mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-23 15:32:33 +00:00
134 lines
3.9 KiB
Diff
134 lines
3.9 KiB
Diff
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");
|