5.15-stable review patch. If anyone has any objections, please let me know.
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From: Geert Uytterhoeven geert+renesas@glider.be
[ Upstream commit 574f5ee2c85a00a579549d50e9fc9c6c072ee4c4 ]
Each bridge instance creates up to four auxiliary devices with different names. However, their IDs are always zero, causing duplicate filename errors when a system has multiple bridges:
sysfs: cannot create duplicate filename '/bus/auxiliary/devices/ti_sn65dsi86.gpio.0'
Fix this by using a unique instance ID per bridge instance. The instance ID is derived from the I2C adapter number and the bridge's I2C address, to support multiple instances on the same bus.
Fixes: bf73537f411b ("drm/bridge: ti-sn65dsi86: Break GPIO and MIPI-to-eDP bridge into sub-drivers") Signed-off-by: Geert Uytterhoeven geert+renesas@glider.be Reviewed-by: Douglas Anderson dianders@chromium.org Signed-off-by: Douglas Anderson dianders@chromium.org Link: https://patchwork.freedesktop.org/patch/msgid/7a68a0e3f927e26edca6040067fb65... Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/gpu/drm/bridge/ti-sn65dsi86.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/drivers/gpu/drm/bridge/ti-sn65dsi86.c b/drivers/gpu/drm/bridge/ti-sn65dsi86.c index b488c6cb8f106..1c9dd62d3c47b 100644 --- a/drivers/gpu/drm/bridge/ti-sn65dsi86.c +++ b/drivers/gpu/drm/bridge/ti-sn65dsi86.c @@ -424,6 +424,7 @@ static int ti_sn65dsi86_add_aux_device(struct ti_sn65dsi86 *pdata, const char *name) { struct device *dev = pdata->dev; + const struct i2c_client *client = to_i2c_client(dev); struct auxiliary_device *aux; int ret;
@@ -432,6 +433,7 @@ static int ti_sn65dsi86_add_aux_device(struct ti_sn65dsi86 *pdata, return -ENOMEM;
aux->name = name; + aux->id = (client->adapter->nr << 10) | client->addr; aux->dev.parent = dev; aux->dev.release = ti_sn65dsi86_aux_device_release; device_set_of_node_from_dev(&aux->dev, dev);