From patchwork Fri Jul 29 10:36:51 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shubhrajyoti Datta X-Patchwork-Id: 1019332 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 p6TAbElF029379 for ; Fri, 29 Jul 2011 10:37:14 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756182Ab1G2KhI (ORCPT ); Fri, 29 Jul 2011 06:37:08 -0400 Received: from bear.ext.ti.com ([192.94.94.41]:47350 "EHLO bear.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756178Ab1G2KhH (ORCPT ); Fri, 29 Jul 2011 06:37:07 -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 p6TAb0Xn014914 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Fri, 29 Jul 2011 05:37:03 -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 p6TAb022005164; Fri, 29 Jul 2011 16:07:00 +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; Fri, 29 Jul 2011 16:07:00 +0530 Received: from a0393217ubnlt.india.ti.com ([172.24.190.250]) by dbdp31.itg.ti.com (8.13.8/8.13.8) with ESMTP id p6TAavnQ011247; Fri, 29 Jul 2011 16:07:00 +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, santosh.shilimkar@ti.com, Shubhrajyoti D Subject: [PATCHv5 1/3] OMAP: I2C: Reset support Date: Fri, 29 Jul 2011 16:06:51 +0530 Message-ID: <1311935813-8481-2-git-send-email-shubhrajyoti@ti.com> X-Mailer: git-send-email 1.7.1 In-Reply-To: <1311935813-8481-1-git-send-email-shubhrajyoti@ti.com> References: <1311935813-8481-1-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]); Fri, 29 Jul 2011 10:37:14 +0000 (UTC) Under some error conditions the i2c driver may do a reset. Adding a reset field and support in the platform. Signed-off-by: Shubhrajyoti D --- arch/arm/plat-omap/i2c.c | 18 ++++++++++++++++++ include/linux/i2c-omap.h | 1 + 2 files changed, 19 insertions(+), 0 deletions(-) diff --git a/arch/arm/plat-omap/i2c.c b/arch/arm/plat-omap/i2c.c index 2388b8e..be36cac 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 +203,8 @@ 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); diff --git a/include/linux/i2c-omap.h b/include/linux/i2c-omap.h index 98ae49b..8aa91b6 100644 --- a/include/linux/i2c-omap.h +++ b/include/linux/i2c-omap.h @@ -38,6 +38,7 @@ struct omap_i2c_bus_platform_data { int (*device_enable) (struct platform_device *pdev); int (*device_shutdown) (struct platform_device *pdev); int (*device_idle) (struct platform_device *pdev); + int (*device_reset) (struct device *dev); }; #endif