From mboxrd@z Thu Jan 1 00:00:00 1970 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=-8.8 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham 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 EBCDDC43387 for ; Wed, 9 Jan 2019 09:04:57 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A7C3B206BB for ; Wed, 9 Jan 2019 09:04:57 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="key not found in DNS" (0-bit key) header.d=codeaurora.org header.i=@codeaurora.org header.b="AzS+VAtu"; dkim=fail reason="key not found in DNS" (0-bit key) header.d=codeaurora.org header.i=@codeaurora.org header.b="SI6M1gf2" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729965AbfAIJEz (ORCPT ); Wed, 9 Jan 2019 04:04:55 -0500 Received: from smtp.codeaurora.org ([198.145.29.96]:53434 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729284AbfAIJEx (ORCPT ); Wed, 9 Jan 2019 04:04:53 -0500 Received: by smtp.codeaurora.org (Postfix, from userid 1000) id 7F12F60A0A; Wed, 9 Jan 2019 09:04:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1547024692; bh=57gr/az9SFOE/1nz1OQJMhzACAdFL0n2T6OPEE7LpWA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=AzS+VAtu0drw16TNwXkWvknH6n0aX+UB9SO7q8NZBDAfrR/e7XP+aeImFYj+Z1I9a 5iw71TohkIgcs/666eqfayANhzWhdx5BY35LfCNZQl2nU8zOVALIUtMp0c5Q4bAIex clDR3wnldThhl6HmL9fUuN1BG7hmHMVOO5Twj8qM= Received: from blr-ubuntu-173.qualcomm.com (blr-bdr-fw-01_globalnat_allzones-outside.qualcomm.com [103.229.18.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: rnayak@smtp.codeaurora.org) by smtp.codeaurora.org (Postfix) with ESMTPSA id A0B21609BD; Wed, 9 Jan 2019 09:04:45 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1547024689; bh=57gr/az9SFOE/1nz1OQJMhzACAdFL0n2T6OPEE7LpWA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=SI6M1gf2GiW9rJyqLGsg6XkYAa+mnSv8yvpijPqisSU4S1yix0K7r4LwlSvZR4xIK ybEgly6pCo6Fih2r0WI4D5k+Q1cxyhvETVRetXVsu3gEPrHH27vCoyss5V193TxrPx 2ziumbz0lfPOWi3+DuWl5zM0JAV5q8+vK2NytgDI= DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org A0B21609BD Authentication-Results: pdx-caf-mail.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: pdx-caf-mail.web.codeaurora.org; spf=none smtp.mailfrom=rnayak@codeaurora.org From: Rajendra Nayak To: andy.gross@linaro.org, robh@kernel.org, viresh.kumar@linaro.org, sboyd@kernel.org, ulf.hansson@linaro.org, collinsd@codeaurora.org, mka@chromium.org Cc: devicetree@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, henryc.chen@mediatek.com, Rajendra Nayak Subject: [PATCH v10 4/9] soc: qcom: rpmpd: Add a Power domain driver to model corners Date: Wed, 9 Jan 2019 14:34:15 +0530 Message-Id: <20190109090420.8100-5-rnayak@codeaurora.org> X-Mailer: git-send-email 2.19.1 In-Reply-To: <20190109090420.8100-1-rnayak@codeaurora.org> References: <20190109090420.8100-1-rnayak@codeaurora.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The Power domains for corners 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. We add all power domain data needed on msm8996 here. This driver can easily be extended by adding data for other qualcomm SoCs as well. Signed-off-by: Rajendra Nayak Signed-off-by: Viresh Kumar Reviewed-by: Ulf Hansson Acked-by: Rob Herring Reviewed-by: Stephen Boyd --- drivers/soc/qcom/Kconfig | 9 ++ drivers/soc/qcom/Makefile | 1 + drivers/soc/qcom/rpmpd.c | 282 ++++++++++++++++++++++++++++++++++++++ 3 files changed, 292 insertions(+) create mode 100644 drivers/soc/qcom/rpmpd.c diff --git a/drivers/soc/qcom/Kconfig b/drivers/soc/qcom/Kconfig index fcbf8a2e4080..df5cd9fa0d5e 100644 --- a/drivers/soc/qcom/Kconfig +++ b/drivers/soc/qcom/Kconfig @@ -98,6 +98,15 @@ config QCOM_RPMH of hardware components aggregate requests for these resources and help apply the aggregated state on the resource. +config QCOM_RPMPD + bool "Qualcomm RPM Power domain driver" + depends on MFD_QCOM_RPM && QCOM_SMD_RPM + help + QCOM RPM Power domain driver to support power-domains 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 || COMPILE_TEST diff --git a/drivers/soc/qcom/Makefile b/drivers/soc/qcom/Makefile index f25b54cd6cf8..f1b25fdcf2ad 100644 --- a/drivers/soc/qcom/Makefile +++ b/drivers/soc/qcom/Makefile @@ -21,3 +21,4 @@ obj-$(CONFIG_QCOM_WCNSS_CTRL) += wcnss_ctrl.o obj-$(CONFIG_QCOM_APR) += apr.o obj-$(CONFIG_QCOM_LLCC) += llcc-slice.o obj-$(CONFIG_QCOM_SDM845_LLCC) += llcc-sdm845.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..7715ba7c9157 --- /dev/null +++ b/drivers/soc/qcom/rpmpd.c @@ -0,0 +1,282 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright (c) 2017-2018, The Linux Foundation. All rights reserved. */ + +#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_CORNER_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_CORNER_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 int 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 Power domains */ +DEFINE_RPMPD_CORNER_SMPA(msm8996, vddcx, vddcx_ao, 1); +DEFINE_RPMPD_CORNER_SMPA(msm8996, vddmx, vddmx_ao, 2); +DEFINE_RPMPD_CORNER_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[] = { + [MSM8996_VDDCX] = &msm8996_vddcx, + [MSM8996_VDDCX_AO] = &msm8996_vddcx_ao, + [MSM8996_VDDCX_VFC] = &msm8996_vddcx_vfc, + [MSM8996_VDDMX] = &msm8996_vddmx, + [MSM8996_VDDMX_AO] = &msm8996_vddmx_ao, + [MSM8996_VDDSSCX] = &msm8996_vddsscx, + [MSM8996_VDDSSCX_VFC] = &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,msm8996-rpmpd", .data = &msm8996_desc }, + { } +}; + +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 int corner, + unsigned int *active, unsigned int *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 int active_corner, sleep_corner; + unsigned int this_active_corner = 0, this_sleep_corner = 0; + unsigned int peer_active_corner = 0, peer_sleep_corner = 0; + + to_active_sleep(pd, pd->corner, &this_active_corner, &this_sleep_corner); + + if (peer && peer->enabled) + to_active_sleep(peer, peer->corner, &peer_active_corner, + &peer_sleep_corner); + + active_corner = max(this_active_corner, peer_active_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]) { + dev_warn(&pdev->dev, "rpmpds[] with empty entry at index=%d\n", + 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 struct platform_driver rpmpd_driver = { + .driver = { + .name = "qcom-rpmpd", + .of_match_table = rpmpd_match_table, + .suppress_bind_attrs = true, + }, + .probe = rpmpd_probe, +}; + +static int __init rpmpd_init(void) +{ + return platform_driver_register(&rpmpd_driver); +} +core_initcall(rpmpd_init); -- QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation