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

Commit f32a8007ef0f ("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>

diff --git a/drivers/i2c/tegra186_bpmp_i2c.c b/drivers/i2c/tegra186_bpmp_i2c.c
index b4fff43269889fec6d52e64eb089e314726a72e3..793f3f59b5dd9d3f8470ace157484fc71d973f8b 100644 (file)
--- a/drivers/i2c/tegra186_bpmp_i2c.c
+++ b/drivers/i2c/tegra186_bpmp_i2c.c
@@ -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[] = {