v4.19.13 snapshot.
diff --git a/drivers/nvmem/meson-efuse.c b/drivers/nvmem/meson-efuse.c
new file mode 100644
index 0000000..d769840
--- /dev/null
+++ b/drivers/nvmem/meson-efuse.c
@@ -0,0 +1,83 @@
+/*
+ * Amlogic Meson GX eFuse Driver
+ *
+ * Copyright (c) 2016 Endless Computers, Inc.
+ * Author: Carlo Caione <carlo@endlessm.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ */
+
+#include <linux/module.h>
+#include <linux/nvmem-provider.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+
+#include <linux/firmware/meson/meson_sm.h>
+
+static int meson_efuse_read(void *context, unsigned int offset,
+ void *val, size_t bytes)
+{
+ return meson_sm_call_read((u8 *)val, bytes, SM_EFUSE_READ, offset,
+ bytes, 0, 0, 0);
+}
+
+static int meson_efuse_write(void *context, unsigned int offset,
+ void *val, size_t bytes)
+{
+ return meson_sm_call_write((u8 *)val, bytes, SM_EFUSE_WRITE, offset,
+ bytes, 0, 0, 0);
+}
+
+static const struct of_device_id meson_efuse_match[] = {
+ { .compatible = "amlogic,meson-gxbb-efuse", },
+ { /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(of, meson_efuse_match);
+
+static int meson_efuse_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct nvmem_device *nvmem;
+ struct nvmem_config *econfig;
+ unsigned int size;
+
+ if (meson_sm_call(SM_EFUSE_USER_MAX, &size, 0, 0, 0, 0, 0) < 0)
+ return -EINVAL;
+
+ econfig = devm_kzalloc(dev, sizeof(*econfig), GFP_KERNEL);
+ if (!econfig)
+ return -ENOMEM;
+
+ econfig->dev = dev;
+ econfig->name = dev_name(dev);
+ econfig->stride = 1;
+ econfig->word_size = 1;
+ econfig->reg_read = meson_efuse_read;
+ econfig->reg_write = meson_efuse_write;
+ econfig->size = size;
+
+ nvmem = devm_nvmem_register(&pdev->dev, econfig);
+
+ return PTR_ERR_OR_ZERO(nvmem);
+}
+
+static struct platform_driver meson_efuse_driver = {
+ .probe = meson_efuse_probe,
+ .driver = {
+ .name = "meson-efuse",
+ .of_match_table = meson_efuse_match,
+ },
+};
+
+module_platform_driver(meson_efuse_driver);
+
+MODULE_AUTHOR("Carlo Caione <carlo@endlessm.com>");
+MODULE_DESCRIPTION("Amlogic Meson GX NVMEM driver");
+MODULE_LICENSE("GPL v2");