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Mon, 12 Jan 2026 18:29:54 -0600 Received: from [128.247.81.105] (judy-hp.dhcp.ti.com [128.247.81.105]) by lelvem-mr05.itg.ti.com (8.18.1/8.18.1) with ESMTP id 60D0TseS1367042; Mon, 12 Jan 2026 18:29:54 -0600 Message-ID: Date: Mon, 12 Jan 2026 18:29:54 -0600 Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] arm64: dts: ti: k3-am62a7-sk: Disable mmc Schmitt Trigger To: "Markus Schneider-Pargmann (TI.com)" , Nishanth Menon , Vignesh Raghavendra , Tero Kristo , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Alexander Sverdlin CC: Vishal Mahaveer , Kevin Hilman , Dhruva Gole , Sebin Francis , "Kendall Willis" , Akashdeep Kaur , , , References: <20260106-topic-am62a-mmc-pinctrl-v6-19-next-v1-1-1190ac29aadb@baylibre.com> Content-Language: en-US From: Judith Mendez In-Reply-To: <20260106-topic-am62a-mmc-pinctrl-v6-19-next-v1-1-1190ac29aadb@baylibre.com> Content-Type: text/plain; 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X-OriginatorOrg: ti.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 13 Jan 2026 00:29:55.4216 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: d8ff3681-0657-4077-415d-08de523ae027 X-MS-Exchange-CrossTenant-Id: e5b49634-450b-4709-8abb-1e2b19b982b7 X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=e5b49634-450b-4709-8abb-1e2b19b982b7;Ip=[198.47.21.194];Helo=[flwvzet200.ext.ti.com] X-MS-Exchange-CrossTenant-AuthSource: BN3PEPF0000B06C.namprd21.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CH0PR10MB4971 On 1/6/26 10:22 AM, Markus Schneider-Pargmann (TI.com) wrote: > Remove Schmitt Trigger from mmc pins. With Schmitt Trigger enabled > u-boot SPL is not able to read u-boot from mmc: > > Trying to boot from MMC2 > Error reading cluster > spl_load_image_fat: error reading image u-boot.img, err - -22 > Error: -22 > SPL: Unsupported Boot Device! > SPL: failed to boot from all boot devices > ### ERROR ### Please RESET the board ### > > I bisected this issue between u-boot v2025.10 and v2026.01 and found the > devicetree merge to be the problem. At a closer look I found the > k3-pinctrl.h changes. Disabling the Schmitt Trigger fixes the u-boot SPL > failure to read from mmc. I have tested 4 AM62A SK boards and I cannot replicate the issue you are seeing. I do not see an issue with Schmitt Trigger in U-boot nor Linux /: Can you please run a quick tap sweep on MMC1 and MMC0 interfaces like so? https://gist.github.com/jmenti/f4a73a8323e44bf717c6d2c528c499ca This will give me an idea if whether we should be talking about revisiting characterization with ST_ENA=1. Also, are you able to replicate the issue on more than one board? Or is this the only board you see the issue on? ~ Judith