From patchwork Wed Mar 20 09:49:08 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Rajendra Nayak X-Patchwork-Id: 10861213 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 0990017E0 for ; Wed, 20 Mar 2019 09:50:55 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id ECF5D29A3B for ; Wed, 20 Mar 2019 09:50:54 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id E192629A9D; Wed, 20 Mar 2019 09:50:54 +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=-7.7 required=2.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI 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 8CACC29A3B for ; Wed, 20 Mar 2019 09:50:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727504AbfCTJtl (ORCPT ); Wed, 20 Mar 2019 05:49:41 -0400 Received: from smtp.codeaurora.org ([198.145.29.96]:50192 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725996AbfCTJtl (ORCPT ); Wed, 20 Mar 2019 05:49:41 -0400 Received: by smtp.codeaurora.org (Postfix, from userid 1000) id EDA7A60E7A; Wed, 20 Mar 2019 09:49:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1553075379; bh=OJALzsWlECZ4X10Xb4pxyAdKOLu5a0A06V+PzDVAsIc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Jr5w5w74hexB0gSDO9U3LTDJAjSXPHAMo47jw/l/nKf4QUkkI0dzoluwpt9/gPdsi 8FGpFx8EEK23esGk4vvYBzgyi1X1teVZX7moXHRvssXyNlsrM+X1wENEENz+w/gTdZ gKmt2E0WXGg4DX0qg48xThAEOa6ejQnQ8hBx7I8g= 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 691C06072E; Wed, 20 Mar 2019 09:49:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1553075379; bh=OJALzsWlECZ4X10Xb4pxyAdKOLu5a0A06V+PzDVAsIc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Jr5w5w74hexB0gSDO9U3LTDJAjSXPHAMo47jw/l/nKf4QUkkI0dzoluwpt9/gPdsi 8FGpFx8EEK23esGk4vvYBzgyi1X1teVZX7moXHRvssXyNlsrM+X1wENEENz+w/gTdZ gKmt2E0WXGg4DX0qg48xThAEOa6ejQnQ8hBx7I8g= DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 691C06072E 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: linux-kernel@vger.kernel.org Cc: linux-arm-msm@vger.kernel.org, linux-pm@vger.kernel.org, linux-serial@vger.kernel.org, linux-spi@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-scsi@vger.kernel.org, swboyd@chromium.org, ulf.hansson@linaro.org, viresh.kumar@linaro.org, dianders@chromium.org, rafael@kernel.org, Rajendra Nayak Subject: [RFC v2 01/11] OPP: Don't overwrite rounded clk rate Date: Wed, 20 Mar 2019 15:19:08 +0530 Message-Id: <20190320094918.20234-2-rnayak@codeaurora.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190320094918.20234-1-rnayak@codeaurora.org> References: <20190320094918.20234-1-rnayak@codeaurora.org> MIME-Version: 1.0 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 From: Stephen Boyd Doing this allows us to call this API with any rate requested and have it not need to match in the OPP table. Instead, we'll round the rate up to the nearest OPP that we see so that we can get the voltage or level that's required for that OPP. This supports users of OPP that want to specify the 'fmax' tables of a device instead of every single frequency that they need. And for devices that required the exact frequency, we can rely on the clk framework to round the rate to the nearest supported frequency instead of the OPP framework to do so. Note that this may affect drivers that don't want the clk framework to do rounding, but instead want the OPP table to do the rounding for them. Do we have that case? Should we add some flag to the OPP table to indicate this and then not have that flag set when there isn't an OPP table for the device and also introduce a property like 'opp-use-clk' to tell the table that it should use the clk APIs to round rates instead of OPP? Signed-off-by: Stephen Boyd Signed-off-by: Rajendra Nayak --- drivers/opp/core.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/drivers/opp/core.c b/drivers/opp/core.c index 0420f7e8ad5b..bc9a7762dd4c 100644 --- a/drivers/opp/core.c +++ b/drivers/opp/core.c @@ -703,7 +703,7 @@ static int _set_required_opps(struct device *dev, int dev_pm_opp_set_rate(struct device *dev, unsigned long target_freq) { struct opp_table *opp_table; - unsigned long freq, old_freq; + unsigned long freq, opp_freq, old_freq, old_opp_freq; struct dev_pm_opp *old_opp, *opp; struct clk *clk; int ret; @@ -742,13 +742,15 @@ int dev_pm_opp_set_rate(struct device *dev, unsigned long target_freq) goto put_opp_table; } - old_opp = _find_freq_ceil(opp_table, &old_freq); + old_opp_freq = old_freq; + old_opp = _find_freq_ceil(opp_table, &old_opp_freq); if (IS_ERR(old_opp)) { dev_err(dev, "%s: failed to find current OPP for freq %lu (%ld)\n", __func__, old_freq, PTR_ERR(old_opp)); } - opp = _find_freq_ceil(opp_table, &freq); + opp_freq = freq; + opp = _find_freq_ceil(opp_table, &opp_freq); if (IS_ERR(opp)) { ret = PTR_ERR(opp); dev_err(dev, "%s: failed to find OPP for freq %lu (%d)\n",