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Wed, 17 Jan 2024 12:25:33 -0800 From: Petlozu Pravareshwar To: , , , , , , , , , , , , , CC: Subject: [PATCH V2 1/3] soc/tegra: pmc: Update address mapping sequence for PMC apertures Date: Wed, 17 Jan 2024 20:25:02 +0000 Message-ID: <20240117202504.943476-1-petlozup@nvidia.com> X-Mailer: git-send-email 2.25.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-NVConfidentiality: public X-NV-OnPremToCloud: ExternallySecured X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BL02EPF0001A0FE:EE_|IA0PR12MB8745:EE_ X-MS-Office365-Filtering-Correlation-Id: fec80020-a929-40f5-1d81-08dc179a82d4 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:216.228.118.233;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:mail.nvidia.com;PTR:dc7edge2.nvidia.com;CAT:NONE;SFS:(13230031)(4636009)(346002)(39860400002)(396003)(376002)(136003)(230922051799003)(451199024)(1800799012)(186009)(64100799003)(82310400011)(40470700004)(46966006)(36840700001)(83380400001)(47076005)(1076003)(107886003)(26005)(426003)(336012)(2616005)(82740400003)(36860700001)(8676002)(4326008)(8936002)(478600001)(2906002)(41300700001)(7416002)(110136005)(6666004)(70586007)(70206006)(5660300002)(316002)(921011)(356005)(7636003)(86362001)(36756003)(40460700003)(40480700001);DIR:OUT;SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 17 Jan 2024 20:25:56.5234 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: fec80020-a929-40f5-1d81-08dc179a82d4 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.118.233];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: BL02EPF0001A0FE.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: IA0PR12MB8745 X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1788370744924355916 X-GMAIL-MSGID: 1788370744924355916 On Tegra SoCs prior to Tegra186, PMC has single address range only. Starting from and after Tegra186, PMC has additional address ranges apart from base address range. Currently in PMC driver, we try to map these additional address ranges on all SoCs and if we fail then we assume that the range is not valid for an SoC. This change makes it more explicit on which address ranges are expected to be present on which SoCs and maps the additional address ranges only on SoCs from and after Tegra186. Signed-off-by: Petlozu Pravareshwar --- drivers/soc/tegra/pmc.c | 34 ++++++++++++++++++++-------------- 1 file changed, 20 insertions(+), 14 deletions(-) diff --git a/drivers/soc/tegra/pmc.c b/drivers/soc/tegra/pmc.c index 6dfcc7f50ece..0bc983f6b088 100644 --- a/drivers/soc/tegra/pmc.c +++ b/drivers/soc/tegra/pmc.c @@ -384,6 +384,7 @@ struct tegra_pmc_soc { bool has_blink_output; bool has_usb_sleepwalk; bool supports_core_domain; + bool has_single_mmio_aperture; }; /** @@ -2885,31 +2886,28 @@ static int tegra_pmc_probe(struct platform_device *pdev) if (IS_ERR(base)) return PTR_ERR(base); - res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "wake"); - if (res) { + if (pmc->soc->has_single_mmio_aperture) { + pmc->wake = base; + pmc->aotag = base; + pmc->scratch = base; + } else { + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, + "wake"); pmc->wake = devm_ioremap_resource(&pdev->dev, res); if (IS_ERR(pmc->wake)) return PTR_ERR(pmc->wake); - } else { - pmc->wake = base; - } - res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "aotag"); - if (res) { + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, + "aotag"); pmc->aotag = devm_ioremap_resource(&pdev->dev, res); if (IS_ERR(pmc->aotag)) return PTR_ERR(pmc->aotag); - } else { - pmc->aotag = base; - } - res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "scratch"); - if (res) { + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, + "scratch"); pmc->scratch = devm_ioremap_resource(&pdev->dev, res); if (IS_ERR(pmc->scratch)) return PTR_ERR(pmc->scratch); - } else { - pmc->scratch = base; } pmc->clk = devm_clk_get_optional(&pdev->dev, "pclk"); @@ -3300,6 +3298,7 @@ static const struct tegra_pmc_soc tegra20_pmc_soc = { .num_pmc_clks = 0, .has_blink_output = true, .has_usb_sleepwalk = true, + .has_single_mmio_aperture = true, }; static const char * const tegra30_powergates[] = { @@ -3361,6 +3360,7 @@ static const struct tegra_pmc_soc tegra30_pmc_soc = { .num_pmc_clks = ARRAY_SIZE(tegra_pmc_clks_data), .has_blink_output = true, .has_usb_sleepwalk = true, + .has_single_mmio_aperture = true, }; static const char * const tegra114_powergates[] = { @@ -3418,6 +3418,7 @@ static const struct tegra_pmc_soc tegra114_pmc_soc = { .num_pmc_clks = ARRAY_SIZE(tegra_pmc_clks_data), .has_blink_output = true, .has_usb_sleepwalk = true, + .has_single_mmio_aperture = true, }; static const char * const tegra124_powergates[] = { @@ -3562,6 +3563,7 @@ static const struct tegra_pmc_soc tegra124_pmc_soc = { .num_pmc_clks = ARRAY_SIZE(tegra_pmc_clks_data), .has_blink_output = true, .has_usb_sleepwalk = true, + .has_single_mmio_aperture = true, }; static const char * const tegra210_powergates[] = { @@ -3725,6 +3727,7 @@ static const struct tegra_pmc_soc tegra210_pmc_soc = { .num_pmc_clks = ARRAY_SIZE(tegra_pmc_clks_data), .has_blink_output = true, .has_usb_sleepwalk = true, + .has_single_mmio_aperture = true, }; static const struct tegra_io_pad_soc tegra186_io_pads[] = { @@ -3922,6 +3925,7 @@ static const struct tegra_pmc_soc tegra186_pmc_soc = { .num_pmc_clks = 0, .has_blink_output = false, .has_usb_sleepwalk = false, + .has_single_mmio_aperture = false, }; static const struct tegra_io_pad_soc tegra194_io_pads[] = { @@ -4107,6 +4111,7 @@ static const struct tegra_pmc_soc tegra194_pmc_soc = { .num_pmc_clks = 0, .has_blink_output = false, .has_usb_sleepwalk = false, + .has_single_mmio_aperture = false, }; static const struct tegra_io_pad_soc tegra234_io_pads[] = { @@ -4235,6 +4240,7 @@ static const struct tegra_pmc_soc tegra234_pmc_soc = { .pmc_clks_data = NULL, .num_pmc_clks = 0, .has_blink_output = false, + .has_single_mmio_aperture = false, }; static const struct of_device_id tegra_pmc_match[] = { From patchwork Wed Jan 17 20:25:03 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Petlozu Pravareshwar X-Patchwork-Id: 188939 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a05:7301:30f:b0:101:a8e8:374 with SMTP id ia15csp167724dyb; Wed, 17 Jan 2024 12:27:43 -0800 (PST) X-Google-Smtp-Source: AGHT+IFh6dnw7hrw1R6EUL6R4RUBunrXBBeM4sujSRndo8ahx0tjKANL6inixbHT6LgLYtErtmNr X-Received: by 2002:a05:6a00:4650:b0:6d9:be3e:19a0 with SMTP id kp16-20020a056a00465000b006d9be3e19a0mr11570834pfb.48.1705523263500; Wed, 17 Jan 2024 12:27:43 -0800 (PST) Received: from sv.mirrors.kernel.org (sv.mirrors.kernel.org. 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Wed, 17 Jan 2024 12:25:48 -0800 From: Petlozu Pravareshwar To: , , , , , , , , , , , , , CC: Subject: [PATCH V2 2/3] dt-bindings: tegra: pmc: Update scratch as an optional aperture Date: Wed, 17 Jan 2024 20:25:03 +0000 Message-ID: <20240117202504.943476-2-petlozup@nvidia.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20240117202504.943476-1-petlozup@nvidia.com> References: <20240117202504.943476-1-petlozup@nvidia.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-NVConfidentiality: public X-NV-OnPremToCloud: ExternallySecured X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CY4PEPF0000E9D3:EE_|BN9PR12MB5368:EE_ X-MS-Office365-Filtering-Correlation-Id: 1fea15eb-417c-409b-7798-08dc179a8287 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:216.228.118.232;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:mail.nvidia.com;PTR:dc7edge1.nvidia.com;CAT:NONE;SFS:(13230031)(4636009)(376002)(396003)(136003)(39860400002)(346002)(230173577357003)(230273577357003)(230922051799003)(64100799003)(186009)(451199024)(82310400011)(1800799012)(36840700001)(46966006)(40470700004)(41300700001)(82740400003)(356005)(47076005)(83380400001)(36860700001)(7636003)(86362001)(36756003)(921011)(110136005)(70586007)(70206006)(7416002)(2906002)(15650500001)(4326008)(8676002)(8936002)(5660300002)(1076003)(2616005)(336012)(426003)(26005)(107886003)(316002)(478600001)(6666004)(40460700003)(40480700001);DIR:OUT;SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 17 Jan 2024 20:25:56.0992 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 1fea15eb-417c-409b-7798-08dc179a8287 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.118.232];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: CY4PEPF0000E9D3.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: BN9PR12MB5368 X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1788370761576991554 X-GMAIL-MSGID: 1788370761576991554 Scratch address space register is used to store reboot reason. For some Tegra234 systems, the scratch space is not available to store the reboot reason. This is because scratch region on these systems is not accessible by the kernel as restricted by the Hypervisor. Such systems would delist scratch aperture from PMC DT node. Accordingly, this change makes "scratch" as an optional aperture for Tegra234 in PMC dt-binding document. Signed-off-by: Petlozu Pravareshwar --- Changes in v2: - Fix dt_binding_check indentation warning. - Update 'reg-names' property items list. .../arm/tegra/nvidia,tegra186-pmc.yaml | 78 ++++++++++++++----- 1 file changed, 58 insertions(+), 20 deletions(-) diff --git a/Documentation/devicetree/bindings/arm/tegra/nvidia,tegra186-pmc.yaml b/Documentation/devicetree/bindings/arm/tegra/nvidia,tegra186-pmc.yaml index 0faa403f68c8..79928824005d 100644 --- a/Documentation/devicetree/bindings/arm/tegra/nvidia,tegra186-pmc.yaml +++ b/Documentation/devicetree/bindings/arm/tegra/nvidia,tegra186-pmc.yaml @@ -27,7 +27,7 @@ properties: - const: pmc - const: wake - const: aotag - - const: scratch + - enum: [ scratch, misc ] - const: misc interrupt-controller: true @@ -41,25 +41,63 @@ properties: description: If present, inverts the PMU interrupt signal. $ref: /schemas/types.yaml#/definitions/flag -if: - properties: - compatible: - contains: - const: nvidia,tegra186-pmc -then: - properties: - reg: - maxItems: 4 - - reg-names: - maxItems: 4 -else: - properties: - reg: - minItems: 5 - - reg-names: - minItems: 5 +allOf: + - if: + properties: + compatible: + contains: + const: nvidia,tegra186-pmc + then: + properties: + reg: + maxItems: 4 + reg-names: + items: + - const: pmc + - const: wake + - const: aotag + - const: scratch + + - if: + properties: + compatible: + contains: + const: nvidia,tegra194-pmc + then: + properties: + reg: + minItems: 5 + reg-names: + items: + - const: pmc + - const: wake + - const: aotag + - const: scratch + - const: misc + + - if: + properties: + compatible: + contains: + const: nvidia,tegra234-pmc + then: + properties: + reg: + minItems: 4 + maxItems: 5 + reg-names: + anyOf: + - items: + - const: pmc + - const: wake + - const: aotag + - const: misc + - items: + - const: pmc + - const: wake + - const: aotag + - const: scratch + - const: misc patternProperties: "^[a-z0-9]+-[a-z0-9]+$": From patchwork Wed Jan 17 20:25:04 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Petlozu Pravareshwar X-Patchwork-Id: 188937 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a05:7301:30f:b0:101:a8e8:374 with SMTP id ia15csp167213dyb; Wed, 17 Jan 2024 12:26:44 -0800 (PST) X-Google-Smtp-Source: AGHT+IEwun/TwU1NZfahT8uimHREzmy03Jt4HJDaNdzWfMzvJsH8DoyyVq8BQuS/NuZWGlCu7LnP X-Received: by 2002:a05:6808:11ce:b0:3bd:328b:4907 with SMTP id p14-20020a05680811ce00b003bd328b4907mr10131941oiv.25.1705523204008; Wed, 17 Jan 2024 12:26:44 -0800 (PST) Received: from ny.mirrors.kernel.org (ny.mirrors.kernel.org. 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Wed, 17 Jan 2024 12:25:57 -0800 From: Petlozu Pravareshwar To: , , , , , , , , , , , , , CC: Subject: [PATCH V2 3/3] soc/tegra: pmc: Update scratch as an optional aperture Date: Wed, 17 Jan 2024 20:25:04 +0000 Message-ID: <20240117202504.943476-3-petlozup@nvidia.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20240117202504.943476-1-petlozup@nvidia.com> References: <20240117202504.943476-1-petlozup@nvidia.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-NVConfidentiality: public X-NV-OnPremToCloud: ExternallySecured X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BL02EPF0001A0FB:EE_|SN7PR12MB6766:EE_ X-MS-Office365-Filtering-Correlation-Id: 9c87052d-7dc8-44b9-4f44-08dc179a898a X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:216.228.118.233;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:mail.nvidia.com;PTR:dc7edge2.nvidia.com;CAT:NONE;SFS:(13230031)(4636009)(376002)(346002)(396003)(136003)(39860400002)(230922051799003)(451199024)(1800799012)(82310400011)(64100799003)(186009)(46966006)(36840700001)(40470700004)(921011)(5660300002)(7416002)(2906002)(41300700001)(82740400003)(1076003)(26005)(2616005)(40460700003)(83380400001)(40480700001)(336012)(426003)(6666004)(36860700001)(478600001)(47076005)(107886003)(4326008)(8676002)(86362001)(8936002)(70206006)(70586007)(7636003)(316002)(36756003)(110136005)(356005);DIR:OUT;SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 17 Jan 2024 20:26:07.7525 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 9c87052d-7dc8-44b9-4f44-08dc179a898a X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.118.233];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: BL02EPF0001A0FB.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SN7PR12MB6766 X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1788370699107381019 X-GMAIL-MSGID: 1788370699107381019 Scratch address space register is used to store reboot reason. For some Tegra234 systems, the scratch space is not available to store the reboot reason. This is because scratch region on these systems is not accessible by the kernel as restricted by the Hypervisor. Such systems would delist scratch aperture from PMC DT node. Hence this change makes scratch as optional aperture and also avoids registering reboot notifier if scratch address space isn't mapped. Signed-off-by: Petlozu Pravareshwar --- drivers/soc/tegra/pmc.c | 26 +++++++++++++++++--------- 1 file changed, 17 insertions(+), 9 deletions(-) diff --git a/drivers/soc/tegra/pmc.c b/drivers/soc/tegra/pmc.c index 0bc983f6b088..6948f78c7a4a 100644 --- a/drivers/soc/tegra/pmc.c +++ b/drivers/soc/tegra/pmc.c @@ -2903,11 +2903,16 @@ static int tegra_pmc_probe(struct platform_device *pdev) if (IS_ERR(pmc->aotag)) return PTR_ERR(pmc->aotag); + /* "scratch" is an optional aperture */ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "scratch"); - pmc->scratch = devm_ioremap_resource(&pdev->dev, res); - if (IS_ERR(pmc->scratch)) - return PTR_ERR(pmc->scratch); + if (res) { + pmc->scratch = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(pmc->scratch)) + return PTR_ERR(pmc->scratch); + } else { + pmc->scratch = NULL; + } } pmc->clk = devm_clk_get_optional(&pdev->dev, "pclk"); @@ -2919,12 +2924,15 @@ static int tegra_pmc_probe(struct platform_device *pdev) * PMC should be last resort for restarting since it soft-resets * CPU without resetting everything else. */ - err = devm_register_reboot_notifier(&pdev->dev, - &tegra_pmc_reboot_notifier); - if (err) { - dev_err(&pdev->dev, "unable to register reboot notifier, %d\n", - err); - return err; + if (pmc->scratch) { + err = devm_register_reboot_notifier(&pdev->dev, + &tegra_pmc_reboot_notifier); + if (err) { + dev_err(&pdev->dev, + "unable to register reboot notifier, %d\n", + err); + return err; + } } err = devm_register_sys_off_handler(&pdev->dev,