greybus: gpio-gb: convert to use gb_operation_sync
This converts the GPIO protocol driver to use gb_operation_sync, removing lots of places where the create/send/destroy pattern was being used to send greybus messages. Signed-off-by: Greg Kroah-Hartman <greg@kroah.com> Reviewed-by: Alex Elder <elder@linaro.org>hifive-unleashed-5.1
Greg Kroah-Hartman
parent
e51f1d1a77
commit
7d5bbb1735
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@ -116,337 +116,193 @@ struct gb_gpio_set_debounce_request {
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* This request only uses the connection field, and if successful,
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* fills in the major and minor protocol version of the target.
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*/
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static int
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gb_gpio_proto_version_operation(struct gb_gpio_controller *gb_gpio_controller)
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static int gb_gpio_proto_version_operation(struct gb_gpio_controller *ggc)
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{
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struct gb_connection *connection = gb_gpio_controller->connection;
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struct gb_operation *operation;
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struct gb_gpio_proto_version_response *response;
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struct gb_gpio_proto_version_response response;
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int ret;
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/* protocol version request has no payload */
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operation = gb_operation_create(connection,
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GB_GPIO_TYPE_PROTOCOL_VERSION,
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0, sizeof(*response));
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if (!operation)
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return -ENOMEM;
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ret = gb_operation_sync(ggc->connection, GB_GPIO_TYPE_PROTOCOL_VERSION,
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NULL, 0, &response, sizeof(response));
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if (ret)
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return ret;
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/* Synchronous operation--no callback */
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ret = gb_operation_request_send(operation, NULL);
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if (ret) {
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pr_err("version operation failed (%d)\n", ret);
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goto out;
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}
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response = operation->response->payload;
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if (response->major > GB_GPIO_VERSION_MAJOR) {
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if (response.major > GB_GPIO_VERSION_MAJOR) {
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pr_err("unsupported major version (%hhu > %hhu)\n",
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response->major, GB_GPIO_VERSION_MAJOR);
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ret = -ENOTSUPP;
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} else {
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gb_gpio_controller->version_major = response->major;
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gb_gpio_controller->version_minor = response->minor;
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response.major, GB_GPIO_VERSION_MAJOR);
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return -ENOTSUPP;
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}
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out:
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gb_operation_destroy(operation);
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ggc->version_major = response.major;
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ggc->version_minor = response.minor;
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return 0;
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}
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static int gb_gpio_line_count_operation(struct gb_gpio_controller *ggc)
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{
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struct gb_gpio_line_count_response response;
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int ret;
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ret = gb_operation_sync(ggc->connection, GB_GPIO_TYPE_LINE_COUNT,
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NULL, 0, &response, sizeof(response));
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if (!ret)
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ggc->line_max = response.count;
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return ret;
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}
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static int gb_gpio_line_count_operation(struct gb_gpio_controller *gb_gpio_controller)
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static int gb_gpio_activate_operation(struct gb_gpio_controller *ggc, u8 which)
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{
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struct gb_connection *connection = gb_gpio_controller->connection;
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struct gb_operation *operation;
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struct gb_gpio_line_count_response *response;
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struct gb_gpio_activate_request request;
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int ret;
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/* line count request has no payload */
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operation = gb_operation_create(connection,
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GB_GPIO_TYPE_LINE_COUNT,
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0, sizeof(*response));
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if (!operation)
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return -ENOMEM;
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/* Synchronous operation--no callback */
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ret = gb_operation_request_send(operation, NULL);
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if (ret) {
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pr_err("line count operation failed (%d)\n", ret);
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} else {
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response = operation->response->payload;
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gb_gpio_controller->line_max = response->count;
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}
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gb_operation_destroy(operation);
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return ret;
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}
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static int gb_gpio_activate_operation(struct gb_gpio_controller *gb_gpio_controller,
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u8 which)
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{
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struct gb_connection *connection = gb_gpio_controller->connection;
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struct gb_operation *operation;
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struct gb_gpio_activate_request *request;
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int ret;
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if (which > gb_gpio_controller->line_max)
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if (which > ggc->line_max)
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return -EINVAL;
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/* activate response has no payload */
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operation = gb_operation_create(connection,
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GB_GPIO_TYPE_ACTIVATE,
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sizeof(*request), 0);
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if (!operation)
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return -ENOMEM;
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request = operation->request->payload;
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request->which = which;
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/* Synchronous operation--no callback */
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ret = gb_operation_request_send(operation, NULL);
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if (ret)
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pr_err("activate operation failed (%d)\n", ret);
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else
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gb_gpio_controller->lines[which].active = true;
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gb_operation_destroy(operation);
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request.which = which;
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ret = gb_operation_sync(ggc->connection, GB_GPIO_TYPE_ACTIVATE,
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&request, sizeof(request), NULL, 0);
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if (!ret)
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ggc->lines[which].active = true;
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return ret;
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}
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static int gb_gpio_deactivate_operation(struct gb_gpio_controller *gb_gpio_controller,
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static int gb_gpio_deactivate_operation(struct gb_gpio_controller *ggc,
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u8 which)
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{
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struct gb_connection *connection = gb_gpio_controller->connection;
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struct gb_operation *operation;
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struct gb_gpio_deactivate_request *request;
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struct gb_gpio_deactivate_request request;
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int ret;
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if (which > gb_gpio_controller->line_max)
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if (which > ggc->line_max)
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return -EINVAL;
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/* deactivate response has no payload */
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operation = gb_operation_create(connection,
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GB_GPIO_TYPE_DEACTIVATE,
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sizeof(*request), 0);
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if (!operation)
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return -ENOMEM;
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request = operation->request->payload;
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request->which = which;
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/* Synchronous operation--no callback */
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ret = gb_operation_request_send(operation, NULL);
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if (ret)
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pr_err("deactivate operation failed (%d)\n", ret);
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else
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gb_gpio_controller->lines[which].active = false;
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gb_operation_destroy(operation);
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request.which = which;
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ret = gb_operation_sync(ggc->connection, GB_GPIO_TYPE_DEACTIVATE,
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&request, sizeof(request), NULL, 0);
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if (!ret)
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ggc->lines[which].active = false;
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return ret;
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}
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static int gb_gpio_get_direction_operation(struct gb_gpio_controller *gb_gpio_controller,
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static int gb_gpio_get_direction_operation(struct gb_gpio_controller *ggc,
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u8 which)
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{
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struct gb_connection *connection = gb_gpio_controller->connection;
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struct gb_operation *operation;
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struct gb_gpio_get_direction_request *request;
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struct gb_gpio_get_direction_response *response;
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struct gb_gpio_get_direction_request request;
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struct gb_gpio_get_direction_response response;
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int ret;
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u8 direction;
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if (which > gb_gpio_controller->line_max)
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if (which > ggc->line_max)
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return -EINVAL;
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operation = gb_operation_create(connection,
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GB_GPIO_TYPE_GET_DIRECTION,
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sizeof(*request), sizeof(*response));
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if (!operation)
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return -ENOMEM;
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request = operation->request->payload;
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request->which = which;
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request.which = which;
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ret = gb_operation_sync(ggc->connection, GB_GPIO_TYPE_GET_DIRECTION,
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&request, sizeof(request),
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&response, sizeof(response));
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if (ret)
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return ret;
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/* Synchronous operation--no callback */
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ret = gb_operation_request_send(operation, NULL);
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if (ret) {
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pr_err("get direction operation failed (%d)\n", ret);
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goto out;
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}
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response = operation->response->payload;
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direction = response->direction;
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direction = response.direction;
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if (direction && direction != 1)
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pr_warn("gpio %u direction was %u (should be 0 or 1)\n",
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which, direction);
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gb_gpio_controller->lines[which].direction = direction ? 1 : 0;
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out:
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gb_operation_destroy(operation);
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return ret;
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ggc->lines[which].direction = direction ? 1 : 0;
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return 0;
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}
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static int gb_gpio_direction_in_operation(struct gb_gpio_controller *gb_gpio_controller,
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static int gb_gpio_direction_in_operation(struct gb_gpio_controller *ggc,
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u8 which)
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{
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struct gb_connection *connection = gb_gpio_controller->connection;
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struct gb_operation *operation;
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struct gb_gpio_direction_in_request *request;
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struct gb_gpio_direction_in_request request;
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int ret;
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if (which > gb_gpio_controller->line_max)
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if (which > ggc->line_max)
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return -EINVAL;
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/* direction_in response has no payload */
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operation = gb_operation_create(connection,
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GB_GPIO_TYPE_DIRECTION_IN,
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sizeof(*request), 0);
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if (!operation)
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return -ENOMEM;
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request = operation->request->payload;
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request->which = which;
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/* Synchronous operation--no callback */
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ret = gb_operation_request_send(operation, NULL);
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if (ret)
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pr_err("direction in operation failed (%d)\n", ret);
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else
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gb_gpio_controller->lines[which].direction = 1;
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gb_operation_destroy(operation);
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request.which = which;
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ret = gb_operation_sync(ggc->connection, GB_GPIO_TYPE_DIRECTION_IN,
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&request, sizeof(request), NULL, 0);
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if (!ret)
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ggc->lines[which].direction = 1;
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return ret;
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}
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static int gb_gpio_direction_out_operation(struct gb_gpio_controller *gb_gpio_controller,
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static int gb_gpio_direction_out_operation(struct gb_gpio_controller *ggc,
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u8 which, bool value_high)
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{
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struct gb_connection *connection = gb_gpio_controller->connection;
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struct gb_operation *operation;
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struct gb_gpio_direction_out_request *request;
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struct gb_gpio_direction_out_request request;
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int ret;
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if (which > gb_gpio_controller->line_max)
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if (which > ggc->line_max)
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return -EINVAL;
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/* direction_out response has no payload */
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operation = gb_operation_create(connection,
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GB_GPIO_TYPE_DIRECTION_OUT,
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sizeof(*request), 0);
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if (!operation)
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return -ENOMEM;
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request = operation->request->payload;
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request->which = which;
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request->value = value_high ? 1 : 0;
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/* Synchronous operation--no callback */
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ret = gb_operation_request_send(operation, NULL);
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if (ret)
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pr_err("direction out operation failed (%d)\n", ret);
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else
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gb_gpio_controller->lines[which].direction = 0;
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gb_operation_destroy(operation);
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request.which = which;
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request.value = value_high ? 1 : 0;
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ret = gb_operation_sync(ggc->connection, GB_GPIO_TYPE_DIRECTION_OUT,
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&request, sizeof(request), NULL, 0);
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if (!ret)
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ggc->lines[which].direction = 0;
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return ret;
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}
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static int gb_gpio_get_value_operation(struct gb_gpio_controller *gb_gpio_controller,
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static int gb_gpio_get_value_operation(struct gb_gpio_controller *ggc,
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u8 which)
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{
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struct gb_connection *connection = gb_gpio_controller->connection;
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struct gb_operation *operation;
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struct gb_gpio_get_value_request *request;
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struct gb_gpio_get_value_response *response;
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struct gb_gpio_get_value_request request;
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struct gb_gpio_get_value_response response;
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int ret;
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u8 value;
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if (which > gb_gpio_controller->line_max)
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if (which > ggc->line_max)
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return -EINVAL;
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operation = gb_operation_create(connection,
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GB_GPIO_TYPE_GET_VALUE,
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sizeof(*request), sizeof(*response));
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if (!operation)
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return -ENOMEM;
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request = operation->request->payload;
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request->which = which;
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request.which = which;
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ret = gb_operation_sync(ggc->connection, GB_GPIO_TYPE_GET_VALUE,
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&request, sizeof(request),
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&response, sizeof(response));
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if (ret)
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return ret;
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/* Synchronous operation--no callback */
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ret = gb_operation_request_send(operation, NULL);
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if (ret) {
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pr_err("get value operation failed (%d)\n", ret);
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goto out;
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}
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response = operation->response->payload;
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value = response->value;
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value = response.value;
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if (value && value != 1)
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pr_warn("gpio %u value was %u (should be 0 or 1)\n",
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which, value);
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gb_gpio_controller->lines[which].value = value ? 1 : 0;
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out:
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gb_operation_destroy(operation);
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return ret;
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ggc->lines[which].value = value ? 1 : 0;
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return 0;
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}
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static int gb_gpio_set_value_operation(struct gb_gpio_controller *gb_gpio_controller,
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static int gb_gpio_set_value_operation(struct gb_gpio_controller *ggc,
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u8 which, bool value_high)
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{
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struct gb_connection *connection = gb_gpio_controller->connection;
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struct gb_operation *operation;
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struct gb_gpio_set_value_request *request;
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struct gb_gpio_set_value_request request;
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int ret;
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if (which > gb_gpio_controller->line_max)
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if (which > ggc->line_max)
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return -EINVAL;
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/* set_value response has no payload */
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operation = gb_operation_create(connection,
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GB_GPIO_TYPE_SET_VALUE,
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sizeof(*request), 0);
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if (!operation)
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return -ENOMEM;
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request = operation->request->payload;
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request->which = which;
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request->value = value_high ? 1 : 0;
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/* Synchronous operation--no callback */
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ret = gb_operation_request_send(operation, NULL);
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if (ret)
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pr_err("set value operation failed (%d)\n", ret);
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else /* XXX should this set direction to out? */
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gb_gpio_controller->lines[which].value = request->value;
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gb_operation_destroy(operation);
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request.which = which;
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request.value = value_high ? 1 : 0;
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ret = gb_operation_sync(ggc->connection, GB_GPIO_TYPE_SET_VALUE,
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&request, sizeof(request), NULL, 0);
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if (!ret) {
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/* XXX should this set direction to out? */
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ggc->lines[which].value = request.value;
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}
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return ret;
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}
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static int gb_gpio_set_debounce_operation(struct gb_gpio_controller *gb_gpio_controller,
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static int gb_gpio_set_debounce_operation(struct gb_gpio_controller *ggc,
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u8 which, u16 debounce_usec)
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{
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struct gb_connection *connection = gb_gpio_controller->connection;
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struct gb_operation *operation;
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struct gb_gpio_set_debounce_request *request;
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struct gb_gpio_set_debounce_request request;
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int ret;
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if (which > gb_gpio_controller->line_max)
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if (which > ggc->line_max)
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return -EINVAL;
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/* set_debounce response has no payload */
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operation = gb_operation_create(connection,
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GB_GPIO_TYPE_SET_DEBOUNCE,
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sizeof(*request), 0);
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if (!operation)
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return -ENOMEM;
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request = operation->request->payload;
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request->which = which;
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request->usec = cpu_to_le16(debounce_usec);
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/* Synchronous operation--no callback */
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ret = gb_operation_request_send(operation, NULL);
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if (ret)
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pr_err("set debounce operation failed (%d)\n", ret);
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else
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gb_gpio_controller->lines[which].debounce_usec =
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le16_to_cpu(request->usec);
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gb_operation_destroy(operation);
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request.which = which;
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request.usec = cpu_to_le16(debounce_usec);
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ret = gb_operation_sync(ggc->connection, GB_GPIO_TYPE_SET_DEBOUNCE,
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&request, sizeof(request), NULL, 0);
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if (!ret)
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ggc->lines[which].debounce_usec = debounce_usec;
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return ret;
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}
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