From patchwork Thu Feb 23 04:19:38 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Sam Protsenko X-Patchwork-Id: 656376 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 AAC49C64ED6 for ; Thu, 23 Feb 2023 04:19:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233004AbjBWETo (ORCPT ); Wed, 22 Feb 2023 23:19:44 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35158 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233149AbjBWETd (ORCPT ); Wed, 22 Feb 2023 23:19:33 -0500 Received: from mail-oo1-xc33.google.com (mail-oo1-xc33.google.com [IPv6:2607:f8b0:4864:20::c33]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 80D841E9F7 for ; Wed, 22 Feb 2023 20:19:29 -0800 (PST) Received: by mail-oo1-xc33.google.com with SMTP id n27-20020a4ad63b000000b005252709efdbso18860oon.4 for ; Wed, 22 Feb 2023 20:19:29 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; 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=D4kLdNBDLHRncbUrO25+rnplxMkXOdoihdQ6ujkI2/Q=; b=EHqp7TR69VBewrbXlwhhy0jCr3Lh752CiYhXiqFjhQOsnXwp6uk17w6AShTqPZC1Ha jd10QuZUxNViNtxOhKhEFbVyS+z9PScqHH25pcK9BUAc1qMKUJdPj2CI0rTrDN+z816U oDq1s9yRwqO63ql6ry6OEBJ4rLwQ74rPANYzFlIVbXx0t8bz0neMf3wJj6B1CdpbdfH/ CNj98HSogheOD0Ar4fakxIw3qkEYnkejJJj//THIGqklnxbNXfQ2zs33x5tjo1pZT/e3 GyKIrb0z8YRctdq6E2J+DcKqDgp6zVizp7c23PYB+hNoPp46+j9ZM7ys/+YGJEM4wxCC 0OtA== 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=D4kLdNBDLHRncbUrO25+rnplxMkXOdoihdQ6ujkI2/Q=; b=ENZK75gRz74S9luugeLo9XXXeUy64wTDZtSifmZKYJbnSHPF4iH5euCAD+rtFfLlhf fADvONS75AUbyDdcuc5A0kCzswvfb/XCE6vMmwlVhf+hD/Vt8YSWVti6LbuKTSqr35Ri 7xovIHvju6QDppmgC7HOHp7vrpXVrTqmd8YbqmbPC1Tuh1MonD3IAKMTUVlpLYt1Iq3A tJylRB2eimPPneUXc/HnEWwA/KuU7GiYJR3O4AFUEFkqTOPoVlSdKVyqZ7OdIT2GBjyL BOGOpnidOjeKojOM1bVfS5Th1+cCweDQ715l7rqXHhtbaLxSXZtL1XrqgABpFsqB3UOr Wxag== X-Gm-Message-State: AO0yUKXeTPnEMPuBwLpHtCQ92iEHW6Ci8S1h6P/AvIG8ChqbqyEqug5r QTTtlA0BNKoS8zRxjdU8XFWslw== X-Google-Smtp-Source: AK7set+CbfttmHkz8Iym7B1fFvolJqM1FBYUdDBA6mLqfEUaqJXVXeeYUgxiopIUwMOo99FIh8O7tg== X-Received: by 2002:a4a:d638:0:b0:51a:6ea9:5053 with SMTP id n24-20020a4ad638000000b0051a6ea95053mr4688535oon.9.1677125969142; Wed, 22 Feb 2023 20:19:29 -0800 (PST) Received: from localhost ([136.49.140.41]) by smtp.gmail.com with ESMTPSA id m16-20020a056820035000b00517fc5fdf5bsm2271571ooe.17.2023.02.22.20.19.28 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 22 Feb 2023 20:19:28 -0800 (PST) From: Sam Protsenko To: Marek Szyprowski , Krzysztof Kozlowski , Sylwester Nawrocki , Chanwoo Choi Cc: Tomasz Figa , Alim Akhtar , Chanho Park , David Virag , Sumit Semwal , Michael Turquette , Stephen Boyd , linux-samsung-soc@vger.kernel.org, linux-clk@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH v3 6/6] clk: samsung: exynos5433: Extract PM support to common ARM64 layer Date: Wed, 22 Feb 2023 22:19:38 -0600 Message-Id: <20230223041938.22732-7-semen.protsenko@linaro.org> X-Mailer: git-send-email 2.39.1 In-Reply-To: <20230223041938.22732-1-semen.protsenko@linaro.org> References: <20230223041938.22732-1-semen.protsenko@linaro.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-samsung-soc@vger.kernel.org Exynos5433 clock driver implements PM support internally, which might be also useful for other Exynos clock drivers. Extract all PM related code from clk-exynos5433 to common ARM64 functions. Acked-by: Marek Szyprowski Tested-by: Marek Szyprowski Signed-off-by: Sam Protsenko --- Changes in v3: - Rebased on top of latest soc/for-next tree - Added Marek's Acked-by tag - Added Marek's authorship in the header comment Changes in v2: - Rebased on top of latest soc/for-next tree - Included linux/slab.h for kfree (found by kernel test robot) drivers/clk/samsung/clk-exynos-arm64.c | 173 ++++++++++++++++++++++++- drivers/clk/samsung/clk-exynos-arm64.h | 3 + drivers/clk/samsung/clk-exynos5433.c | 157 +--------------------- 3 files changed, 177 insertions(+), 156 deletions(-) diff --git a/drivers/clk/samsung/clk-exynos-arm64.c b/drivers/clk/samsung/clk-exynos-arm64.c index 2aa3f0a5644e..2092e1c11278 100644 --- a/drivers/clk/samsung/clk-exynos-arm64.c +++ b/drivers/clk/samsung/clk-exynos-arm64.c @@ -1,7 +1,9 @@ // SPDX-License-Identifier: GPL-2.0-only /* + * Copyright (C) 2017 Samsung Electronics Co., Ltd. * Copyright (C) 2021 Linaro Ltd. * Copyright (C) 2021 Dávid Virág + * Author: Marek Szyprowski * Author: Sam Protsenko * Author: Dávid Virág * @@ -10,6 +12,9 @@ */ #include #include +#include +#include +#include #include "clk-exynos-arm64.h" @@ -21,6 +26,19 @@ #define GATE_OFF_START 0x2000 #define GATE_OFF_END 0x2fff +struct exynos_arm64_cmu_data { + struct samsung_clk_reg_dump *clk_save; + unsigned int nr_clk_save; + const struct samsung_clk_reg_dump *clk_suspend; + unsigned int nr_clk_suspend; + + struct clk *clk; + struct clk **pclks; + int nr_pclks; + + struct samsung_clk_provider *ctx; +}; + /** * exynos_arm64_init_clocks - Set clocks initial configuration * @np: CMU device tree node with "reg" property (CMU addr) @@ -76,10 +94,16 @@ static int __init exynos_arm64_enable_bus_clk(struct device *dev, if (!cmu->clk_name) return 0; - if (dev) + if (dev) { + struct exynos_arm64_cmu_data *data; + parent_clk = clk_get(dev, cmu->clk_name); - else + data = dev_get_drvdata(dev); + if (data) + data->clk = parent_clk; + } else { parent_clk = of_clk_get_by_name(np, cmu->clk_name); + } if (IS_ERR(parent_clk)) return PTR_ERR(parent_clk); @@ -87,6 +111,46 @@ static int __init exynos_arm64_enable_bus_clk(struct device *dev, return clk_prepare_enable(parent_clk); } +static int __init exynos_arm64_cmu_prepare_pm(struct device *dev, + const struct samsung_cmu_info *cmu) +{ + struct exynos_arm64_cmu_data *data = dev_get_drvdata(dev); + int i; + + data->clk_save = samsung_clk_alloc_reg_dump(cmu->clk_regs, + cmu->nr_clk_regs); + if (!data->clk_save) + return -ENOMEM; + + data->nr_clk_save = cmu->nr_clk_regs; + data->clk_suspend = cmu->suspend_regs; + data->nr_clk_suspend = cmu->nr_suspend_regs; + data->nr_pclks = of_clk_get_parent_count(dev->of_node); + if (!data->nr_pclks) + return 0; + + data->pclks = devm_kcalloc(dev, sizeof(struct clk *), data->nr_pclks, + GFP_KERNEL); + if (!data->pclks) { + kfree(data->clk_save); + return -ENOMEM; + } + + for (i = 0; i < data->nr_pclks; i++) { + struct clk *clk = of_clk_get(dev->of_node, i); + + if (IS_ERR(clk)) { + kfree(data->clk_save); + while (--i >= 0) + clk_put(data->pclks[i]); + return PTR_ERR(clk); + } + data->pclks[i] = clk; + } + + return 0; +} + /** * exynos_arm64_register_cmu - Register specified Exynos CMU domain * @dev: Device object; may be NULL if this function is not being @@ -111,3 +175,108 @@ void __init exynos_arm64_register_cmu(struct device *dev, exynos_arm64_init_clocks(np, cmu->clk_regs, cmu->nr_clk_regs); samsung_cmu_register_one(np, cmu); } + +/** + * exynos_arm64_register_cmu_pm - Register Exynos CMU domain with PM support + * + * @pdev: Platform device object + * @set_manual: If true, set gate clocks to manual mode + * + * It's a version of exynos_arm64_register_cmu() with PM support. Should be + * called from probe function of platform driver. + * + * Return: 0 on success, or negative error code on error. + */ +int __init exynos_arm64_register_cmu_pm(struct platform_device *pdev, + bool set_manual) +{ + const struct samsung_cmu_info *cmu; + struct device *dev = &pdev->dev; + struct device_node *np = dev->of_node; + struct exynos_arm64_cmu_data *data; + void __iomem *reg_base; + int ret; + + cmu = of_device_get_match_data(dev); + + data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); + if (!data) + return -ENOMEM; + + platform_set_drvdata(pdev, data); + + ret = exynos_arm64_cmu_prepare_pm(dev, cmu); + if (ret) + return ret; + + ret = exynos_arm64_enable_bus_clk(dev, NULL, cmu); + if (ret) + return ret; + + if (set_manual) + exynos_arm64_init_clocks(np, cmu->clk_regs, cmu->nr_clk_regs); + + reg_base = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(reg_base)) + return PTR_ERR(reg_base); + + data->ctx = samsung_clk_init(dev, reg_base, cmu->nr_clk_ids); + + /* + * Enable runtime PM here to allow the clock core using runtime PM + * for the registered clocks. Additionally, we increase the runtime + * PM usage count before registering the clocks, to prevent the + * clock core from runtime suspending the device. + */ + pm_runtime_get_noresume(dev); + pm_runtime_set_active(dev); + pm_runtime_enable(dev); + + samsung_cmu_register_clocks(data->ctx, cmu); + samsung_clk_of_add_provider(dev->of_node, data->ctx); + pm_runtime_put_sync(dev); + + return 0; +} + +int exynos_arm64_cmu_suspend(struct device *dev) +{ + struct exynos_arm64_cmu_data *data = dev_get_drvdata(dev); + int i; + + samsung_clk_save(data->ctx->reg_base, data->clk_save, + data->nr_clk_save); + + for (i = 0; i < data->nr_pclks; i++) + clk_prepare_enable(data->pclks[i]); + + /* For suspend some registers have to be set to certain values */ + samsung_clk_restore(data->ctx->reg_base, data->clk_suspend, + data->nr_clk_suspend); + + for (i = 0; i < data->nr_pclks; i++) + clk_disable_unprepare(data->pclks[i]); + + clk_disable_unprepare(data->clk); + + return 0; +} + +int exynos_arm64_cmu_resume(struct device *dev) +{ + struct exynos_arm64_cmu_data *data = dev_get_drvdata(dev); + int i; + + clk_prepare_enable(data->clk); + + for (i = 0; i < data->nr_pclks; i++) + clk_prepare_enable(data->pclks[i]); + + samsung_clk_restore(data->ctx->reg_base, data->clk_save, + data->nr_clk_save); + + for (i = 0; i < data->nr_pclks; i++) + clk_disable_unprepare(data->pclks[i]); + + return 0; +} diff --git a/drivers/clk/samsung/clk-exynos-arm64.h b/drivers/clk/samsung/clk-exynos-arm64.h index 0dd174693935..969979e714bc 100644 --- a/drivers/clk/samsung/clk-exynos-arm64.h +++ b/drivers/clk/samsung/clk-exynos-arm64.h @@ -16,5 +16,8 @@ void exynos_arm64_register_cmu(struct device *dev, struct device_node *np, const struct samsung_cmu_info *cmu); +int exynos_arm64_register_cmu_pm(struct platform_device *pdev, bool set_manual); +int exynos_arm64_cmu_suspend(struct device *dev); +int exynos_arm64_cmu_resume(struct device *dev); #endif /* __CLK_EXYNOS_ARM64_H */ diff --git a/drivers/clk/samsung/clk-exynos5433.c b/drivers/clk/samsung/clk-exynos5433.c index eb72bf2aaee8..ed43233649ae 100644 --- a/drivers/clk/samsung/clk-exynos5433.c +++ b/drivers/clk/samsung/clk-exynos5433.c @@ -10,7 +10,6 @@ #include #include #include -#include #include #include #include @@ -19,6 +18,7 @@ #include "clk.h" #include "clk-cpu.h" +#include "clk-exynos-arm64.h" #include "clk-pll.h" /* @@ -5478,160 +5478,9 @@ static const struct samsung_cmu_info imem_cmu_info __initconst = { .clk_name = "aclk_imem_200", }; -struct exynos5433_cmu_data { - struct samsung_clk_reg_dump *clk_save; - unsigned int nr_clk_save; - const struct samsung_clk_reg_dump *clk_suspend; - unsigned int nr_clk_suspend; - - struct clk *clk; - struct clk **pclks; - int nr_pclks; - - /* must be the last entry */ - struct samsung_clk_provider ctx; -}; - -static int __maybe_unused exynos5433_cmu_suspend(struct device *dev) -{ - struct exynos5433_cmu_data *data = dev_get_drvdata(dev); - int i; - - samsung_clk_save(data->ctx.reg_base, data->clk_save, - data->nr_clk_save); - - for (i = 0; i < data->nr_pclks; i++) - clk_prepare_enable(data->pclks[i]); - - /* for suspend some registers have to be set to certain values */ - samsung_clk_restore(data->ctx.reg_base, data->clk_suspend, - data->nr_clk_suspend); - - for (i = 0; i < data->nr_pclks; i++) - clk_disable_unprepare(data->pclks[i]); - - clk_disable_unprepare(data->clk); - - return 0; -} - -static int __maybe_unused exynos5433_cmu_resume(struct device *dev) -{ - struct exynos5433_cmu_data *data = dev_get_drvdata(dev); - int i; - - clk_prepare_enable(data->clk); - - for (i = 0; i < data->nr_pclks; i++) - clk_prepare_enable(data->pclks[i]); - - samsung_clk_restore(data->ctx.reg_base, data->clk_save, - data->nr_clk_save); - - for (i = 0; i < data->nr_pclks; i++) - clk_disable_unprepare(data->pclks[i]); - - return 0; -} - static int __init exynos5433_cmu_probe(struct platform_device *pdev) { - const struct samsung_cmu_info *info; - struct exynos5433_cmu_data *data; - struct samsung_clk_provider *ctx; - struct device *dev = &pdev->dev; - void __iomem *reg_base; - int i; - - info = of_device_get_match_data(dev); - - data = devm_kzalloc(dev, - struct_size(data, ctx.clk_data.hws, info->nr_clk_ids), - GFP_KERNEL); - if (!data) - return -ENOMEM; - ctx = &data->ctx; - - reg_base = devm_platform_ioremap_resource(pdev, 0); - if (IS_ERR(reg_base)) - return PTR_ERR(reg_base); - - for (i = 0; i < info->nr_clk_ids; ++i) - ctx->clk_data.hws[i] = ERR_PTR(-ENOENT); - - ctx->clk_data.num = info->nr_clk_ids; - ctx->reg_base = reg_base; - ctx->dev = dev; - spin_lock_init(&ctx->lock); - - data->clk_save = samsung_clk_alloc_reg_dump(info->clk_regs, - info->nr_clk_regs); - if (!data->clk_save) - return -ENOMEM; - data->nr_clk_save = info->nr_clk_regs; - data->clk_suspend = info->suspend_regs; - data->nr_clk_suspend = info->nr_suspend_regs; - data->nr_pclks = of_clk_get_parent_count(dev->of_node); - - if (data->nr_pclks > 0) { - data->pclks = devm_kcalloc(dev, sizeof(struct clk *), - data->nr_pclks, GFP_KERNEL); - if (!data->pclks) { - kfree(data->clk_save); - return -ENOMEM; - } - for (i = 0; i < data->nr_pclks; i++) { - struct clk *clk = of_clk_get(dev->of_node, i); - - if (IS_ERR(clk)) { - kfree(data->clk_save); - while (--i >= 0) - clk_put(data->pclks[i]); - return PTR_ERR(clk); - } - data->pclks[i] = clk; - } - } - - if (info->clk_name) - data->clk = clk_get(dev, info->clk_name); - clk_prepare_enable(data->clk); - - platform_set_drvdata(pdev, data); - - /* - * Enable runtime PM here to allow the clock core using runtime PM - * for the registered clocks. Additionally, we increase the runtime - * PM usage count before registering the clocks, to prevent the - * clock core from runtime suspending the device. - */ - pm_runtime_get_noresume(dev); - pm_runtime_set_active(dev); - pm_runtime_enable(dev); - - if (info->pll_clks) - samsung_clk_register_pll(ctx, info->pll_clks, - info->nr_pll_clks); - if (info->mux_clks) - samsung_clk_register_mux(ctx, info->mux_clks, - info->nr_mux_clks); - if (info->div_clks) - samsung_clk_register_div(ctx, info->div_clks, - info->nr_div_clks); - if (info->gate_clks) - samsung_clk_register_gate(ctx, info->gate_clks, - info->nr_gate_clks); - if (info->fixed_clks) - samsung_clk_register_fixed_rate(ctx, info->fixed_clks, - info->nr_fixed_clks); - if (info->fixed_factor_clks) - samsung_clk_register_fixed_factor(ctx, info->fixed_factor_clks, - info->nr_fixed_factor_clks); - - samsung_clk_of_add_provider(dev->of_node, ctx); - pm_runtime_put_sync(dev); - - return 0; + return exynos_arm64_register_cmu_pm(pdev, false); } static const struct of_device_id exynos5433_cmu_of_match[] = { @@ -5679,7 +5528,7 @@ static const struct of_device_id exynos5433_cmu_of_match[] = { }; static const struct dev_pm_ops exynos5433_cmu_pm_ops = { - SET_RUNTIME_PM_OPS(exynos5433_cmu_suspend, exynos5433_cmu_resume, + SET_RUNTIME_PM_OPS(exynos_arm64_cmu_suspend, exynos_arm64_cmu_resume, NULL) SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, pm_runtime_force_resume)