [4] = &msm8996_vddmx_ao, + [5] = &msm8996_vddsscx, + [6] = &msm8996_vddsscx_vfc, +}; + +static const struct rpmpd_desc msm8996_desc = { + .rpmpds = msm8996_rpmpds, + .num_pds = ARRAY_SIZE(msm8996_rpmpds), +}; + +static const struct of_device_id rpmpd_match_table[] = { + { .compatible = "qcom,rpmpd-msm8996", .data = &msm8996_desc }, + { } +}; +MODULE_DEVICE_TABLE(of, rpmpd_match_table); + +static int rpmpd_send_enable(struct rpmpd *pd, bool enable) +{ + struct rpmpd_req req = { + .key = KEY_ENABLE, + .nbytes = cpu_to_le32(sizeof(u32)), + .value = cpu_to_le32(enable), + }; + + return qcom_rpm_smd_write(pd->rpm, QCOM_RPM_ACTIVE_STATE, pd->res_type, + pd->res_id, &req, sizeof(req)); +} + +static int rpmpd_send_corner(struct rpmpd *pd, int state, unsigned int corner) +{ + struct rpmpd_req req = { + .key = pd->key, + .nbytes = cpu_to_le32(sizeof(u32)), + .value = cpu_to_le32(corner), + }; + + return qcom_rpm_smd_write(pd->rpm, state, pd->res_type, pd->res_id, + &req, sizeof(req)); +}; + +static void to_active_sleep(struct rpmpd *pd, unsigned long corner, + unsigned long *active, unsigned long *sleep) +{ + *active = corner; + + if (pd->active_only) + *sleep = 0; + else + *sleep = *active; +} + +static int rpmpd_aggregate_corner(struct rpmpd *pd) +{ + int ret; + struct rpmpd *peer = pd->peer; + unsigned long active_corner, sleep_corner; + unsigned long this_corner = 0, this_sleep_corner = 0; + unsigned long peer_corner = 0, peer_sleep_corner = 0; + + to_active_sleep(pd, pd->corner, &this_corner, &this_sleep_corner); + + if (peer && peer->enabled) + to_active_sleep(peer, peer->corner, &peer_corner, + &peer_sleep_corner); + + active_corner = max(this_corner, peer_corner); + + ret = rpmpd_send_corner(pd, QCOM_RPM_ACTIVE_STATE, active_corner); + if (ret) + return ret; + + sleep_corner = max(this_sleep_corner, peer_sleep_corner); + + return rpmpd_send_corner(pd, QCOM_RPM_SLEEP_STATE, sleep_corner); +} + +static int rpmpd_power_on(struct generic_pm_domain *domain) +{ + int ret; + struct rpmpd *pd = domain_to_rpmpd(domain); + + mutex_lock(&rpmpd_lock); + + ret = rpmpd_send_enable(pd, true); + if (ret) + goto out; + + pd->enabled = true; + + if (pd->corner) + ret = rpmpd_aggregate_corner(pd); + +out: + mutex_unlock(&rpmpd_lock); + + return ret; +} + +static int rpmpd_power_off(struct generic_pm_domain *domain) +{ + int ret; + struct rpmpd *pd = domain_to_rpmpd(domain); + + mutex_lock(&rpmpd_lock); + + ret = rpmpd_send_enable(pd, false); + if (!ret) + pd->enabled = false; + + mutex_unlock(&rpmpd_lock); + + return ret; +} + +static int rpmpd_probe(struct platform_device *pdev) +{ + int i; + size_t num; + struct genpd_onecell_data *data; + struct qcom_smd_rpm *rpm; + struct rpmpd **rpmpds; + const struct rpmpd_desc *desc; + + rpm = dev_get_drvdata(pdev->dev.parent); + if (!rpm) { + dev_err(&pdev->dev, "Unable to retrieve handle to RPM\n"); + return -ENODEV; + } + + desc = of_device_get_match_data(&pdev->dev); + if (!desc) + return -EINVAL; + + rpmpds = desc->rpmpds; + num = desc->num_pds; + + data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL); + if (!data) + return -ENOMEM; + + data->domains = devm_kcalloc(&pdev->dev, num, sizeof(*data->domains), + GFP_KERNEL); + data->num_domains = num; + + for (i = 0; i < num; i++) { + if (!rpmpds[i]) + continue; + + rpmpds[i]->rpm = rpm; + rpmpds[i]->pd.power_off = rpmpd_power_off; + rpmpds[i]->pd.power_on = rpmpd_power_on; + pm_genpd_init(&rpmpds[i]->pd, NULL, true); + + data->domains[i] = &rpmpds[i]->pd; + } + + return of_genpd_add_provider_onecell(pdev->dev.of_node, data); +} + +static int rpmpd_remove(struct platform_device *pdev) +{ + of_genpd_del_provider(pdev->dev.of_node); + return 0; +} + +static struct platform_driver rpmpd_driver = { + .driver = { + .name = "qcom-rpmpd", + .of_match_table = rpmpd_match_table, + }, + .probe = rpmpd_probe, + .remove = rpmpd_remove, +}; + +static int __init rpmpd_init(void) +{ + return platform_driver_register(&rpmpd_driver); +} +core_initcall(rpmpd_init); + +static void __exit rpmpd_exit(void) +{ + platform_driver_unregister(&rpmpd_driver); +} +module_exit(rpmpd_exit); + +MODULE_DESCRIPTION("Qualcomm RPM Power Domain Driver"); +MODULE_LICENSE("GPL v2"); +MODULE_ALIAS("platform:qcom-rpmpd");