When a device is physically reset, the transport layer may need to reset
its state too and also do extra work to make the device accessible on the
bus.
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@xxxxxxxxxx>
---
drivers/input/rmi4/rmi_bus.h | 1 +
drivers/input/rmi4/rmi_driver.c | 8 ++++++++
2 files changed, 9 insertions(+)
diff --git a/drivers/input/rmi4/rmi_bus.h b/drivers/input/rmi4/rmi_bus.h
index d4cfc85..41d6c3d 100644
--- a/drivers/input/rmi4/rmi_bus.h
+++ b/drivers/input/rmi4/rmi_bus.h
@@ -197,6 +197,7 @@ struct rmi_transport_ops {
int (*enable_device) (struct rmi_transport_dev *xport);
void (*disable_device) (struct rmi_transport_dev *xport);
+ int (*reset)(struct rmi_transport_dev *xport, u16 reset_addr);
};
/**
diff --git a/drivers/input/rmi4/rmi_driver.c b/drivers/input/rmi4/rmi_driver.c
index 264bc62..81e7c55 100644
--- a/drivers/input/rmi4/rmi_driver.c
+++ b/drivers/input/rmi4/rmi_driver.c
@@ -611,6 +611,14 @@ static int rmi_initial_reset(struct rmi_device *rmi_dev,
const struct rmi_device_platform_data *pdata =
rmi_get_platform_data(rmi_dev);
+ if (rmi_dev->xport->ops->reset) {
+ if (rmi_dev->xport->ops->reset(rmi_dev->xport,
+ cmd_addr))
+ return error;
+
+ return RMI_SCAN_DONE;
+ }
+
error = rmi_write_block(rmi_dev, cmd_addr, &cmd_buf, 1);
if (error) {
dev_err(&rmi_dev->dev,
--
2.4.3
--
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