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Fri, 7 Jan 2022 09:05:00 +0000 From: Wayne Chang To: , , , CC: , , , , , , , Subject: [PATCH 1/1] usb: gadget: tegra-xudc: Do not program SPARAM Date: Fri, 7 Jan 2022 17:04:43 +0800 Message-ID: <20220107090443.149021-1-waynec@nvidia.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 X-NVConfidentiality: public Content-Transfer-Encoding: 8bit Content-Type: text/plain X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 1d702ae6-3b48-4a5f-d3ba-08d9d1bccb70 X-MS-TrafficTypeDiagnostic: SN1PR12MB2447:EE_ X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:4502; X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:12.22.5.235;CTRY:US;LANG:en;SCL:1;SRV:;IPV:CAL;SFV:NSPM;H:mail.nvidia.com;PTR:InfoNoRecords;CAT:NONE;SFS:(4636009)(36840700001)(46966006)(40470700002)(4326008)(36860700001)(47076005)(83380400001)(5660300002)(6666004)(81166007)(356005)(316002)(36756003)(82310400004)(1076003)(7416002)(26005)(2616005)(86362001)(54906003)(70206006)(336012)(70586007)(2906002)(110136005)(186003)(426003)(6636002)(7696005)(8676002)(40460700001)(8936002)(508600001)(36900700001);DIR:OUT;SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 07 Jan 2022 09:05:04.5611 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 1d702ae6-3b48-4a5f-d3ba-08d9d1bccb70 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[12.22.5.235];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: CO1NAM11FT016.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SN1PR12MB2447 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org According to the Tegra Technical Reference Manual, SPARAM is a read-only register and should not be programmed in the driver. The change removes the wrong SPARAM usage. Signed-off-by: Wayne Chang --- drivers/usb/gadget/udc/tegra-xudc.c | 8 -------- 1 file changed, 8 deletions(-) diff --git a/drivers/usb/gadget/udc/tegra-xudc.c b/drivers/usb/gadget/udc/tegra-xudc.c index 43f1b0d461c1..716d9ab2d2ff 100644 --- a/drivers/usb/gadget/udc/tegra-xudc.c +++ b/drivers/usb/gadget/udc/tegra-xudc.c @@ -32,9 +32,6 @@ #include /* XUSB_DEV registers */ -#define SPARAM 0x000 -#define SPARAM_ERSTMAX_MASK GENMASK(20, 16) -#define SPARAM_ERSTMAX(x) (((x) << 16) & SPARAM_ERSTMAX_MASK) #define DB 0x004 #define DB_TARGET_MASK GENMASK(15, 8) #define DB_TARGET(x) (((x) << 8) & DB_TARGET_MASK) @@ -3295,11 +3292,6 @@ static void tegra_xudc_init_event_ring(struct tegra_xudc *xudc) unsigned int i; u32 val; - val = xudc_readl(xudc, SPARAM); - val &= ~(SPARAM_ERSTMAX_MASK); - val |= SPARAM_ERSTMAX(XUDC_NR_EVENT_RINGS); - xudc_writel(xudc, val, SPARAM); - for (i = 0; i < ARRAY_SIZE(xudc->event_ring); i++) { memset(xudc->event_ring[i], 0, XUDC_EVENT_RING_SIZE * sizeof(*xudc->event_ring[i])); -- 2.25.1