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author | Rafał Miłecki <rafal@milecki.pl> | 2023-01-06 19:37:37 +0100 |
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committer | Rafał Miłecki <rafal@milecki.pl> | 2023-01-06 22:08:03 +0100 |
commit | 8dfe69cdfc5c943f946faa873ff330b47125011d (patch) | |
tree | a68e869e00bcadec6c32252916e1a0fc5e18c51d /target/linux/generic/backport-5.15/804-v5.18-0007-nvmem-add-driver-for-Layerscape-SFP-Security-Fuse-Pr.patch | |
parent | d3e89e69c52115d1c02f5c16a4aa6b721e003578 (diff) | |
download | upstream-8dfe69cdfc5c943f946faa873ff330b47125011d.tar.gz upstream-8dfe69cdfc5c943f946faa873ff330b47125011d.tar.bz2 upstream-8dfe69cdfc5c943f946faa873ff330b47125011d.zip |
kernel: update nvmem subsystem to the latest upstream
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Diffstat (limited to 'target/linux/generic/backport-5.15/804-v5.18-0007-nvmem-add-driver-for-Layerscape-SFP-Security-Fuse-Pr.patch')
-rw-r--r-- | target/linux/generic/backport-5.15/804-v5.18-0007-nvmem-add-driver-for-Layerscape-SFP-Security-Fuse-Pr.patch | 139 |
1 files changed, 139 insertions, 0 deletions
diff --git a/target/linux/generic/backport-5.15/804-v5.18-0007-nvmem-add-driver-for-Layerscape-SFP-Security-Fuse-Pr.patch b/target/linux/generic/backport-5.15/804-v5.18-0007-nvmem-add-driver-for-Layerscape-SFP-Security-Fuse-Pr.patch new file mode 100644 index 0000000000..6afb68b3f9 --- /dev/null +++ b/target/linux/generic/backport-5.15/804-v5.18-0007-nvmem-add-driver-for-Layerscape-SFP-Security-Fuse-Pr.patch @@ -0,0 +1,139 @@ +From f78451012b9e159afdba31c3eb69f223a9f42adc Mon Sep 17 00:00:00 2001 +From: Michael Walle <michael@walle.cc> +Date: Sun, 20 Feb 2022 15:15:23 +0000 +Subject: [PATCH] nvmem: add driver for Layerscape SFP (Security Fuse + Processor) + +Add support for the Security Fuse Processor found on Layerscape SoCs. +This driver implements basic read access. + +Signed-off-by: Michael Walle <michael@walle.cc> +Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> +Link: https://lore.kernel.org/r/20220220151527.17216-10-srinivas.kandagatla@linaro.org +Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> +--- + drivers/nvmem/Kconfig | 12 +++++ + drivers/nvmem/Makefile | 2 + + drivers/nvmem/layerscape-sfp.c | 89 ++++++++++++++++++++++++++++++++++ + 3 files changed, 103 insertions(+) + create mode 100644 drivers/nvmem/layerscape-sfp.c + +--- a/drivers/nvmem/Kconfig ++++ b/drivers/nvmem/Kconfig +@@ -300,4 +300,16 @@ config NVMEM_BRCM_NVRAM + This driver provides support for Broadcom's NVRAM that can be accessed + using I/O mapping. + ++config NVMEM_LAYERSCAPE_SFP ++ tristate "Layerscape SFP (Security Fuse Processor) support" ++ depends on ARCH_LAYERSCAPE || COMPILE_TEST ++ depends on HAS_IOMEM ++ help ++ This driver provides support to read the eFuses on Freescale ++ Layerscape SoC's. For example, the vendor provides a per part ++ unique ID there. ++ ++ This driver can also be built as a module. If so, the module ++ will be called layerscape-sfp. ++ + endif +--- a/drivers/nvmem/Makefile ++++ b/drivers/nvmem/Makefile +@@ -61,3 +61,5 @@ obj-$(CONFIG_NVMEM_RMEM) += nvmem-rmem. + nvmem-rmem-y := rmem.o + obj-$(CONFIG_NVMEM_BRCM_NVRAM) += nvmem_brcm_nvram.o + nvmem_brcm_nvram-y := brcm_nvram.o ++obj-$(CONFIG_NVMEM_LAYERSCAPE_SFP) += nvmem-layerscape-sfp.o ++nvmem-layerscape-sfp-y := layerscape-sfp.o +--- /dev/null ++++ b/drivers/nvmem/layerscape-sfp.c +@@ -0,0 +1,89 @@ ++// SPDX-License-Identifier: GPL-2.0-only ++/* ++ * Layerscape SFP driver ++ * ++ * Copyright (c) 2022 Michael Walle <michael@walle.cc> ++ * ++ */ ++ ++#include <linux/device.h> ++#include <linux/io.h> ++#include <linux/mod_devicetable.h> ++#include <linux/module.h> ++#include <linux/nvmem-provider.h> ++#include <linux/platform_device.h> ++#include <linux/property.h> ++ ++#define LAYERSCAPE_SFP_OTP_OFFSET 0x0200 ++ ++struct layerscape_sfp_priv { ++ void __iomem *base; ++}; ++ ++struct layerscape_sfp_data { ++ int size; ++}; ++ ++static int layerscape_sfp_read(void *context, unsigned int offset, void *val, ++ size_t bytes) ++{ ++ struct layerscape_sfp_priv *priv = context; ++ ++ memcpy_fromio(val, priv->base + LAYERSCAPE_SFP_OTP_OFFSET + offset, ++ bytes); ++ ++ return 0; ++} ++ ++static struct nvmem_config layerscape_sfp_nvmem_config = { ++ .name = "fsl-sfp", ++ .reg_read = layerscape_sfp_read, ++}; ++ ++static int layerscape_sfp_probe(struct platform_device *pdev) ++{ ++ const struct layerscape_sfp_data *data; ++ struct layerscape_sfp_priv *priv; ++ struct nvmem_device *nvmem; ++ ++ priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); ++ if (!priv) ++ return -ENOMEM; ++ ++ priv->base = devm_platform_ioremap_resource(pdev, 0); ++ if (IS_ERR(priv->base)) ++ return PTR_ERR(priv->base); ++ ++ data = device_get_match_data(&pdev->dev); ++ ++ layerscape_sfp_nvmem_config.size = data->size; ++ layerscape_sfp_nvmem_config.dev = &pdev->dev; ++ layerscape_sfp_nvmem_config.priv = priv; ++ ++ nvmem = devm_nvmem_register(&pdev->dev, &layerscape_sfp_nvmem_config); ++ ++ return PTR_ERR_OR_ZERO(nvmem); ++} ++ ++static const struct layerscape_sfp_data ls1028a_data = { ++ .size = 0x88, ++}; ++ ++static const struct of_device_id layerscape_sfp_dt_ids[] = { ++ { .compatible = "fsl,ls1028a-sfp", .data = &ls1028a_data }, ++ {}, ++}; ++MODULE_DEVICE_TABLE(of, layerscape_sfp_dt_ids); ++ ++static struct platform_driver layerscape_sfp_driver = { ++ .probe = layerscape_sfp_probe, ++ .driver = { ++ .name = "layerscape_sfp", ++ .of_match_table = layerscape_sfp_dt_ids, ++ }, ++}; ++module_platform_driver(layerscape_sfp_driver); ++ ++MODULE_AUTHOR("Michael Walle <michael@walle.cc>"); ++MODULE_DESCRIPTION("Layerscape Security Fuse Processor driver"); ++MODULE_LICENSE("GPL"); |