From patchwork Fri Mar 13 13:12:11 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Akash Asthana X-Patchwork-Id: 11436895 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 60BD114B4 for ; Fri, 13 Mar 2020 13:13:28 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 3FE6720724 for ; Fri, 13 Mar 2020 13:13:28 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=mg.codeaurora.org header.i=@mg.codeaurora.org header.b="ThCfPjPE" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726691AbgCMNN1 (ORCPT ); Fri, 13 Mar 2020 09:13:27 -0400 Received: from mail27.static.mailgun.info ([104.130.122.27]:23902 "EHLO mail27.static.mailgun.info" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726692AbgCMNN1 (ORCPT ); Fri, 13 Mar 2020 09:13:27 -0400 DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1584105207; h=References: In-Reply-To: Message-Id: Date: Subject: Cc: To: From: Sender; bh=TMCjXiCd22oaTIvt1nqWA3krN7Avu7WdjmJ3LXbEBQU=; b=ThCfPjPE3BKDmAOkq6mjsOR6pPuwYhSgDV3DtAH8zKwDNJ23r2IPIirgS+C2tnjRMDJmpkob 52cTqBC++yLzG15t6Z+83mFygp8PdC/igo53nMoa89b8cIW5TqngmuXRH2iSceW8S2I2D3Eb J8rJHJriJSYxPmNHwyYj/NEyHY4= X-Mailgun-Sending-Ip: 104.130.122.27 X-Mailgun-Sid: WyI1MzIzYiIsICJsaW51eC1hcm0tbXNtQHZnZXIua2VybmVsLm9yZyIsICJiZTllNGEiXQ== Received: from smtp.codeaurora.org (ec2-35-166-182-171.us-west-2.compute.amazonaws.com [35.166.182.171]) by mxa.mailgun.org with ESMTP id 5e6b86f1.7f1981611c00-smtp-out-n01; Fri, 13 Mar 2020 13:13:21 -0000 (UTC) Received: by smtp.codeaurora.org (Postfix, from userid 1001) id BF9F0C44793; Fri, 13 Mar 2020 13:13:21 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-caf-mail-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.0 required=2.0 tests=ALL_TRUSTED,SPF_NONE autolearn=unavailable autolearn_force=no version=3.4.0 Received: from akashast-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: akashast) by smtp.codeaurora.org (Postfix) with ESMTPSA id D8E6BC44793; Fri, 13 Mar 2020 13:13:14 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org D8E6BC44793 Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; spf=none smtp.mailfrom=akashast@codeaurora.org From: Akash Asthana To: gregkh@linuxfoundation.org, agross@kernel.org, bjorn.andersson@linaro.org, wsa@the-dreams.de, broonie@kernel.org, mark.rutland@arm.com, robh+dt@kernel.org Cc: linux-i2c@vger.kernel.org, linux-spi@vger.kernel.org, devicetree@vger.kernel.org, swboyd@chromium.org, mgautam@codeaurora.org, linux-arm-msm@vger.kernel.org, linux-serial@vger.kernel.org, mka@chromium.org, dianders@chromium.org, evgreen@chromium.org, Akash Asthana Subject: [PATCH V2 5/8] i2c: i2c-qcom-geni: Add interconnect support Date: Fri, 13 Mar 2020 18:42:11 +0530 Message-Id: <1584105134-13583-6-git-send-email-akashast@codeaurora.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1584105134-13583-1-git-send-email-akashast@codeaurora.org> References: <1584105134-13583-1-git-send-email-akashast@codeaurora.org> Sender: linux-arm-msm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Get the interconnect paths for I2C based Serial Engine device and vote according to the bus speed of the driver. Signed-off-by: Akash Asthana --- Changes in V2: - As per Bjorn's comment, removed se == NULL check from geni_i2c_icc_get - As per Bjorn's comment, removed code to set se->icc_path* to NULL in failure - As per Bjorn's comment, introduced and using devm_of_icc_get API for getting path handle - As per Matthias comment, added error handling for icc_set_bw call drivers/i2c/busses/i2c-qcom-geni.c | 110 +++++++++++++++++++++++++++++++++++++ 1 file changed, 110 insertions(+) diff --git a/drivers/i2c/busses/i2c-qcom-geni.c b/drivers/i2c/busses/i2c-qcom-geni.c index 17abf60c..33ab685 100644 --- a/drivers/i2c/busses/i2c-qcom-geni.c +++ b/drivers/i2c/busses/i2c-qcom-geni.c @@ -163,6 +163,23 @@ static void qcom_geni_i2c_conf(struct geni_i2c_dev *gi2c) writel_relaxed(val, gi2c->se.base + SE_I2C_SCL_COUNTERS); } +static int geni_i2c_icc_get(struct geni_se *se) +{ + se->icc_path_geni_to_core = devm_of_icc_get(se->dev, "qup-core"); + if (IS_ERR(se->icc_path_geni_to_core)) + return PTR_ERR(se->icc_path_geni_to_core); + + se->icc_path_cpu_to_geni = devm_of_icc_get(se->dev, "qup-config"); + if (IS_ERR(se->icc_path_cpu_to_geni)) + return PTR_ERR(se->icc_path_cpu_to_geni); + + se->icc_path_geni_to_ddr = devm_of_icc_get(se->dev, "qup-memory"); + if (IS_ERR(se->icc_path_geni_to_ddr)) + return PTR_ERR(se->icc_path_geni_to_ddr); + + return 0; +} + static void geni_i2c_err_misc(struct geni_i2c_dev *gi2c) { u32 m_cmd = readl_relaxed(gi2c->se.base + SE_GENI_M_CMD0); @@ -563,6 +580,39 @@ static int geni_i2c_probe(struct platform_device *pdev) gi2c->adap.dev.of_node = pdev->dev.of_node; strlcpy(gi2c->adap.name, "Geni-I2C", sizeof(gi2c->adap.name)); + ret = geni_i2c_icc_get(&gi2c->se); + if (ret) + return ret; + /* + * Set the bus quota for core and cpu to a reasonable value for + * register access. + * Set quota for DDR based on bus speed, assume peak requirement + * as twice of avg bw. + */ + gi2c->se.avg_bw_core = Bps_to_icc(1000); + gi2c->se.peak_bw_core = Bps_to_icc(CORE_2X_100_MHZ); + gi2c->se.avg_bw_cpu = Bps_to_icc(1000); + gi2c->se.peak_bw_cpu = Bps_to_icc(1000); + gi2c->se.avg_bw_ddr = Bps_to_icc(gi2c->clk_freq_out); + gi2c->se.peak_bw_ddr = Bps_to_icc(2 * gi2c->clk_freq_out); + + /* Vote for core clocks and CPU for register access */ + ret = icc_set_bw(gi2c->se.icc_path_geni_to_core, gi2c->se.avg_bw_core, + gi2c->se.peak_bw_core); + if (ret) { + dev_err(&pdev->dev, "%s: ICC BW voting failed for core\n", + __func__); + return ret; + } + + ret = icc_set_bw(gi2c->se.icc_path_cpu_to_geni, gi2c->se.avg_bw_cpu, + gi2c->se.peak_bw_cpu); + if (ret) { + dev_err(&pdev->dev, "%s: ICC BW voting failed for cpu\n", + __func__); + return ret; + } + ret = geni_se_resources_on(&gi2c->se); if (ret) { dev_err(&pdev->dev, "Error turning on resources %d\n", ret); @@ -584,6 +634,19 @@ static int geni_i2c_probe(struct platform_device *pdev) dev_err(&pdev->dev, "Error turning off resources %d\n", ret); return ret; } + /* Remove vote from core clocks and CPU */ + ret = icc_set_bw(gi2c->se.icc_path_geni_to_core, 0, 0); + if (ret) { + dev_err(&pdev->dev, "%s: ICC BW remove failed for core\n", + __func__); + return ret; + } + + ret = icc_set_bw(gi2c->se.icc_path_cpu_to_geni, 0, 0); + if (ret) { + dev_err(&pdev->dev, "%s: ICC BW remove failed for cpu\n", + __func__); + } dev_dbg(&pdev->dev, "i2c fifo/se-dma mode. fifo depth:%d\n", tx_depth); @@ -629,6 +692,28 @@ static int __maybe_unused geni_i2c_runtime_suspend(struct device *dev) gi2c->suspended = 1; } + /* Remove BW votes */ + ret = icc_set_bw(gi2c->se.icc_path_geni_to_core, 0, 0); + if (ret) { + dev_err_ratelimited(gi2c->se.dev, "%s: ICC BW remove failed for core\n", + __func__); + return ret; + } + + ret = icc_set_bw(gi2c->se.icc_path_cpu_to_geni, 0, 0); + if (ret) { + dev_err_ratelimited(gi2c->se.dev, "%s: ICC BW remove failed for cpu\n", + __func__); + return ret; + } + + ret = icc_set_bw(gi2c->se.icc_path_geni_to_ddr, 0, 0); + if (ret) { + dev_err_ratelimited(gi2c->se.dev, "%s: ICC BW remove failed for ddr\n", + __func__); + return ret; + } + return 0; } @@ -637,6 +722,31 @@ static int __maybe_unused geni_i2c_runtime_resume(struct device *dev) int ret; struct geni_i2c_dev *gi2c = dev_get_drvdata(dev); + /* Vote on Core, CPU and DDR path respectively */ + ret = icc_set_bw(gi2c->se.icc_path_geni_to_core, gi2c->se.avg_bw_core, + gi2c->se.peak_bw_core); + if (ret) { + dev_err_ratelimited(gi2c->se.dev, "%s: ICC BW voting failed for core\n", + __func__); + return ret; + } + + ret = icc_set_bw(gi2c->se.icc_path_cpu_to_geni, gi2c->se.avg_bw_cpu, + gi2c->se.peak_bw_cpu); + if (ret) { + dev_err_ratelimited(gi2c->se.dev, "%s: ICC BW voting failed for cpu\n", + __func__); + return ret; + } + + ret = icc_set_bw(gi2c->se.icc_path_geni_to_ddr, gi2c->se.avg_bw_ddr, + gi2c->se.peak_bw_ddr); + if (ret) { + dev_err_ratelimited(gi2c->se.dev, "%s: ICC BW voting failed for ddr\n", + __func__); + return ret; + } + ret = geni_se_resources_on(&gi2c->se); if (ret) return ret;