From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 36E563E95A4; Wed, 20 May 2026 18:05:51 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779300352; cv=none; b=AM96hltlcncAyzMsDMPr2a8g20yxtTb/FRGBBJfHyW8799FNGhpSiH0OypiJxz840fJsdvN/Peesvta3oPs8YVA4R4ngKn/CNBuyH63l7rEfvtMHxZH7ETBZm/iKsdg2Nuxl6J6exAY595E5vyNuH0d6WE4C3XecDMrrDIdG+n4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1779300352; c=relaxed/simple; bh=PWBCjXcOyxuVMRQb5yvzEy5X4Mugw880jR5VM1cmRq4=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=t1plCQoDMU4Qg+mku0A8gjS3eHAVqsAH8azGLhrGAFOd+6ejp9Yv85ROWNwK5fF30ggJrlXne2glzJrk3RFC3VGkkwwS2wvQDRMtaMJQDc6p0im8lELvljQADXJ6N52+8NciZt8WiJynfjDpbg5gePrptf/fv1xUJKVHs4D7Yg4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=plmNlkqb; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="plmNlkqb" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9C9D11F00893; Wed, 20 May 2026 18:05:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1779300351; bh=IsCMqE4/C9ON5YZ9FFqOh4ntL9MfVTTQoX9bG4+ZpHU=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=plmNlkqb03yxo3Gk4UVF/+YAd7R9M1d3GRvfyBB5MlRNUsucZEETdkvF4r3LsVtdl tmezy74RnAAGptkiNihH/gby/7tavYB9A27LFAPDxLqXOPLb/dnGi4rHd/d7t6im18 s7jnIHccAlqHKBdfMkB/T2r+AJgJ5kAqcKvmHFss= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Han Xu , Haibo Chen , Mark Brown , Sasha Levin Subject: [PATCH 6.12 142/666] spi: spi-nxp-fspi: enable runtime pm for fspi Date: Wed, 20 May 2026 18:15:53 +0200 Message-ID: <20260520162114.287421608@linuxfoundation.org> X-Mailer: git-send-email 2.54.0 In-Reply-To: <20260520162111.222830634@linuxfoundation.org> References: <20260520162111.222830634@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.12-stable review patch. If anyone has any objections, please let me know. ------------------ From: Haibo Chen [ Upstream commit 97be4b919a609fc8c4bd1118502b5d26cc2f77c4 ] Enable the runtime PM in fspi driver. Also for system PM, On some board like i.MX8ULP-EVK board, after system suspend, IOMUX module will lost power, so all the pinctrl setting will lost when system resume back, need driver to save/restore the pinctrl setting. Signed-off-by: Han Xu Signed-off-by: Haibo Chen Link: https://patch.msgid.link/20250428-flexspipatch-v3-2-61d5e8f591bc@nxp.com Signed-off-by: Mark Brown Stable-dep-of: 68c8c93fdb0d ("spi: nxp-fspi: Use reinit_completion() for repeated operations") Signed-off-by: Sasha Levin --- drivers/spi/spi-nxp-fspi.c | 93 +++++++++++++++++++++++++++++++------- 1 file changed, 76 insertions(+), 17 deletions(-) diff --git a/drivers/spi/spi-nxp-fspi.c b/drivers/spi/spi-nxp-fspi.c index a43540d7995ef..67bcc6d351326 100644 --- a/drivers/spi/spi-nxp-fspi.c +++ b/drivers/spi/spi-nxp-fspi.c @@ -48,6 +48,8 @@ #include #include #include +#include +#include #include #include #include @@ -57,6 +59,9 @@ #include #include +/* runtime pm timeout */ +#define FSPI_RPM_TIMEOUT 50 /* 50ms */ + /* Registers used by the driver */ #define FSPI_MCR0 0x00 #define FSPI_MCR0_AHB_TIMEOUT(x) ((x) << 24) @@ -396,6 +401,8 @@ struct nxp_fspi { struct mutex lock; struct pm_qos_request pm_qos_req; int selected; +#define FSPI_NEED_INIT (1 << 0) + int flags; }; static inline int needs_ip_only(struct nxp_fspi *f) @@ -935,6 +942,13 @@ static int nxp_fspi_exec_op(struct spi_mem *mem, const struct spi_mem_op *op) mutex_lock(&f->lock); + err = pm_runtime_get_sync(f->dev); + if (err < 0) { + mutex_unlock(&f->lock); + dev_err(f->dev, "Failed to enable clock %d\n", __LINE__); + return err; + } + /* Wait for controller being ready. */ err = fspi_readl_poll_tout(f, f->iobase + FSPI_STS0, FSPI_STS0_ARB_IDLE, 1, POLL_TOUT, true); @@ -963,8 +977,10 @@ static int nxp_fspi_exec_op(struct spi_mem *mem, const struct spi_mem_op *op) /* Invalidate the data in the AHB buffer. */ nxp_fspi_invalid(f); - mutex_unlock(&f->lock); + pm_runtime_mark_last_busy(f->dev); + pm_runtime_put_autosuspend(f->dev); + mutex_unlock(&f->lock); return err; } @@ -1231,9 +1247,14 @@ static int nxp_fspi_probe(struct platform_device *pdev) if (irq < 0) return dev_err_probe(dev, irq, "Failed to get irq source"); - ret = nxp_fspi_clk_prep_enable(f); - if (ret) - return dev_err_probe(dev, ret, "Can't enable the clock\n"); + pm_runtime_enable(dev); + pm_runtime_set_autosuspend_delay(dev, FSPI_RPM_TIMEOUT); + pm_runtime_use_autosuspend(dev); + + /* enable clock */ + ret = pm_runtime_get_sync(f->dev); + if (ret < 0) + return dev_err_probe(dev, ret, "Failed to enable clock"); /* Clear potential interrupts */ reg = fspi_readl(f, f->iobase + FSPI_INTR); @@ -1242,12 +1263,14 @@ static int nxp_fspi_probe(struct platform_device *pdev) nxp_fspi_default_setup(f); + ret = pm_runtime_put_sync(dev); + if (ret < 0) + return dev_err_probe(dev, ret, "Failed to disable clock"); + ret = devm_request_irq(dev, irq, nxp_fspi_irq_handler, 0, pdev->name, f); - if (ret) { - nxp_fspi_clk_disable_unprep(f); + if (ret) return dev_err_probe(dev, ret, "Failed to request irq\n"); - } ret = devm_mutex_init(dev, &f->lock); if (ret) @@ -1271,29 +1294,70 @@ static void nxp_fspi_remove(struct platform_device *pdev) { struct nxp_fspi *f = platform_get_drvdata(pdev); + /* enable clock first since there is reigster access */ + pm_runtime_get_sync(f->dev); + /* disable the hardware */ fspi_writel(f, FSPI_MCR0_MDIS, f->iobase + FSPI_MCR0); + pm_runtime_disable(f->dev); + pm_runtime_put_noidle(f->dev); nxp_fspi_clk_disable_unprep(f); if (f->ahb_addr) iounmap(f->ahb_addr); } -static int nxp_fspi_suspend(struct device *dev) +static int nxp_fspi_runtime_suspend(struct device *dev) { + struct nxp_fspi *f = dev_get_drvdata(dev); + + nxp_fspi_clk_disable_unprep(f); + return 0; } -static int nxp_fspi_resume(struct device *dev) +static int nxp_fspi_runtime_resume(struct device *dev) { struct nxp_fspi *f = dev_get_drvdata(dev); + int ret; - nxp_fspi_default_setup(f); + ret = nxp_fspi_clk_prep_enable(f); + if (ret) + return ret; - return 0; + if (f->flags & FSPI_NEED_INIT) { + nxp_fspi_default_setup(f); + ret = pinctrl_pm_select_default_state(dev); + if (ret) + dev_err(dev, "select flexspi default pinctrl failed!\n"); + f->flags &= ~FSPI_NEED_INIT; + } + + return ret; } +static int nxp_fspi_suspend(struct device *dev) +{ + struct nxp_fspi *f = dev_get_drvdata(dev); + int ret; + + ret = pinctrl_pm_select_sleep_state(dev); + if (ret) { + dev_err(dev, "select flexspi sleep pinctrl failed!\n"); + return ret; + } + + f->flags |= FSPI_NEED_INIT; + + return pm_runtime_force_suspend(dev); +} + +static const struct dev_pm_ops nxp_fspi_pm_ops = { + RUNTIME_PM_OPS(nxp_fspi_runtime_suspend, nxp_fspi_runtime_resume, NULL) + SYSTEM_SLEEP_PM_OPS(nxp_fspi_suspend, pm_runtime_force_resume) +}; + static const struct of_device_id nxp_fspi_dt_ids[] = { { .compatible = "nxp,lx2160a-fspi", .data = (void *)&lx2160a_data, }, { .compatible = "nxp,imx8mm-fspi", .data = (void *)&imx8mm_data, }, @@ -1313,17 +1377,12 @@ static const struct acpi_device_id nxp_fspi_acpi_ids[] = { MODULE_DEVICE_TABLE(acpi, nxp_fspi_acpi_ids); #endif -static const struct dev_pm_ops nxp_fspi_pm_ops = { - .suspend = nxp_fspi_suspend, - .resume = nxp_fspi_resume, -}; - static struct platform_driver nxp_fspi_driver = { .driver = { .name = "nxp-fspi", .of_match_table = nxp_fspi_dt_ids, .acpi_match_table = ACPI_PTR(nxp_fspi_acpi_ids), - .pm = &nxp_fspi_pm_ops, + .pm = pm_ptr(&nxp_fspi_pm_ops), }, .probe = nxp_fspi_probe, .remove_new = nxp_fspi_remove, -- 2.53.0