dm: i2c: Provide an offset length parameter where needed
Rather than assuming that the chip offset length is 1, allow it to be
provided. This allows chips that don't use the default offset length to
be used (at present they are only supported by the command line 'i2c'
command which sets the offset length explicitly).
Signed-off-by: Simon Glass <sjg@chromium.org>
Acked-by: Heiko Schocher <hs@denx.de>
diff --git a/drivers/i2c/i2c-uclass.c b/drivers/i2c/i2c-uclass.c
index 25f2c18..24e5ec6 100644
--- a/drivers/i2c/i2c-uclass.c
+++ b/drivers/i2c/i2c-uclass.c
@@ -220,7 +220,7 @@
return ops->xfer(bus, msg, 1);
}
-static int i2c_bind_driver(struct udevice *bus, uint chip_addr,
+static int i2c_bind_driver(struct udevice *bus, uint chip_addr, uint offset_len,
struct udevice **devp)
{
struct dm_i2c_chip chip;
@@ -238,7 +238,7 @@
/* Tell the device what we know about it */
memset(&chip, '\0', sizeof(chip));
chip.chip_addr = chip_addr;
- chip.offset_len = 1; /* we assume */
+ chip.offset_len = offset_len;
ret = device_probe_child(dev, &chip);
debug("%s: device_probe_child: ret=%d\n", __func__, ret);
if (ret)
@@ -254,7 +254,8 @@
return ret;
}
-int i2c_get_chip(struct udevice *bus, uint chip_addr, struct udevice **devp)
+int i2c_get_chip(struct udevice *bus, uint chip_addr, uint offset_len,
+ struct udevice **devp)
{
struct udevice *dev;
@@ -281,10 +282,11 @@
}
}
debug("not found\n");
- return i2c_bind_driver(bus, chip_addr, devp);
+ return i2c_bind_driver(bus, chip_addr, offset_len, devp);
}
-int i2c_get_chip_for_busnum(int busnum, int chip_addr, struct udevice **devp)
+int i2c_get_chip_for_busnum(int busnum, int chip_addr, uint offset_len,
+ struct udevice **devp)
{
struct udevice *bus;
int ret;
@@ -294,7 +296,7 @@
debug("Cannot find I2C bus %d\n", busnum);
return ret;
}
- ret = i2c_get_chip(bus, chip_addr, devp);
+ ret = i2c_get_chip(bus, chip_addr, offset_len, devp);
if (ret) {
debug("Cannot find I2C chip %02x on bus %d\n", chip_addr,
busnum);
@@ -319,7 +321,7 @@
return ret;
/* The chip was found, see if we have a driver, and probe it */
- ret = i2c_get_chip(bus, chip_addr, devp);
+ ret = i2c_get_chip(bus, chip_addr, 1, devp);
debug("%s: i2c_get_chip: ret=%d\n", __func__, ret);
return ret;