From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.9 required=3.0 tests=DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS,T_DKIM_INVALID, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A88EFC46464 for ; Mon, 13 Aug 2018 06:33:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 5187E2084D for ; Mon, 13 Aug 2018 06:33:37 +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="bSAdmO9K"; dkim=fail reason="key not found in DNS" (0-bit key) header.d=codeaurora.org header.i=@codeaurora.org header.b="bSAdmO9K" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 5187E2084D Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728431AbeHMJOX (ORCPT ); Mon, 13 Aug 2018 05:14:23 -0400 Received: from smtp.codeaurora.org ([198.145.29.96]:41594 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726345AbeHMJOX (ORCPT ); Mon, 13 Aug 2018 05:14:23 -0400 Received: by smtp.codeaurora.org (Postfix, from userid 1000) id DE618604BE; Mon, 13 Aug 2018 06:33:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1534142013; bh=no6PNoxgHmUzNMTd5bk7eYp/928N5cWSmtMssJh8nJk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=bSAdmO9K3Kglkl0ZXj04FyIgmOsRbqzwO59CFm3j+D0XmyKpLJXzNn1I9I44OtUZr jXxm1DRry4Sw7c+C1CdH8/52XaanlHlYFwCdUF0b6KR3/KOU5LU52RiO/sNmEhu+HP HHSvpBZxKIdPbP+CBjeKWAVAx3qw9t0tEbxEA0nM= Received: from anischal-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: anischal@smtp.codeaurora.org) by smtp.codeaurora.org (Postfix) with ESMTPSA id 4A15060B1A; Mon, 13 Aug 2018 06:33:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1534142013; bh=no6PNoxgHmUzNMTd5bk7eYp/928N5cWSmtMssJh8nJk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=bSAdmO9K3Kglkl0ZXj04FyIgmOsRbqzwO59CFm3j+D0XmyKpLJXzNn1I9I44OtUZr jXxm1DRry4Sw7c+C1CdH8/52XaanlHlYFwCdUF0b6KR3/KOU5LU52RiO/sNmEhu+HP HHSvpBZxKIdPbP+CBjeKWAVAx3qw9t0tEbxEA0nM= DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 4A15060B1A 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=anischal@codeaurora.org From: Amit Nischal To: Stephen Boyd , Michael Turquette Cc: Andy Gross , David Brown , Rajendra Nayak , Odelu Kukatla , Taniya Das , linux-arm-msm@vger.kernel.org, linux-soc@vger.kernel.org, linux-clk@vger.kernel.org, linux-kernel@vger.kernel.org, Amit Nischal Subject: [PATCH v3 1/4] clk: qcom: gdsc: Add support to enable/disable the clocks with GDSC Date: Mon, 13 Aug 2018 12:03:04 +0530 Message-Id: <1534141987-29601-2-git-send-email-anischal@codeaurora.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1534141987-29601-1-git-send-email-anischal@codeaurora.org> References: <1534141987-29601-1-git-send-email-anischal@codeaurora.org> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org For some of the GDSCs, there is a requirement to enable/disable the few clocks before turning on/off the gdsc power domain. Add support for the same by specifying a list of clk_hw pointers per gdsc and enable/disable them along with power domain on/off callbacks. Signed-off-by: Amit Nischal --- drivers/clk/qcom/gdsc.c | 44 ++++++++++++++++++++++++++++++++++++++++++++ drivers/clk/qcom/gdsc.h | 5 +++++ 2 files changed, 49 insertions(+) diff --git a/drivers/clk/qcom/gdsc.c b/drivers/clk/qcom/gdsc.c index a077133..b6adca1 100644 --- a/drivers/clk/qcom/gdsc.c +++ b/drivers/clk/qcom/gdsc.c @@ -12,6 +12,8 @@ */ #include +#include +#include #include #include #include @@ -208,11 +210,41 @@ static inline void gdsc_assert_reset_aon(struct gdsc *sc) regmap_update_bits(sc->regmap, sc->clamp_io_ctrl, GMEM_RESET_MASK, 0); } + +static int gdsc_clk_prepare_enable(struct gdsc *sc) +{ + int i, ret; + + for (i = 0; i < sc->clk_count; i++) { + ret = clk_prepare_enable(sc->clk_hws[i]->clk); + if (ret) { + for (i--; i >= 0; i--) + clk_disable_unprepare(sc->clk_hws[i]->clk); + return ret; + } + } + return 0; +} + +static void gdsc_clk_disable_unprepare(struct gdsc *sc) +{ + int i; + + for (i = 0; i < sc->clk_count; i++) + clk_disable_unprepare(sc->clk_hws[i]->clk); +} + static int gdsc_enable(struct generic_pm_domain *domain) { struct gdsc *sc = domain_to_gdsc(domain); int ret; + if (sc->clk_count) { + ret = gdsc_clk_prepare_enable(sc); + if (ret) + return ret; + } + if (sc->pwrsts == PWRSTS_ON) return gdsc_deassert_reset(sc); @@ -260,6 +292,9 @@ static int gdsc_enable(struct generic_pm_domain *domain) udelay(1); } + if (sc->clk_count) + gdsc_clk_disable_unprepare(sc); + return 0; } @@ -268,6 +303,12 @@ static int gdsc_disable(struct generic_pm_domain *domain) struct gdsc *sc = domain_to_gdsc(domain); int ret; + if (sc->clk_count) { + ret = gdsc_clk_prepare_enable(sc); + if (ret) + return ret; + } + if (sc->pwrsts == PWRSTS_ON) return gdsc_assert_reset(sc); @@ -299,6 +340,9 @@ static int gdsc_disable(struct generic_pm_domain *domain) if (sc->flags & CLAMP_IO) gdsc_assert_clamp_io(sc); + if (sc->clk_count) + gdsc_clk_disable_unprepare(sc); + return 0; } diff --git a/drivers/clk/qcom/gdsc.h b/drivers/clk/qcom/gdsc.h index bd1f2c7..59957d7 100644 --- a/drivers/clk/qcom/gdsc.h +++ b/drivers/clk/qcom/gdsc.h @@ -17,6 +17,7 @@ #include #include +struct clk_hw; struct regmap; struct reset_controller_dev; @@ -32,6 +33,8 @@ * @resets: ids of resets associated with this gdsc * @reset_count: number of @resets * @rcdev: reset controller + * @clk_count: number of associated clocks + * @clk_hws: clk_hw pointers for associated clocks with gdsc */ struct gdsc { struct generic_pm_domain pd; @@ -60,6 +63,8 @@ struct gdsc { struct reset_controller_dev *rcdev; unsigned int *resets; unsigned int reset_count; + unsigned int clk_count; + struct clk_hw *clk_hws[]; }; struct gdsc_desc { -- QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation