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X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 19 Oct 2023 06:07:34.5954 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 761ad36e-31a0-46f2-c1a5-08dbd069b00d 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: DS3PEPF000099D6.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: PH7PR12MB8593 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Add zynqmp_pm_efuse_access API in the ZynqMP firmware for read/write access of efuse memory. Signed-off-by: Praveen Teja Kundanala --- drivers/firmware/xilinx/zynqmp.c | 25 +++++++++++++++++++++++++ include/linux/firmware/xlnx-zynqmp.h | 8 ++++++++ 2 files changed, 33 insertions(+) diff --git a/drivers/firmware/xilinx/zynqmp.c b/drivers/firmware/xilinx/zyn= qmp.c index 4cc1ac7f76ed..5a4f7256b9e7 100644 --- a/drivers/firmware/xilinx/zynqmp.c +++ b/drivers/firmware/xilinx/zynqmp.c @@ -3,6 +3,7 @@ * Xilinx Zynq MPSoC Firmware layer * * Copyright (C) 2014-2022 Xilinx, Inc. + * Copyright (C), 2022 - 2023 Advanced Micro Devices, Inc. * * Michal Simek * Davorin Mista @@ -1435,6 +1436,30 @@ int zynqmp_pm_aes_engine(const u64 address, u32 *out) } EXPORT_SYMBOL_GPL(zynqmp_pm_aes_engine); =20 +/** + * zynqmp_pm_efuse_access - Provides access to efuse memory. + * @address: Address of the efuse params structure + * @out: Returned output value + * + * Return: Returns status, either success or error code. + */ +int zynqmp_pm_efuse_access(const u64 address, u32 *out) +{ + u32 ret_payload[PAYLOAD_ARG_CNT]; + int ret; + + if (!out) + return -EINVAL; + + ret =3D zynqmp_pm_invoke_fn(PM_EFUSE_ACCESS, upper_32_bits(address), + lower_32_bits(address), 0, 0, + ret_payload); + *out =3D ret_payload[1]; + + return ret; +} +EXPORT_SYMBOL_GPL(zynqmp_pm_efuse_access); + /** * zynqmp_pm_sha_hash - Access the SHA engine to calculate the hash * @address: Address of the data/ Address of output buffer where diff --git a/include/linux/firmware/xlnx-zynqmp.h b/include/linux/firmware/= xlnx-zynqmp.h index e8b12ec8b060..4f574fab74eb 100644 --- a/include/linux/firmware/xlnx-zynqmp.h +++ b/include/linux/firmware/xlnx-zynqmp.h @@ -3,6 +3,7 @@ * Xilinx Zynq MPSoC Firmware layer * * Copyright (C) 2014-2021 Xilinx + * Copyright (C), 2022 - 2023 Advanced Micro Devices, Inc. * * Michal Simek * Davorin Mista @@ -143,6 +144,7 @@ enum pm_api_id { PM_CLOCK_GETPARENT =3D 44, PM_FPGA_READ =3D 46, PM_SECURE_AES =3D 47, + PM_EFUSE_ACCESS =3D 53, PM_FEATURE_CHECK =3D 63, }; =20 @@ -534,6 +536,7 @@ int zynqmp_pm_set_requirement(const u32 node, const u32= capabilities, const u32 qos, const enum zynqmp_pm_request_ack ack); int zynqmp_pm_aes_engine(const u64 address, u32 *out); +int zynqmp_pm_efuse_access(const u64 address, u32 *out); int zynqmp_pm_sha_hash(const u64 address, const u32 size, const u32 flags); int zynqmp_pm_fpga_load(const u64 address, const u32 size, const u32 flags= ); int zynqmp_pm_fpga_get_status(u32 *value); @@ -727,6 +730,11 @@ static inline int zynqmp_pm_aes_engine(const u64 addre= ss, u32 *out) return -ENODEV; } =20 +static inline int zynqmp_pm_efuse_access(const u64 address, u32 *out) +{ + return -ENODEV; +} + static inline int zynqmp_pm_sha_hash(const u64 address, const u32 size, const u32 flags) { --=20 2.36.1 From nobody Thu Jan 1 20:14:27 2026 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id C02E8CDB465 for ; Thu, 19 Oct 2023 06:07:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1344692AbjJSGHw (ORCPT ); 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X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 19 Oct 2023 06:07:36.6096 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 9f57b66c-e0d3-40dc-7a28-08dbd069b143 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=[SATLEXMB03.amd.com] X-MS-Exchange-CrossTenant-AuthSource: CY4PEPF0000EDD0.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SA1PR12MB7197 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Convert the xlnx,zynqmp-nvmem.txt to yaml. Signed-off-by: Praveen Teja Kundanala --- .../bindings/nvmem/xlnx,zynqmp-nvmem.txt | 46 ------------------- .../bindings/nvmem/xlnx,zynqmp-nvmem.yaml | 40 ++++++++++++++++ 2 files changed, 40 insertions(+), 46 deletions(-) delete mode 100644 Documentation/devicetree/bindings/nvmem/xlnx,zynqmp-nvm= em.txt create mode 100644 Documentation/devicetree/bindings/nvmem/xlnx,zynqmp-nvm= em.yaml diff --git a/Documentation/devicetree/bindings/nvmem/xlnx,zynqmp-nvmem.txt = b/Documentation/devicetree/bindings/nvmem/xlnx,zynqmp-nvmem.txt deleted file mode 100644 index 4881561b3a02..000000000000 --- a/Documentation/devicetree/bindings/nvmem/xlnx,zynqmp-nvmem.txt +++ /dev/null @@ -1,46 +0,0 @@ --------------------------------------------------------------------------- -=3D Zynq UltraScale+ MPSoC nvmem firmware driver binding =3D --------------------------------------------------------------------------- -The nvmem_firmware node provides access to the hardware related data -like soc revision, IDCODE... etc, By using the firmware interface. - -Required properties: -- compatible: should be "xlnx,zynqmp-nvmem-fw" - -=3D Data cells =3D -Are child nodes of silicon id, bindings of which as described in -bindings/nvmem/nvmem.txt - -------- - Example -------- -firmware { - zynqmp_firmware: zynqmp-firmware { - compatible =3D "xlnx,zynqmp-firmware"; - method =3D "smc"; - - nvmem_firmware { - compatible =3D "xlnx,zynqmp-nvmem-fw"; - #address-cells =3D <1>; - #size-cells =3D <1>; - - /* Data cells */ - soc_revision: soc_revision { - reg =3D <0x0 0x4>; - }; - }; - }; -}; - -=3D Data consumers =3D -Are device nodes which consume nvmem data cells. - -For example: - pcap { - ... - - nvmem-cells =3D <&soc_revision>; - nvmem-cell-names =3D "soc_revision"; - - ... - }; diff --git a/Documentation/devicetree/bindings/nvmem/xlnx,zynqmp-nvmem.yaml= b/Documentation/devicetree/bindings/nvmem/xlnx,zynqmp-nvmem.yaml new file mode 100644 index 000000000000..5d20362a0615 --- /dev/null +++ b/Documentation/devicetree/bindings/nvmem/xlnx,zynqmp-nvmem.yaml @@ -0,0 +1,40 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/nvmem/xlnx,zynqmp-nvmem.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Zynq UltraScale+ MPSoC Non Volatile Memory interface + +description: | + The ZynqMP MPSoC provides access to the hardware related data + like SOC revision, IDCODE and specific purpose efuses. + +maintainers: + - Kalyani Akula + - Praveen Teja Kundanala + +allOf: + - $ref: nvmem.yaml# + +properties: + compatible: + const: xlnx,zynqmp-nvmem-fw + +required: + - compatible + +unevaluatedProperties: false + +examples: + - | + nvmem-firmware { + compatible =3D "xlnx,zynqmp-nvmem-fw"; + #address-cells =3D <1>; + #size-cells =3D <1>; + + /* Data cells */ + soc_revision: soc-revision@0 { + reg =3D <0x0 0x4>; + }; + }; --=20 2.36.1 From nobody Thu Jan 1 20:14:27 2026 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id A27A2CDB483 for ; Thu, 19 Oct 2023 06:08:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232771AbjJSGIA (ORCPT ); Thu, 19 Oct 2023 02:08:00 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35372 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232712AbjJSGHx (ORCPT ); Thu, 19 Oct 2023 02:07:53 -0400 Received: from NAM04-BN8-obe.outbound.protection.outlook.com (mail-bn8nam04on2049.outbound.protection.outlook.com [40.107.100.49]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8A3C0199; 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X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 19 Oct 2023 06:07:38.7658 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 52ac8ba2-80bf-4a2c-1cdf-08dbd069b28a 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=[SATLEXMB03.amd.com] X-MS-Exchange-CrossTenant-AuthSource: CY4PEPF0000EDD0.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: PH8PR12MB6794 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Add nvmem DT nodes for ZynqMP SOC Signed-off-by: Praveen Teja Kundanala --- arch/arm64/boot/dts/xilinx/zynqmp.dtsi | 59 +++++++++++++++++++++++++- 1 file changed, 57 insertions(+), 2 deletions(-) diff --git a/arch/arm64/boot/dts/xilinx/zynqmp.dtsi b/arch/arm64/boot/dts/x= ilinx/zynqmp.dtsi index b61fc99cd911..b7433e6b9d6c 100644 --- a/arch/arm64/boot/dts/xilinx/zynqmp.dtsi +++ b/arch/arm64/boot/dts/xilinx/zynqmp.dtsi @@ -194,14 +194,69 @@ zynqmp_power: zynqmp-power { mbox-names =3D "tx", "rx"; }; =20 - nvmem_firmware { + nvmem-firmware { compatible =3D "xlnx,zynqmp-nvmem-fw"; #address-cells =3D <1>; #size-cells =3D <1>; =20 - soc_revision: soc_revision@0 { + soc_revision: soc-revision@0 { reg =3D <0x0 0x4>; }; + /* efuse access */ + efuse_dna: efuse-dna@c { + reg =3D <0xc 0xc>; + }; + efuse_usr0: efuse-usr0@20 { + reg =3D <0x20 0x4>; + }; + efuse_usr1: efuse-usr1@24 { + reg =3D <0x24 0x4>; + }; + efuse_usr2: efuse-usr2@28 { + reg =3D <0x28 0x4>; + }; + efuse_usr3: efuse-usr3@2c { + reg =3D <0x2c 0x4>; + }; + efuse_usr4: efuse-usr4@30 { + reg =3D <0x30 0x4>; + }; + efuse_usr5: efuse-usr5@34 { + reg =3D <0x34 0x4>; + }; + efuse_usr6: efuse-usr6@38 { + reg =3D <0x38 0x4>; + }; + efuse_usr7: efuse-usr7@3c { + reg =3D <0x3c 0x4>; + }; + efuse_miscusr: efuse-miscusr@40 { + reg =3D <0x40 0x4>; + }; + efuse_chash: efuse-chash@50 { + reg =3D <0x50 0x4>; + }; + efuse_pufmisc: efuse-pufmisc@54 { + reg =3D <0x54 0x4>; + }; + efuse_sec: efuse-sec@58 { + reg =3D <0x58 0x4>; + }; + efuse_spkid: efuse-spkid@5c { + reg =3D <0x5c 0x4>; + }; + efuse_aeskey: efuse-aeskey@60 { + reg =3D <0x60 0x20>; + }; + efuse_ppk0hash: efuse-ppk0hash@a0 { + reg =3D <0xa0 0x30>; + }; + efuse_ppk1hash: efuse-ppk1hash@d0 { + reg =3D <0xd0 0x30>; + }; + efuse_pufuser: efuse-pufuser@100 { + reg =3D <0x100 0x7F>; + }; }; =20 zynqmp_pcap: pcap { --=20 2.36.1 From nobody Thu Jan 1 20:14:28 2026 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id DE64DCDB465 for ; Thu, 19 Oct 2023 06:07:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232666AbjJSGHk (ORCPT ); Thu, 19 Oct 2023 02:07:40 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38236 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232670AbjJSGHh (ORCPT ); Thu, 19 Oct 2023 02:07:37 -0400 Received: from NAM11-CO1-obe.outbound.protection.outlook.com (mail-co1nam11on2077.outbound.protection.outlook.com [40.107.220.77]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3863612F; 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X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 19 Oct 2023 06:07:31.0627 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 6f76ae6e-c629-4ea1-1625-08dbd069adf5 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=[SATLEXMB03.amd.com] X-MS-Exchange-CrossTenant-AuthSource: CY4PEPF0000EDD0.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: LV3PR12MB9234 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Add support to read/write efuse memory map of ZynqMP Below are the offsets of ZynqMP efuse memory map 0 - SOC version(read only) 0xC - 0xFC -ZynqMP specific purpose efuses 0x100 - 0x17F - Physical Unclonable Function(PUF) efuses repurposed as user efuses Signed-off-by: Praveen Teja Kundanala --- drivers/nvmem/zynqmp_nvmem.c | 218 ++++++++++++++++++++++++++++++----- 1 file changed, 186 insertions(+), 32 deletions(-) diff --git a/drivers/nvmem/zynqmp_nvmem.c b/drivers/nvmem/zynqmp_nvmem.c index 7f15aa89a9d0..a3bb8c3a831b 100644 --- a/drivers/nvmem/zynqmp_nvmem.c +++ b/drivers/nvmem/zynqmp_nvmem.c @@ -1,8 +1,10 @@ // SPDX-License-Identifier: GPL-2.0+ /* * Copyright (C) 2019 Xilinx, Inc. + * Copyright (C), 2022 - 2023 Advanced Micro Devices, Inc. */ =20 +#include #include #include #include @@ -10,36 +12,190 @@ #include =20 #define SILICON_REVISION_MASK 0xF +#define P_USER_0_64_UPPER_MASK GENMASK(31, 16) +#define P_USER_127_LOWER_4_BIT_MASK GENMASK(3, 0) +#define WORD_INBYTES 4 +#define SOC_VER_SIZE 0x4 +#define EFUSE_MEMORY_SIZE 0x177 +#define UNUSED_SPACE 0x8 +#define ZYNQMP_NVMEM_SIZE (SOC_VER_SIZE + UNUSED_SPACE + \ + EFUSE_MEMORY_SIZE) +#define SOC_VERSION_OFFSET 0x0 +#define EFUSE_START_OFFSET 0xC +#define EFUSE_END_OFFSET 0xFC +#define EFUSE_PUF_START_OFFSET 0x100 +#define EFUSE_PUF_MID_OFFSET 0x140 +#define EFUSE_PUF_END_OFFSET 0x17F +#define EFUSE_NOT_ENABLED 29 =20 -struct zynqmp_nvmem_data { - struct device *dev; - struct nvmem_device *nvmem; +/* + * efuse access type + */ +enum efuse_access { + EFUSE_READ =3D 0, + EFUSE_WRITE +}; + +/** + * struct xilinx_efuse - the basic structure + * @src: address of the buffer to store the data to be write/read + * @size: read/write word count + * @offset: read/write offset + * @flag: 0 - represents efuse read and 1- represents efuse write + * @pufuserfuse:0 - represents non-puf efuses, offset is used for read/wri= te + * 1 - represents puf user fuse row number. + * + * this structure stores all the required details to + * read/write efuse memory. + */ +struct xilinx_efuse { + u64 src; + u32 size; + u32 offset; + enum efuse_access flag; + u32 pufuserfuse; }; =20 -static int zynqmp_nvmem_read(void *context, unsigned int offset, - void *val, size_t bytes) +static int zynqmp_efuse_access(void *context, unsigned int offset, + void *val, size_t bytes, enum efuse_access flag, + unsigned int pufflag) { + struct device *dev =3D context; + struct xilinx_efuse *efuse; + dma_addr_t dma_addr; + dma_addr_t dma_buf; + size_t words =3D bytes / WORD_INBYTES; int ret; - int idcode, version; - struct zynqmp_nvmem_data *priv =3D context; - - ret =3D zynqmp_pm_get_chipid(&idcode, &version); - if (ret < 0) - return ret; + int value; + char *data; + + if (bytes % WORD_INBYTES !=3D 0) { + dev_err(dev, "Bytes requested should be word aligned\n"); + return -EOPNOTSUPP; + } + + if (pufflag =3D=3D 0 && offset % WORD_INBYTES) { + dev_err(dev, "Offset requested should be word aligned\n"); + return -EOPNOTSUPP; + } + + if (pufflag =3D=3D 1 && flag =3D=3D EFUSE_WRITE) { + memcpy(&value, val, bytes); + if ((offset =3D=3D EFUSE_PUF_START_OFFSET || + offset =3D=3D EFUSE_PUF_MID_OFFSET) && + value & P_USER_0_64_UPPER_MASK) { + dev_err(dev, "Only lower 4 bytes are allowed to be programmed in P_USER= _0 & P_USER_64\n"); + return -EOPNOTSUPP; + } + + if (offset =3D=3D EFUSE_PUF_END_OFFSET && + (value & P_USER_127_LOWER_4_BIT_MASK)) { + dev_err(dev, "Only MSB 28 bits are allowed to be programmed for P_USER_= 127\n"); + return -EOPNOTSUPP; + } + } + + efuse =3D dma_alloc_coherent(dev, sizeof(struct xilinx_efuse), + &dma_addr, GFP_KERNEL); + if (!efuse) + return -ENOMEM; =20 - dev_dbg(priv->dev, "Read chipid val %x %x\n", idcode, version); - *(int *)val =3D version & SILICON_REVISION_MASK; + data =3D dma_alloc_coherent(dev, sizeof(bytes), + &dma_buf, GFP_KERNEL); + if (!data) { + ret =3D -ENOMEM; + goto efuse_data_fail; + } + + if (flag =3D=3D EFUSE_WRITE) { + memcpy(data, val, bytes); + efuse->flag =3D EFUSE_WRITE; + } else { + efuse->flag =3D EFUSE_READ; + } + + efuse->src =3D dma_buf; + efuse->size =3D words; + efuse->offset =3D offset; + efuse->pufuserfuse =3D pufflag; + + zynqmp_pm_efuse_access(dma_addr, (u32 *)&ret); + if (ret !=3D 0) { + if (ret =3D=3D EFUSE_NOT_ENABLED) { + dev_err(dev, "efuse access is not enabled\n"); + ret =3D -EOPNOTSUPP; + } else { + dev_err(dev, "Error in efuse read %x\n", ret); + ret =3D -EPERM; + } + goto efuse_access_err; + } + + if (flag =3D=3D EFUSE_READ) + memcpy(val, data, bytes); +efuse_access_err: + dma_free_coherent(dev, sizeof(bytes), + data, dma_buf); +efuse_data_fail: + dma_free_coherent(dev, sizeof(struct xilinx_efuse), + efuse, dma_addr); + + return ret; +} =20 - return 0; +static int zynqmp_nvmem_read(void *context, unsigned int offset, void *val= , size_t bytes) +{ + struct device *dev =3D context; + int ret; + int pufflag =3D 0; + int idcode; + int version; + + if (offset >=3D EFUSE_PUF_START_OFFSET && offset <=3D EFUSE_PUF_END_OFFSE= T) + pufflag =3D 1; + + switch (offset) { + /* Soc version offset is zero */ + case SOC_VERSION_OFFSET: + if (bytes !=3D SOC_VER_SIZE) + return -EOPNOTSUPP; + + ret =3D zynqmp_pm_get_chipid((u32 *)&idcode, (u32 *)&version); + if (ret < 0) + return ret; + + dev_dbg(dev, "Read chipid val %x %x\n", idcode, version); + *(int *)val =3D version & SILICON_REVISION_MASK; + break; + /* Efuse offset starts from 0xc */ + case EFUSE_START_OFFSET ... EFUSE_END_OFFSET: + case EFUSE_PUF_START_OFFSET ... EFUSE_PUF_END_OFFSET: + ret =3D zynqmp_efuse_access(context, offset, val, + bytes, EFUSE_READ, pufflag); + break; + default: + *(u32 *)val =3D 0xDEADBEEF; + ret =3D 0; + break; + } + + return ret; } =20 -static struct nvmem_config econfig =3D { - .name =3D "zynqmp-nvmem", - .owner =3D THIS_MODULE, - .word_size =3D 1, - .size =3D 1, - .read_only =3D true, -}; +static int zynqmp_nvmem_write(void *context, + unsigned int offset, void *val, size_t bytes) +{ + int pufflag =3D 0; + + if (offset < EFUSE_START_OFFSET || offset > EFUSE_PUF_END_OFFSET) + return -EOPNOTSUPP; + + if (offset >=3D EFUSE_PUF_START_OFFSET && offset <=3D EFUSE_PUF_END_OFFSE= T) + pufflag =3D 1; + + return zynqmp_efuse_access(context, offset, + val, bytes, EFUSE_WRITE, pufflag); +} =20 static const struct of_device_id zynqmp_nvmem_match[] =3D { { .compatible =3D "xlnx,zynqmp-nvmem-fw", }, @@ -50,21 +206,19 @@ MODULE_DEVICE_TABLE(of, zynqmp_nvmem_match); static int zynqmp_nvmem_probe(struct platform_device *pdev) { struct device *dev =3D &pdev->dev; - struct zynqmp_nvmem_data *priv; - - priv =3D devm_kzalloc(dev, sizeof(struct zynqmp_nvmem_data), GFP_KERNEL); - if (!priv) - return -ENOMEM; + struct nvmem_config econfig =3D {}; =20 - priv->dev =3D dev; + econfig.name =3D "zynqmp-nvmem"; + econfig.owner =3D THIS_MODULE; + econfig.word_size =3D 1; + econfig.size =3D ZYNQMP_NVMEM_SIZE; econfig.dev =3D dev; econfig.add_legacy_fixed_of_cells =3D true; + econfig.priv =3D dev; econfig.reg_read =3D zynqmp_nvmem_read; - econfig.priv =3D priv; - - priv->nvmem =3D devm_nvmem_register(dev, &econfig); + econfig.reg_write =3D zynqmp_nvmem_write; =20 - return PTR_ERR_OR_ZERO(priv->nvmem); + return PTR_ERR_OR_ZERO(devm_nvmem_register(dev, &econfig)); } =20 static struct platform_driver zynqmp_nvmem_driver =3D { @@ -77,6 +231,6 @@ static struct platform_driver zynqmp_nvmem_driver =3D { =20 module_platform_driver(zynqmp_nvmem_driver); =20 -MODULE_AUTHOR("Michal Simek , Nava kishore Manne "); +MODULE_AUTHOR("Kalyani Akula , Praveen Teja Kundana= la "); 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X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 19 Oct 2023 06:07:36.5623 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 6647c2ec-62e8-4154-7ee1-08dbd069b137 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: DS3PEPF000099D7.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: LV2PR12MB5798 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Add maintainers for ZynqMP NVMEM driver and driver document. Signed-off-by: Praveen Teja Kundanala --- MAINTAINERS | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/MAINTAINERS b/MAINTAINERS index 90f13281d297..c3370a8a7709 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -23765,6 +23765,14 @@ M: Harsha S: Maintained F: drivers/crypto/xilinx/zynqmp-sha.c =20 +XILINX ZYNQMP NVMEM DRIVER +M: Praveen Teja Kundanala +M: Kalyani Akula +R: Michal Simek +S: Maintained +F: Documentation/devicetree/bindings/nvmem/xlnx,zynqmp-nvmem.yaml +F: drivers/nvmem/zynqmp_nvmem.c + XILLYBUS DRIVER M: Eli Billauer L: linux-kernel@vger.kernel.org --=20 2.36.1