From patchwork Wed Oct 26 01:42:26 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Lad, Prabhakar" X-Patchwork-Id: 13020031 X-Patchwork-Delegate: geert@linux-m68k.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id A07ECECDFA1 for ; Wed, 26 Oct 2022 01:42:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232504AbiJZBmm (ORCPT ); Tue, 25 Oct 2022 21:42:42 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46956 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231164AbiJZBml (ORCPT ); Tue, 25 Oct 2022 21:42:41 -0400 Received: from mail-wm1-x336.google.com (mail-wm1-x336.google.com [IPv6:2a00:1450:4864:20::336]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CBE8BDDA22; Tue, 25 Oct 2022 18:42:40 -0700 (PDT) Received: by mail-wm1-x336.google.com with SMTP id l32so9255660wms.2; Tue, 25 Oct 2022 18:42:40 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=hgFR/jqDKTOAbF1Um/uB16BiixkxC3QBZn+DwYf+s1w=; b=h9v5NrHj/e5yrH5asc4huaQY7Mx9s1dD/qbsO+GGK2mA7SdDEOvmOVGFxlPuwuR1Vu EkZaoHuMfNj5W+rejBXzhk/PUa8JD+CHotZXn0fnA6hi5Z/8mBOCd1b/qFV+JM2XVy9l yZT53JW8cFRlzOdN7d7awnMpTrDxLSycbSFTV5X2OwtI1tU9G6dadgRJYexLWlYGxisE mWQujUObtVNNwY0sUeIoCQMwlVqTR0KCVD6zJa4gFdbhOxS46IsNZCAFlz8LliIvUJBp XELzZPTBTNPlVifHlTqQpzYIQEngn3mKFkZhpGzZfymoSldOVNyX9CHDJN5+uBwy/Jyf tAVQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=hgFR/jqDKTOAbF1Um/uB16BiixkxC3QBZn+DwYf+s1w=; b=ByqXO3vvwyXYfPvz7CoYEsJcc+NIuq0FuAwWu054/EUYmm0/NrczEoeveHSnZ/trrZ 3MupIvy+G2QG8zbEFtO4nzjglXixRMFfJeu2KNfdiwvPw/eR2jwjes1Jqm3n9FbtB7U7 ZZuPyNJAm7wY/5eJvrbwFx5aOfm6nnwKIcY1pwUXLQ2VuEV9hInwvSNvWlauDQKl/rqB 9Qgc3dt+ZeFsjBriXnbHfaA0RLcTcCfhRHvi+5mhphs6KhLxkHSrfrZDtJi3qfg0yi5/ my2QGh/5HudVe8kqCvxaSQyMitBZq+UdYQdnPj9DHjplodTMR7qm39oPfIWdgX093yJI NlBQ== X-Gm-Message-State: ACrzQf2e5l5eEIDPrRemGqDM/MotXpov5uW+lGtEDpJyK9jolqhh9Ezi k4daiWk33A7mEgSQ/9+odW8= X-Google-Smtp-Source: AMsMyM6dCOuFp/fWzzJjN6zubI8HboDZ7isKFKYOBASJ/RCRjRUnkgrFbL3ixDvqbBPZkU7T+d9d3Q== X-Received: by 2002:a05:600c:4b2a:b0:3cf:148d:22cb with SMTP id i42-20020a05600c4b2a00b003cf148d22cbmr644677wmp.96.1666748559233; Tue, 25 Oct 2022 18:42:39 -0700 (PDT) Received: from prasmi.home ([2a00:23c8:2501:c701:1d2a:d2a2:361e:a475]) by smtp.gmail.com with ESMTPSA id x12-20020adff0cc000000b00236733f0f98sm3688956wro.107.2022.10.25.18.42.38 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 25 Oct 2022 18:42:38 -0700 (PDT) From: Prabhakar X-Google-Original-From: Prabhakar To: Geert Uytterhoeven , Michael Turquette , Stephen Boyd Cc: linux-renesas-soc@vger.kernel.org, linux-clk@vger.kernel.org, linux-kernel@vger.kernel.org, Prabhakar , Biju Das , Lad Prabhakar Subject: [PATCH v2 1/2] clk: renesas: rzg2l: Don't assume all CPG_MOD clocks support PM Date: Wed, 26 Oct 2022 02:42:26 +0100 Message-Id: <20221026014227.162121-2-prabhakar.mahadev-lad.rj@bp.renesas.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20221026014227.162121-1-prabhakar.mahadev-lad.rj@bp.renesas.com> References: <20221026014227.162121-1-prabhakar.mahadev-lad.rj@bp.renesas.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-renesas-soc@vger.kernel.org From: Lad Prabhakar There are cases where not all CPG_MOD clocks should be assumed to support PM. For example on the CRU block there is a particular sequence that needs to be followed to initialize the CSI-2 D-PHY in which individual clocks need to be turned ON/OFF, due to which Runtime PM support wasn't used by the CRU CSI-2 driver. This patch adds support to allow indicating if PM is not supported by the CPG_MOD clocks. Two new members no_pm_mod_clks and num_no_pm_mod_clks are added to struct rzg2l_cpg_info so that MOD clocks which do not support PM can be passed by no_pm_mod_clks[] array and when the driver uses Runtime PM support the clk ID is matched against the no_pm_mod_clks[] array to see if the clk is needed to be included as part of Runtime PM. Signed-off-by: Lad Prabhakar Reviewed-by: Geert Uytterhoeven --- v1->v2 * Dropped DEF_NO_PM() macro * Added genpd member to struct rzg2l_cpg_priv * Added no_pm_mod_clks and num_no_pm_mod_clks members to struct rzg2l_cpg_info * Updated commit message RFC->v1 * Added no_pm_mod_clks and num_no_pm_mod_clks members as part of struct rzg2l_cpg_priv --- drivers/clk/renesas/rzg2l-cpg.c | 37 ++++++++++++++++++++------------- drivers/clk/renesas/rzg2l-cpg.h | 4 ++++ 2 files changed, 27 insertions(+), 14 deletions(-) diff --git a/drivers/clk/renesas/rzg2l-cpg.c b/drivers/clk/renesas/rzg2l-cpg.c index dfd676310ce9..66b909f31c77 100644 --- a/drivers/clk/renesas/rzg2l-cpg.c +++ b/drivers/clk/renesas/rzg2l-cpg.c @@ -95,6 +95,7 @@ struct rzg2l_pll5_mux_dsi_div_param { * @num_resets: Number of Module Resets in info->resets[] * @last_dt_core_clk: ID of the last Core Clock exported to DT * @info: Pointer to platform data + * @genpd: PM domain * @mux_dsi_div_params: pll5 mux and dsi div parameters */ struct rzg2l_cpg_priv { @@ -111,6 +112,8 @@ struct rzg2l_cpg_priv { const struct rzg2l_cpg_info *info; + struct generic_pm_domain genpd; + struct rzg2l_pll5_mux_dsi_div_param mux_dsi_div_params; }; @@ -1223,22 +1226,31 @@ static int rzg2l_cpg_reset_controller_register(struct rzg2l_cpg_priv *priv) return devm_reset_controller_register(priv->dev, &priv->rcdev); } -static bool rzg2l_cpg_is_pm_clk(const struct of_phandle_args *clkspec) +static bool rzg2l_cpg_is_pm_clk(struct rzg2l_cpg_priv *priv, + const struct of_phandle_args *clkspec) { + const struct rzg2l_cpg_info *info = priv->info; + unsigned int id; + unsigned int i; + if (clkspec->args_count != 2) return false; - switch (clkspec->args[0]) { - case CPG_MOD: - return true; - - default: + if (clkspec->args[0] != CPG_MOD) return false; + + id = clkspec->args[1] + info->num_total_core_clks; + for (i = 0; i < info->num_no_pm_mod_clks; i++) { + if (info->no_pm_mod_clks[i] == id) + return false; } + + return true; } static int rzg2l_cpg_attach_dev(struct generic_pm_domain *unused, struct device *dev) { + struct rzg2l_cpg_priv *priv = container_of(unused, struct rzg2l_cpg_priv, genpd); struct device_node *np = dev->of_node; struct of_phandle_args clkspec; bool once = true; @@ -1248,7 +1260,7 @@ static int rzg2l_cpg_attach_dev(struct generic_pm_domain *unused, struct device while (!of_parse_phandle_with_args(np, "clocks", "#clock-cells", i, &clkspec)) { - if (rzg2l_cpg_is_pm_clk(&clkspec)) { + if (rzg2l_cpg_is_pm_clk(priv, &clkspec)) { if (once) { once = false; error = pm_clk_create(dev); @@ -1298,16 +1310,13 @@ static void rzg2l_cpg_genpd_remove(void *data) pm_genpd_remove(data); } -static int __init rzg2l_cpg_add_clk_domain(struct device *dev) +static int __init rzg2l_cpg_add_clk_domain(struct rzg2l_cpg_priv *priv) { + struct device *dev = priv->dev; struct device_node *np = dev->of_node; - struct generic_pm_domain *genpd; + struct generic_pm_domain *genpd = &priv->genpd; int ret; - genpd = devm_kzalloc(dev, sizeof(*genpd), GFP_KERNEL); - if (!genpd) - return -ENOMEM; - genpd->name = np->name; genpd->flags = GENPD_FLAG_PM_CLK | GENPD_FLAG_ALWAYS_ON | GENPD_FLAG_ACTIVE_WAKEUP; @@ -1377,7 +1386,7 @@ static int __init rzg2l_cpg_probe(struct platform_device *pdev) if (error) return error; - error = rzg2l_cpg_add_clk_domain(dev); + error = rzg2l_cpg_add_clk_domain(priv); if (error) return error; diff --git a/drivers/clk/renesas/rzg2l-cpg.h b/drivers/clk/renesas/rzg2l-cpg.h index cecbdf5e4f93..eee780276a9e 100644 --- a/drivers/clk/renesas/rzg2l-cpg.h +++ b/drivers/clk/renesas/rzg2l-cpg.h @@ -256,6 +256,10 @@ struct rzg2l_cpg_info { unsigned int num_mod_clks; unsigned int num_hw_mod_clks; + /* No PM Module Clocks */ + const unsigned int *no_pm_mod_clks; + unsigned int num_no_pm_mod_clks; + /* Resets */ const struct rzg2l_reset *resets; unsigned int num_resets;