[PATCH 3/4] i2c: sun8i_rsb: Initialize chips in .child_pre_probe

[Samuel Holland]

Chips attached to the RSB bus require an initialization command before
they can be used. (Specifically, this command programs the chip's
runtime address.) The driver does this in its .probe_chip hook, under
the assumption that .probe_chip is called during child probe. This is
not the case; .probe_chip is only called by dm_i2c_probe, which is
intended for use by board-level code, not for chips with OF nodes.

Since this initialization command must be run before a child chip can be
used, do it before probing each child.

Signed-off-by: Samuel Holland <samuel at sholland.org>
---

 drivers/i2c/sun8i_rsb.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/i2c/sun8i_rsb.c b/drivers/i2c/sun8i_rsb.c
index 716b245a00..0681e398f7 100644
--- a/drivers/i2c/sun8i_rsb.c
+++ b/drivers/i2c/sun8i_rsb.c
@@ -252,11 +252,12 @@ static int sun8i_rsb_probe(struct udevice *bus)
 static int sun8i_rsb_child_pre_probe(struct udevice *child)
 {
 	struct dm_i2c_chip *chip = dev_get_parent_plat(child);
+	struct udevice *bus = child->parent;
 
 	/* Ensure each transfer is for a single register. */
 	chip->flags |= DM_I2C_CHIP_RD_ADDRESS | DM_I2C_CHIP_WR_ADDRESS;
 
-	return 0;
+	return sun8i_rsb_probe_chip(bus, chip->chip_addr, 0);
 }
 
 static const struct dm_i2c_ops sun8i_rsb_ops = {
-- 
2.33.1