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i2c: tegra: Fix regression by implementing a dummy probe_chip() callback

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Commit f32a8007ef ("dm: i2c: Make i2c_get_chip_for_busnum() fail if the
chip is not detected") introduced a regression for the NVIDIA Jetson TX2.

For some reason the xfer callback of the tegra i2c driver doesn't support
probing the I2C devices with a 0-length message.
Fixing the regression by providing a dummy implementation of probe_chip()
that does nothing.

Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com>
Tested-by: Stephen Warren <swarren@nvidia.com>
This commit is contained in:
Jean-Jacques Hiblot 2018-12-11 19:56:34 +01:00 committed by Heiko Schocher
parent ee168783ae
commit 22ecff594d
1 changed files with 7 additions and 0 deletions
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7
drivers/i2c/tegra186_bpmp_i2c.c
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@ -85,6 +85,12 @@ static int tegra186_bpmp_i2c_xfer(struct udevice *dev, struct i2c_msg *msg,
return 0;
}
static int tegra186_bpmp_probe_chip(struct udevice *bus, uint chip_addr,
uint chip_flags)
{
return 0;
}
static int tegra186_bpmp_i2c_probe(struct udevice *dev)
{
struct tegra186_bpmp_i2c *priv = dev_get_priv(dev);
@ -101,6 +107,7 @@ static int tegra186_bpmp_i2c_probe(struct udevice *dev)
static const struct dm_i2c_ops tegra186_bpmp_i2c_ops = {
.xfer = tegra186_bpmp_i2c_xfer,
.probe_chip = tegra186_bpmp_probe_chip,
};
static const struct udevice_id tegra186_bpmp_i2c_ids[] = {