From patchwork Thu Dec 22 15:54:02 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Petazzoni X-Patchwork-Id: 708277 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 3tkx0N6G7fz9t0w for ; Fri, 23 Dec 2016 02:54:12 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S936420AbcLVPyL (ORCPT ); Thu, 22 Dec 2016 10:54:11 -0500 Received: from mail.free-electrons.com ([62.4.15.54]:49855 "EHLO mail.free-electrons.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758658AbcLVPyK (ORCPT ); Thu, 22 Dec 2016 10:54:10 -0500 Received: by mail.free-electrons.com (Postfix, from userid 110) id E6BB620709; Thu, 22 Dec 2016 16:54:04 +0100 (CET) X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on mail.free-electrons.com X-Spam-Level: X-Spam-Status: No, score=-1.0 required=5.0 tests=ALL_TRUSTED,SHORTCIRCUIT, URIBL_BLOCKED shortcircuit=ham autolearn=disabled version=3.4.0 Received: from localhost (LStLambert-657-1-97-87.w90-63.abo.wanadoo.fr [90.63.216.87]) by mail.free-electrons.com (Postfix) with ESMTPSA id BCB50206E8; Thu, 22 Dec 2016 16:54:04 +0100 (CET) From: Thomas Petazzoni To: Wolfram Sang , linux-i2c@vger.kernel.org Cc: Jason Cooper , Andrew Lunn , Sebastian Hesselbarth , Gregory Clement , linux-arm-kernel@lists.infradead.org, Grzegorz Jaszczyk , Thomas Petazzoni Subject: [PATCH] i2c: mv64xxx: add suspend/resume support Date: Thu, 22 Dec 2016 16:54:02 +0100 Message-Id: <1482422042-30201-1-git-send-email-thomas.petazzoni@free-electrons.com> X-Mailer: git-send-email 2.7.4 Sender: linux-i2c-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-i2c@vger.kernel.org From: Grzegorz Jaszczyk This commit implements suspend/resume support in the mv64xxx I2C controller driver. There is no need to implement a ->suspend() hook, as calling mv64xxx_i2c_hw_init() at ->resume() time is enough. Signed-off-by: Grzegorz Jaszczyk Reviewed-by: Nadav Haklai Reviewed-by: Lior Amsalem Tested-by: Lior Amsalem [Thomas: switch to dev_pm_ops, fix build warning when !PM.] Signed-off-by: Thomas Petazzoni --- drivers/i2c/busses/i2c-mv64xxx.c | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) diff --git a/drivers/i2c/busses/i2c-mv64xxx.c b/drivers/i2c/busses/i2c-mv64xxx.c index b4dec08..a50bd68 100644 --- a/drivers/i2c/busses/i2c-mv64xxx.c +++ b/drivers/i2c/busses/i2c-mv64xxx.c @@ -977,11 +977,32 @@ mv64xxx_i2c_remove(struct platform_device *dev) return 0; } +#ifdef CONFIG_PM +static int mv64xxx_i2c_resume(struct device *dev) +{ + struct platform_device *pdev = to_platform_device(dev); + struct mv64xxx_i2c_data *drv_data = platform_get_drvdata(pdev); + + mv64xxx_i2c_hw_init(drv_data); + + return 0; +} + +static const struct dev_pm_ops mv64xxx_i2c_pm = { + .resume = mv64xxx_i2c_resume, +}; + +#define mv64xxx_i2c_pm_ops (&mv64xxx_i2c_pm) +#else +#define mv64xxx_i2c_pm_ops NULL +#endif + static struct platform_driver mv64xxx_i2c_driver = { .probe = mv64xxx_i2c_probe, .remove = mv64xxx_i2c_remove, .driver = { .name = MV64XXX_I2C_CTLR_NAME, + .pm = mv64xxx_i2c_pm_ops, .of_match_table = mv64xxx_i2c_of_match_table, }, };