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But boot firmware change the behavor, it is off when boot. So it needs be turn on when it is used. Also it needs be turn off/on when suspend and resume. Add one ref clock for i.MX95 PCIe RC. Increase clocks' maxItems to 5 and keep the same restriction with other compatible string. Signed-off-by: Richard Zhu Reviewed-by: Krzysztof Kozlowski --- .../bindings/pci/fsl,imx6q-pcie-common.yaml | 4 +-- .../bindings/pci/fsl,imx6q-pcie-ep.yaml | 1 + .../bindings/pci/fsl,imx6q-pcie.yaml | 25 ++++++++++++++++--- 3 files changed, 24 insertions(+), 6 deletions(-) diff --git a/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie-common.yaml b/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie-common.yaml index a8b34f58f8f4..cddbe21f99f2 100644 --- a/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie-common.yaml +++ b/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie-common.yaml @@ -17,11 +17,11 @@ description: properties: clocks: minItems: 3 - maxItems: 4 + maxItems: 5 clock-names: minItems: 3 - maxItems: 4 + maxItems: 5 num-lanes: const: 1 diff --git a/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie-ep.yaml b/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie-ep.yaml index 84ca12e8b25b..f41f704c6729 100644 --- a/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie-ep.yaml +++ b/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie-ep.yaml @@ -103,6 +103,7 @@ allOf: properties: clocks: minItems: 4 + maxItems: 4 clock-names: items: - const: pcie diff --git a/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.yaml b/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.yaml index 1e05c560d797..4c76cd3f98a9 100644 --- a/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.yaml +++ b/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.yaml @@ -40,10 +40,11 @@ properties: - description: PCIe PHY clock. - description: Additional required clock entry for imx6sx-pcie, imx6sx-pcie-ep, imx8mq-pcie, imx8mq-pcie-ep. + - description: PCIe reference clock. clock-names: minItems: 3 - maxItems: 4 + maxItems: 5 interrupts: items: @@ -127,7 +128,7 @@ allOf: then: properties: clocks: - minItems: 4 + maxItems: 4 clock-names: items: - const: pcie @@ -140,11 +141,10 @@ allOf: compatible: enum: - fsl,imx8mq-pcie - - fsl,imx95-pcie then: properties: clocks: - minItems: 4 + maxItems: 4 clock-names: items: - const: pcie @@ -200,6 +200,23 @@ allOf: - const: mstr - const: slv + - if: + properties: + compatible: + enum: + - fsl,imx95-pcie + then: + properties: + clocks: + maxItems: 5 + clock-names: + items: + - const: pcie + - const: pcie_bus + - const: pcie_phy + - const: pcie_aux + - const: ref + unevaluatedProperties: false examples: From patchwork Thu Oct 31 08:06:47 2024 Content-Type: text/plain; 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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: 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 X-OriginatorOrg: nxp.com X-MS-Exchange-CrossTenant-Network-Message-Id: b2fd7a23-eb07-4190-c2d0-08dcf9819cf8 X-MS-Exchange-CrossTenant-AuthSource: AS8PR04MB8676.eurprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 31 Oct 2024 07:57:06.2352 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 686ea1d3-bc2b-4c6f-a92c-d99c5c301635 X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: rzMD5tupll80yODrMMz9F4aSzBiIfc877Jv2qOSYatXFi/9sv80cnJoCAZmnJMVbrE53qdkqvrwDhcCTym0SFw== X-MS-Exchange-Transport-CrossTenantHeadersStamped: DB9PR04MB8139 Add "ref" clock to enable reference clock. To avoid the DT compatibility, i.MX95 REF clock might be optional. Replace the devm_clk_bulk_get() by devm_clk_bulk_get_optional() to fetch i.MX95 PCIe clocks in driver. If use external clock, ref clock should point to external reference. If use internal clock, CREF_EN in LAST_TO_REG controls reference output, which implement in drivers/clk/imx/clk-imx95-blk-ctl.c. Signed-off-by: Richard Zhu Reviewed-by: Frank Li --- drivers/pci/controller/dwc/pci-imx6.c | 17 +++++++++++++---- 1 file changed, 13 insertions(+), 4 deletions(-) diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c index 808d1f105417..73cb69ba8933 100644 --- a/drivers/pci/controller/dwc/pci-imx6.c +++ b/drivers/pci/controller/dwc/pci-imx6.c @@ -82,6 +82,7 @@ enum imx_pcie_variants { #define IMX_PCIE_FLAG_HAS_SERDES BIT(6) #define IMX_PCIE_FLAG_SUPPORT_64BIT BIT(7) #define IMX_PCIE_FLAG_CPU_ADDR_FIXUP BIT(8) +#define IMX_PCIE_FLAG_CLOCKS_OPTIONAL BIT(9) #define imx_check_flag(pci, val) (pci->drvdata->flags & val) @@ -1330,7 +1331,12 @@ static int imx_pcie_probe(struct platform_device *pdev) imx_pcie->clks[i].id = imx_pcie->drvdata->clk_names[i]; /* Fetch clocks */ - ret = devm_clk_bulk_get(dev, imx_pcie->drvdata->clks_cnt, imx_pcie->clks); + if (imx_check_flag(imx_pcie, IMX_PCIE_FLAG_CLOCKS_OPTIONAL)) + ret = devm_clk_bulk_get_optional(dev, imx_pcie->drvdata->clks_cnt, + imx_pcie->clks); + else + ret = devm_clk_bulk_get(dev, imx_pcie->drvdata->clks_cnt, + imx_pcie->clks); if (ret) return ret; @@ -1480,6 +1486,8 @@ static const char * const imx8mm_clks[] = {"pcie_bus", "pcie", "pcie_aux"}; static const char * const imx8mq_clks[] = {"pcie_bus", "pcie", "pcie_phy", "pcie_aux"}; static const char * const imx6sx_clks[] = {"pcie_bus", "pcie", "pcie_phy", "pcie_inbound_axi"}; static const char * const imx8q_clks[] = {"mstr", "slv", "dbi"}; +static const char * const imx95_clks[] = {"pcie_bus", "pcie", "pcie_phy", "pcie_aux", "ref"}; +static const char * const imx95_ext_osc_clks[] = {"pcie_bus", "pcie", "pcie_phy", "pcie_aux"}; static const struct imx_pcie_drvdata drvdata[] = { [IMX6Q] = { @@ -1592,9 +1600,10 @@ static const struct imx_pcie_drvdata drvdata[] = { }, [IMX95] = { .variant = IMX95, - .flags = IMX_PCIE_FLAG_HAS_SERDES, - .clk_names = imx8mq_clks, - .clks_cnt = ARRAY_SIZE(imx8mq_clks), + .flags = IMX_PCIE_FLAG_HAS_SERDES | + IMX_PCIE_FLAG_CLOCKS_OPTIONAL, + .clk_names = imx95_clks, + .clks_cnt = ARRAY_SIZE(imx95_clks), .ltssm_off = IMX95_PE0_GEN_CTRL_3, .ltssm_mask = IMX95_PCIE_LTSSM_EN, .mode_off[0] = IMX95_PE0_GEN_CTRL_1, From patchwork Thu Oct 31 08:06:48 2024 Content-Type: text/plain; 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Fetch the dbi2 and iATU base addresses from DT directly, and remove the useless codes. Signed-off-by: Richard Zhu --- drivers/pci/controller/dwc/pci-imx6.c | 20 -------------------- 1 file changed, 20 deletions(-) diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c index 73cb69ba8933..d21f7d2e79dc 100644 --- a/drivers/pci/controller/dwc/pci-imx6.c +++ b/drivers/pci/controller/dwc/pci-imx6.c @@ -1114,7 +1114,6 @@ static int imx_add_pcie_ep(struct imx_pcie *imx_pcie, struct platform_device *pdev) { int ret; - unsigned int pcie_dbi2_offset; struct dw_pcie_ep *ep; struct dw_pcie *pci = imx_pcie->pci; struct dw_pcie_rp *pp = &pci->pp; @@ -1124,25 +1123,6 @@ static int imx_add_pcie_ep(struct imx_pcie *imx_pcie, ep = &pci->ep; ep->ops = &pcie_ep_ops; - switch (imx_pcie->drvdata->variant) { - case IMX8MQ_EP: - case IMX8MM_EP: - case IMX8MP_EP: - pcie_dbi2_offset = SZ_1M; - break; - default: - pcie_dbi2_offset = SZ_4K; - break; - } - - pci->dbi_base2 = pci->dbi_base + pcie_dbi2_offset; - - /* - * FIXME: Ideally, dbi2 base address should come from DT. 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Thu, 31 Oct 2024 07:57:17 +0000 Received: from AS8PR04MB8676.eurprd04.prod.outlook.com ([fe80::28b2:de72:ad25:5d93]) by AS8PR04MB8676.eurprd04.prod.outlook.com ([fe80::28b2:de72:ad25:5d93%6]) with mapi id 15.20.8114.015; Thu, 31 Oct 2024 07:57:17 +0000 From: Richard Zhu To: l.stach@pengutronix.de, bhelgaas@google.com, lpieralisi@kernel.org, kw@linux.com, manivannan.sadhasivam@linaro.org, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, shawnguo@kernel.org, frank.li@nxp.com, s.hauer@pengutronix.de, festevam@gmail.com Cc: imx@lists.linux.dev, kernel@pengutronix.de, linux-pci@vger.kernel.org, linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Richard Zhu , Frank Li Subject: [PATCH v5 04/10] PCI: imx6: Correct controller_id generation logic for i.MX7D Date: Thu, 31 Oct 2024 16:06:49 +0800 Message-Id: <20241031080655.3879139-5-hongxing.zhu@nxp.com> X-Mailer: git-send-email 2.37.1 In-Reply-To: <20241031080655.3879139-1-hongxing.zhu@nxp.com> References: <20241031080655.3879139-1-hongxing.zhu@nxp.com> X-ClientProxiedBy: SG2PR04CA0184.apcprd04.prod.outlook.com (2603:1096:4:14::22) To AS8PR04MB8676.eurprd04.prod.outlook.com (2603:10a6:20b:42b::10) Precedence: bulk X-Mailing-List: linux-pci@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: AS8PR04MB8676:EE_|DB9PR04MB8139:EE_ X-MS-Office365-Filtering-Correlation-Id: d9cfbcf3-d6ec-41b8-f257-08dcf981a3d3 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|7416014|52116014|376014|1800799024|366016|921020|38350700014; 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The previous code is incorrect although yielding the correct result. Fix by removing IMX7D from the switch case branch. Signed-off-by: Richard Zhu Reviewed-by: Frank Li --- drivers/pci/controller/dwc/pci-imx6.c | 1 - 1 file changed, 1 deletion(-) diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c index d21f7d2e79dc..7479d3253f20 100644 --- a/drivers/pci/controller/dwc/pci-imx6.c +++ b/drivers/pci/controller/dwc/pci-imx6.c @@ -1344,7 +1344,6 @@ static int imx_pcie_probe(struct platform_device *pdev) switch (imx_pcie->drvdata->variant) { case IMX8MQ: case IMX8MQ_EP: - case IMX7D: if (dbi_base->start == IMX8MQ_PCIE2_BASE_ADDR) imx_pcie->controller_id = 1; break; From patchwork Thu Oct 31 08:06:50 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Richard Zhu X-Patchwork-Id: 13857672 Received: from EUR02-VI1-obe.outbound.protection.outlook.com (mail-vi1eur02on2069.outbound.protection.outlook.com [40.107.241.69]) (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 B556717B50F; 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Let it be symmetric with imx_pcie_assert_core_reset(). In the commit first introduced apps_reset, apps_reset is asserted in imx6_pcie_assert_core_reset(), but it is de-asserted in another place, in stead of the according symmetric function imx6_pcie_deassert_core_reset(). Use this patch to fix it, and make core reset assertion deasertion symmetric. Fixes: 9b3fe6796d7c ("PCI: imx6: Add code to support i.MX7D") Signed-off-by: Richard Zhu Reviewed-by: Frank Li --- drivers/pci/controller/dwc/pci-imx6.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c index 7479d3253f20..92f2d2536ffc 100644 --- a/drivers/pci/controller/dwc/pci-imx6.c +++ b/drivers/pci/controller/dwc/pci-imx6.c @@ -771,6 +771,7 @@ static void imx_pcie_assert_core_reset(struct imx_pcie *imx_pcie) static int imx_pcie_deassert_core_reset(struct imx_pcie *imx_pcie) { reset_control_deassert(imx_pcie->pciephy_reset); + reset_control_deassert(imx_pcie->apps_reset); if (imx_pcie->drvdata->core_reset) imx_pcie->drvdata->core_reset(imx_pcie, false); From patchwork Thu Oct 31 08:06:51 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Richard Zhu X-Patchwork-Id: 13857680 Received: from EUR02-VI1-obe.outbound.protection.outlook.com (mail-vi1eur02on2047.outbound.protection.outlook.com [40.107.241.47]) (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 BA037186615; 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Fixes: d0a75c791f98 ("PCI: imx6: Factor out ref clock disable to match enable") Signed-off-by: Richard Zhu Reviewed-by: Frank Li --- drivers/pci/controller/dwc/pci-imx6.c | 24 ++++++++++++------------ 1 file changed, 12 insertions(+), 12 deletions(-) diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c index 92f2d2536ffc..e696dc9381cd 100644 --- a/drivers/pci/controller/dwc/pci-imx6.c +++ b/drivers/pci/controller/dwc/pci-imx6.c @@ -594,10 +594,9 @@ static int imx_pcie_attach_pd(struct device *dev) static int imx6sx_pcie_enable_ref_clk(struct imx_pcie *imx_pcie, bool enable) { - if (enable) - regmap_clear_bits(imx_pcie->iomuxc_gpr, IOMUXC_GPR12, - IMX6SX_GPR12_PCIE_TEST_POWERDOWN); - + regmap_update_bits(imx_pcie->iomuxc_gpr, IOMUXC_GPR12, + IMX6SX_GPR12_PCIE_TEST_POWERDOWN, + enable ? 0 : IMX6SX_GPR12_PCIE_TEST_POWERDOWN); return 0; } @@ -626,19 +625,20 @@ static int imx8mm_pcie_enable_ref_clk(struct imx_pcie *imx_pcie, bool enable) { int offset = imx_pcie_grp_offset(imx_pcie); - if (enable) { - regmap_clear_bits(imx_pcie->iomuxc_gpr, offset, IMX8MQ_GPR_PCIE_CLK_REQ_OVERRIDE); - regmap_set_bits(imx_pcie->iomuxc_gpr, offset, IMX8MQ_GPR_PCIE_CLK_REQ_OVERRIDE_EN); - } - + regmap_update_bits(imx_pcie->iomuxc_gpr, offset, + IMX8MQ_GPR_PCIE_CLK_REQ_OVERRIDE, + enable ? 0 : IMX8MQ_GPR_PCIE_CLK_REQ_OVERRIDE); + regmap_update_bits(imx_pcie->iomuxc_gpr, offset, + IMX8MQ_GPR_PCIE_CLK_REQ_OVERRIDE_EN, + enable ? IMX8MQ_GPR_PCIE_CLK_REQ_OVERRIDE_EN : 0); return 0; } static int imx7d_pcie_enable_ref_clk(struct imx_pcie *imx_pcie, bool enable) { - if (!enable) - regmap_set_bits(imx_pcie->iomuxc_gpr, IOMUXC_GPR12, - IMX7D_GPR12_PCIE_PHY_REFCLK_SEL); + regmap_update_bits(imx_pcie->iomuxc_gpr, IOMUXC_GPR12, + IMX7D_GPR12_PCIE_PHY_REFCLK_SEL, + enable ? 0 : IMX7D_GPR12_PCIE_PHY_REFCLK_SEL); return 0; } From patchwork Thu Oct 31 08:06:52 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Richard Zhu X-Patchwork-Id: 13857681 Received: from EUR02-AM0-obe.outbound.protection.outlook.com (mail-am0eur02on2059.outbound.protection.outlook.com [40.107.247.59]) (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 3E1A5189B8E; Thu, 31 Oct 2024 07:57:37 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=fail smtp.client-ip=40.107.247.59 ARC-Seal: i=2; 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Thu, 31 Oct 2024 07:57:35 +0000 Received: from AS8PR04MB8676.eurprd04.prod.outlook.com ([fe80::28b2:de72:ad25:5d93]) by AS8PR04MB8676.eurprd04.prod.outlook.com ([fe80::28b2:de72:ad25:5d93%6]) with mapi id 15.20.8114.015; Thu, 31 Oct 2024 07:57:35 +0000 From: Richard Zhu To: l.stach@pengutronix.de, bhelgaas@google.com, lpieralisi@kernel.org, kw@linux.com, manivannan.sadhasivam@linaro.org, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, shawnguo@kernel.org, frank.li@nxp.com, s.hauer@pengutronix.de, festevam@gmail.com Cc: imx@lists.linux.dev, kernel@pengutronix.de, linux-pci@vger.kernel.org, linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Richard Zhu , Frank Li Subject: [PATCH v5 07/10] PCI: imx6: Clean up codes by removing imx7d_pcie_init_phy() Date: Thu, 31 Oct 2024 16:06:52 +0800 Message-Id: <20241031080655.3879139-8-hongxing.zhu@nxp.com> X-Mailer: git-send-email 2.37.1 In-Reply-To: <20241031080655.3879139-1-hongxing.zhu@nxp.com> References: <20241031080655.3879139-1-hongxing.zhu@nxp.com> X-ClientProxiedBy: SG2PR04CA0184.apcprd04.prod.outlook.com (2603:1096:4:14::22) To AS8PR04MB8676.eurprd04.prod.outlook.com (2603:10a6:20b:42b::10) Precedence: bulk X-Mailing-List: linux-pci@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: AS8PR04MB8676:EE_|DB9PR04MB8139:EE_ X-MS-Office365-Filtering-Correlation-Id: fdaf70c6-5e1f-46a5-df24-08dcf981ae68 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|7416014|52116014|376014|1800799024|366016|921020|38350700014; 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Signed-off-by: Richard Zhu Reviewed-by: Frank Li --- drivers/pci/controller/dwc/pci-imx6.c | 8 -------- 1 file changed, 8 deletions(-) diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c index e696dc9381cd..dbcf22e440e2 100644 --- a/drivers/pci/controller/dwc/pci-imx6.c +++ b/drivers/pci/controller/dwc/pci-imx6.c @@ -389,13 +389,6 @@ static int imx8mq_pcie_init_phy(struct imx_pcie *imx_pcie) return 0; } -static int imx7d_pcie_init_phy(struct imx_pcie *imx_pcie) -{ - regmap_update_bits(imx_pcie->iomuxc_gpr, IOMUXC_GPR12, IMX7D_GPR12_PCIE_PHY_REFCLK_SEL, 0); - - return 0; -} - static int imx_pcie_init_phy(struct imx_pcie *imx_pcie) { regmap_update_bits(imx_pcie->iomuxc_gpr, IOMUXC_GPR12, @@ -1529,7 +1522,6 @@ static const struct imx_pcie_drvdata drvdata[] = { .clks_cnt = ARRAY_SIZE(imx6q_clks), .mode_off[0] = IOMUXC_GPR12, .mode_mask[0] = IMX6Q_GPR12_DEVICE_TYPE, - .init_phy = imx7d_pcie_init_phy, .enable_ref_clk = imx7d_pcie_enable_ref_clk, .core_reset = imx7d_pcie_core_reset, }, From patchwork Thu Oct 31 08:06:53 2024 Content-Type: text/plain; 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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: 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 X-OriginatorOrg: nxp.com X-MS-Exchange-CrossTenant-Network-Message-Id: dcf341c7-0648-4fbb-e6c4-08dcf981b205 X-MS-Exchange-CrossTenant-AuthSource: AS8PR04MB8676.eurprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 31 Oct 2024 07:57:41.4990 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 686ea1d3-bc2b-4c6f-a92c-d99c5c301635 X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: DtXLmAZzonssS/YwtKdLvTnNnY4TQ2ZdLIP+p2aWjyrIqzDgXl1uVJ+B4/7zjTgCHk9hxHEnbP+LQC7FAE4CVg== X-MS-Exchange-Transport-CrossTenantHeadersStamped: DB9PR04MB8139 From: Frank Li Call common dwc suspend/resume function. Use dwc common iATU method to send out PME_TURN_OFF message. In Old DWC implementations, PCIE_ATU_INHIBIT_PAYLOAD bit in iATU Ctrl2 register is reserved. So the generic DWC implementation of sending the PME_Turn_Off message using a dummy MMIO write cannot be used. Use previouse method to kick off PME_TURN_OFF MSG for these platforms. Replace the imx_pcie_stop_link() and imx_pcie_host_exit() by dw_pcie_suspend_noirq() in imx_pcie_suspend_noirq(). dw_pcie_suspend_noirq() dw_pcie_stop_link(); pci->pp.ops->deinit(); imx_pcie_host_exit(); Replace the imx_pcie_host_init(), dw_pcie_setup_rc() and imx_pcie_start_link() by dw_pcie_resume_noirq() in imx_pcie_resume_noirq(). dw_pcie_resume_noirq() pci->pp.ops->init(); imx_pcie_host_init(); dw_pcie_setup_rc(); dw_pcie_start_link(); imx_pcie_start_link(); Signed-off-by: Frank Li Signed-off-by: Richard Zhu --- drivers/pci/controller/dwc/pci-imx6.c | 96 ++++++++++----------------- 1 file changed, 35 insertions(+), 61 deletions(-) diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c index dbcf22e440e2..410a31e5f82a 100644 --- a/drivers/pci/controller/dwc/pci-imx6.c +++ b/drivers/pci/controller/dwc/pci-imx6.c @@ -33,6 +33,7 @@ #include #include +#include "../../pci.h" #include "pcie-designware.h" #define IMX8MQ_GPR_PCIE_REF_USE_PAD BIT(9) @@ -83,6 +84,7 @@ enum imx_pcie_variants { #define IMX_PCIE_FLAG_SUPPORT_64BIT BIT(7) #define IMX_PCIE_FLAG_CPU_ADDR_FIXUP BIT(8) #define IMX_PCIE_FLAG_CLOCKS_OPTIONAL BIT(9) +#define IMX_PCIE_FLAG_CUSTOM_PME_TURNOFF BIT(10) #define imx_check_flag(pci, val) (pci->drvdata->flags & val) @@ -107,19 +109,18 @@ struct imx_pcie_drvdata { int (*init_phy)(struct imx_pcie *pcie); int (*enable_ref_clk)(struct imx_pcie *pcie, bool enable); int (*core_reset)(struct imx_pcie *pcie, bool assert); + const struct dw_pcie_host_ops *ops; }; struct imx_pcie { struct dw_pcie *pci; struct gpio_desc *reset_gpiod; - bool link_is_up; struct clk_bulk_data clks[IMX_PCIE_MAX_CLKS]; struct regmap *iomuxc_gpr; u16 msi_ctrl; u32 controller_id; struct reset_control *pciephy_reset; struct reset_control *apps_reset; - struct reset_control *turnoff_reset; u32 tx_deemph_gen1; u32 tx_deemph_gen2_3p5db; u32 tx_deemph_gen2_6db; @@ -898,13 +899,11 @@ static int imx_pcie_start_link(struct dw_pcie *pci) dev_info(dev, "Link: Only Gen1 is enabled\n"); } - imx_pcie->link_is_up = true; tmp = dw_pcie_readw_dbi(pci, offset + PCI_EXP_LNKSTA); dev_info(dev, "Link up, Gen%i\n", tmp & PCI_EXP_LNKSTA_CLS); return 0; err_reset_phy: - imx_pcie->link_is_up = false; dev_dbg(dev, "PHY DEBUG_R0=0x%08x DEBUG_R1=0x%08x\n", dw_pcie_readl_dbi(pci, PCIE_PORT_DEBUG0), dw_pcie_readl_dbi(pci, PCIE_PORT_DEBUG1)); @@ -1023,9 +1022,32 @@ static u64 imx_pcie_cpu_addr_fixup(struct dw_pcie *pcie, u64 cpu_addr) return cpu_addr - entry->offset; } +/* + * In Old DWC implementations, PCIE_ATU_INHIBIT_PAYLOAD bit in iATU Ctrl2 + * register is reserved. So the generic DWC implementation of sending the + * PME_Turn_Off message using a dummy MMIO write cannot be used. + */ +static void imx_pcie_pme_turn_off(struct dw_pcie_rp *pp) +{ + struct dw_pcie *pci = to_dw_pcie_from_pp(pp); + struct imx_pcie *imx_pcie = to_imx_pcie(pci); + + regmap_set_bits(imx_pcie->iomuxc_gpr, IOMUXC_GPR12, IMX6SX_GPR12_PCIE_PM_TURN_OFF); + regmap_clear_bits(imx_pcie->iomuxc_gpr, IOMUXC_GPR12, IMX6SX_GPR12_PCIE_PM_TURN_OFF); + + usleep_range(PCIE_PME_TO_L2_TIMEOUT_US/10, PCIE_PME_TO_L2_TIMEOUT_US); +} + + static const struct dw_pcie_host_ops imx_pcie_host_ops = { .init = imx_pcie_host_init, .deinit = imx_pcie_host_exit, + .pme_turn_off = imx_pcie_pme_turn_off, +}; + +static const struct dw_pcie_host_ops imx_pcie_host_dw_pme_ops = { + .init = imx_pcie_host_init, + .deinit = imx_pcie_host_exit, }; static const struct dw_pcie_ops dw_pcie_ops = { @@ -1146,43 +1168,6 @@ static int imx_add_pcie_ep(struct imx_pcie *imx_pcie, return 0; } -static void imx_pcie_pm_turnoff(struct imx_pcie *imx_pcie) -{ - struct device *dev = imx_pcie->pci->dev; - - /* Some variants have a turnoff reset in DT */ - if (imx_pcie->turnoff_reset) { - reset_control_assert(imx_pcie->turnoff_reset); - reset_control_deassert(imx_pcie->turnoff_reset); - goto pm_turnoff_sleep; - } - - /* Others poke directly at IOMUXC registers */ - switch (imx_pcie->drvdata->variant) { - case IMX6SX: - case IMX6QP: - regmap_update_bits(imx_pcie->iomuxc_gpr, IOMUXC_GPR12, - IMX6SX_GPR12_PCIE_PM_TURN_OFF, - IMX6SX_GPR12_PCIE_PM_TURN_OFF); - regmap_update_bits(imx_pcie->iomuxc_gpr, IOMUXC_GPR12, - IMX6SX_GPR12_PCIE_PM_TURN_OFF, 0); - break; - default: - dev_err(dev, "PME_Turn_Off not implemented\n"); - return; - } - - /* - * Components with an upstream port must respond to - * PME_Turn_Off with PME_TO_Ack but we can't check. - * - * The standard recommends a 1-10ms timeout after which to - * proceed anyway as if acks were received. - */ -pm_turnoff_sleep: - usleep_range(1000, 10000); -} - static void imx_pcie_msi_save_restore(struct imx_pcie *imx_pcie, bool save) { u8 offset; @@ -1206,36 +1191,26 @@ static void imx_pcie_msi_save_restore(struct imx_pcie *imx_pcie, bool save) static int imx_pcie_suspend_noirq(struct device *dev) { struct imx_pcie *imx_pcie = dev_get_drvdata(dev); - struct dw_pcie_rp *pp = &imx_pcie->pci->pp; if (!(imx_pcie->drvdata->flags & IMX_PCIE_FLAG_SUPPORTS_SUSPEND)) return 0; imx_pcie_msi_save_restore(imx_pcie, true); - imx_pcie_pm_turnoff(imx_pcie); - imx_pcie_stop_link(imx_pcie->pci); - imx_pcie_host_exit(pp); - - return 0; + return dw_pcie_suspend_noirq(imx_pcie->pci); } static int imx_pcie_resume_noirq(struct device *dev) { int ret; struct imx_pcie *imx_pcie = dev_get_drvdata(dev); - struct dw_pcie_rp *pp = &imx_pcie->pci->pp; if (!(imx_pcie->drvdata->flags & IMX_PCIE_FLAG_SUPPORTS_SUSPEND)) return 0; - ret = imx_pcie_host_init(pp); + ret = dw_pcie_resume_noirq(imx_pcie->pci); if (ret) return ret; imx_pcie_msi_save_restore(imx_pcie, false); - dw_pcie_setup_rc(pp); - - if (imx_pcie->link_is_up) - imx_pcie_start_link(imx_pcie->pci); return 0; } @@ -1267,11 +1242,14 @@ static int imx_pcie_probe(struct platform_device *pdev) pci->dev = dev; pci->ops = &dw_pcie_ops; - pci->pp.ops = &imx_pcie_host_ops; imx_pcie->pci = pci; imx_pcie->drvdata = of_device_get_match_data(dev); + pci->pp.ops = &imx_pcie_host_dw_pme_ops; + if (imx_pcie->drvdata->ops) + pci->pp.ops = imx_pcie->drvdata->ops; + /* Find the PHY if one is defined, only imx7d uses it */ np = of_parse_phandle(node, "fsl,imx7d-pcie-phy", 0); if (np) { @@ -1345,13 +1323,6 @@ static int imx_pcie_probe(struct platform_device *pdev) break; } - /* Grab turnoff reset */ - imx_pcie->turnoff_reset = devm_reset_control_get_optional_exclusive(dev, "turnoff"); - if (IS_ERR(imx_pcie->turnoff_reset)) { - dev_err(dev, "Failed to get TURNOFF reset control\n"); - return PTR_ERR(imx_pcie->turnoff_reset); - } - if (imx_pcie->drvdata->gpr) { /* Grab GPR config register range */ imx_pcie->iomuxc_gpr = @@ -1430,6 +1401,7 @@ static int imx_pcie_probe(struct platform_device *pdev) if (ret < 0) return ret; } else { + pci->pp.use_atu_msg = true; ret = dw_pcie_host_init(&pci->pp); if (ret < 0) return ret; @@ -1494,6 +1466,7 @@ static const struct imx_pcie_drvdata drvdata[] = { .init_phy = imx6sx_pcie_init_phy, .enable_ref_clk = imx6sx_pcie_enable_ref_clk, .core_reset = imx6sx_pcie_core_reset, + .ops = &imx_pcie_host_ops, }, [IMX6QP] = { .variant = IMX6QP, @@ -1511,6 +1484,7 @@ static const struct imx_pcie_drvdata drvdata[] = { .init_phy = imx_pcie_init_phy, .enable_ref_clk = imx6q_pcie_enable_ref_clk, .core_reset = imx6qp_pcie_core_reset, + .ops = &imx_pcie_host_ops, }, [IMX7D] = { .variant = IMX7D, From patchwork Thu Oct 31 08:06:54 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Richard Zhu X-Patchwork-Id: 13857683 Received: from EUR02-DB5-obe.outbound.protection.outlook.com (mail-db5eur02on2068.outbound.protection.outlook.com [40.107.249.68]) (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 9E86F155A43; 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Signed-off-by: Richard Zhu Reviewed-by: Frank Li --- drivers/pci/controller/dwc/pci-imx6.c | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c index 410a31e5f82a..f662fbb45626 100644 --- a/drivers/pci/controller/dwc/pci-imx6.c +++ b/drivers/pci/controller/dwc/pci-imx6.c @@ -1502,7 +1502,8 @@ static const struct imx_pcie_drvdata drvdata[] = { [IMX8MQ] = { .variant = IMX8MQ, .flags = IMX_PCIE_FLAG_HAS_APP_RESET | - IMX_PCIE_FLAG_HAS_PHY_RESET, + IMX_PCIE_FLAG_HAS_PHY_RESET | + IMX_PCIE_FLAG_SUPPORTS_SUSPEND, .gpr = "fsl,imx8mq-iomuxc-gpr", .clk_names = imx8mq_clks, .clks_cnt = ARRAY_SIZE(imx8mq_clks), @@ -1540,14 +1541,16 @@ static const struct imx_pcie_drvdata drvdata[] = { [IMX8Q] = { .variant = IMX8Q, .flags = IMX_PCIE_FLAG_HAS_PHYDRV | - IMX_PCIE_FLAG_CPU_ADDR_FIXUP, + IMX_PCIE_FLAG_CPU_ADDR_FIXUP | + IMX_PCIE_FLAG_SUPPORTS_SUSPEND, .clk_names = imx8q_clks, .clks_cnt = ARRAY_SIZE(imx8q_clks), }, [IMX95] = { .variant = IMX95, .flags = IMX_PCIE_FLAG_HAS_SERDES | - IMX_PCIE_FLAG_CLOCKS_OPTIONAL, + IMX_PCIE_FLAG_CLOCKS_OPTIONAL | + IMX_PCIE_FLAG_SUPPORTS_SUSPEND, .clk_names = imx95_clks, .clks_cnt = ARRAY_SIZE(imx95_clks), .ltssm_off = IMX95_PE0_GEN_CTRL_3, From patchwork Thu Oct 31 08:06:55 2024 Content-Type: text/plain; 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Signed-off-by: Richard Zhu Reviewed-by: Frank Li --- arch/arm64/boot/dts/freescale/imx95.dtsi | 18 ++++++++++++++---- 1 file changed, 14 insertions(+), 4 deletions(-) diff --git a/arch/arm64/boot/dts/freescale/imx95.dtsi b/arch/arm64/boot/dts/freescale/imx95.dtsi index 03661e76550f..5cb504b5f851 100644 --- a/arch/arm64/boot/dts/freescale/imx95.dtsi +++ b/arch/arm64/boot/dts/freescale/imx95.dtsi @@ -1473,6 +1473,14 @@ smmu: iommu@490d0000 { }; }; + hsio_blk_ctl: syscon@4c0100c0 { + compatible = "nxp,imx95-hsio-blk-ctl", "syscon"; + reg = <0x0 0x4c0100c0 0x0 0x4>; + #clock-cells = <1>; + clocks = <&dummy>; + power-domains = <&scmi_devpd IMX95_PD_HSIO_TOP>; + }; + pcie0: pcie@4c300000 { compatible = "fsl,imx95-pcie"; reg = <0 0x4c300000 0 0x10000>, @@ -1500,8 +1508,9 @@ pcie0: pcie@4c300000 { clocks = <&scmi_clk IMX95_CLK_HSIO>, <&scmi_clk IMX95_CLK_HSIOPLL>, <&scmi_clk IMX95_CLK_HSIOPLL_VCO>, - <&scmi_clk IMX95_CLK_HSIOPCIEAUX>; - clock-names = "pcie", "pcie_bus", "pcie_phy", "pcie_aux"; + <&scmi_clk IMX95_CLK_HSIOPCIEAUX>, + <&hsio_blk_ctl 0>; + clock-names = "pcie", "pcie_bus", "pcie_phy", "pcie_aux", "ref"; assigned-clocks =<&scmi_clk IMX95_CLK_HSIOPLL_VCO>, <&scmi_clk IMX95_CLK_HSIOPLL>, <&scmi_clk IMX95_CLK_HSIOPCIEAUX>; @@ -1528,8 +1537,9 @@ pcie0_ep: pcie-ep@4c300000 { clocks = <&scmi_clk IMX95_CLK_HSIO>, <&scmi_clk IMX95_CLK_HSIOPLL>, <&scmi_clk IMX95_CLK_HSIOPLL_VCO>, - <&scmi_clk IMX95_CLK_HSIOPCIEAUX>; - clock-names = "pcie", "pcie_bus", "pcie_phy", "pcie_aux"; + <&scmi_clk IMX95_CLK_HSIOPCIEAUX>, + <&hsio_blk_ctl 0>; + clock-names = "pcie", "pcie_bus", "pcie_phy", "pcie_aux", "ref"; assigned-clocks =<&scmi_clk IMX95_CLK_HSIOPLL_VCO>, <&scmi_clk IMX95_CLK_HSIOPLL>, <&scmi_clk IMX95_CLK_HSIOPCIEAUX>;