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b=CJRdsx3ZnYjQiURA3jbjwk+GFY7Fqby0xLMgKfYfax6VlbU16WPGCIylgKt3AqWGgIxH5d fQSfQd1YqYFKWf+zu8EqoMPFwAhXcPI5V7nLQQ5EvrMDv92lEsa48bG8UrYKjr/jaNrbQw XeEf0eCZ9y1RuaOPkmCk6sW7xpQsnUVRBJUlt76NuKs8Xid7j3fmdaNAYuBX0+FCkAUQt1 DASdw6VulebrWxs78+gi2WBOhjOFGBaWjhaybbt0tGJ4Oh8gTpEGkckgU+AwQzzA3i3nU0 crVehfN91F+jEsZcez7QOWsXuwflJzBUZRs5XtP9tUm7RWgBqOfRdIgn1zxFVw== From: Jean-Michel Hautbois Date: Mon, 24 Nov 2025 13:50:24 +0100 Subject: [PATCH 3/7] dma: mcf-edma: Add per-channel IRQ naming for debugging 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: <20251124-dma-coldfire-v1-3-dc8f93185464@yoseli.org> References: <20251124-dma-coldfire-v1-0-dc8f93185464@yoseli.org> In-Reply-To: <20251124-dma-coldfire-v1-0-dc8f93185464@yoseli.org> To: Frank Li , Vinod Koul Cc: Greg Ungerer , imx@lists.linux.dev, dmaengine@vger.kernel.org, linux-m68k@lists.linux-m68k.org, linux-kernel@vger.kernel.org, Jean-Michel Hautbois X-Mailer: b4 0.14.2 X-Developer-Signature: v=1; a=ed25519-sha256; t=1763988624; l=2436; i=jeanmichel.hautbois@yoseli.org; s=20240925; h=from:subject:message-id; bh=PxyHjH/UiLxDT0MWhbZ4dz/BirBhchQz9nA3F2FTYp8=; b=bco11Z9osduN8tdyp+sOFgrSrlK9smZin/Ub2zzTWzUUv3LzWlg7qMttYwb7bjWil7DtHqtBh odXXRGQD2zlDML7pghxGGGgcQnRD73PgJT+tUSJKZcNOJ/xbgpOADJo X-Developer-Key: i=jeanmichel.hautbois@yoseli.org; a=ed25519; pk=MsMTVmoV69wLIlSkHlFoACIMVNQFyvJzvsJSQsn/kq4= X-GND-State: clean X-GND-Score: -100 X-GND-Cause: gggruggvucftvghtrhhoucdtuddrgeeffedrtdeggddvfeekieegucetufdoteggodetrfdotffvucfrrhhofhhilhgvmecuifetpfffkfdpucggtfgfnhhsuhgsshgtrhhisggvnecuuegrihhlohhuthemuceftddunecusecvtfgvtghiphhivghnthhsucdlqddutddtmdenucfjughrpefhfffugggtgffkfhgjvfevofesthejredtredtjeenucfhrhhomheplfgvrghnqdfoihgthhgvlhcujfgruhhtsghoihhsuceojhgvrghnmhhitghhvghlrdhhrghuthgsohhisheshihoshgvlhhirdhorhhgqeenucggtffrrghtthgvrhhnpeffjefhtdelhffhheevheeutefghfefteeluedvudfhgeegteeitddtuefhhfelteenucfkphepvdgrtddumegvtdgrmeduieelmeejudegtdemkeeksgefmeehudehfeemtgdvieegmeegfhgsnecuvehluhhsthgvrhfuihiivgeptdenucfrrghrrghmpehinhgvthepvdgrtddumegvtdgrmeduieelmeejudegtdemkeeksgefmeehudehfeemtgdvieegmeegfhgspdhhvghlohephihoshgvlhhiqdihohgtthhordihohhsvghlihdrohhrghdpmhgrihhlfhhrohhmpehjvggrnhhmihgthhgvlhdrhhgruhhtsghoihhsseihohhsvghlihdrohhrghdpnhgspghrtghpthhtohepkedprhgtphhtthhopegumhgrvghnghhinhgvsehvghgvrhdrkhgvrhhnvghlrdhorhhgpdhrtghpthhtohepjhgvrghnmhhitghhvghlrdhhrghuthgsohhisheshihoshgvlhhirdhorhhgpdhrt ghpthhtohepghgvrhhgsehlihhnuhigqdhmieekkhdrohhrghdprhgtphhtthhopefhrhgrnhhkrdfnihesnhigphdrtghomhdprhgtphhtthhopehvkhhouhhlsehkvghrnhgvlhdrohhrghdprhgtphhtthhopehlihhnuhigqdhkvghrnhgvlhesvhhgvghrrdhkvghrnhgvlhdrohhrghdprhgtphhtthhopehimhigsehlihhsthhsrdhlihhnuhigrdguvghvpdhrtghpthhtoheplhhinhhugidqmheikehksehlihhsthhsrdhlihhnuhigqdhmieekkhdrohhrgh X-GND-Sasl: jeanmichel.hautbois@yoseli.org Add dynamic per-channel IRQ naming to make DMA interrupt identification easier in /proc/interrupts and debugging tools. Instead of all channels showing "eDMA", they now show: - "eDMA-0" through "eDMA-15" for channels 0-15 - "eDMA-16" through "eDMA-55" for channels 16-55 - "eDMA-tx-56" for the shared channel 56-63 interrupt - "eDMA-err" for the error interrupt This aids debugging DMA issues by making it clear which channel's interrupt is being serviced. Signed-off-by: Jean-Michel Hautbois --- drivers/dma/mcf-edma-main.c | 20 ++++++++++++++------ 1 file changed, 14 insertions(+), 6 deletions(-) diff --git a/drivers/dma/mcf-edma-main.c b/drivers/dma/mcf-edma-main.c index f95114829d8006fe4558169888ff38037d7610de..8a7c1787adb1f66f3b672990363= 5b072218afad1 100644 --- a/drivers/dma/mcf-edma-main.c +++ b/drivers/dma/mcf-edma-main.c @@ -81,8 +81,12 @@ static int mcf_edma_irq_init(struct platform_device *pde= v, if (!res) return -1; =20 - for (ret =3D 0, i =3D res->start; i <=3D res->end; ++i) - ret |=3D request_irq(i, mcf_edma_tx_handler, 0, "eDMA", mcf_edma); + for (ret =3D 0, i =3D res->start; i <=3D res->end; ++i) { + char *irq_name =3D devm_kasprintf(&pdev->dev, GFP_KERNEL, + "eDMA-%d", i - res->start); + + ret |=3D request_irq(i, mcf_edma_tx_handler, 0, irq_name, mcf_edma); + } if (ret) return ret; =20 @@ -91,15 +95,19 @@ static int mcf_edma_irq_init(struct platform_device *pd= ev, if (!res) return -1; =20 - for (ret =3D 0, i =3D res->start; i <=3D res->end; ++i) - ret |=3D request_irq(i, mcf_edma_tx_handler, 0, "eDMA", mcf_edma); + for (ret =3D 0, i =3D res->start; i <=3D res->end; ++i) { + char *irq_name =3D devm_kasprintf(&pdev->dev, GFP_KERNEL, + "eDMA-%d", 16 + i - res->start); + + ret |=3D request_irq(i, mcf_edma_tx_handler, 0, irq_name, mcf_edma); + } if (ret) return ret; =20 ret =3D platform_get_irq_byname(pdev, "edma-tx-56-63"); if (ret !=3D -ENXIO) { ret =3D request_irq(ret, mcf_edma_tx_handler, - 0, "eDMA", mcf_edma); + 0, "eDMA-tx-56", mcf_edma); if (ret) return ret; } @@ -107,7 +115,7 @@ static int mcf_edma_irq_init(struct platform_device *pd= ev, ret =3D platform_get_irq_byname(pdev, "edma-err"); if (ret !=3D -ENXIO) { ret =3D request_irq(ret, mcf_edma_err_handler, - 0, "eDMA", mcf_edma); + 0, "eDMA-err", mcf_edma); if (ret) return ret; } --=20 2.39.5