From patchwork Thu Jul 21 11:09:11 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shubhrajyoti Datta X-Patchwork-Id: 994562 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by demeter1.kernel.org (8.14.4/8.14.4) with ESMTP id p6LB9bPA008041 for ; Thu, 21 Jul 2011 11:10:06 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751740Ab1GULJg (ORCPT ); Thu, 21 Jul 2011 07:09:36 -0400 Received: from bear.ext.ti.com ([192.94.94.41]:47357 "EHLO bear.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751765Ab1GULJe (ORCPT ); Thu, 21 Jul 2011 07:09:34 -0400 Received: from dbdp20.itg.ti.com ([172.24.170.38]) by bear.ext.ti.com (8.13.7/8.13.7) with ESMTP id p6LB9RfR030591 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Thu, 21 Jul 2011 06:09:29 -0500 Received: from dbde71.ent.ti.com (localhost [127.0.0.1]) by dbdp20.itg.ti.com (8.13.8/8.13.8) with ESMTP id p6LB9Qds025737; Thu, 21 Jul 2011 16:39:26 +0530 (IST) Received: from dbdp31.itg.ti.com (172.24.170.98) by DBDE71.ent.ti.com (172.24.170.149) with Microsoft SMTP Server id 8.3.106.1; Thu, 21 Jul 2011 16:39:26 +0530 Received: from a0393217ubnlt.india.ti.com ([172.24.190.93]) by dbdp31.itg.ti.com (8.13.8/8.13.8) with ESMTP id p6LB9GcA022486; Thu, 21 Jul 2011 16:39:23 +0530 (IST) From: Shubhrajyoti D To: CC: linux-i2c@vger.kernel.org, linux-arm-kernel@lists.infradead.org, khilman@ti.com, rnayak@ti.com, balajitk@ti.com, Shubhrajyoti D Subject: [PATCHV2 2/5] OMAP: I2C: Reset support Date: Thu, 21 Jul 2011 16:39:11 +0530 Message-ID: <1311246554-22975-3-git-send-email-shubhrajyoti@ti.com> X-Mailer: git-send-email 1.7.1 In-Reply-To: <1311246554-22975-1-git-send-email-shubhrajyoti@ti.com> References: <1311246554-22975-1-git-send-email-shubhrajyoti@ti.com> MIME-Version: 1.0 Sender: linux-omap-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-omap@vger.kernel.org X-Greylist: IP, sender and recipient auto-whitelisted, not delayed by milter-greylist-4.2.6 (demeter1.kernel.org [140.211.167.41]); Thu, 21 Jul 2011 11:10:07 +0000 (UTC) Under some error conditions the i2c driver may do a reset adding support in the platform. Signed-off-by: Shubhrajyoti D --- arch/arm/plat-omap/i2c.c | 17 +++++++++++++++++ 1 files changed, 17 insertions(+), 0 deletions(-) diff --git a/arch/arm/plat-omap/i2c.c b/arch/arm/plat-omap/i2c.c index 2388b8e..98a97b0 100644 --- a/arch/arm/plat-omap/i2c.c +++ b/arch/arm/plat-omap/i2c.c @@ -146,6 +146,22 @@ static struct omap_device_pm_latency omap_i2c_latency[] = { .flags = OMAP_DEVICE_LATENCY_AUTO_ADJUST, }, }; +/** + * omap2_i2c_reset - reset the omap i2c module. + * @dev: struct device* + */ + +static int omap2_i2c_reset(struct device *dev) +{ + int r = 0; + struct platform_device *pdev = to_platform_device(dev); + struct omap_device *odev = to_omap_device(pdev); + struct omap_hwmod *oh; + + oh = odev->hwmods[0]; + r = omap_hwmod_reset(oh); + return r; +} static inline int omap2_i2c_add_bus(int bus_id) { @@ -187,6 +203,7 @@ static inline int omap2_i2c_add_bus(int bus_id) */ if (cpu_is_omap34xx()) pdata->set_mpu_wkup_lat = omap_pm_set_max_mpu_wakeup_lat_compat; + pdata->device_reset = omap2_i2c_reset; od = omap_device_build(name, bus_id, oh, pdata, sizeof(struct omap_i2c_bus_platform_data), omap_i2c_latency, ARRAY_SIZE(omap_i2c_latency), 0);