From patchwork Wed Oct 14 15:58:24 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Douglas Anderson X-Patchwork-Id: 11837999 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 CAC211130 for ; Wed, 14 Oct 2020 15:58:48 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9FD362223F for ; Wed, 14 Oct 2020 15:58:48 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b="Dblwm5sL" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729983AbgJNP6r (ORCPT ); Wed, 14 Oct 2020 11:58:47 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45292 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729116AbgJNP6r (ORCPT ); Wed, 14 Oct 2020 11:58:47 -0400 Received: from mail-pf1-x444.google.com (mail-pf1-x444.google.com [IPv6:2607:f8b0:4864:20::444]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3B3BBC0613D2 for ; Wed, 14 Oct 2020 08:58:47 -0700 (PDT) Received: by mail-pf1-x444.google.com with SMTP id y14so24280pfp.13 for ; Wed, 14 Oct 2020 08:58:47 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=MKPVqt9nZ28XkBuHkl7IfJCFNBXzL2D6MJ4L8d/0r2o=; b=Dblwm5sLURfAjRk5ukv6aLUllKii/VCuBuaa147EWeGPGCmv4wLW08wD4ummGjXFp4 TpXPGzb+RaxFW3U5ZnoaRz9ZOr8CiQ+wf6/IO74QDgYQPqTnCFfopSmpFlds4Ab9hzPI Xbqsc+WVtgwGdZG7T0iIGsssoNAncFBuz/5sA= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=MKPVqt9nZ28XkBuHkl7IfJCFNBXzL2D6MJ4L8d/0r2o=; b=VL9j/DUz1BRwWDQvzc501+XsEbSut1Vp4blhy/1AMxDueGmcqHMainwV9B6WWRY1sG MDzZmjYxr1Qhb0nd3hUJqhNCmuO4/gD951e0Cvp4iy599w9U8Fcj/mRNYqc1ftXXDHj2 M4A1qpx2xVDTw1F4hzFqFvNak3Dj8IPOSl+/jw5tdrDGCOLFlthQ8iXzzFDVUEXjT5Jx YSY5b9Y06rSdHb3d4jeer2vzYkN09Xts2cE3Vxws02tQSHc/cK7ccsQ6UtfXNCd0e5st yRkd+plsKDlJSH4ZNqzq5X+2Vn3ytrQ17dzQyPKYa/ycEwXR4n2kQ+lK+P6A7A9XfGUM o7pA== X-Gm-Message-State: AOAM532qjbbId88bIAt/QUWrpVkvfrrssOoMpjzUJ0IU3Acdyy7HxPp8 M0DjrqUVl6qQCm6/jp0ClqbQ7A== X-Google-Smtp-Source: ABdhPJy8UzEFh/715lGO+bb/nVA3OaPMlDG3AT9U0V3cqUwJicweiz5qB4RiWSAkQTF/jwsY81Aq4A== X-Received: by 2002:aa7:9af1:0:b029:152:6101:ad17 with SMTP id y17-20020aa79af10000b02901526101ad17mr2228pfp.25.1602691126765; Wed, 14 Oct 2020 08:58:46 -0700 (PDT) Received: from tictac2.mtv.corp.google.com ([2620:15c:202:1:42b0:34ff:fe3d:58e6]) by smtp.gmail.com with ESMTPSA id h2sm80251pjv.4.2020.10.14.08.58.45 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 14 Oct 2020 08:58:46 -0700 (PDT) From: Douglas Anderson To: Stephen Boyd Cc: David Brown , Rajendra Nayak , linux-soc@vger.kernel.org, Taniya Das , Douglas Anderson , Andy Gross , Bjorn Andersson , Michael Turquette , linux-arm-msm@vger.kernel.org, linux-clk@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v2] clk: qcom: lpasscc: Re-configure the PLL in case lost Date: Wed, 14 Oct 2020 08:58:24 -0700 Message-Id: <20201014085758.v2.1.Id0cc5d859e2422082a29a7909658932c857f5a81@changeid> X-Mailer: git-send-email 2.28.0.1011.ga647a8990f-goog MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org From: Taniya Das In the case where the PLL configuration is lost, then the pm runtime resume will reconfigure before usage. Fixes: edab812d802d ("clk: qcom: lpass: Add support for LPASS clock controller for SC7180") Signed-off-by: Taniya Das Signed-off-by: Douglas Anderson --- I took the liberty of fixing my own nits that I had with Taniya's patch, AKA: https://lore.kernel.org/r/1602614008-2421-2-git-send-email-tdas@codeaurora.org Changes in v2: - Don't needlessly have a 2nd copy of dev_pm_ops and jam it in. - Check the return value of pm_clk_resume() - l_val should be unsigned int. drivers/clk/qcom/lpasscorecc-sc7180.c | 23 ++++++++++++++++++++++- 1 file changed, 22 insertions(+), 1 deletion(-) diff --git a/drivers/clk/qcom/lpasscorecc-sc7180.c b/drivers/clk/qcom/lpasscorecc-sc7180.c index 228d08f5d26f..ee23eb5b9bf2 100644 --- a/drivers/clk/qcom/lpasscorecc-sc7180.c +++ b/drivers/clk/qcom/lpasscorecc-sc7180.c @@ -356,6 +356,25 @@ static const struct qcom_cc_desc lpass_audio_hm_sc7180_desc = { .num_gdscs = ARRAY_SIZE(lpass_audio_hm_sc7180_gdscs), }; +static int lpass_core_cc_pm_clk_resume(struct device *dev) +{ + struct regmap *regmap = dev_get_drvdata(dev); + unsigned int l_val; + int ret; + + ret = pm_clk_resume(dev); + if (ret) + return ret; + + /* Read PLL_L_VAL */ + regmap_read(regmap, 0x1004, &l_val); + if (!l_val) + clk_fabia_pll_configure(&lpass_lpaaudio_dig_pll, regmap, + &lpass_lpaaudio_dig_pll_config); + + return 0; +} + static int lpass_core_cc_sc7180_probe(struct platform_device *pdev) { const struct qcom_cc_desc *desc; @@ -373,6 +392,8 @@ static int lpass_core_cc_sc7180_probe(struct platform_device *pdev) if (IS_ERR(regmap)) return PTR_ERR(regmap); + dev_set_drvdata(&pdev->dev, regmap); + /* * Keep the CLK always-ON * LPASS_AUDIO_CORE_SYSNOC_SWAY_CORE_CLK @@ -449,7 +470,7 @@ static int lpass_core_sc7180_probe(struct platform_device *pdev) } static const struct dev_pm_ops lpass_core_cc_pm_ops = { - SET_RUNTIME_PM_OPS(pm_clk_suspend, pm_clk_resume, NULL) + SET_RUNTIME_PM_OPS(pm_clk_suspend, lpass_core_cc_pm_clk_resume, NULL) }; static struct platform_driver lpass_core_cc_sc7180_driver = {