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greybus: i2c: add runtime pm support 

Add runtime pm support to camera i2c bridged phy device class driver

Testing Done:
 - Passed #gb_test.sh -v -t i2c

Signed-off-by: David Lin <dtwlin@google.com>
Signed-off-by: Axel Haslam <haslam_axel@projectara.com>
Reviewed-by: Johan Hovold <johan@hovoldconsulting.com>
Signed-off-by: Alex Elder <elder@linaro.org>
This commit is contained in:
David Lin 2016-07-14 15:13:00 -05:00 committed by Alex Elder
parent af5dc7f8c0
commit c0e72f6af7
1 changed files with 13 additions and 0 deletions
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13
drivers/staging/greybus/i2c.c
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@ -176,6 +176,10 @@ static int gb_i2c_transfer_operation(struct gb_i2c_device *gb_i2c_dev,
if (!operation)
return -ENOMEM;
ret = gbphy_runtime_get_sync(gb_i2c_dev->gbphy_dev);
if (ret)
goto exit_operation_put;
ret = gb_operation_request_send_sync(operation);
if (!ret) {
struct gb_i2c_transfer_response *response;
@ -187,6 +191,9 @@ static int gb_i2c_transfer_operation(struct gb_i2c_device *gb_i2c_dev,
dev_err(dev, "transfer operation failed (%d)\n", ret);
}
gbphy_runtime_put_autosuspend(gb_i2c_dev->gbphy_dev);
exit_operation_put:
gb_operation_put(operation);
return ret;
@ -290,6 +297,7 @@ static int gb_i2c_probe(struct gbphy_device *gbphy_dev,
if (ret)
goto exit_connection_disable;
gbphy_runtime_put_autosuspend(gbphy_dev);
return 0;
exit_connection_disable:
@ -306,6 +314,11 @@ static void gb_i2c_remove(struct gbphy_device *gbphy_dev)
{
struct gb_i2c_device *gb_i2c_dev = gb_gbphy_get_data(gbphy_dev);
struct gb_connection *connection = gb_i2c_dev->connection;
int ret;
ret = gbphy_runtime_get_sync(gbphy_dev);
if (ret)
gbphy_runtime_get_noresume(gbphy_dev);
i2c_del_adapter(&gb_i2c_dev->adapter);
gb_connection_disable(connection);