From patchwork Thu Mar 21 13:14:02 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shengjiu Wang X-Patchwork-Id: 13598748 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id F3425C54E58 for ; Thu, 21 Mar 2024 13:31:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:List-Subscribe:List-Help: List-Post:List-Archive:List-Unsubscribe:List-Id:Message-Id:Date:Subject:Cc:To :From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=fmus4tVNAmYxMG/UC0obnsje5xeHXWw+5jXEWmA2MpY=; b=OxW6fTBbDaTlTy /DNmmNl7BiSqUwsa0ULbMYnNhS5JDSilVJVa+qs2WRIqTuAwJFC4j08kJVvAnkmAFZVp0F+DVVn9a oxzfYwwhoKIyadCV89cvrmoiLEAPQ8srb/xwejbcN74GsSD9OFCrV6IDrqeh4qdkbVjRCor+JQgMw s9wISsbCcX2OZuq+bLKkMg9UxEyxzPV2z99o/5RPhUq9r62YdyyLz6FSUYC3xkh0AwcFazdyDFlHZ GvRr2+0dDI08sun0H1nCcpV/CaK71ytPk0tTlLLXcXAwVqBLVEX84EsJQTEnBYQWDqNWB8eBpaPhl GNIEa7zuo1TN4binUR3Q==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1rnIVQ-000000037jf-2PUi; Thu, 21 Mar 2024 13:30:52 +0000 Received: from inva020.nxp.com ([92.121.34.13]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1rnIVI-000000037j4-00kA for linux-arm-kernel@lists.infradead.org; Thu, 21 Mar 2024 13:30:45 +0000 Received: from inva020.nxp.com (localhost [127.0.0.1]) by inva020.eu-rdc02.nxp.com (Postfix) with ESMTP id 385201A080B; Thu, 21 Mar 2024 14:30:40 +0100 (CET) Received: from aprdc01srsp001v.ap-rdc01.nxp.com (aprdc01srsp001v.ap-rdc01.nxp.com [165.114.16.16]) by inva020.eu-rdc02.nxp.com (Postfix) with ESMTP id A38B21A0101; Thu, 21 Mar 2024 14:30:39 +0100 (CET) Received: from localhost.localdomain (shlinux2.ap.freescale.net [10.192.224.44]) by aprdc01srsp001v.ap-rdc01.nxp.com (Postfix) with ESMTP id 6834B1834868; Thu, 21 Mar 2024 21:30:37 +0800 (+08) From: Shengjiu Wang To: abelvesa@kernel.org, peng.fan@nxp.com, mturquette@baylibre.com, sboyd@kernel.org, shawnguo@kernel.org, s.hauer@pengutronix.de, kernel@pengutronix.de, festevam@gmail.com, linux-imx@nxp.com, shengjiu.wang@gmail.com Cc: linux-clk@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: [PATCH v4] clk: imx: imx8mp: Add pm_runtime support for power saving Date: Thu, 21 Mar 2024 21:14:02 +0800 Message-Id: <1711026842-7268-1-git-send-email-shengjiu.wang@nxp.com> X-Mailer: git-send-email 2.7.4 X-Virus-Scanned: ClamAV using ClamSMTP X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240321_063044_337676_278F6ECD X-CRM114-Status: GOOD ( 23.97 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Add pm_runtime support for power saving. In pm runtime suspend state the registers will be reseted, so add registers save in pm runtime suspend and restore them in pm runtime resume. Signed-off-by: Shengjiu Wang Reviewed-by: Peng Fan Reviewed-by: Marc Kleine-Budde --- changes in v4: - use struct clk_hw_onecell_data clk_data in priv struct changes in v3: - remove REGS_NUM, use the ARRAY_SIZE - merge clk_imx8mp_audiomix_drvdata and clk_hw_onecell_data together. changes in v2: - move pm_runtime_enable before the clk register drivers/clk/imx/clk-imx8mp-audiomix.c | 157 ++++++++++++++++++++++---- 1 file changed, 136 insertions(+), 21 deletions(-) diff --git a/drivers/clk/imx/clk-imx8mp-audiomix.c b/drivers/clk/imx/clk-imx8mp-audiomix.c index 55ed211a5e0b..574a032309c1 100644 --- a/drivers/clk/imx/clk-imx8mp-audiomix.c +++ b/drivers/clk/imx/clk-imx8mp-audiomix.c @@ -7,10 +7,12 @@ #include #include +#include #include #include #include #include +#include #include @@ -18,6 +20,7 @@ #define CLKEN0 0x000 #define CLKEN1 0x004 +#define EARC 0x200 #define SAI1_MCLK_SEL 0x300 #define SAI2_MCLK_SEL 0x304 #define SAI3_MCLK_SEL 0x308 @@ -26,6 +29,11 @@ #define SAI7_MCLK_SEL 0x314 #define PDM_SEL 0x318 #define SAI_PLL_GNRL_CTL 0x400 +#define SAI_PLL_FDIVL_CTL0 0x404 +#define SAI_PLL_FDIVL_CTL1 0x408 +#define SAI_PLL_SSCG_CTL 0x40C +#define SAI_PLL_MNIT_CTL 0x410 +#define IPG_LP_CTRL 0x504 #define SAIn_MCLK1_PARENT(n) \ static const struct clk_parent_data \ @@ -182,26 +190,82 @@ static struct clk_imx8mp_audiomix_sel sels[] = { CLK_SAIn(7) }; +static const u16 audiomix_regs[] = { + CLKEN0, + CLKEN1, + EARC, + SAI1_MCLK_SEL, + SAI2_MCLK_SEL, + SAI3_MCLK_SEL, + SAI5_MCLK_SEL, + SAI6_MCLK_SEL, + SAI7_MCLK_SEL, + PDM_SEL, + SAI_PLL_GNRL_CTL, + SAI_PLL_FDIVL_CTL0, + SAI_PLL_FDIVL_CTL1, + SAI_PLL_SSCG_CTL, + SAI_PLL_MNIT_CTL, + IPG_LP_CTRL, +}; + +struct clk_imx8mp_audiomix_priv { + void __iomem *base; + u32 regs_save[ARRAY_SIZE(audiomix_regs)]; + + /* Must be last */ + struct clk_hw_onecell_data clk_data; +}; + +static void clk_imx8mp_audiomix_save_restore(struct device *dev, bool save) +{ + struct clk_imx8mp_audiomix_priv *priv = dev_get_drvdata(dev); + void __iomem *base = priv->base; + int i; + + if (save) { + for (i = 0; i < ARRAY_SIZE(audiomix_regs); i++) + priv->regs_save[i] = readl(base + audiomix_regs[i]); + } else { + for (i = 0; i < ARRAY_SIZE(audiomix_regs); i++) + writel(priv->regs_save[i], base + audiomix_regs[i]); + } +} + static int clk_imx8mp_audiomix_probe(struct platform_device *pdev) { - struct clk_hw_onecell_data *priv; + struct clk_imx8mp_audiomix_priv *priv; + struct clk_hw_onecell_data *clk_hw_data; struct device *dev = &pdev->dev; void __iomem *base; struct clk_hw *hw; - int i; + int i, ret; priv = devm_kzalloc(dev, - struct_size(priv, hws, IMX8MP_CLK_AUDIOMIX_END), + struct_size(priv, clk_data.hws, IMX8MP_CLK_AUDIOMIX_END), GFP_KERNEL); if (!priv) return -ENOMEM; - priv->num = IMX8MP_CLK_AUDIOMIX_END; + clk_hw_data = &priv->clk_data; + clk_hw_data->num = IMX8MP_CLK_AUDIOMIX_END; base = devm_platform_ioremap_resource(pdev, 0); if (IS_ERR(base)) return PTR_ERR(base); + priv->base = base; + dev_set_drvdata(dev, priv); + + /* + * pm_runtime_enable needs to be called before clk register. + * That is to make core->rpm_enabled to be true for clock + * usage. + */ + pm_runtime_get_noresume(dev); + pm_runtime_set_active(dev); + pm_runtime_enable(dev); + for (i = 0; i < ARRAY_SIZE(sels); i++) { if (sels[i].num_parents == 1) { hw = devm_clk_hw_register_gate_parent_data(dev, @@ -216,10 +280,12 @@ static int clk_imx8mp_audiomix_probe(struct platform_device *pdev) 0, NULL, NULL); } - if (IS_ERR(hw)) - return PTR_ERR(hw); + if (IS_ERR(hw)) { + ret = PTR_ERR(hw); + goto err_clk_register; + } - priv->hws[sels[i].clkid] = hw; + clk_hw_data->hws[sels[i].clkid] = hw; } /* SAI PLL */ @@ -228,39 +294,86 @@ static int clk_imx8mp_audiomix_probe(struct platform_device *pdev) ARRAY_SIZE(clk_imx8mp_audiomix_pll_parents), CLK_SET_RATE_NO_REPARENT, base + SAI_PLL_GNRL_CTL, 0, 2, 0, NULL, NULL); - priv->hws[IMX8MP_CLK_AUDIOMIX_SAI_PLL_REF_SEL] = hw; + clk_hw_data->hws[IMX8MP_CLK_AUDIOMIX_SAI_PLL_REF_SEL] = hw; hw = imx_dev_clk_hw_pll14xx(dev, "sai_pll", "sai_pll_ref_sel", base + 0x400, &imx_1443x_pll); - if (IS_ERR(hw)) - return PTR_ERR(hw); - priv->hws[IMX8MP_CLK_AUDIOMIX_SAI_PLL] = hw; + if (IS_ERR(hw)) { + ret = PTR_ERR(hw); + goto err_clk_register; + } + clk_hw_data->hws[IMX8MP_CLK_AUDIOMIX_SAI_PLL] = hw; hw = devm_clk_hw_register_mux_parent_data_table(dev, "sai_pll_bypass", clk_imx8mp_audiomix_pll_bypass_sels, ARRAY_SIZE(clk_imx8mp_audiomix_pll_bypass_sels), CLK_SET_RATE_NO_REPARENT | CLK_SET_RATE_PARENT, base + SAI_PLL_GNRL_CTL, 16, 1, 0, NULL, NULL); - if (IS_ERR(hw)) - return PTR_ERR(hw); - priv->hws[IMX8MP_CLK_AUDIOMIX_SAI_PLL_BYPASS] = hw; + if (IS_ERR(hw)) { + ret = PTR_ERR(hw); + goto err_clk_register; + } + + clk_hw_data->hws[IMX8MP_CLK_AUDIOMIX_SAI_PLL_BYPASS] = hw; hw = devm_clk_hw_register_gate(dev, "sai_pll_out", "sai_pll_bypass", 0, base + SAI_PLL_GNRL_CTL, 13, 0, NULL); - if (IS_ERR(hw)) - return PTR_ERR(hw); - priv->hws[IMX8MP_CLK_AUDIOMIX_SAI_PLL_OUT] = hw; + if (IS_ERR(hw)) { + ret = PTR_ERR(hw); + goto err_clk_register; + } + clk_hw_data->hws[IMX8MP_CLK_AUDIOMIX_SAI_PLL_OUT] = hw; hw = devm_clk_hw_register_fixed_factor(dev, "sai_pll_out_div2", "sai_pll_out", 0, 1, 2); - if (IS_ERR(hw)) - return PTR_ERR(hw); + if (IS_ERR(hw)) { + ret = PTR_ERR(hw); + goto err_clk_register; + } + + ret = devm_of_clk_add_hw_provider(&pdev->dev, of_clk_hw_onecell_get, + clk_hw_data); + if (ret) + goto err_clk_register; + + pm_runtime_put_sync(dev); + return 0; + +err_clk_register: + pm_runtime_put_sync(dev); + pm_runtime_disable(dev); + return ret; +} + +static int clk_imx8mp_audiomix_remove(struct platform_device *pdev) +{ + pm_runtime_disable(&pdev->dev); + + return 0; +} + +static int clk_imx8mp_audiomix_runtime_suspend(struct device *dev) +{ + clk_imx8mp_audiomix_save_restore(dev, true); - return devm_of_clk_add_hw_provider(&pdev->dev, of_clk_hw_onecell_get, - priv); + return 0; } +static int clk_imx8mp_audiomix_runtime_resume(struct device *dev) +{ + clk_imx8mp_audiomix_save_restore(dev, false); + + return 0; +} + +static const struct dev_pm_ops clk_imx8mp_audiomix_pm_ops = { + SET_RUNTIME_PM_OPS(clk_imx8mp_audiomix_runtime_suspend, + clk_imx8mp_audiomix_runtime_resume, NULL) + SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, + pm_runtime_force_resume) +}; + static const struct of_device_id clk_imx8mp_audiomix_of_match[] = { { .compatible = "fsl,imx8mp-audio-blk-ctrl" }, { /* sentinel */ } @@ -269,9 +382,11 @@ MODULE_DEVICE_TABLE(of, clk_imx8mp_audiomix_of_match); static struct platform_driver clk_imx8mp_audiomix_driver = { .probe = clk_imx8mp_audiomix_probe, + .remove = clk_imx8mp_audiomix_remove, .driver = { .name = "imx8mp-audio-blk-ctrl", .of_match_table = clk_imx8mp_audiomix_of_match, + .pm = &clk_imx8mp_audiomix_pm_ops, }, };