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Wed, 12 Jun 2024 15:52:51 -0700 From: Liming Sun To: Adrian Hunter , Ulf Hansson , David Thompson CC: Liming Sun , , Subject: [PATCH v1 2/2] dw_mmc-bluefield: add hw_reset() support Date: Wed, 12 Jun 2024 18:52:38 -0400 Message-ID: <2c459196c6867e325f9386ec0559efea464cfdd6.1718213918.git.limings@nvidia.com> X-Mailer: git-send-email 2.30.1 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-mmc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-NV-OnPremToCloud: ExternallySecured X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SA2PEPF000015C9:EE_|PH7PR12MB9128:EE_ X-MS-Office365-Filtering-Correlation-Id: 50a7f900-cce9-41ac-61bb-08dc8b32691f X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230034|376008|1800799018|82310400020|36860700007; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:216.228.118.232;CTRY:US;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:mail.nvidia.com;PTR:dc7edge1.nvidia.com;CAT:NONE;SFS:(13230034)(376008)(1800799018)(82310400020)(36860700007);DIR:OUT;SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 12 Jun 2024 22:53:00.6651 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 50a7f900-cce9-41ac-61bb-08dc8b32691f X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.118.232];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: SA2PEPF000015C9.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: PH7PR12MB9128 The eMMC RST_N register is implemented as secure register on BlueField SoC and controlled by ATF. This commit sends SMC call to ATF for the eMMC HW reset. Reviewed-by: David Thompson Signed-off-by: Liming Sun --- drivers/mmc/host/dw_mmc-bluefield.c | 18 +++++++++++++++++- 1 file changed, 17 insertions(+), 1 deletion(-) diff --git a/drivers/mmc/host/dw_mmc-bluefield.c b/drivers/mmc/host/dw_mmc-bluefield.c index 4747e5698f48..24e0b604b405 100644 --- a/drivers/mmc/host/dw_mmc-bluefield.c +++ b/drivers/mmc/host/dw_mmc-bluefield.c @@ -3,6 +3,7 @@ * Copyright (C) 2018 Mellanox Technologies. */ +#include #include #include #include @@ -20,6 +21,9 @@ #define BLUEFIELD_UHS_REG_EXT_SAMPLE 2 #define BLUEFIELD_UHS_REG_EXT_DRIVE 4 +/* SMC call for RST_N */ +#define BLUEFIELD_SMC_SET_EMMC_RST_N 0x82000007 + static void dw_mci_bluefield_set_ios(struct dw_mci *host, struct mmc_ios *ios) { u32 reg; @@ -34,8 +38,20 @@ static void dw_mci_bluefield_set_ios(struct dw_mci *host, struct mmc_ios *ios) mci_writel(host, UHS_REG_EXT, reg); } +static void dw_mci_bluefield_hw_reset(struct dw_mci *host) +{ + struct arm_smccc_res res = { 0 }; + + arm_smccc_smc(BLUEFIELD_SMC_SET_EMMC_RST_N, 0, 0, 0, 0, 0, 0, 0, + &res); + + if (res.a0) + pr_err("RST_N failed.\n"); +} + static const struct dw_mci_drv_data bluefield_drv_data = { - .set_ios = dw_mci_bluefield_set_ios + .set_ios = dw_mci_bluefield_set_ios, + .hw_reset = dw_mci_bluefield_hw_reset }; static const struct of_device_id dw_mci_bluefield_match[] = {