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i2c: sun8i_rsb: Initialize chips in .child_pre_probe

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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@sholland.org>
Acked-by: Andre Przywara <andre.przywara@arm.com>
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
This commit is contained in:
Samuel Holland 2022-03-17 23:52:35 -05:00 committed by Andre Przywara
parent 07c411346c
commit c9dd3caae3
1 changed files with 2 additions and 1 deletions
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3
drivers/i2c/sun8i_rsb.c
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@ -244,11 +244,12 @@ 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 = {