diff options
Diffstat (limited to 'target/linux/generic/backport-5.15/819-v6.6-0009-nvmem-add-new-NXP-QorIQ-eFuse-driver.patch')
| -rw-r--r-- | target/linux/generic/backport-5.15/819-v6.6-0009-nvmem-add-new-NXP-QorIQ-eFuse-driver.patch | 133 |
1 files changed, 133 insertions, 0 deletions
diff --git a/target/linux/generic/backport-5.15/819-v6.6-0009-nvmem-add-new-NXP-QorIQ-eFuse-driver.patch b/target/linux/generic/backport-5.15/819-v6.6-0009-nvmem-add-new-NXP-QorIQ-eFuse-driver.patch new file mode 100644 index 0000000000..acbe18e270 --- /dev/null +++ b/target/linux/generic/backport-5.15/819-v6.6-0009-nvmem-add-new-NXP-QorIQ-eFuse-driver.patch @@ -0,0 +1,133 @@ +From c8efcf7a86ebf2ff48584d270b3070a7075bc345 Mon Sep 17 00:00:00 2001 +From: Richard Alpe <richard@bit42.se> +Date: Mon, 10 Apr 2023 10:20:51 +0200 +Subject: [PATCH] nvmem: add new NXP QorIQ eFuse driver +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +Add SFP (Security Fuse Processor) read support for NXP (Freescale) +QorIQ series SOC's. + +This patch adds support for the T1023 SOC using the SFP offset from +the existing T1023 device tree. In theory this should also work for +T1024, T1014 and T1013 which uses the same SFP base offset. + +Signed-off-by: Richard Alpe <richard@bit42.se> +Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se> +Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> +--- + drivers/nvmem/Kconfig | 12 ++++++ + drivers/nvmem/Makefile | 2 + + drivers/nvmem/qoriq-efuse.c | 78 +++++++++++++++++++++++++++++++++++++ + 3 files changed, 92 insertions(+) + create mode 100644 drivers/nvmem/qoriq-efuse.c + +--- a/drivers/nvmem/Kconfig ++++ b/drivers/nvmem/Kconfig +@@ -392,4 +392,16 @@ config NVMEM_ZYNQMP + + If sure, say yes. If unsure, say no. + ++config NVMEM_QORIQ_EFUSE ++ tristate "NXP QorIQ eFuse support" ++ depends on PPC_85xx || COMPILE_TEST ++ depends on HAS_IOMEM ++ help ++ This driver provides read support for the eFuses (SFP) on NXP QorIQ ++ series SoC's. This includes secure boot settings, the globally unique ++ NXP ID 'FUIDR' and the OEM unique ID 'OUIDR'. ++ ++ This driver can also be built as a module. If so, the module ++ will be called nvmem_qoriq_efuse. ++ + endif +--- a/drivers/nvmem/Makefile ++++ b/drivers/nvmem/Makefile +@@ -77,3 +77,5 @@ obj-$(CONFIG_NVMEM_VF610_OCOTP) += nvme + nvmem-vf610-ocotp-y := vf610-ocotp.o + obj-$(CONFIG_NVMEM_ZYNQMP) += nvmem_zynqmp_nvmem.o + nvmem_zynqmp_nvmem-y := zynqmp_nvmem.o ++obj-$(CONFIG_NVMEM_QORIQ_EFUSE) += nvmem-qoriq-efuse.o ++nvmem-qoriq-efuse-y := qoriq-efuse.o +--- /dev/null ++++ b/drivers/nvmem/qoriq-efuse.c +@@ -0,0 +1,78 @@ ++// SPDX-License-Identifier: GPL-2.0 ++/* ++ * Copyright (C) 2023 Westermo Network Technologies AB ++ */ ++ ++#include <linux/device.h> ++#include <linux/io.h> ++#include <linux/module.h> ++#include <linux/mod_devicetable.h> ++#include <linux/nvmem-provider.h> ++#include <linux/platform_device.h> ++ ++struct qoriq_efuse_priv { ++ void __iomem *base; ++}; ++ ++static int qoriq_efuse_read(void *context, unsigned int offset, void *val, ++ size_t bytes) ++{ ++ struct qoriq_efuse_priv *priv = context; ++ ++ /* .stride = 4 so offset is guaranteed to be aligned */ ++ __ioread32_copy(val, priv->base + offset, bytes / 4); ++ ++ /* Ignore trailing bytes (there shouldn't be any) */ ++ ++ return 0; ++} ++ ++static int qoriq_efuse_probe(struct platform_device *pdev) ++{ ++ struct nvmem_config config = { ++ .dev = &pdev->dev, ++ .read_only = true, ++ .reg_read = qoriq_efuse_read, ++ .stride = sizeof(u32), ++ .word_size = sizeof(u32), ++ .name = "qoriq_efuse_read", ++ .id = NVMEM_DEVID_AUTO, ++ .root_only = true, ++ }; ++ struct qoriq_efuse_priv *priv; ++ struct nvmem_device *nvmem; ++ struct resource *res; ++ ++ priv = devm_kzalloc(config.dev, sizeof(*priv), GFP_KERNEL); ++ if (!priv) ++ return -ENOMEM; ++ ++ priv->base = devm_platform_get_and_ioremap_resource(pdev, 0, &res); ++ if (IS_ERR(priv->base)) ++ return PTR_ERR(priv->base); ++ ++ config.size = resource_size(res); ++ config.priv = priv; ++ nvmem = devm_nvmem_register(config.dev, &config); ++ ++ return PTR_ERR_OR_ZERO(nvmem); ++} ++ ++static const struct of_device_id qoriq_efuse_of_match[] = { ++ { .compatible = "fsl,t1023-sfp", }, ++ {/* sentinel */}, ++}; ++MODULE_DEVICE_TABLE(of, qoriq_efuse_of_match); ++ ++static struct platform_driver qoriq_efuse_driver = { ++ .probe = qoriq_efuse_probe, ++ .driver = { ++ .name = "qoriq-efuse", ++ .of_match_table = qoriq_efuse_of_match, ++ }, ++}; ++module_platform_driver(qoriq_efuse_driver); ++ ++MODULE_AUTHOR("Richard Alpe <richard.alpe@bit42.se>"); ++MODULE_DESCRIPTION("NXP QorIQ Security Fuse Processor (SFP) Reader"); ++MODULE_LICENSE("GPL"); |