From patchwork Wed Apr 3 05:32:58 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yoshihiro Shimoda X-Patchwork-Id: 13614959 X-Patchwork-Delegate: geert@linux-m68k.org Received: from relmlie5.idc.renesas.com (relmlor1.renesas.com [210.160.252.171]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 2FA9546537; Wed, 3 Apr 2024 05:33:10 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=210.160.252.171 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712122393; cv=none; b=MiDCJqHRXCcjIWOTMAh4CypsHVHFgUf2fVFkitIbkShZ0Gi5swocS0oigKJ6AT9mJ0Kfa9hM7kXxJ25VbGoPpo9PHycNjqvPCoSJXkLJwdxrx6wIqmHOun2L7jHqpZn/WY8Xr7Pyp0b9hURLffr8rGepAJrEMkqYObs21NNESA4= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712122393; c=relaxed/simple; bh=QHWTwOOMMPET8PzAlJc3PFCQ9tLxuzBQFNBgnWpopiA=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=BqZrA8efF+1xTMKvpUgp11fGNk3kA3+0Xaw+bbHkgzBRv2DFvkycrSGMUKNNFMHiAvzTdP4fRZuxsRRPqyBphCSyvNtykHTjfrpeh4rfaVFYY6NxQw4NSJyyQ/Ww7wByoPtjsiYufuN9xowguOnnoBfM7q2OXswPstT4+GzLXSs= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=renesas.com; spf=pass smtp.mailfrom=renesas.com; arc=none smtp.client-ip=210.160.252.171 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=renesas.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=renesas.com X-IronPort-AV: E=Sophos;i="6.07,176,1708354800"; d="scan'208";a="200195936" Received: from unknown (HELO relmlir5.idc.renesas.com) ([10.200.68.151]) by relmlie5.idc.renesas.com with ESMTP; 03 Apr 2024 14:33:08 +0900 Received: from localhost.localdomain (unknown [10.166.13.99]) by relmlir5.idc.renesas.com (Postfix) with ESMTP id A171240029A6; Wed, 3 Apr 2024 14:33:08 +0900 (JST) From: Yoshihiro Shimoda To: lpieralisi@kernel.org, kw@linux.com, robh@kernel.org, bhelgaas@google.com, krzysztof.kozlowski+dt@linaro.org, conor+dt@kernel.org, jingoohan1@gmail.com, mani@kernel.org Cc: marek.vasut+renesas@gmail.com, linux-pci@vger.kernel.org, devicetree@vger.kernel.org, linux-renesas-soc@vger.kernel.org, Yoshihiro Shimoda , Conor Dooley , Geert Uytterhoeven Subject: [PATCH v4 1/7] dt-bindings: PCI: rcar-gen4-pci-host: Add R-Car V4H compatible Date: Wed, 3 Apr 2024 14:32:58 +0900 Message-Id: <20240403053304.3695096-2-yoshihiro.shimoda.uh@renesas.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20240403053304.3695096-1-yoshihiro.shimoda.uh@renesas.com> References: <20240403053304.3695096-1-yoshihiro.shimoda.uh@renesas.com> Precedence: bulk X-Mailing-List: linux-renesas-soc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Document bindings for R-Car V4H (R8A779G0) PCIe host module. Signed-off-by: Yoshihiro Shimoda Acked-by: Conor Dooley Reviewed-by: Geert Uytterhoeven --- Documentation/devicetree/bindings/pci/rcar-gen4-pci-host.yaml | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/Documentation/devicetree/bindings/pci/rcar-gen4-pci-host.yaml b/Documentation/devicetree/bindings/pci/rcar-gen4-pci-host.yaml index ffb34339b637..955c664f1fbb 100644 --- a/Documentation/devicetree/bindings/pci/rcar-gen4-pci-host.yaml +++ b/Documentation/devicetree/bindings/pci/rcar-gen4-pci-host.yaml @@ -16,7 +16,9 @@ allOf: properties: compatible: items: - - const: renesas,r8a779f0-pcie # R-Car S4-8 + - enum: + - renesas,r8a779f0-pcie # R-Car S4-8 + - renesas,r8a779g0-pcie # R-Car V4H - const: renesas,rcar-gen4-pcie # R-Car Gen4 reg: From patchwork Wed Apr 3 05:32:59 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yoshihiro Shimoda X-Patchwork-Id: 13614962 X-Patchwork-Delegate: geert@linux-m68k.org Received: from relmlie6.idc.renesas.com (relmlor2.renesas.com [210.160.252.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id DE8394CB4E; Wed, 3 Apr 2024 05:33:14 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=210.160.252.172 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712122396; cv=none; b=B/LCdSa6eLzWqwyjiuRAg3/aDl+jv+QiSuodCrXV0Ny7zPr5s6BFwZgO6hzCywVSnuO6i+wrvpbr+721qIaDklINGwVBp1iR2aZ2DqxJb1QIwbKiCqwKNOa2qIvgGBWxPOIvAQc03k63LpQpJkenQhjKMBC4Xz38jhz4l2V2zB0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712122396; c=relaxed/simple; bh=dGonVUKvl7liV10e3coRejTBfxj+bpKkbHKvOrjwuug=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=r+FyRkM6V79Cuyh3+0gx6pByvigwKWx1hwCqcjS/cjYKysuZwkW3/P1kMjpTLEEXHTpRGmJwI4suPean/+nS5JthKijeudUh8ex6ix1OW2WCOlMIB9gPJTvZu/YDOKMl55o/xgQL6g4dmLNY645/rq1L2OPUGbAzuW862+niAhA= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=renesas.com; spf=pass smtp.mailfrom=renesas.com; arc=none smtp.client-ip=210.160.252.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=renesas.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=renesas.com X-IronPort-AV: E=Sophos;i="6.07,176,1708354800"; d="scan'208";a="204148819" Received: from unknown (HELO relmlir5.idc.renesas.com) ([10.200.68.151]) by relmlie6.idc.renesas.com with ESMTP; 03 Apr 2024 14:33:08 +0900 Received: from localhost.localdomain (unknown [10.166.13.99]) by relmlir5.idc.renesas.com (Postfix) with ESMTP id CA89C40029A6; Wed, 3 Apr 2024 14:33:08 +0900 (JST) From: Yoshihiro Shimoda To: lpieralisi@kernel.org, kw@linux.com, robh@kernel.org, bhelgaas@google.com, krzysztof.kozlowski+dt@linaro.org, conor+dt@kernel.org, jingoohan1@gmail.com, mani@kernel.org Cc: marek.vasut+renesas@gmail.com, linux-pci@vger.kernel.org, devicetree@vger.kernel.org, linux-renesas-soc@vger.kernel.org, Yoshihiro Shimoda , Conor Dooley , Geert Uytterhoeven Subject: [PATCH v4 2/7] dt-bindings: PCI: rcar-gen4-pci-ep: Add R-Car V4H compatible Date: Wed, 3 Apr 2024 14:32:59 +0900 Message-Id: <20240403053304.3695096-3-yoshihiro.shimoda.uh@renesas.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20240403053304.3695096-1-yoshihiro.shimoda.uh@renesas.com> References: <20240403053304.3695096-1-yoshihiro.shimoda.uh@renesas.com> Precedence: bulk X-Mailing-List: linux-renesas-soc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Document bindings for R-Car V4H (R8A779G0) PCIe endpoint module. Signed-off-by: Yoshihiro Shimoda Acked-by: Conor Dooley Reviewed-by: Geert Uytterhoeven --- Documentation/devicetree/bindings/pci/rcar-gen4-pci-ep.yaml | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/Documentation/devicetree/bindings/pci/rcar-gen4-pci-ep.yaml b/Documentation/devicetree/bindings/pci/rcar-gen4-pci-ep.yaml index fe38f62da066..91b81ac75592 100644 --- a/Documentation/devicetree/bindings/pci/rcar-gen4-pci-ep.yaml +++ b/Documentation/devicetree/bindings/pci/rcar-gen4-pci-ep.yaml @@ -16,7 +16,9 @@ allOf: properties: compatible: items: - - const: renesas,r8a779f0-pcie-ep # R-Car S4-8 + - enum: + - renesas,r8a779f0-pcie-ep # R-Car S4-8 + - renesas,r8a779g0-pcie-ep # R-Car V4H - const: renesas,rcar-gen4-pcie-ep # R-Car Gen4 reg: From patchwork Wed Apr 3 05:33:00 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yoshihiro Shimoda X-Patchwork-Id: 13614964 X-Patchwork-Delegate: geert@linux-m68k.org Received: from relmlie6.idc.renesas.com (relmlor2.renesas.com [210.160.252.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id AED424CB55; Wed, 3 Apr 2024 05:33:15 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=210.160.252.172 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712122397; cv=none; b=Y0b6gD2BcGwBk/3mUpcnZ2rY0tnI6V/xoRs7vaNVvuyBE1ObXlio63IbzTBUz6pe8Z6DfoWB7VSvsbWXWmfUJRNiO7gwfaG0aB9Z9Pa/oNEHLoZ3vMjglxI3Rek7SGansHHbLA3YjjOc3eiCc1L2vV+r4Z4D+LaRYk9xEZQ/wj8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712122397; c=relaxed/simple; bh=he+6NGrhJHI5YonJXCPkU2iB/F89fg/iVTKIZyLwyDs=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=sKsGO5kYuw/Yop+cQOHwJPCWJpGhDi2/BI85rEkOnG/Ck7euPePdeVf8Y2TUV0R6z/AetmHTlFEaM1moWlwPaHBiTAJq3kUaz1fc/3bxg3ql/34oT+r0HndcT//3ta3zfBT/LeHisDePQzwuv3FRqWFJhLZRtLG/XLIT4BNkrFc= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=renesas.com; spf=pass smtp.mailfrom=renesas.com; arc=none smtp.client-ip=210.160.252.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=renesas.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=renesas.com X-IronPort-AV: E=Sophos;i="6.07,176,1708354800"; d="scan'208";a="204148822" Received: from unknown (HELO relmlir5.idc.renesas.com) ([10.200.68.151]) by relmlie6.idc.renesas.com with ESMTP; 03 Apr 2024 14:33:09 +0900 Received: from localhost.localdomain (unknown [10.166.13.99]) by relmlir5.idc.renesas.com (Postfix) with ESMTP id F2E3A40029A6; Wed, 3 Apr 2024 14:33:08 +0900 (JST) From: Yoshihiro Shimoda To: lpieralisi@kernel.org, kw@linux.com, robh@kernel.org, bhelgaas@google.com, krzysztof.kozlowski+dt@linaro.org, conor+dt@kernel.org, jingoohan1@gmail.com, mani@kernel.org Cc: marek.vasut+renesas@gmail.com, linux-pci@vger.kernel.org, devicetree@vger.kernel.org, linux-renesas-soc@vger.kernel.org, Yoshihiro Shimoda Subject: [PATCH v4 3/7] PCI: dwc: Add PCIE_PORT_{FORCE,LANE_SKEW} macros Date: Wed, 3 Apr 2024 14:33:00 +0900 Message-Id: <20240403053304.3695096-4-yoshihiro.shimoda.uh@renesas.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20240403053304.3695096-1-yoshihiro.shimoda.uh@renesas.com> References: <20240403053304.3695096-1-yoshihiro.shimoda.uh@renesas.com> Precedence: bulk X-Mailing-List: linux-renesas-soc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 R-Car Gen4 PCIe controller needs to use the Synopsys-specific PCIe configuration registers. So, add the macros. Signed-off-by: Yoshihiro Shimoda --- drivers/pci/controller/dwc/pcie-designware.h | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/pci/controller/dwc/pcie-designware.h b/drivers/pci/controller/dwc/pcie-designware.h index 26dae4837462..aa4db6eaf02a 100644 --- a/drivers/pci/controller/dwc/pcie-designware.h +++ b/drivers/pci/controller/dwc/pcie-designware.h @@ -71,6 +71,9 @@ #define LINK_WAIT_IATU 9 /* Synopsys-specific PCIe configuration registers */ +#define PCIE_PORT_FORCE 0x708 +#define PORT_FORCE_DO_DESKEW_FOR_SRIS BIT(23) + #define PCIE_PORT_AFR 0x70C #define PORT_AFR_N_FTS_MASK GENMASK(15, 8) #define PORT_AFR_N_FTS(n) FIELD_PREP(PORT_AFR_N_FTS_MASK, n) @@ -92,6 +95,9 @@ #define PORT_LINK_MODE_4_LANES PORT_LINK_MODE(0x7) #define PORT_LINK_MODE_8_LANES PORT_LINK_MODE(0xf) +#define PCIE_PORT_LANE_SKEW 0x714 +#define PORT_LANE_SKEW_INSERT_MASK GENMASK(23, 0) + #define PCIE_PORT_DEBUG0 0x728 #define PORT_LOGIC_LTSSM_STATE_MASK 0x1f #define PORT_LOGIC_LTSSM_STATE_L0 0x11 From patchwork Wed Apr 3 05:33:01 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yoshihiro Shimoda X-Patchwork-Id: 13614961 X-Patchwork-Delegate: geert@linux-m68k.org Received: from relmlie5.idc.renesas.com (relmlor1.renesas.com [210.160.252.171]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 99A6E487B0; Wed, 3 Apr 2024 05:33:13 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=210.160.252.171 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712122395; cv=none; b=J7ZvjvVjy5xMEvZHkWBA+75Lx4gsEVSB9BMt+JL9uxWFtyw5sH8tgMbeQf9Edzz3VIWRr4bt40uUCTVoXT08qgnQA+EAj2tCSvCBUDrBaUPlTG9DFGXcrO0OGjj6ZY66SAs7k/lJzLgVw+nfoYNoRwpmttZtrtAuxdEY4Krgn84= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712122395; c=relaxed/simple; bh=jPSsJpSsdlsFMK7egSiIcG3k6bRSps+Mgikeex15dGI=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=JGFKtarH/1wZl5nmAmnmw6mzsiDnF3cWn8SC/AwnfTaQrkEoEVGT9hE93Y4FSUYs4uU2+r3sq/2AivsOljhrgHzN8mj0foeQ3YXEbBGlWzOL297865T/M71VNFmnA/n8tqFsA43LyC1KXM1Wa1fv5XewxL0ScBHP3PSzNyHNnJM= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=renesas.com; spf=pass smtp.mailfrom=renesas.com; arc=none smtp.client-ip=210.160.252.171 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=renesas.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=renesas.com X-IronPort-AV: E=Sophos;i="6.07,176,1708354800"; d="scan'208";a="200195940" Received: from unknown (HELO relmlir5.idc.renesas.com) ([10.200.68.151]) by relmlie5.idc.renesas.com with ESMTP; 03 Apr 2024 14:33:09 +0900 Received: from localhost.localdomain (unknown [10.166.13.99]) by relmlir5.idc.renesas.com (Postfix) with ESMTP id 243E740029A6; Wed, 3 Apr 2024 14:33:09 +0900 (JST) From: Yoshihiro Shimoda To: lpieralisi@kernel.org, kw@linux.com, robh@kernel.org, bhelgaas@google.com, krzysztof.kozlowski+dt@linaro.org, conor+dt@kernel.org, jingoohan1@gmail.com, mani@kernel.org Cc: marek.vasut+renesas@gmail.com, linux-pci@vger.kernel.org, devicetree@vger.kernel.org, linux-renesas-soc@vger.kernel.org, Yoshihiro Shimoda Subject: [PATCH v4 4/7] PCI: dwc: rcar-gen4: Add rcar_gen4_pcie_platdata Date: Wed, 3 Apr 2024 14:33:01 +0900 Message-Id: <20240403053304.3695096-5-yoshihiro.shimoda.uh@renesas.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20240403053304.3695096-1-yoshihiro.shimoda.uh@renesas.com> References: <20240403053304.3695096-1-yoshihiro.shimoda.uh@renesas.com> Precedence: bulk X-Mailing-List: linux-renesas-soc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 This driver supports r8a779f0 now. In the future, add support for r8a779g0 and r8a779h0. To support these new SoCs, need other initializing settings. So, at first, add rcar_gen4_pcie_platdata and have a member with mode. No behavior changes. Signed-off-by: Yoshihiro Shimoda --- drivers/pci/controller/dwc/pcie-rcar-gen4.c | 30 ++++++++++++++------- 1 file changed, 21 insertions(+), 9 deletions(-) diff --git a/drivers/pci/controller/dwc/pcie-rcar-gen4.c b/drivers/pci/controller/dwc/pcie-rcar-gen4.c index 0be760ed420b..da2821d6efce 100644 --- a/drivers/pci/controller/dwc/pcie-rcar-gen4.c +++ b/drivers/pci/controller/dwc/pcie-rcar-gen4.c @@ -48,11 +48,15 @@ #define RCAR_GEN4_PCIE_EP_FUNC_DBI_OFFSET 0x1000 #define RCAR_GEN4_PCIE_EP_FUNC_DBI2_OFFSET 0x800 +struct rcar_gen4_pcie_platdata { + enum dw_pcie_device_mode mode; +}; + struct rcar_gen4_pcie { struct dw_pcie dw; void __iomem *base; struct platform_device *pdev; - enum dw_pcie_device_mode mode; + const struct rcar_gen4_pcie_platdata *platdata; }; #define to_rcar_gen4_pcie(_dw) container_of(_dw, struct rcar_gen4_pcie, dw) @@ -137,7 +141,7 @@ static int rcar_gen4_pcie_start_link(struct dw_pcie *dw) * Since dw_pcie_setup_rc() sets it once, PCIe Gen2 will be trained. * So, this needs remaining times for up to PCIe Gen4 if RC mode. */ - if (changes && rcar->mode == DW_PCIE_RC_TYPE) + if (changes && rcar->platdata->mode == DW_PCIE_RC_TYPE) changes--; for (i = 0; i < changes; i++) { @@ -172,9 +176,9 @@ static int rcar_gen4_pcie_common_init(struct rcar_gen4_pcie *rcar) reset_control_assert(dw->core_rsts[DW_PCIE_PWR_RST].rstc); val = readl(rcar->base + PCIEMSR0); - if (rcar->mode == DW_PCIE_RC_TYPE) { + if (rcar->platdata->mode == DW_PCIE_RC_TYPE) { val |= DEVICE_TYPE_RC; - } else if (rcar->mode == DW_PCIE_EP_TYPE) { + } else if (rcar->platdata->mode == DW_PCIE_EP_TYPE) { val |= DEVICE_TYPE_EP; } else { ret = -EINVAL; @@ -437,9 +441,9 @@ static void rcar_gen4_remove_dw_pcie_ep(struct rcar_gen4_pcie *rcar) /* Common */ static int rcar_gen4_add_dw_pcie(struct rcar_gen4_pcie *rcar) { - rcar->mode = (uintptr_t)of_device_get_match_data(&rcar->pdev->dev); + rcar->platdata = of_device_get_match_data(&rcar->pdev->dev); - switch (rcar->mode) { + switch (rcar->platdata->mode) { case DW_PCIE_RC_TYPE: return rcar_gen4_add_dw_pcie_rp(rcar); case DW_PCIE_EP_TYPE: @@ -480,7 +484,7 @@ static int rcar_gen4_pcie_probe(struct platform_device *pdev) static void rcar_gen4_remove_dw_pcie(struct rcar_gen4_pcie *rcar) { - switch (rcar->mode) { + switch (rcar->platdata->mode) { case DW_PCIE_RC_TYPE: rcar_gen4_remove_dw_pcie_rp(rcar); break; @@ -500,14 +504,22 @@ static void rcar_gen4_pcie_remove(struct platform_device *pdev) rcar_gen4_pcie_unprepare(rcar); } +static struct rcar_gen4_pcie_platdata platdata_rcar_gen4_pcie = { + .mode = DW_PCIE_RC_TYPE, +}; + +static struct rcar_gen4_pcie_platdata platdata_rcar_gen4_pcie_ep = { + .mode = DW_PCIE_EP_TYPE, +}; + static const struct of_device_id rcar_gen4_pcie_of_match[] = { { .compatible = "renesas,rcar-gen4-pcie", - .data = (void *)DW_PCIE_RC_TYPE, + .data = &platdata_rcar_gen4_pcie, }, { .compatible = "renesas,rcar-gen4-pcie-ep", - .data = (void *)DW_PCIE_EP_TYPE, + .data = &platdata_rcar_gen4_pcie_ep, }, {}, }; From patchwork Wed Apr 3 05:33:02 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yoshihiro Shimoda X-Patchwork-Id: 13614966 X-Patchwork-Delegate: geert@linux-m68k.org Received: from relmlie6.idc.renesas.com (relmlor2.renesas.com [210.160.252.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 25EB84EB5F; 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dmarc=pass (p=none dis=none) header.from=renesas.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=renesas.com X-IronPort-AV: E=Sophos;i="6.07,176,1708354800"; d="scan'208";a="204148825" Received: from unknown (HELO relmlir5.idc.renesas.com) ([10.200.68.151]) by relmlie6.idc.renesas.com with ESMTP; 03 Apr 2024 14:33:09 +0900 Received: from localhost.localdomain (unknown [10.166.13.99]) by relmlir5.idc.renesas.com (Postfix) with ESMTP id 4054B40029A6; Wed, 3 Apr 2024 14:33:09 +0900 (JST) From: Yoshihiro Shimoda To: lpieralisi@kernel.org, kw@linux.com, robh@kernel.org, bhelgaas@google.com, krzysztof.kozlowski+dt@linaro.org, conor+dt@kernel.org, jingoohan1@gmail.com, mani@kernel.org Cc: marek.vasut+renesas@gmail.com, linux-pci@vger.kernel.org, devicetree@vger.kernel.org, linux-renesas-soc@vger.kernel.org, Yoshihiro Shimoda Subject: [PATCH v4 5/7] PCI: dwc: rcar-gen4: Add .ltssm_enable() for other SoC support Date: Wed, 3 Apr 2024 14:33:02 +0900 Message-Id: <20240403053304.3695096-6-yoshihiro.shimoda.uh@renesas.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20240403053304.3695096-1-yoshihiro.shimoda.uh@renesas.com> References: <20240403053304.3695096-1-yoshihiro.shimoda.uh@renesas.com> Precedence: bulk X-Mailing-List: linux-renesas-soc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 This driver can reuse other R-Car Gen4 SoCs support like r8a779g0 and r8a779h0. However, r8a779g0 and r8a779h0 require other initializing settings that differ than r8a779f0. So, add a new function pointer .ltssm_enable() for it. No behavior changes. After applied this patch, probing SoCs by rcar_gen4_pcie_of_match[] will be changed like below: - r8a779f0 as "renesas,r8a779f0-pcie" and "renesas,r8a779f0-pcie-ep" Signed-off-by: Yoshihiro Shimoda --- drivers/pci/controller/dwc/pcie-rcar-gen4.c | 41 ++++++++++++++++++--- 1 file changed, 36 insertions(+), 5 deletions(-) diff --git a/drivers/pci/controller/dwc/pcie-rcar-gen4.c b/drivers/pci/controller/dwc/pcie-rcar-gen4.c index da2821d6efce..e760bcd30c4e 100644 --- a/drivers/pci/controller/dwc/pcie-rcar-gen4.c +++ b/drivers/pci/controller/dwc/pcie-rcar-gen4.c @@ -48,7 +48,9 @@ #define RCAR_GEN4_PCIE_EP_FUNC_DBI_OFFSET 0x1000 #define RCAR_GEN4_PCIE_EP_FUNC_DBI2_OFFSET 0x800 +struct rcar_gen4_pcie; struct rcar_gen4_pcie_platdata { + int (*ltssm_enable)(struct rcar_gen4_pcie *rcar); enum dw_pcie_device_mode mode; }; @@ -61,8 +63,8 @@ struct rcar_gen4_pcie { #define to_rcar_gen4_pcie(_dw) container_of(_dw, struct rcar_gen4_pcie, dw) /* Common */ -static void rcar_gen4_pcie_ltssm_enable(struct rcar_gen4_pcie *rcar, - bool enable) +static void rcar_gen4_pcie_ltssm_control(struct rcar_gen4_pcie *rcar, + bool enable) { u32 val; @@ -127,9 +129,13 @@ static int rcar_gen4_pcie_speed_change(struct dw_pcie *dw) static int rcar_gen4_pcie_start_link(struct dw_pcie *dw) { struct rcar_gen4_pcie *rcar = to_rcar_gen4_pcie(dw); - int i, changes; + int i, changes, ret; - rcar_gen4_pcie_ltssm_enable(rcar, true); + if (rcar->platdata->ltssm_enable) { + ret = rcar->platdata->ltssm_enable(rcar); + if (ret) + return ret; + } /* * Require direct speed change with retrying here if the link_gen is @@ -157,7 +163,7 @@ static void rcar_gen4_pcie_stop_link(struct dw_pcie *dw) { struct rcar_gen4_pcie *rcar = to_rcar_gen4_pcie(dw); - rcar_gen4_pcie_ltssm_enable(rcar, false); + rcar_gen4_pcie_ltssm_control(rcar, false); } static int rcar_gen4_pcie_common_init(struct rcar_gen4_pcie *rcar) @@ -504,6 +510,23 @@ static void rcar_gen4_pcie_remove(struct platform_device *pdev) rcar_gen4_pcie_unprepare(rcar); } +static int r8a779f0_pcie_ltssm_enable(struct rcar_gen4_pcie *rcar) +{ + rcar_gen4_pcie_ltssm_control(rcar, true); + + return 0; +} + +static struct rcar_gen4_pcie_platdata platdata_r8a779f0_pcie = { + .ltssm_enable = r8a779f0_pcie_ltssm_enable, + .mode = DW_PCIE_RC_TYPE, +}; + +static struct rcar_gen4_pcie_platdata platdata_r8a779f0_pcie_ep = { + .ltssm_enable = r8a779f0_pcie_ltssm_enable, + .mode = DW_PCIE_EP_TYPE, +}; + static struct rcar_gen4_pcie_platdata platdata_rcar_gen4_pcie = { .mode = DW_PCIE_RC_TYPE, }; @@ -513,6 +536,14 @@ static struct rcar_gen4_pcie_platdata platdata_rcar_gen4_pcie_ep = { }; static const struct of_device_id rcar_gen4_pcie_of_match[] = { + { + .compatible = "renesas,r8a779f0-pcie", + .data = &platdata_r8a779f0_pcie, + }, + { + .compatible = "renesas,r8a779f04-pcie-ep", + .data = &platdata_r8a779f0_pcie_ep, + }, { .compatible = "renesas,rcar-gen4-pcie", .data = &platdata_rcar_gen4_pcie, From patchwork Wed Apr 3 05:33:03 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yoshihiro Shimoda X-Patchwork-Id: 13614963 X-Patchwork-Delegate: geert@linux-m68k.org Received: from relmlie5.idc.renesas.com (relmlor1.renesas.com [210.160.252.171]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 0980C46425; 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dmarc=pass (p=none dis=none) header.from=renesas.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=renesas.com X-IronPort-AV: E=Sophos;i="6.07,176,1708354800"; d="scan'208";a="200195943" Received: from unknown (HELO relmlir5.idc.renesas.com) ([10.200.68.151]) by relmlie5.idc.renesas.com with ESMTP; 03 Apr 2024 14:33:09 +0900 Received: from localhost.localdomain (unknown [10.166.13.99]) by relmlir5.idc.renesas.com (Postfix) with ESMTP id 5CCD140029A6; Wed, 3 Apr 2024 14:33:09 +0900 (JST) From: Yoshihiro Shimoda To: lpieralisi@kernel.org, kw@linux.com, robh@kernel.org, bhelgaas@google.com, krzysztof.kozlowski+dt@linaro.org, conor+dt@kernel.org, jingoohan1@gmail.com, mani@kernel.org Cc: marek.vasut+renesas@gmail.com, linux-pci@vger.kernel.org, devicetree@vger.kernel.org, linux-renesas-soc@vger.kernel.org, Yoshihiro Shimoda Subject: [PATCH v4 6/7] PCI: dwc: rcar-gen4: Add support for r8a779g0 Date: Wed, 3 Apr 2024 14:33:03 +0900 Message-Id: <20240403053304.3695096-7-yoshihiro.shimoda.uh@renesas.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20240403053304.3695096-1-yoshihiro.shimoda.uh@renesas.com> References: <20240403053304.3695096-1-yoshihiro.shimoda.uh@renesas.com> Precedence: bulk X-Mailing-List: linux-renesas-soc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 This driver previously supported r8a779f0 (R-Car S4-8). Add support for r8a779g0 (R-Car V4H). To support r8a779g0, it requires specific firmware. Signed-off-by: Yoshihiro Shimoda --- drivers/pci/controller/dwc/pcie-rcar-gen4.c | 201 +++++++++++++++++++- 1 file changed, 200 insertions(+), 1 deletion(-) diff --git a/drivers/pci/controller/dwc/pcie-rcar-gen4.c b/drivers/pci/controller/dwc/pcie-rcar-gen4.c index e760bcd30c4e..5d5a088bd2c1 100644 --- a/drivers/pci/controller/dwc/pcie-rcar-gen4.c +++ b/drivers/pci/controller/dwc/pcie-rcar-gen4.c @@ -5,8 +5,10 @@ */ #include +#include #include #include +#include #include #include #include @@ -20,9 +22,10 @@ /* Renesas-specific */ /* PCIe Mode Setting Register 0 */ #define PCIEMSR0 0x0000 -#define BIFUR_MOD_SET_ON BIT(0) +#define APP_SRIS_MODE BIT(6) #define DEVICE_TYPE_EP 0 #define DEVICE_TYPE_RC BIT(4) +#define BIFUR_MOD_SET_ON BIT(0) /* PCIe Interrupt Status 0 */ #define PCIEINTSTS0 0x0084 @@ -37,19 +40,47 @@ #define PCIEDMAINTSTSEN 0x0314 #define PCIEDMAINTSTSEN_INIT GENMASK(15, 0) +/* Port Logic Registers 89 */ +#define PRTLGC89 0x0b70 + +/* Port Logic Registers 90 */ +#define PRTLGC90 0x0b74 + /* PCIe Reset Control Register 1 */ #define PCIERSTCTRL1 0x0014 #define APP_HOLD_PHY_RST BIT(16) #define APP_LTSSM_ENABLE BIT(0) +/* PCIe Power Management Control */ +#define PCIEPWRMNGCTRL 0x0070 +#define APP_CLK_REQ_N BIT(11) +#define APP_CLK_PM_EN BIT(10) + +/* + * The R-Car Gen4 documents don't describe the PHY registers' name. + * But, the initialization procedure describes these offsets. So, + * this driver makes up own #defines for the offsets. + */ +#define RCAR_GEN4_PCIE_PHY_0f8 0x0f8 +#define RCAR_GEN4_PCIE_PHY_148 0x148 +#define RCAR_GEN4_PCIE_PHY_1d4 0x1d4 +#define RCAR_GEN4_PCIE_PHY_514 0x514 +#define RCAR_GEN4_PCIE_PHY_700 0x700 + #define RCAR_NUM_SPEED_CHANGE_RETRIES 10 #define RCAR_MAX_LINK_SPEED 4 #define RCAR_GEN4_PCIE_EP_FUNC_DBI_OFFSET 0x1000 #define RCAR_GEN4_PCIE_EP_FUNC_DBI2_OFFSET 0x800 +#define RCAR_GEN4_PCIE_FIRMWARE_NAME "rcar_gen4_pcie.bin" +#define RCAR_GEN4_PCIE_FIRMWARE_BASE_ADDR 0xc000 + +MODULE_FIRMWARE(RCAR_GEN4_PCIE_FIRMWARE_NAME); + struct rcar_gen4_pcie; struct rcar_gen4_pcie_platdata { + void (*additional_common_init)(struct rcar_gen4_pcie *rcar); int (*ltssm_enable)(struct rcar_gen4_pcie *rcar); enum dw_pcie_device_mode mode; }; @@ -57,12 +88,144 @@ struct rcar_gen4_pcie_platdata { struct rcar_gen4_pcie { struct dw_pcie dw; void __iomem *base; + void __iomem *phy_base; struct platform_device *pdev; const struct rcar_gen4_pcie_platdata *platdata; }; #define to_rcar_gen4_pcie(_dw) container_of(_dw, struct rcar_gen4_pcie, dw) /* Common */ +static void rcar_gen4_pcie_phy_reg_update_bits(struct rcar_gen4_pcie *rcar, + u32 offset, u32 mask, u32 val) +{ + u32 tmp; + + tmp = readl(rcar->phy_base + offset); + tmp &= ~mask; + tmp |= val; + writel(tmp, rcar->phy_base + offset); +} + +static int rcar_gen4_pcie_reg_check_bit(struct rcar_gen4_pcie *rcar, + u32 offset, u32 mask) +{ + struct dw_pcie *dw = &rcar->dw; + + if (dw_pcie_readl_dbi(dw, offset) & mask) + return -EAGAIN; + + return 0; +} + +static int rcar_gen4_pcie_update_phy_firmware(struct rcar_gen4_pcie *rcar) +{ + const u32 check_addr[] = { 0x00101018, 0x00101118, 0x00101021, 0x00101121}; + struct dw_pcie *dw = &rcar->dw; + const struct firmware *fw; + unsigned int i, timeout; + u32 data; + int ret; + + ret = request_firmware(&fw, RCAR_GEN4_PCIE_FIRMWARE_NAME, dw->dev); + if (ret) { + dev_err(dw->dev, "%s: Requesting firmware failed\n", __func__); + return ret; + } + + for (i = 0; i < (fw->size / 2); i++) { + data = fw->data[i * 2] | fw->data[(i * 2) + 1] << 8; + timeout = 100; + do { + dw_pcie_writel_dbi(dw, PRTLGC89, RCAR_GEN4_PCIE_FIRMWARE_BASE_ADDR + i); + dw_pcie_writel_dbi(dw, PRTLGC90, data); + if (rcar_gen4_pcie_reg_check_bit(rcar, PRTLGC89, BIT(30)) >= 0) + break; + if (!(--timeout)) { + ret = -ETIMEDOUT; + goto exit; + } + usleep_range(100, 200); + } while (1); + } + + rcar_gen4_pcie_phy_reg_update_bits(rcar, RCAR_GEN4_PCIE_PHY_0f8, BIT(17), BIT(17)); + + for (i = 0; i < ARRAY_SIZE(check_addr); i++) { + timeout = 100; + do { + dw_pcie_writel_dbi(dw, PRTLGC89, check_addr[i]); + ret = rcar_gen4_pcie_reg_check_bit(rcar, PRTLGC89, BIT(30)); + ret |= rcar_gen4_pcie_reg_check_bit(rcar, PRTLGC90, BIT(0)); + if (ret >= 0) + break; + if (!(--timeout)) { + ret = -ETIMEDOUT; + goto exit; + } + usleep_range(100, 200); + } while (1); + } + + ret = 0; +exit: + release_firmware(fw); + + return ret; +} + +static int rcar_gen4_pcie_enable_phy(struct rcar_gen4_pcie *rcar) +{ + struct dw_pcie *dw = &rcar->dw; + u32 val; + int ret; + + val = dw_pcie_readl_dbi(dw, PCIE_PORT_FORCE); + val |= PORT_FORCE_DO_DESKEW_FOR_SRIS; + dw_pcie_writel_dbi(dw, PCIE_PORT_FORCE, val); + + val = readl(rcar->base + PCIEMSR0); + val |= APP_SRIS_MODE; + writel(val, rcar->base + PCIEMSR0); + + rcar_gen4_pcie_phy_reg_update_bits(rcar, RCAR_GEN4_PCIE_PHY_700, BIT(28), 0); + rcar_gen4_pcie_phy_reg_update_bits(rcar, RCAR_GEN4_PCIE_PHY_700, BIT(20), 0); + rcar_gen4_pcie_phy_reg_update_bits(rcar, RCAR_GEN4_PCIE_PHY_700, BIT(12), 0); + rcar_gen4_pcie_phy_reg_update_bits(rcar, RCAR_GEN4_PCIE_PHY_700, BIT(4), 0); + + rcar_gen4_pcie_phy_reg_update_bits(rcar, RCAR_GEN4_PCIE_PHY_148, + GENMASK(23, 22), BIT(22)); + rcar_gen4_pcie_phy_reg_update_bits(rcar, RCAR_GEN4_PCIE_PHY_148, + GENMASK(18, 16), GENMASK(17, 16)); + rcar_gen4_pcie_phy_reg_update_bits(rcar, RCAR_GEN4_PCIE_PHY_148, + GENMASK(7, 6), BIT(6)); + rcar_gen4_pcie_phy_reg_update_bits(rcar, RCAR_GEN4_PCIE_PHY_148, + GENMASK(2, 0), GENMASK(11, 0)); + rcar_gen4_pcie_phy_reg_update_bits(rcar, RCAR_GEN4_PCIE_PHY_1d4, + GENMASK(16, 15), GENMASK(16, 15)); + rcar_gen4_pcie_phy_reg_update_bits(rcar, RCAR_GEN4_PCIE_PHY_514, BIT(26), BIT(26)); + rcar_gen4_pcie_phy_reg_update_bits(rcar, RCAR_GEN4_PCIE_PHY_0f8, BIT(16), 0); + rcar_gen4_pcie_phy_reg_update_bits(rcar, RCAR_GEN4_PCIE_PHY_0f8, BIT(19), BIT(19)); + + val = readl(rcar->base + PCIERSTCTRL1); + val &= ~APP_HOLD_PHY_RST; + writel(val, rcar->base + PCIERSTCTRL1); + + ret = readl_poll_timeout(rcar->phy_base + RCAR_GEN4_PCIE_PHY_0f8, val, + !(val & BIT(18)), 100, 10000); + if (ret < 0) + return ret; + + ret = rcar_gen4_pcie_update_phy_firmware(rcar); + if (ret) + return ret; + + val = readl(rcar->base + PCIERSTCTRL1); + val |= APP_LTSSM_ENABLE; + writel(val, rcar->base + PCIERSTCTRL1); + + return 0; +} + static void rcar_gen4_pcie_ltssm_control(struct rcar_gen4_pcie *rcar, bool enable) { @@ -200,6 +363,9 @@ static int rcar_gen4_pcie_common_init(struct rcar_gen4_pcie *rcar) if (ret) goto err_unprepare; + if (rcar->platdata->additional_common_init) + rcar->platdata->additional_common_init(rcar); + return 0; err_unprepare: @@ -241,6 +407,10 @@ static void rcar_gen4_pcie_unprepare(struct rcar_gen4_pcie *rcar) static int rcar_gen4_pcie_get_resources(struct rcar_gen4_pcie *rcar) { + rcar->phy_base = devm_platform_ioremap_resource_byname(rcar->pdev, "phy"); + if (IS_ERR(rcar->phy_base)) + return PTR_ERR(rcar->base); + /* Renesas-specific registers */ rcar->base = devm_platform_ioremap_resource_byname(rcar->pdev, "app"); @@ -517,6 +687,31 @@ static int r8a779f0_pcie_ltssm_enable(struct rcar_gen4_pcie *rcar) return 0; } +static void rcar_gen4_pcie_additional_common_init(struct rcar_gen4_pcie *rcar) +{ + struct dw_pcie *dw = &rcar->dw; + u32 val; + + /* + * The SoC manual said the register setting is required. Otherwise, + * linkup failed. + */ + val = dw_pcie_readl_dbi(dw, PCIE_PORT_LANE_SKEW); + val &= ~PORT_LANE_SKEW_INSERT_MASK; + if (dw->num_lanes < 4) + val |= BIT(6); + dw_pcie_writel_dbi(dw, PCIE_PORT_LANE_SKEW, val); + + val = readl(rcar->base + PCIEPWRMNGCTRL); + val |= APP_CLK_REQ_N | APP_CLK_PM_EN; + writel(val, rcar->base + PCIEPWRMNGCTRL); +} + +static int rcar_gen4_pcie_ltssm_enable(struct rcar_gen4_pcie *rcar) +{ + return rcar_gen4_pcie_enable_phy(rcar); +} + static struct rcar_gen4_pcie_platdata platdata_r8a779f0_pcie = { .ltssm_enable = r8a779f0_pcie_ltssm_enable, .mode = DW_PCIE_RC_TYPE, @@ -528,10 +723,14 @@ static struct rcar_gen4_pcie_platdata platdata_r8a779f0_pcie_ep = { }; static struct rcar_gen4_pcie_platdata platdata_rcar_gen4_pcie = { + .additional_common_init = rcar_gen4_pcie_additional_common_init, + .ltssm_enable = rcar_gen4_pcie_ltssm_enable, .mode = DW_PCIE_RC_TYPE, }; static struct rcar_gen4_pcie_platdata platdata_rcar_gen4_pcie_ep = { + .additional_common_init = rcar_gen4_pcie_additional_common_init, + .ltssm_enable = rcar_gen4_pcie_ltssm_enable, .mode = DW_PCIE_EP_TYPE, }; From patchwork Wed Apr 3 05:33:04 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yoshihiro Shimoda X-Patchwork-Id: 13614965 X-Patchwork-Delegate: geert@linux-m68k.org Received: from relmlie5.idc.renesas.com (relmlor1.renesas.com [210.160.252.171]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 0465C4DA08; Wed, 3 Apr 2024 05:33:15 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=210.160.252.171 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712122397; cv=none; b=pWBHuzWVXkyMWbu90VoUbj9HBYxZmini7yj1abNrg3t42TFieHLvY7x7UAzzxNXCg9Bz6F9HqmYuCg7l7W/yVlNDsZBz1G+iqoW2qE/uDvU6JBigbdvIQCcCaU4P/6RMHnzZPGI9KZO7mmXpHPoDu42Odi2XqvhlS7id8emMbsc= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1712122397; c=relaxed/simple; bh=rDGADCXyQhug1jHaaVuWWWUGQXoCuhG2D6lBeCel1wQ=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=oTbX2MFpHm0aw438ncLKIP/rto97Yy1MIKhshZuQ8sQEJlmal3DuHk9c/n0E5YOnxQJncrH0M7y2aZLmFoefAB38zwljpYWG/CJL1xHq+xBIg0wUZIH5wv1jlNH0RfXZIHe3ira9R5kdEpkSyNaA6RU7E3bGYY1mzKfV9jxZBwE= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=renesas.com; spf=pass smtp.mailfrom=renesas.com; arc=none smtp.client-ip=210.160.252.171 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=renesas.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=renesas.com X-IronPort-AV: E=Sophos;i="6.07,176,1708354800"; d="scan'208";a="200195946" Received: from unknown (HELO relmlir5.idc.renesas.com) ([10.200.68.151]) by relmlie5.idc.renesas.com with ESMTP; 03 Apr 2024 14:33:09 +0900 Received: from localhost.localdomain (unknown [10.166.13.99]) by relmlir5.idc.renesas.com (Postfix) with ESMTP id 76740400F302; Wed, 3 Apr 2024 14:33:09 +0900 (JST) From: Yoshihiro Shimoda To: lpieralisi@kernel.org, kw@linux.com, robh@kernel.org, bhelgaas@google.com, krzysztof.kozlowski+dt@linaro.org, conor+dt@kernel.org, jingoohan1@gmail.com, mani@kernel.org Cc: marek.vasut+renesas@gmail.com, linux-pci@vger.kernel.org, devicetree@vger.kernel.org, linux-renesas-soc@vger.kernel.org, Yoshihiro Shimoda , Frank Li Subject: [PATCH v4 7/7] misc: pci_endpoint_test: Document a policy about adding pci_device_id Date: Wed, 3 Apr 2024 14:33:04 +0900 Message-Id: <20240403053304.3695096-8-yoshihiro.shimoda.uh@renesas.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20240403053304.3695096-1-yoshihiro.shimoda.uh@renesas.com> References: <20240403053304.3695096-1-yoshihiro.shimoda.uh@renesas.com> Precedence: bulk X-Mailing-List: linux-renesas-soc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 To avoid becoming struct pci_device_id pci_endpoint_test_tbl longer and longer, document a policy. For example, if PCIe endpoint controller can configure vendor id and/or product id, you can reuse one of existing entries to test. Signed-off-by: Yoshihiro Shimoda --- Cc: Frank Li --- drivers/misc/pci_endpoint_test.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/misc/pci_endpoint_test.c b/drivers/misc/pci_endpoint_test.c index c38a6083f0a7..3c8a0afad91d 100644 --- a/drivers/misc/pci_endpoint_test.c +++ b/drivers/misc/pci_endpoint_test.c @@ -980,6 +980,7 @@ static const struct pci_endpoint_test_data j721e_data = { .irq_type = IRQ_TYPE_MSI, }; +/* Don't need to add a new entry if you can use existing entry to test */ static const struct pci_device_id pci_endpoint_test_tbl[] = { { PCI_DEVICE(PCI_VENDOR_ID_TI, PCI_DEVICE_ID_TI_DRA74x), .driver_data = (kernel_ulong_t)&default_data,