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client-ip=165.204.84.17; helo=SATLEXMB04.amd.com; pr=C Received: from SATLEXMB04.amd.com (165.204.84.17) by SN1PEPF000397B0.mail.protection.outlook.com (10.167.248.54) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.20.8534.20 via Frontend Transport; Thu, 13 Mar 2025 18:35:55 +0000 Received: from airavat.amd.com (10.180.168.240) by SATLEXMB04.amd.com (10.181.40.145) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.39; Thu, 13 Mar 2025 13:35:53 -0500 From: Raju Rangoju To: , , CC: , , Subject: [PATCH 07/10] spi: espi_amd: Add eSPI set frequency IOCTL command Date: Fri, 14 Mar 2025 00:04:37 +0530 Message-ID: <20250313183440.261872-8-Raju.Rangoju@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20250313183440.261872-1-Raju.Rangoju@amd.com> References: <20250313183440.261872-1-Raju.Rangoju@amd.com> Precedence: bulk X-Mailing-List: linux-spi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ClientProxiedBy: SATLEXMB03.amd.com (10.181.40.144) To SATLEXMB04.amd.com (10.181.40.145) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SN1PEPF000397B0:EE_|LV8PR12MB9083:EE_ X-MS-Office365-Filtering-Correlation-Id: 969d2c78-9bac-4a1c-f15d-08dd625de437 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|36860700013|376014|82310400026; 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X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 13 Mar 2025 18:35:55.5736 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 969d2c78-9bac-4a1c-f15d-08dd625de437 X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: SN1PEPF000397B0.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: LV8PR12MB9083 This patch adds support for a new IOCTL command in the espi_amd driver to set the operating frequency of the eSPI controller. The frequency value can be one of the following supported options: 16MHz, 33MHz or 66MHz. Co-developed-by: Krishnamoorthi M Signed-off-by: Krishnamoorthi M Co-developed-by: Akshata MukundShetty Signed-off-by: Akshata MukundShetty Signed-off-by: Raju Rangoju --- drivers/spi/espi-amd-dev.c | 40 ++++++++++++++++++++++++++++++++++++++ drivers/spi/espi-amd.h | 1 + 2 files changed, 41 insertions(+) diff --git a/drivers/spi/espi-amd-dev.c b/drivers/spi/espi-amd-dev.c index c78a9b2b059b..9f1968566980 100644 --- a/drivers/spi/espi-amd-dev.c +++ b/drivers/spi/espi-amd-dev.c @@ -249,6 +249,43 @@ static int amd_espi_ioctl_set_channel_mode(struct amd_espi *amd_espi, unsigned l return ret; } +static int amd_espi_ioctl_set_freq(struct amd_espi *amd_espi, unsigned long arg) +{ + u32 ctrlr_config, slave_config; + struct config *config; + int ret; + + config = kzalloc(sizeof(*config), GFP_KERNEL); + if (!config) + return -ENOMEM; + + if (copy_from_user(config, (void __user *)arg, sizeof(struct config))) { + ret = -EFAULT; + goto set_freq_free; + } + + ctrlr_config = readl(ESPI_BASE + AMD_ESPI_SLAVE0_CONFIG_REG); + + ret = amd_espi_get_general_config(amd_espi, &slave_config); + if (ret != CB_SUCCESS) + goto set_freq_free; + + ret = amd_espi_set_freqmode(amd_espi, &slave_config, &ctrlr_config, config->op_freq); + if (ret != CB_SUCCESS) + goto set_freq_free; + + ret = amd_espi_set_config(amd_espi, slave_config, ESPI_SLAVE_GENERAL_CAPS_CFG); + if (ret != CB_SUCCESS) { + dev_err(amd_espi->dev, "Set operating frequency failed\n"); + goto set_freq_free; + } + writel(ctrlr_config, (ESPI_BASE + AMD_ESPI_SLAVE0_CONFIG_REG)); + +set_freq_free: + kfree(config); + return ret; +} + static long amd_espi_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) { struct amd_espi *amd_espi = filp->private_data; @@ -276,6 +313,9 @@ static long amd_espi_ioctl(struct file *filp, unsigned int cmd, unsigned long ar case ESPI_SET_CHAN_MODE: ret = amd_espi_ioctl_set_channel_mode(amd_espi, arg); break; + case ESPI_SET_FREQ: + ret = amd_espi_ioctl_set_freq(amd_espi, arg); + break; default: dev_err(amd_espi->dev, "ESPI command not found, returning error\n"); ret = -EINVAL; diff --git a/drivers/spi/espi-amd.h b/drivers/spi/espi-amd.h index 3774918d994f..e5760db7c1d3 100644 --- a/drivers/spi/espi-amd.h +++ b/drivers/spi/espi-amd.h @@ -145,6 +145,7 @@ #define ESPI_INBAND_RESET _IO(ESPI_MAGIC_NUMBER, 0x3) #define ESPI_SET_IO_MODE _IOW(ESPI_MAGIC_NUMBER, 0x4, struct config) #define ESPI_SET_CHAN_MODE _IOW(ESPI_MAGIC_NUMBER, 0x5, struct config) +#define ESPI_SET_FREQ _IOW(ESPI_MAGIC_NUMBER, 0x6, struct config) /* * enum amd_espi_versions - eSPI controller versions