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-rw-r--r--drivers/i2c/Makefile1
-rw-r--r--drivers/i2c/i2c-uclass-compat.c98
2 files changed, 99 insertions, 0 deletions
diff --git a/drivers/i2c/Makefile b/drivers/i2c/Makefile
index 0e4c9f4..774bc94 100644
--- a/drivers/i2c/Makefile
+++ b/drivers/i2c/Makefile
@@ -5,6 +5,7 @@
# SPDX-License-Identifier: GPL-2.0+
#
obj-$(CONFIG_DM_I2C) += i2c-uclass.o
+obj-$(CONFIG_DM_I2C_COMPAT) += i2c-uclass-compat.o
obj-$(CONFIG_SYS_I2C_ADI) += adi_i2c.o
obj-$(CONFIG_I2C_MV) += mv_i2c.o
diff --git a/drivers/i2c/i2c-uclass-compat.c b/drivers/i2c/i2c-uclass-compat.c
new file mode 100644
index 0000000..c29fc89
--- /dev/null
+++ b/drivers/i2c/i2c-uclass-compat.c
@@ -0,0 +1,98 @@
+/*
+ * 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, devp);
+ if (ret)
+ return ret;
+ chip = dev_get_parentdata(*devp);
+ if (chip->offset_len != alen) {
+ printf("Requested alen %d does not match chip offset_len %d\n",
+ 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;
+}