From patchwork Thu Jul 19 14:38:00 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shubhrajyoti Datta X-Patchwork-Id: 1217661 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork1.kernel.org Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) by patchwork1.kernel.org (Postfix) with ESMTP id 1A7D63FD48 for ; Thu, 19 Jul 2012 14:56:57 +0000 (UTC) Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.76 #1 (Red Hat Linux)) id 1Srs3C-0005Tw-5o; Thu, 19 Jul 2012 14:49:58 +0000 Received: from comal.ext.ti.com ([198.47.26.152]) by merlin.infradead.org with esmtps (Exim 4.76 #1 (Red Hat Linux)) id 1Srrvm-0004CP-KY for linux-arm-kernel@lists.infradead.org; Thu, 19 Jul 2012 14:42:20 +0000 Received: from dbdp20.itg.ti.com ([172.24.170.38]) by comal.ext.ti.com (8.13.7/8.13.7) with ESMTP id q6JEcRXZ031800; Thu, 19 Jul 2012 09:38:28 -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 q6JEcPIh003813; Thu, 19 Jul 2012 20:08:27 +0530 (IST) Received: from dbdp32.itg.ti.com (172.24.170.251) by DBDE71.ent.ti.com (172.24.170.149) with Microsoft SMTP Server id 14.1.323.3; Thu, 19 Jul 2012 20:08:26 +0530 Received: from ula0393217.india.ti.com (smtpvbd.itg.ti.com [172.24.170.250]) by dbdp32.itg.ti.com (8.13.8/8.13.8) with ESMTP id q6JEcLWR030469; Thu, 19 Jul 2012 20:08:26 +0530 From: Shubhrajyoti D To: Subject: [PATCHv5 10/18] i2c: omap: ack IRQ in parts Date: Thu, 19 Jul 2012 20:08:00 +0530 Message-ID: <1342708688-2342-11-git-send-email-shubhrajyoti@ti.com> X-Mailer: git-send-email 1.7.5.4 In-Reply-To: <1342708688-2342-1-git-send-email-shubhrajyoti@ti.com> References: <1342708688-2342-1-git-send-email-shubhrajyoti@ti.com> MIME-Version: 1.0 X-Spam-Note: CRM114 invocation failed X-Spam-Score: -6.9 (------) X-Spam-Report: SpamAssassin version 3.3.2 on merlin.infradead.org summary: Content analysis details: (-6.9 points) pts rule name description ---- ---------------------- -------------------------------------------------- -5.0 RCVD_IN_DNSWL_HI RBL: Sender listed at http://www.dnswl.org/, high trust [198.47.26.152 listed in list.dnswl.org] -0.0 T_RP_MATCHES_RCVD Envelope sender domain matches handover relay domain -0.0 SPF_PASS SPF: sender matches SPF record -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] Cc: tony@atomide.com, w.sang@pengutronix.de, Felipe Balbi , linux-i2c@vger.kernel.org, ben-linux@fluff.org, Shubhrajyoti D , linux-arm-kernel@lists.infradead.org X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: linux-arm-kernel-bounces@lists.infradead.org Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org From: Felipe Balbi According to flow diagrams on OMAP TRMs, we should ACK the IRQ as they happen. Signed-off-by: Felipe Balbi [ack the stat OMAP_I2C_STAT_AL in case of arbitration lost] Signed-off-by: Shubhrajyoti D --- v5 - ack the OMAP_I2C_STAT_AL. drivers/i2c/busses/i2c-omap.c | 28 ++++++++++++++++------------ 1 files changed, 16 insertions(+), 12 deletions(-) diff --git a/drivers/i2c/busses/i2c-omap.c b/drivers/i2c/busses/i2c-omap.c index 78fc274..62ad126 100644 --- a/drivers/i2c/busses/i2c-omap.c +++ b/drivers/i2c/busses/i2c-omap.c @@ -847,21 +847,19 @@ omap_i2c_isr(int this_irq, void *dev_id) } complete: - /* - * Ack the stat in one go, but [R/X]DR and [R/X]RDY should be - * acked after the data operation is complete. - * Ref: TRM SWPU114Q Figure 18-31 - */ - omap_i2c_write_reg(dev, OMAP_I2C_STAT_REG, stat & - ~(OMAP_I2C_STAT_RRDY | OMAP_I2C_STAT_RDR | - OMAP_I2C_STAT_XRDY | OMAP_I2C_STAT_XDR)); - - if (stat & OMAP_I2C_STAT_NACK) + if (stat & OMAP_I2C_STAT_NACK) { err |= OMAP_I2C_STAT_NACK; + omap_i2c_ack_stat(dev, OMAP_I2C_STAT_NACK); + omap_i2c_complete_cmd(dev, err); + return IRQ_HANDLED; + } if (stat & OMAP_I2C_STAT_AL) { dev_err(dev->dev, "Arbitration lost\n"); err |= OMAP_I2C_STAT_AL; + omap_i2c_ack_stat(dev, OMAP_I2C_STAT_AL); + omap_i2c_complete_cmd(dev, err); + return IRQ_HANDLED; } /* @@ -938,12 +936,18 @@ complete: if (stat & OMAP_I2C_STAT_ROVR) { dev_err(dev->dev, "Receive overrun\n"); - dev->cmd_err |= OMAP_I2C_STAT_ROVR; + err |= OMAP_I2C_STAT_ROVR; + omap_i2c_ack_stat(dev, OMAP_I2C_STAT_ROVR); + omap_i2c_complete_cmd(dev, err); + return IRQ_HANDLED; } if (stat & OMAP_I2C_STAT_XUDF) { dev_err(dev->dev, "Transmit underflow\n"); - dev->cmd_err |= OMAP_I2C_STAT_XUDF; + err |= OMAP_I2C_STAT_XUDF; + omap_i2c_ack_stat(dev, OMAP_I2C_STAT_XUDF); + omap_i2c_complete_cmd(dev, err); + return IRQ_HANDLED; } } while (stat);