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Fri, 14 Nov 2025 20:27:45 -0800 From: Akhil R To: , , , , , , , , CC: , , , Subject: [PATCH v12 3/6] i2c: tegra: Update Tegra256 timing parameters Date: Sat, 15 Nov 2025 09:56:29 +0530 Message-ID: <20251115042632.69708-4-akhilrajeev@nvidia.com> X-Mailer: git-send-email 2.50.1 In-Reply-To: <20251115042632.69708-1-akhilrajeev@nvidia.com> References: <20251115042632.69708-1-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: SN1PEPF000397B2:EE_|IA1PR12MB7662:EE_ X-MS-Office365-Filtering-Correlation-Id: 16d76fcc-2387-4453-003f-08de23ff5ba2 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|376014|82310400026|36860700013|1800799024; X-Microsoft-Antispam-Message-Info: =?us-ascii?Q?89jCb+bQA74XLi7WThr/hXYZWiMBy/RL0cUBywJyqK6d3h7oMSMgUBunerFY?= =?us-ascii?Q?91Z3GOUjqo6Wn11FczeRwxIY6vGgOVeRq+LvrR6oCiHRspgdYLfaBkYBcbDU?= =?us-ascii?Q?ComdsGpAhQwsrDwF7HMUkVa5ZDEjBD5dqqbpztKkxtQRshXUBL+FB5Qe6Vdr?= =?us-ascii?Q?DpBg1tw9+oLjpPMyuDilrpz1lPoN3QVVFZCtVdpYhyk8eAE+5wKoiRwYGCbI?= =?us-ascii?Q?C7AGPDQDI5yzQGhuYDloKPR+hvE/ZEUZGA2S8XIngC8KsTNM+U/w3ozYq890?= =?us-ascii?Q?diD8y+zk2O4rjfHKo9qldzg1G2lPJO31nAls9x/HJKsPuPjgNsL5y5dr3QB9?= =?us-ascii?Q?Ba6JNqBdFdPlG3dkn9JxI3y0qhM3EsNucsfEbiih2En/LkFVCj0YabnXd7Y2?= =?us-ascii?Q?Wlc/gLKRr8CgFRxXl6h4vNh036UhXnlnV5SbbbAJbCdMHLxNwQOYQQnjAuYM?= =?us-ascii?Q?+bxAIebAhovS8D7SOIXZkEKixJhslIIYFJhcbBfR6eRGNMAKFxY2QZsuA1+c?= =?us-ascii?Q?a6TUkHZ7bL+yukK1iq7cY1bJ/v2fOHEBIH0i04heUPwUc70JIJCDYpURGbPV?= =?us-ascii?Q?kHXgNYK067N0U/sSZO3rqdqU6VMbFIGgTxAceTR15DB2hXkS/OJRvK8Yd3ui?= =?us-ascii?Q?EdO7Sl6reegrMY+mLCfZ4VPunmz7XIk/xjx40McjFKLkgcn2n1OkBJxODssm?= =?us-ascii?Q?YgQ/ffUrzGDBCOMIYt/wpkkqHdjKiG7OBUL5nIjTOKFK1LkDmp+iviqXnJzl?= =?us-ascii?Q?hTFJeFzuydh+TFa+2kw/dpWzOWjsg/kTnHHHDtI/Vlmicj/iqOIOuunAzobv?= =?us-ascii?Q?LlABbL/jpQZfD/KpNadqEwK7dGh99vP3mw9c65wbKMX3X80Dimb7ACXzEckz?= =?us-ascii?Q?+3TEIrM6bwdDuVpTXHiqCY4ibbBRM9MxQvWqJYLox0HML7DfvujSHSleOq5b?= =?us-ascii?Q?jNdVbYXIw+FQMWB2I5UKrL4Vl/zvV7plED21l3dbXfgI3IWjCUe2sF31Ryi5?= =?us-ascii?Q?Ely9Bg1PNXDYKyZcs6q+V+U2UswmRS6wbRBKXsF7l00pKktG3Oau33uFa3/J?= =?us-ascii?Q?F7JHG7zMzIx4+tyWD/iL8Pvkmm81oTQemOvB7Pe8zNs3JKwgI76hOBqR+n31?= =?us-ascii?Q?6TtHq8veEDqfcpLl9H6ku2uA+HH0edsL5ic0/QJcqsyr/i82wMtaCmuVCRdz?= =?us-ascii?Q?t7zZ3A0CJfkJSzAPxek0e5MwIOGg7aSuWiu9bZ8GHeNR6DW6lclNAQiyh8rQ?= =?us-ascii?Q?g7EAWpWytD+oMVrj7kpAMn1d4TsMjSnvgyOj/UvsszD48qobHpCxvyEkscsK?= =?us-ascii?Q?5RQSMBEwSJfkpARWBbhKxiiP2KXXViLsQWUijBdWCf1QYhFA0PTtSzF0gdZf?= =?us-ascii?Q?HZxMo8PwL/7p4YdS2AmSLW9M8e7s5ioOjokjWJr7cknf/BLLgSrMIGKuLiUT?= =?us-ascii?Q?aYFH++rP7C9gHsNSKfwoVPa1kMKtBxM3VdMO92jK/m+W6bRxPU3mGrM/NXa+?= =?us-ascii?Q?gIYyRu1ZXfkaigez2j3b1CIwYpr/EoatF0H0HXPrLn4bK6kcbCqssVNBS+Zp?= =?us-ascii?Q?QMhwRLFs5Nuop5anMN8=3D?= X-Forefront-Antispam-Report: CIP:216.228.117.161;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:mail.nvidia.com;PTR:dc6edge2.nvidia.com;CAT:NONE;SFS:(13230040)(376014)(82310400026)(36860700013)(1800799024);DIR:OUT;SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 15 Nov 2025 04:27:59.2714 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 16d76fcc-2387-4453-003f-08de23ff5ba2 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.117.161];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: SN1PEPF000397B2.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: IA1PR12MB7662 Content-Type: text/plain; charset="utf-8" Update the timing parameters of Tegra256 so that the signals are complaint with the I2C specification for SCL low time. Signed-off-by: Akhil R Reviewed-by: Jon Hunter --- drivers/i2c/busses/i2c-tegra.c | 16 +++++++--------- 1 file changed, 7 insertions(+), 9 deletions(-) diff --git a/drivers/i2c/busses/i2c-tegra.c b/drivers/i2c/busses/i2c-tegra.c index c0382c9a0430..8a696c88882e 100644 --- a/drivers/i2c/busses/i2c-tegra.c +++ b/drivers/i2c/busses/i2c-tegra.c @@ -1677,14 +1677,13 @@ static const struct tegra_i2c_hw_feature tegra194_i= 2c_hw =3D { .setup_hold_time_hs_mode =3D 0x090909, .has_interface_timing_reg =3D true, }; - 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, + .clk_divisor_fast_plus_mode =3D 0x14, .has_config_load_reg =3D true, .has_multi_master_mode =3D true, .has_slcg_override_reg =3D true, @@ -1695,14 +1694,13 @@ static const struct tegra_i2c_hw_feature tegra256_i= 2c_hw =3D { .has_apb_dma =3D false, .tlow_std_mode =3D 0x8, .thigh_std_mode =3D 0x7, - .tlow_fast_mode =3D 0x3, - .thigh_fast_mode =3D 0x3, - .tlow_fastplus_mode =3D 0x3, - .thigh_fastplus_mode =3D 0x3, + .tlow_fast_mode =3D 0x4, + .thigh_fast_mode =3D 0x2, + .tlow_fastplus_mode =3D 0x4, + .thigh_fastplus_mode =3D 0x4, .setup_hold_time_std_mode =3D 0x08080808, - .setup_hold_time_fast_mode =3D 0x02020202, - .setup_hold_time_fastplus_mode =3D 0x02020202, - .setup_hold_time_hs_mode =3D 0x090909, + .setup_hold_time_fast_mode =3D 0x04010101, + .setup_hold_time_fastplus_mode =3D 0x04020202, .has_interface_timing_reg =3D true, }; =20 --=20 2.50.1