Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965947AbbKEXib (ORCPT ); Thu, 5 Nov 2015 18:38:31 -0500 Received: from us-mx2.synaptics.com ([192.147.44.131]:27166 "EHLO us-mx1.synaptics.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S965400AbbKEXi1 (ORCPT ); Thu, 5 Nov 2015 18:38:27 -0500 X-PGP-Universal: processed; by securemail.synaptics.com on Thu, 05 Nov 2015 16:38:51 -0800 From: Andrew Duggan To: , CC: Benjamin Tissoires , Dmitry Torokhov , Linus Walleij , Benjamin Tissoires , Christopher Heiny , Stephen Chandler Paul Subject: [PATCH 06/26] Input: synaptics-rmi4 - add a reset callback Date: Thu, 5 Nov 2015 15:38:18 -0800 Message-ID: <1446766698-30487-1-git-send-email-aduggan@synaptics.com> X-Mailer: git-send-email 2.1.4 MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.4.10.145] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1744 Lines: 52 From: Benjamin Tissoires 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 Tested-by: Andrew Duggan --- 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, -- 2.1.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/