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@@ -0,0 +1,61 @@
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+/* SPDX-License-Identifier: GPL-2.0+
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+ *
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+ * Copyright (c) 2018 Microchip Technology, Inc.
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+ *
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+ */
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+
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+#include <common.h>
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+#include <linux/err.h>
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+#include <dm.h>
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+#include <w1-eeprom.h>
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+#include <w1.h>
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+
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+#define W1_F2D_READ_EEPROM 0xf0
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+
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+#define EEP_SANDBOX_SAMPLE_MEM "this is a sample EEPROM memory string."
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+
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+static int eep_sandbox_read_buf(struct udevice *dev, unsigned int offset,
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+ u8 *buf, unsigned int count)
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+{
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+ /* do not allow to copy more than our maximum sample string */
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+ if (offset + count < strlen(EEP_SANDBOX_SAMPLE_MEM)) {
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+ offset = 0;
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+ count = strlen(EEP_SANDBOX_SAMPLE_MEM);
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+ }
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+ strncpy((char *)buf, EEP_SANDBOX_SAMPLE_MEM, count);
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+
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+ /*
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+ * in case the w1 subsystem uses some different kind of sandbox testing,
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+ * like randomized gpio values , we take the buffer from there
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+ */
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+
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+ w1_reset_select(dev);
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+
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+ w1_write_byte(dev, W1_F2D_READ_EEPROM);
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+ w1_write_byte(dev, offset & 0xff);
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+ w1_write_byte(dev, offset >> 8);
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+
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+ w1_read_buf(dev, buf, count);
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+
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+ /*
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+ * even if read buf from w1 fails, return success as we hardcoded
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+ * the buffer.
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+ */
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+ return 0;
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+}
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+
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+static const struct w1_eeprom_ops eep_sandbox_ops = {
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+ .read_buf = eep_sandbox_read_buf,
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+};
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+
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+static const struct udevice_id eep_sandbox_id[] = {
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+ { .compatible = "sandbox,w1-eeprom", .data = W1_FAMILY_EEP_SANDBOX },
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+ { },
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+};
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+
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+U_BOOT_DRIVER(eep_sandbox) = {
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+ .name = "eep_sandbox",
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+ .id = UCLASS_W1_EEPROM,
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+ .of_match = eep_sandbox_id,
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+ .ops = &eep_sandbox_ops,
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+};
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