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Thu, 14 Aug 2025 22:17:47 -0700 (PDT) From: Guodong Xu Date: Fri, 15 Aug 2025 13:16:24 +0800 Subject: [PATCH v4 2/8] dmaengine: mmp_pdma: Add clock support Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20250815-working_dma_0701_v2-v4-2-62145ab6ea30@riscstar.com> References: <20250815-working_dma_0701_v2-v4-0-62145ab6ea30@riscstar.com> In-Reply-To: <20250815-working_dma_0701_v2-v4-0-62145ab6ea30@riscstar.com> To: Vinod Koul , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Yixun Lan , Philipp Zabel , Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexandre Ghiti , duje@dujemihanovic.xyz Cc: Alex Elder , Vivian Wang , dmaengine@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org, spacemit@lists.linux.dev, Guodong Xu , Troy Mitchell X-Mailer: b4 0.14.2 Add support for retrieving and enabling an optional clock during mmp_pdma_probe(). It is optional because in Marvell devices such as "marvell,pdma-1.0" the clocks property is not a required property. But in SpacemiT K1 PDMA, "spacemit,k1-pdma" as the dt binding schema file stated, clocks is required. Signed-off-by: Guodong Xu --- v4: Update the commit message, no source code change. v3: No change. v2: No change. --- drivers/dma/mmp_pdma.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/dma/mmp_pdma.c b/drivers/dma/mmp_pdma.c index a95d31103d3063a1d11177a1a37b89ac2fd213e9..4a6dbf55823722d26cc69379d22= aaa88fbe19313 100644 --- a/drivers/dma/mmp_pdma.c +++ b/drivers/dma/mmp_pdma.c @@ -15,6 +15,7 @@ #include #include #include +#include #include #include =20 @@ -1019,6 +1020,7 @@ static int mmp_pdma_probe(struct platform_device *op) { struct mmp_pdma_device *pdev; struct mmp_dma_platdata *pdata =3D dev_get_platdata(&op->dev); + struct clk *clk; int i, ret, irq =3D 0; int dma_channels =3D 0, irq_num =3D 0; const enum dma_slave_buswidth widths =3D @@ -1037,6 +1039,10 @@ static int mmp_pdma_probe(struct platform_device *op) if (IS_ERR(pdev->base)) return PTR_ERR(pdev->base); =20 + clk =3D devm_clk_get_optional_enabled(pdev->dev, NULL); + if (IS_ERR(clk)) + return PTR_ERR(clk); + if (pdev->dev->of_node) { /* Parse new and deprecated dma-channels properties */ if (of_property_read_u32(pdev->dev->of_node, "dma-channels", --=20 2.43.0