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Sun, 17 Aug 2025 21:34:05 -0700 From: Akhil R To: , , , , , , , , CC: , , , , Thierry Reding Subject: [PATCH RESEND 1/2] dt-bindings: i2c: nvidia,tegra20-i2c: Add Tegra256 I2C compatible Date: Mon, 18 Aug 2025 10:03:44 +0530 Message-ID: <20250818043345.65899-2-akhilrajeev@nvidia.com> X-Mailer: git-send-email 2.50.1 In-Reply-To: <20250818043345.65899-1-akhilrajeev@nvidia.com> References: <20250818043345.65899-1-akhilrajeev@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 Content-Transfer-Encoding: quoted-printable X-NV-OnPremToCloud: ExternallySecured X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SJ1PEPF000023D1:EE_|CH3PR12MB9169:EE_ X-MS-Office365-Filtering-Correlation-Id: bb35f783-d843-4377-a72e-08ddde108078 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|36860700013|1800799024|7416014|376014|82310400026; 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X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 18 Aug 2025 04:34:21.2260 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: bb35f783-d843-4377-a72e-08ddde108078 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.117.160];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: SJ1PEPF000023D1.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CH3PR12MB9169 Content-Type: text/plain; charset="utf-8" Add compatible for Tegra256 I2C controllers. Tegra256 consists of 8 generic Tegra I2C controllers similar to previous generations. The parent clock frequency is different in these controllers and hence the timing parameter values are different from the previous ones. Signed-off-by: Akhil R Acked-by: Rob Herring (Arm) Acked-by: Thierry Reding --- .../devicetree/bindings/i2c/nvidia,tegra20-i2c.yaml | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/Documentation/devicetree/bindings/i2c/nvidia,tegra20-i2c.yaml = b/Documentation/devicetree/bindings/i2c/nvidia,tegra20-i2c.yaml index 6b6f6762d122..6f58eb79a7b3 100644 --- a/Documentation/devicetree/bindings/i2c/nvidia,tegra20-i2c.yaml +++ b/Documentation/devicetree/bindings/i2c/nvidia,tegra20-i2c.yaml @@ -80,6 +80,11 @@ properties: support for 64 KiB transactions whereas earlier chips supported = no more than 4 KiB per transactions. const: nvidia,tegra194-i2c + - description: | + Tegra256 has 8 generic I2C controllers. 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X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 18 Aug 2025 04:34:42.9661 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: d0305726-e67b-4f4c-e4fb-08ddde108d88 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.117.160];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: BN2PEPF000044AC.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: MW4PR12MB7357 Content-Type: text/plain; charset="utf-8" Add compatible and the hardware struct for Tegra256. Tegra256 controllers use a different parent clock. Hence the timing parameters are different from the previous generations to meet the expected frequencies. Signed-off-by: Akhil R Acked-by: Thierry Reding --- drivers/i2c/busses/i2c-tegra.c | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) diff --git a/drivers/i2c/busses/i2c-tegra.c b/drivers/i2c/busses/i2c-tegra.c index 4eb31b913c1a..e533460bccc3 100644 --- a/drivers/i2c/busses/i2c-tegra.c +++ b/drivers/i2c/busses/i2c-tegra.c @@ -1649,7 +1649,33 @@ static const struct tegra_i2c_hw_feature tegra194_i2= c_hw =3D { .has_interface_timing_reg =3D true, }; =20 +static const struct tegra_i2c_hw_feature tegra256_i2c_hw =3D { + .has_continue_xfer_support =3D true, + .has_per_pkt_xfer_complete_irq =3D true, + .clk_divisor_hs_mode =3D 7, + .clk_divisor_std_mode =3D 0x7a, + .clk_divisor_fast_mode =3D 0x40, + .clk_divisor_fast_plus_mode =3D 0x19, + .has_config_load_reg =3D true, + .has_multi_master_mode =3D true, + .has_slcg_override_reg =3D true, + .has_mst_fifo =3D true, + .has_mst_reset =3D true, + .quirks =3D &tegra194_i2c_quirks, + .supports_bus_clear =3D true, + .has_apb_dma =3D false, + .tlow_std_mode =3D 0x8, + .thigh_std_mode =3D 0x7, + .tlow_fast_fastplus_mode =3D 0x3, + .thigh_fast_fastplus_mode =3D 0x3, + .setup_hold_time_std_mode =3D 0x08080808, + .setup_hold_time_fast_fast_plus_mode =3D 0x02020202, + .setup_hold_time_hs_mode =3D 0x090909, + .has_interface_timing_reg =3D true, +}; + static const struct of_device_id tegra_i2c_of_match[] =3D { + { .compatible =3D "nvidia,tegra256-i2c", .data =3D &tegra256_i2c_hw, }, { .compatible =3D "nvidia,tegra194-i2c", .data =3D &tegra194_i2c_hw, }, { .compatible =3D "nvidia,tegra186-i2c", .data =3D &tegra186_i2c_hw, }, #if IS_ENABLED(CONFIG_ARCH_TEGRA_210_SOC) --=20 2.50.1