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Garcia Porras" To: opensbi@lists.infradead.org Cc: "David E. Garcia Porras" Subject: [PATCH] lib: utils/regmap: Fix reg_stride calculation in syscon regmap Date: Fri, 3 Apr 2026 14:29:03 -0600 Message-ID: <20260403202903.3407945-1-david.garcia@aheadcomputing.com> X-Mailer: git-send-email 2.43.0 MIME-Version: 1.0 X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DM2PEPF00003FC7:EE_|CO6PR22MB2916:EE_ X-MS-Office365-Filtering-Correlation-Id: 71c95d3f-f0b4-4198-bfac-08de91bfa947 X-MS-Exchange-AtpMessageProperties: SA X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|82310400026|1800799024|376014|36860700016|56012099003|18002099003|55112099003; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:50.45.236.54;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:mail.aheadcomputing.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230040)(82310400026)(1800799024)(376014)(36860700016)(56012099003)(18002099003)(55112099003);DIR:OUT;SFP:1102; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: C80wdZO2M+15X+v/6BxgsDZgljrGrNFXiFbW/1SQDTTKuuvW046FAakOnMG2XcFTEd9YSuPZtKwByRdg8rdEJDm4hsZCKIY2UqJS7plOdjeBJkbNS5wm50hN8zBrj/4XFixftuHoN6sRhx04mDrArvlfzeLEXDq17PgUvz2oN7q2ocQXP1XhkRUGJN/EgP8fWukr70PJYWlkpvk+oslDYnO45EjN7fq8WQUJkxBPZreVhc1eSN8RKXIplApubwZU4QKrAgd6ydUsswKUBmDV/pkOCXayy/1cwSW+NcPV/TkIET05h4kxzo9QRZDmgJpOcBEFGnTMO0Gte6cV9RlFgtrzrTFU3dcbBdrwI37J8g5e/iiqyyB49CLvYTGEoJMrhulTBnqnuriaBWMQPfs3NOdCdf/OcEgiQBciwXKYyw7PR6UCxKj35cncfXeJetgl X-OriginatorOrg: aheadcomputing.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 03 Apr 2026 20:29:09.6733 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 71c95d3f-f0b4-4198-bfac-08de91bfa947 X-MS-Exchange-CrossTenant-Id: 53cf747c-7b8f-4d06-8b1e-b22383a3fabf X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=53cf747c-7b8f-4d06-8b1e-b22383a3fabf;Ip=[50.45.236.54];Helo=[mail.aheadcomputing.com] X-MS-Exchange-CrossTenant-AuthSource: DM2PEPF00003FC7.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CO6PR22MB2916 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260403_132915_838221_900A4C49 X-CRM114-Status: UNSURE ( 9.26 ) X-CRM114-Notice: Please train this message. X-BeenThere: opensbi@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "opensbi" Errors-To: opensbi-bounces+opensbi=archiver.kernel.org@lists.infradead.org The reg_stride field represents the address stride in bytes between consecutive registers. The Linux kernel regmap framework validates register accesses using IS_ALIGNED(reg, map->reg_stride) as an address alignment check (drivers/base/regmap/regmap.c). The Linux kernel syscon driver (drivers/mfd/syscon.c) sets reg_stride directly to reg_io_width: syscon_config.reg_stride = reg_io_width; The current OpenSBI code incorrectly multiplies reg_io_width by 8, converting a byte value to bits. Fix this by using reg_io_width directly as the stride value, consistent with the Linux kernel. Signed-off-by: David E. Garcia Porras --- lib/utils/regmap/fdt_regmap_syscon.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/lib/utils/regmap/fdt_regmap_syscon.c b/lib/utils/regmap/fdt_regmap_syscon.c index 1309a55c..59cd5ee5 100644 --- a/lib/utils/regmap/fdt_regmap_syscon.c +++ b/lib/utils/regmap/fdt_regmap_syscon.c @@ -190,7 +190,7 @@ static int regmap_syscon_init(const void *fdt, int nodeoff, srm->rmap.id = nodeoff; srm->rmap.reg_shift = 0; - srm->rmap.reg_stride = srm->reg_io_width * 8; + srm->rmap.reg_stride = srm->reg_io_width; srm->rmap.reg_base = 0; srm->rmap.reg_max = size / srm->reg_io_width; switch (srm->reg_io_width) { -- 2.43.0 -- opensbi mailing list opensbi@lists.infradead.org http://lists.infradead.org/mailman/listinfo/opensbi