From nobody Mon Feb 9 05:53:30 2026 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 D17813BE487; Thu, 22 Jan 2026 16:09:09 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769098149; cv=none; b=HRK86nOfMFCx2FsaF2I3qruXSGOFWPNwUpIuTpG91/ZfbuWK1uWHExex+ogEvfu1EoH1hJJvVx2dr4hn1SoIoJaniWzpHFxlD/MkXVMQi6vh9hE+igyktygGIQvNliPduEUqDg6bbIuDfwrv/xzbStVIMuOkTstnnLIXA3Ntw+g= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769098149; c=relaxed/simple; bh=1oFV/VTuEmXKj9VfbsDu/B9vL9XgmwfbNs7cuVNQNWI=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=LTtOaPed3AJ/ApfJelKrhrLv//xyaHluC9GRjzqz1GoJ7kQSUhip1XH0XktHXUQpgm2sm5VP19yCbSzpltPcCy64B08fGgdurmfg7wnsBnGtD8aOetCqKybEBHBCeMQT8spbUTIbpiGchNXKiQVrTPnY1P36/ZQgoRcZdFbVGCI= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=ZEbhmzCz; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="ZEbhmzCz" Received: by smtp.kernel.org (Postfix) with ESMTPSA id A7531C116C6; Thu, 22 Jan 2026 16:09:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1769098148; bh=1oFV/VTuEmXKj9VfbsDu/B9vL9XgmwfbNs7cuVNQNWI=; h=From:To:Cc:Subject:Date:From; b=ZEbhmzCz7y30gq+2KF1+lr5+37rEd89J5jCWhZ9zbhR+nnqmvRdiCXfkkXckJLELk NBbreT5mEws0Naj1IykbMcsPlyfFfdgA7brhVRWh6D0WaB5n2cBlg0SrzoZ9xYfMxd CsvQhZvtjDSLS7KXp3/Xz1HUpxiVqi0CZkN9GaPuFdrOQXvwNz9yjWcESuHJnCNSwi GzsLA2/+2wQ2NIul+7Jd/AfRMvIUI4rynGr8BZdN27+IWVc9ErxjX6GHrmcpzRy1Q3 k3ypoC/0uT6pCDhzgdQPn2wPlbsClohGjpxUO7TdF4wijG9VYl/GHxDYwETSYScQVb 5rFjObbnP1DKg== From: Jisheng Zhang To: Mark Brown Cc: linux-spi@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH] spi: dw-mmio: support suspend/resume Date: Thu, 22 Jan 2026 23:50:46 +0800 Message-ID: <20260122155046.12848-1-jszhang@kernel.org> X-Mailer: git-send-email 2.51.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Add system wide suspend and resume support, the implementation is straightforward, just call spi_controller_suspend() then assert the reset and disable clks for suspend, enable clks and deassert reset then call spi_controller_resume() for resume. Signed-off-by: Jisheng Zhang --- drivers/spi/spi-dw-mmio.c | 33 +++++++++++++++++++++++++++++++++ 1 file changed, 33 insertions(+) diff --git a/drivers/spi/spi-dw-mmio.c b/drivers/spi/spi-dw-mmio.c index 33239b4778cb..b8123db4ad55 100644 --- a/drivers/spi/spi-dw-mmio.c +++ b/drivers/spi/spi-dw-mmio.c @@ -392,6 +392,38 @@ static int dw_spi_mmio_probe(struct platform_device *p= dev) return ret; } =20 +static int dw_spi_mmio_suspend(struct device *dev) +{ + struct dw_spi_mmio *dwsmmio =3D dev_get_drvdata(dev); + int ret; + + ret =3D dw_spi_suspend_controller(&dwsmmio->dws); + if (ret) + return ret; + + reset_control_assert(dwsmmio->rstc); + + clk_disable_unprepare(dwsmmio->pclk); + clk_disable_unprepare(dwsmmio->clk); + + return 0; +} + +static int dw_spi_mmio_resume(struct device *dev) +{ + struct dw_spi_mmio *dwsmmio =3D dev_get_drvdata(dev); + + clk_prepare_enable(dwsmmio->clk); + clk_prepare_enable(dwsmmio->pclk); + + reset_control_deassert(dwsmmio->rstc); + + return dw_spi_resume_controller(&dwsmmio->dws); +} + +static DEFINE_SIMPLE_DEV_PM_OPS(dw_spi_mmio_pm_ops, + dw_spi_mmio_suspend, dw_spi_mmio_resume); + static void dw_spi_mmio_remove(struct platform_device *pdev) { struct dw_spi_mmio *dwsmmio =3D platform_get_drvdata(pdev); @@ -435,6 +467,7 @@ static struct platform_driver dw_spi_mmio_driver =3D { .name =3D DRIVER_NAME, .of_match_table =3D dw_spi_mmio_of_match, .acpi_match_table =3D ACPI_PTR(dw_spi_mmio_acpi_match), + .pm =3D pm_sleep_ptr(&dw_spi_mmio_pm_ops), }, }; module_platform_driver(dw_spi_mmio_driver); --=20 2.51.0