[U-Boot] [PATCH] dm: i2c: Add compatibility functions for dm_i2c_reg_read/write()

[Simon Glass]

Add the legacy i2c_reg_read/write() functions to the compatibility layer
so that they can be used when CONFIG_DM_I2C_COMPAT is defined.

Signed-off-by: Simon Glass <sjg at chromium.org>
---

 drivers/i2c/i2c-uclass-compat.c | 21 +++++++++++++++++++++
 include/i2c.h                   |  6 ++++++
 2 files changed, 27 insertions(+)

diff --git a/drivers/i2c/i2c-uclass-compat.c b/drivers/i2c/i2c-uclass-compat.c
index 223f238..5606d1f 100644
--- a/drivers/i2c/i2c-uclass-compat.c
+++ b/drivers/i2c/i2c-uclass-compat.c
@@ -106,3 +106,24 @@ void board_i2c_init(const void *blob)
 {
 	/* Nothing to do here - the init happens through driver model */
 }
+
+uint8_t i2c_reg_read(uint8_t chip_addr, uint8_t offset)
+{
+	struct udevice *dev;
+	int ret;
+
+	ret = i2c_compat_get_device(chip_addr, 1, &dev);
+	if (ret)
+		return 0xff;
+	return dm_i2c_reg_read(dev, offset);
+}
+
+void i2c_reg_write(uint8_t chip_addr, uint8_t offset, uint8_t val)
+{
+	struct udevice *dev;
+	int ret;
+
+	ret = i2c_compat_get_device(chip_addr, 1, &dev);
+	if (!ret)
+		dm_i2c_reg_write(dev, offset, val);
+}
diff --git a/include/i2c.h b/include/i2c.h
index ddfebc4..9300d97 100644
--- a/include/i2c.h
+++ b/include/i2c.h
@@ -284,6 +284,12 @@ void i2c_init(int speed, int slaveaddr);
  */
 void board_i2c_init(const void *blob);
 
+/*
+ * Compatibility functions for driver model.
+ */
+uint8_t i2c_reg_read(uint8_t addr, uint8_t reg);
+void i2c_reg_write(uint8_t addr, uint8_t reg, uint8_t val);
+
 #endif
 
 /*
-- 
2.2.0.rc0.207.ga3a616c