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Fri, 27 Mar 2026 10:42:50 -0700 (PDT) Received: from iku.example.org ([2a06:5906:61b:2d00:cad3:5596:28d0:27e3]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-43b9192e528sm15965933f8f.1.2026.03.27.10.42.49 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 27 Mar 2026 10:42:49 -0700 (PDT) From: Prabhakar X-Google-Original-From: Prabhakar To: Krzysztof Kozlowski , Rob Herring , Conor Dooley , Geert Uytterhoeven , Magnus Damm , Biju Das , Wolfram Sang Cc: linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, linux-renesas-soc@vger.kernel.org, Prabhakar , Fabrizio Castro , Lad Prabhakar Subject: [PATCH v2 2/3] memory: renesas-rpc-if: Fix duplicate device name on multi-instance platforms Date: Fri, 27 Mar 2026 17:42:44 +0000 Message-ID: <20260327174245.3947213-3-prabhakar.mahadev-lad.rj@bp.renesas.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260327174245.3947213-1-prabhakar.mahadev-lad.rj@bp.renesas.com> References: <20260327174245.3947213-1-prabhakar.mahadev-lad.rj@bp.renesas.com> 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" From: Lad Prabhakar On platforms with multiple xSPI instances, the driver fails to probe additional instances due to duplicate sysfs entries: [ 86.878242] sysfs: cannot create duplicate filename '/bus/platform/dev= ices/rpc-if-spi' This occurs because platform_device_alloc() uses pdev->id for the device ID, which may be PLATFORM_DEVID_NONE (-1) for multiple instances, causing all instances to attempt registration with the same name. Fix this by using PLATFORM_DEVID_AUTO instead, which automatically assigns unique IDs to each device instance, allowing multiple xSPI controllers to coexist without naming conflicts. Signed-off-by: Lad Prabhakar Reviewed-by: Wolfram Sang --- v1->v2: - Add RB tag from Wolfram for the rpc-if duplicate device name patch. --- drivers/memory/renesas-rpc-if.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/memory/renesas-rpc-if.c b/drivers/memory/renesas-rpc-i= f.c index 0fb568456164..3755956ae906 100644 --- a/drivers/memory/renesas-rpc-if.c +++ b/drivers/memory/renesas-rpc-if.c @@ -1034,7 +1034,7 @@ static int rpcif_probe(struct platform_device *pdev) return dev_err_probe(dev, PTR_ERR(rpc->spi_clk), "cannot get enabled spi clk\n"); =20 - vdev =3D platform_device_alloc(name, pdev->id); + vdev =3D platform_device_alloc(name, PLATFORM_DEVID_AUTO); if (!vdev) return -ENOMEM; vdev->dev.parent =3D dev; --=20 2.53.0