From patchwork Sat May 5 09:34:48 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Enric Balletbo i Serra X-Patchwork-Id: 10382071 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 71CFA60467 for ; Sat, 5 May 2018 09:35:32 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 63E7C29446 for ; Sat, 5 May 2018 09:35:32 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 574C42945C; Sat, 5 May 2018 09:35:32 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00, MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id F0E3C29446 for ; Sat, 5 May 2018 09:35:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751789AbeEEJfH (ORCPT ); Sat, 5 May 2018 05:35:07 -0400 Received: from bhuna.collabora.co.uk ([46.235.227.227]:57126 "EHLO bhuna.collabora.co.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751617AbeEEJfF (ORCPT ); Sat, 5 May 2018 05:35:05 -0400 Received: from [127.0.0.1] (localhost [127.0.0.1]) (Authenticated sender: eballetbo) with ESMTPSA id 8553C274329 From: Enric Balletbo i Serra To: myungjoo.ham@samsung.com, kyungmin.park@samsung.com, robh+dt@kernel.org Cc: devicetree@vger.kernel.org, ulf.hansson@linaro.org, heiko@sntech.de, linux-pm@vger.kernel.org, dbasehore@chromium.org, linux-kernel@vger.kernel.org, dianders@google.com, groeck@chromium.org, kernel@collabora.com, hl@rock-chips.com, Chanwoo Choi Subject: [PATCH v3 3/5] devfreq: rk3399_dmc: remove wait for dcf irq event. Date: Sat, 5 May 2018 11:34:48 +0200 Message-Id: <20180505093450.17327-4-enric.balletbo@collabora.com> X-Mailer: git-send-email 2.17.0 In-Reply-To: <20180505093450.17327-1-enric.balletbo@collabora.com> References: <20180505093450.17327-1-enric.balletbo@collabora.com> Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP We have already wait dcf done in ATF, so don't need wait dcf irq in kernel, besides, clear dcf irq in kernel will import competiton between kernel and ATF, only handle dcf irq in ATF is a better way. Signed-off-by: Lin Huang Signed-off-by: Enric Balletbo i Serra Reviewed-by: Chanwoo Choi --- Changes in v3: None Changes in v2: - [3/6] Add Reviewed-by Chanwoo Choi drivers/devfreq/rk3399_dmc.c | 53 +----------------------------------- 1 file changed, 1 insertion(+), 52 deletions(-) diff --git a/drivers/devfreq/rk3399_dmc.c b/drivers/devfreq/rk3399_dmc.c index 5dfbfa3cc878..44a379657cd5 100644 --- a/drivers/devfreq/rk3399_dmc.c +++ b/drivers/devfreq/rk3399_dmc.c @@ -68,15 +68,6 @@ struct rk3399_dmcfreq { struct devfreq_event_dev *edev; struct mutex lock; struct dram_timing timing; - - /* - * DDR Converser of Frequency (DCF) is used to implement DDR frequency - * conversion without the participation of CPU, we will implement and - * control it in arm trust firmware. - */ - wait_queue_head_t wait_dcf_queue; - int irq; - int wait_dcf_flag; struct regulator *vdd_center; unsigned long rate, target_rate; unsigned long volt, target_volt; @@ -117,7 +108,6 @@ static int rk3399_dmcfreq_target(struct device *dev, unsigned long *freq, goto out; } } - dmcfreq->wait_dcf_flag = 1; err = clk_set_rate(dmcfreq->dmc_clk, target_rate); if (err) { @@ -128,14 +118,6 @@ static int rk3399_dmcfreq_target(struct device *dev, unsigned long *freq, goto out; } - /* - * Wait until bcf irq happen, it means freq scaling finish in - * arm trust firmware, use 100ms as timeout time. - */ - if (!wait_event_timeout(dmcfreq->wait_dcf_queue, - !dmcfreq->wait_dcf_flag, HZ / 10)) - dev_warn(dev, "Timeout waiting for dcf interrupt\n"); - /* * Check the dpll rate, * There only two result we will get, @@ -241,22 +223,6 @@ static __maybe_unused int rk3399_dmcfreq_resume(struct device *dev) static SIMPLE_DEV_PM_OPS(rk3399_dmcfreq_pm, rk3399_dmcfreq_suspend, rk3399_dmcfreq_resume); -static irqreturn_t rk3399_dmc_irq(int irq, void *dev_id) -{ - struct rk3399_dmcfreq *dmcfreq = dev_id; - struct arm_smccc_res res; - - dmcfreq->wait_dcf_flag = 0; - wake_up(&dmcfreq->wait_dcf_queue); - - /* Clear the DCF interrupt */ - arm_smccc_smc(ROCKCHIP_SIP_DRAM_FREQ, 0, 0, - ROCKCHIP_SIP_CONFIG_DRAM_CLR_IRQ, - 0, 0, 0, 0, &res); - - return IRQ_HANDLED; -} - static int of_get_ddr_timings(struct dram_timing *timing, struct device_node *np) { @@ -330,16 +296,10 @@ static int rk3399_dmcfreq_probe(struct platform_device *pdev) struct device *dev = &pdev->dev; struct device_node *np = pdev->dev.of_node; struct rk3399_dmcfreq *data; - int ret, irq, index, size; + int ret, index, size; uint32_t *timing; struct dev_pm_opp *opp; - irq = platform_get_irq(pdev, 0); - if (irq < 0) { - dev_err(&pdev->dev, - "Cannot get the dmc interrupt resource: %d\n", irq); - return irq; - } data = devm_kzalloc(dev, sizeof(struct rk3399_dmcfreq), GFP_KERNEL); if (!data) return -ENOMEM; @@ -358,17 +318,6 @@ static int rk3399_dmcfreq_probe(struct platform_device *pdev) return PTR_ERR(data->dmc_clk); }; - data->irq = irq; - ret = devm_request_irq(dev, irq, rk3399_dmc_irq, 0, - dev_name(dev), data); - if (ret) { - dev_err(dev, "Failed to request dmc irq: %d\n", ret); - return ret; - } - - init_waitqueue_head(&data->wait_dcf_queue); - data->wait_dcf_flag = 0; - data->edev = devfreq_event_get_edev_by_phandle(dev, 0); if (IS_ERR(data->edev)) return -EPROBE_DEFER;