1 files changed, 62 insertions, 0 deletions
diff --git a/roms/u-boot/drivers/w1-eeprom/ds24xxx.c b/roms/u-boot/drivers/w1-eeprom/ds24xxx.c
new file mode 100644
index 000000000..4be378b43
--- /dev/null
+++ b/roms/u-boot/drivers/w1-eeprom/ds24xxx.c
@@ -0,0 +1,62 @@
+// SPDX-License-Identifier:	GPL-2.0+
+/*
+ *
+ * Copyright (c) 2015 Free Electrons
+ * Copyright (c) 2015 NextThing Co
+ * Copyright (c) 2018 Microchip Technology, Inc.
+ *
+ */
+
+#include <common.h>
+#include <linux/err.h>
+#include <dm.h>
+#include <w1-eeprom.h>
+#include <w1.h>
+
+#define W1_F2D_READ_EEPROM	0xf0
+
+static int ds24xxx_read_buf(struct udevice *dev, unsigned int offset,
+			    u8 *buf, unsigned int count)
+{
+	w1_reset_select(dev);
+
+	w1_write_byte(dev, W1_F2D_READ_EEPROM);
+	w1_write_byte(dev, offset & 0xff);
+	w1_write_byte(dev, offset >> 8);
+
+	return w1_read_buf(dev, buf, count);
+}
+
+static int ds24xxx_probe(struct udevice *dev)
+{
+	struct w1_device *w1;
+
+	w1 = dev_get_parent_plat(dev);
+	w1->id = 0;
+	return 0;
+}
+
+static const struct w1_eeprom_ops ds24xxx_ops = {
+	.read_buf	= ds24xxx_read_buf,
+};
+
+static const struct udevice_id ds24xxx_id[] = {
+	{ .compatible = "maxim,ds24b33", .data = W1_FAMILY_DS24B33 },
+	{ .compatible = "maxim,ds2431", .data = W1_FAMILY_DS2431 },
+	{ },
+};
+
+U_BOOT_DRIVER(ds24xxx) = {
+	.name		= "ds24xxx",
+	.id		= UCLASS_W1_EEPROM,
+	.of_match	= ds24xxx_id,
+	.ops		= &ds24xxx_ops,
+	.probe		= ds24xxx_probe,
+};
+
+u8 family_supported[] = {
+	W1_FAMILY_DS24B33,
+	W1_FAMILY_DS2431,
+};
+
+U_BOOT_W1_DEVICE(ds24xxx, family_supported);