1 files changed, 108 insertions, 0 deletions
diff --git a/drivers/i2c/i2c-uclass-compat.c b/drivers/i2c/i2c-uclass-compat.c
new file mode 100644
index 0000000000..223f238f4b
--- /dev/null
+++ b/drivers/i2c/i2c-uclass-compat.c
@@ -0,0 +1,108 @@
+/*
+ * Copyright (c) 2014 Google, Inc
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <errno.h>
+#include <i2c.h>
+
+static int cur_busnum;
+
+static int i2c_compat_get_device(uint chip_addr, int alen,
+				 struct udevice **devp)
+{
+	struct dm_i2c_chip *chip;
+	int ret;
+
+	ret = i2c_get_chip_for_busnum(cur_busnum, chip_addr, alen, devp);
+	if (ret)
+		return ret;
+	chip = dev_get_parent_platdata(*devp);
+	if (chip->offset_len != alen) {
+		printf("I2C chip %x: requested alen %d does not match chip offset_len %d\n",
+		       chip_addr, alen, chip->offset_len);
+		return -EADDRNOTAVAIL;
+	}
+
+	return 0;
+}
+
+int i2c_probe(uint8_t chip_addr)
+{
+	struct udevice *bus, *dev;
+	int ret;
+
+	ret = uclass_get_device_by_seq(UCLASS_I2C, cur_busnum, &bus);
+	if (ret) {
+		debug("Cannot find I2C bus %d: err=%d\n", cur_busnum, ret);
+		return ret;
+	}
+
+	if (!bus)
+		return -ENOENT;
+
+	return dm_i2c_probe(bus, chip_addr, 0, &dev);
+}
+
+int i2c_read(uint8_t chip_addr, unsigned int addr, int alen, uint8_t *buffer,
+	     int len)
+{
+	struct udevice *dev;
+	int ret;
+
+	ret = i2c_compat_get_device(chip_addr, alen, &dev);
+	if (ret)
+		return ret;
+
+	return dm_i2c_read(dev, addr, buffer, len);
+}
+
+int i2c_write(uint8_t chip_addr, unsigned int addr, int alen, uint8_t *buffer,
+	      int len)
+{
+	struct udevice *dev;
+	int ret;
+
+	ret = i2c_compat_get_device(chip_addr, alen, &dev);
+	if (ret)
+		return ret;
+
+	return dm_i2c_write(dev, addr, buffer, len);
+}
+
+int i2c_get_bus_num_fdt(int node)
+{
+	struct udevice *bus;
+	int ret;
+
+	ret = uclass_get_device_by_of_offset(UCLASS_I2C, node, &bus);
+	if (ret)
+		return ret;
+
+	return bus->seq;
+}
+
+unsigned int i2c_get_bus_num(void)
+{
+	return cur_busnum;
+}
+
+int i2c_set_bus_num(unsigned int bus)
+{
+	cur_busnum = bus;
+
+	return 0;
+}
+
+void i2c_init(int speed, int slaveaddr)
+{
+	/* Nothing to do here - the init happens through driver model */
+}
+
+void board_i2c_init(const void *blob)
+{
+	/* Nothing to do here - the init happens through driver model */
+}