From patchwork Fri Aug 23 08:17:01 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Maulik Shah X-Patchwork-Id: 11110981 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 8ED1E13B1 for ; Fri, 23 Aug 2019 08:19:09 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6215323400 for ; Fri, 23 Aug 2019 08:19:09 +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="fUmKLE97"; dkim=fail reason="key not found in DNS" (0-bit key) header.d=codeaurora.org header.i=@codeaurora.org header.b="ZtlaD9cm" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2390296AbfHWITF (ORCPT ); Fri, 23 Aug 2019 04:19:05 -0400 Received: from smtp.codeaurora.org ([198.145.29.96]:42884 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388157AbfHWITF (ORCPT ); Fri, 23 Aug 2019 04:19:05 -0400 Received: by smtp.codeaurora.org (Postfix, from userid 1000) id 79EDF6134E; Fri, 23 Aug 2019 08:19:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1566548343; bh=f9+L1S/oxug5+XvvcnT0WdQnw1VBAaIa4ENDAd7vMzs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=fUmKLE97gYB1KeJz/GBxXtnPuTpF/zBDXFFluq+nzic5dCejOjbOal60ax8qYNmkA HjRDGXUY/6Gaiq66s/3QxJ7Yvy19gsJkH+vpROP+isHDF9TYaz2ibbXJzx90jcYZ6k LPRzDjmfHML2TIzefhzIM0cHSLupX7o3bmJPTKjI= X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on pdx-caf-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.7 required=2.0 tests=ALL_TRUSTED,BAYES_00, DKIM_INVALID,DKIM_SIGNED,SPF_NONE autolearn=no autolearn_force=no version=3.4.0 Received: from mkshah-linux.qualcomm.com (blr-c-bdr-fw-01_globalnat_allzones-outside.qualcomm.com [103.229.19.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: mkshah@smtp.codeaurora.org) by smtp.codeaurora.org (Postfix) with ESMTPSA id 3BB286137E; Fri, 23 Aug 2019 08:18:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1566548341; bh=f9+L1S/oxug5+XvvcnT0WdQnw1VBAaIa4ENDAd7vMzs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ZtlaD9cmlu/Aecqp7gwnlJaHUcmU7geOfNVUeqeyWswFlSiYYPqrV6TmNWD1tmuFg rcuojtFG8TXxcnaK7SU58wnBfgvzKA4GEgSNB3UtxO8fznexWoP6N2UuzyVq+gtc9g DEt2bk0pUpXawvUj8/iaI+kc8bmeWlLgdi+arB8k= DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 3BB286137E 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=mkshah@codeaurora.org From: Maulik Shah To: swboyd@chromium.org, agross@kernel.org, david.brown@linaro.org, linux-arm-msm@vger.kernel.org Cc: linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, bjorn.andersson@linaro.org, evgreen@chromium.org, dianders@chromium.org, rnayak@codeaurora.org, ilina@codeaurora.org, lsrao@codeaurora.org, ulf.hansson@linaro.org, Maulik Shah Subject: [PATCH v2 4/6] drivers: qcom: rpmh-rsc: Add RSC power domain support Date: Fri, 23 Aug 2019 13:47:01 +0530 Message-Id: <20190823081703.17325-5-mkshah@codeaurora.org> X-Mailer: git-send-email 2.22.0 In-Reply-To: <20190823081703.17325-1-mkshah@codeaurora.org> References: <20190823081703.17325-1-mkshah@codeaurora.org> MIME-Version: 1.0 Sender: linux-arm-msm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Add RSC power domain support. RSC is top level power domain in hireachical CPU LPM modes. Once the rsc domain is down flush all cached sleep and wake votes from controller. Signed-off-by: Maulik Shah --- drivers/soc/qcom/rpmh-internal.h | 2 + drivers/soc/qcom/rpmh-rsc.c | 84 ++++++++++++++++++++++++++++++++ 2 files changed, 86 insertions(+) diff --git a/drivers/soc/qcom/rpmh-internal.h b/drivers/soc/qcom/rpmh-internal.h index 6eec32b97f83..3736c148effc 100644 --- a/drivers/soc/qcom/rpmh-internal.h +++ b/drivers/soc/qcom/rpmh-internal.h @@ -8,6 +8,7 @@ #define __RPM_INTERNAL_H__ #include +#include #include #define TCS_TYPE_NR 4 @@ -102,6 +103,7 @@ struct rsc_drv { DECLARE_BITMAP(tcs_in_use, MAX_TCS_NR); spinlock_t lock; struct rpmh_ctrlr client; + struct generic_pm_domain rsc_pd; }; int rpmh_rsc_send_data(struct rsc_drv *drv, const struct tcs_request *msg); diff --git a/drivers/soc/qcom/rpmh-rsc.c b/drivers/soc/qcom/rpmh-rsc.c index e278fc11fe5c..884b39599e8f 100644 --- a/drivers/soc/qcom/rpmh-rsc.c +++ b/drivers/soc/qcom/rpmh-rsc.c @@ -498,6 +498,32 @@ static int tcs_ctrl_write(struct rsc_drv *drv, const struct tcs_request *msg) return ret; } +/** + * rpmh_rsc_ctrlr_is_idle: Check if any of the AMCs are busy. + * + * @drv: The controller + * + * Returns false if the TCSes are engaged in handling requests, + * True if controller is idle. + */ +static bool rpmh_rsc_ctrlr_is_idle(struct rsc_drv *drv) +{ + int m; + struct tcs_group *tcs = get_tcs_of_type(drv, ACTIVE_TCS); + bool ret = true; + + spin_lock(&drv->lock); + for (m = tcs->offset; m < tcs->offset + tcs->num_tcs; m++) { + if (!tcs_is_free(drv, m)) { + ret = false; + break; + } + } + spin_unlock(&drv->lock); + + return ret; +} + /** * rpmh_rsc_write_ctrl_data: Write request to the controller * @@ -521,6 +547,53 @@ int rpmh_rsc_write_ctrl_data(struct rsc_drv *drv, const struct tcs_request *msg) return tcs_ctrl_write(drv, msg); } +static int rpmh_domain_power_off(struct generic_pm_domain *rsc_pd) +{ + struct rsc_drv *drv = container_of(rsc_pd, struct rsc_drv, rsc_pd); + + /* + * RPMh domain can not be powered off when there is pending ACK for + * ACTIVE_TCS request. Exit when controller is busy. + */ + + if (!rpmh_rsc_ctrlr_is_idle(drv)) + return -EBUSY; + + return rpmh_flush(&drv->client); +} + +static int rpmh_probe_power_domain(struct platform_device *pdev, + struct rsc_drv *drv) +{ + int ret; + struct generic_pm_domain *rsc_pd = &drv->rsc_pd; + struct device_node *dn = pdev->dev.of_node; + + rsc_pd->name = kasprintf(GFP_KERNEL, "%s", dn->name); + if (!rsc_pd->name) + return -ENOMEM; + + rsc_pd->name = kbasename(rsc_pd->name); + rsc_pd->power_off = rpmh_domain_power_off; + rsc_pd->flags |= GENPD_FLAG_IRQ_SAFE; + + ret = pm_genpd_init(rsc_pd, NULL, false); + if (ret) + goto free_name; + + ret = of_genpd_add_provider_simple(dn, rsc_pd); + if (ret) + goto remove_pd; + + return ret; + +remove_pd: + pm_genpd_remove(rsc_pd); +free_name: + kfree(rsc_pd->name); + return ret; +} + static int rpmh_probe_tcs_config(struct platform_device *pdev, struct rsc_drv *drv) { @@ -650,6 +723,17 @@ static int rpmh_rsc_probe(struct platform_device *pdev) if (ret) return ret; + /* + * Power domain is not required for controllers that support 'solver' + * mode where they can be in autonomous mode executing low power mode + * to power down. + */ + if (of_property_read_bool(dn, "#power-domain-cells")) { + ret = rpmh_probe_power_domain(pdev, drv); + if (ret) + return ret; + } + spin_lock_init(&drv->lock); bitmap_zero(drv->tcs_in_use, MAX_TCS_NR);