{"id":2223046,"url":"http://patchwork.ozlabs.org/api/patches/2223046/?format=json","web_url":"http://patchwork.ozlabs.org/project/uboot/patch/20260414-fix_usb_adc_meausurement-v1-1-8cdbd4c10dd8@foss.st.com/","project":{"id":18,"url":"http://patchwork.ozlabs.org/api/projects/18/?format=json","name":"U-Boot","link_name":"uboot","list_id":"u-boot.lists.denx.de","list_email":"u-boot@lists.denx.de","web_url":null,"scm_url":null,"webscm_url":null,"list_archive_url":"","list_archive_url_format":"","commit_url_format":""},"msgid":"<20260414-fix_usb_adc_meausurement-v1-1-8cdbd4c10dd8@foss.st.com>","list_archive_url":null,"date":"2026-04-14T09:06:50","name":"board: stm32pm1: Fix board_check_usb_power()","commit_ref":null,"pull_url":null,"state":"new","archived":false,"hash":"09404765bd68bf13fe5d3f812a85eed3318dc1a7","submitter":{"id":80709,"url":"http://patchwork.ozlabs.org/api/people/80709/?format=json","name":"Patrice Chotard","email":"patrice.chotard@foss.st.com"},"delegate":{"id":70413,"url":"http://patchwork.ozlabs.org/api/users/70413/?format=json","username":"pchotard","first_name":"Patrice","last_name":"Chotard","email":"patrice.chotard@st.com"},"mbox":"http://patchwork.ozlabs.org/project/uboot/patch/20260414-fix_usb_adc_meausurement-v1-1-8cdbd4c10dd8@foss.st.com/mbox/","series":[{"id":499803,"url":"http://patchwork.ozlabs.org/api/series/499803/?format=json","web_url":"http://patchwork.ozlabs.org/project/uboot/list/?series=499803","date":"2026-04-14T09:06:50","name":"board: stm32pm1: Fix board_check_usb_power()","version":1,"mbox":"http://patchwork.ozlabs.org/series/499803/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/patches/2223046/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2223046/checks/","tags":{},"related":[],"headers":{"Return-Path":"","X-Original-To":"incoming@patchwork.ozlabs.org","Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=foss.st.com header.i=@foss.st.com header.a=rsa-sha256\n header.s=selector2 header.b=ZUj9GJh2;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=lists.denx.de\n (client-ip=2a01:238:438b:c500:173d:9f52:ddab:ee01; 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Ip=[164.130.1.59];\n Helo=[smtpO365.st.com]","X-MS-Exchange-CrossTenant-AuthSource":"\n AM3PEPF00009B9E.eurprd04.prod.outlook.com","X-MS-Exchange-CrossTenant-AuthAs":"Anonymous","X-MS-Exchange-CrossTenant-FromEntityHeader":"HybridOnPrem","X-MS-Exchange-Transport-CrossTenantHeadersStamped":"PAVPR10MB6791","X-BeenThere":"u-boot@lists.denx.de","X-Mailman-Version":"2.1.39","Precedence":"list","List-Id":"U-Boot discussion ","List-Unsubscribe":",\n ","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n ","Errors-To":"u-boot-bounces@lists.denx.de","Sender":"\"U-Boot\" ","X-Virus-Scanned":"clamav-milter 0.103.8 at phobos.denx.de","X-Virus-Status":"Clean"},"content":"Depending of plugged power source (computer, wall charger, ...) it can\nhappen that we got the following message:\n\n\"****************************************************\"\n\"* USB TYPE-C charger not compliant with *\"\n\"* specification *\"\n\"****************************************************\"\n\" \"\n\"### ERROR ### Please RESET the board ### \"\n\nThis issue has been detected on STM32MP135f-DK board.\n\nIt's due to max_uV and min_uV value are initialized at beginning of\nboard_check_usb_power() and can then be used for the 2 iteration of\nadc_measurement().\nmax_uV/min_uV values issued of the first adc_measurement() iteration\nare used as input of the second adc_measurement() iteration, which\ncan lead to incoherent pair of min_uV/max_uV values.\n\nTo ensure that adc_measurement() returns coherent value for max_uV and\nmin_uV, initialize max_uV and min_uV at each loop start.\n\nSigned-off-by: Patrice Chotard \n---\n board/st/stm32mp1/stm32mp1.c | 7 +++++--\n 1 file changed, 5 insertions(+), 2 deletions(-)\n\n\n---\nbase-commit: 88dc2788777babfd6322fa655df549a019aa1e69\nchange-id: 20260414-fix_usb_adc_meausurement-e4e9b7988ccb\n\nBest regards,","diff":"diff --git a/board/st/stm32mp1/stm32mp1.c b/board/st/stm32mp1/stm32mp1.c\nindex 5f7c6822116..88ede4e3910 100644\n--- a/board/st/stm32mp1/stm32mp1.c\n+++ b/board/st/stm32mp1/stm32mp1.c\n@@ -326,8 +326,8 @@ static int adc_measurement(ofnode node, int adc_count, int *min_uV, int *max_uV)\n static int board_check_usb_power(void)\n {\n \tofnode node;\n-\tint max_uV = 0;\n-\tint min_uV = USB_START_HIGH_THRESHOLD_UV;\n+\tint max_uV;\n+\tint min_uV;\n \tint adc_count, ret;\n \tu32 nb_blink;\n \tu8 i;\n@@ -358,6 +358,9 @@ static int board_check_usb_power(void)\n \n \t/* perform maximum of 2 ADC measurements to detect power supply current */\n \tfor (i = 0; i < 2; i++) {\n+\t\tmax_uV = 0;\n+\t\tmin_uV = USB_START_HIGH_THRESHOLD_UV;\n+\n \t\tret = adc_measurement(node, adc_count, &min_uV, &max_uV);\n \t\tif (ret)\n \t\t\treturn ret;\n","prefixes":[]}