From patchwork Wed Jan 16 14:43:33 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Roger Quadros X-Patchwork-Id: 1988691 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 DAA6B3FDD1 for ; Wed, 16 Jan 2013 14:48:20 +0000 (UTC) Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.76 #1 (Red Hat Linux)) id 1TvUEC-0004Pd-2H; Wed, 16 Jan 2013 14:44:32 +0000 Received: from arroyo.ext.ti.com ([192.94.94.40]) by merlin.infradead.org with esmtps (Exim 4.76 #1 (Red Hat Linux)) id 1TvUDt-0004L7-PD for linux-arm-kernel@lists.infradead.org; Wed, 16 Jan 2013 14:44:16 +0000 Received: from dlelxv30.itg.ti.com ([172.17.2.17]) by arroyo.ext.ti.com (8.13.7/8.13.7) with ESMTP id r0GEi6Oh010305; Wed, 16 Jan 2013 08:44:06 -0600 Received: from DFLE72.ent.ti.com (dfle72.ent.ti.com [128.247.5.109]) by dlelxv30.itg.ti.com (8.13.8/8.13.8) with ESMTP id r0GEi6eM001132; Wed, 16 Jan 2013 08:44:06 -0600 Received: from dlelxv22.itg.ti.com (172.17.1.197) by dfle72.ent.ti.com (128.247.5.109) with Microsoft SMTP Server id 14.1.323.3; Wed, 16 Jan 2013 08:44:05 -0600 Received: from rockdesk.itg.ti.com (h115-77.vpn.ti.com [172.24.115.77]) by dlelxv22.itg.ti.com (8.13.8/8.13.8) with ESMTP id r0GEhsuc021177; Wed, 16 Jan 2013 08:44:02 -0600 From: Roger Quadros To: , , Subject: [PATCH v6 02/22] mfd: omap-usb-tll: Fix channel count detection Date: Wed, 16 Jan 2013 16:43:33 +0200 Message-ID: <1358347433-329-3-git-send-email-rogerq@ti.com> X-Mailer: git-send-email 1.7.4.1 In-Reply-To: <1358347433-329-1-git-send-email-rogerq@ti.com> References: <1358347433-329-1-git-send-email-rogerq@ti.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20130116_094414_200856_60ED04B7 X-CRM114-Status: GOOD ( 10.21 ) X-Spam-Score: -7.6 (-------) X-Spam-Report: SpamAssassin version 3.3.2 on merlin.infradead.org summary: Content analysis details: (-7.6 points) pts rule name description ---- ---------------------- -------------------------------------------------- -5.0 RCVD_IN_DNSWL_HI RBL: Sender listed at http://www.dnswl.org/, high trust [192.94.94.40 listed in list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record -0.7 RP_MATCHES_RCVD Envelope sender domain matches handover relay domain -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] Cc: sshtylyov@mvista.com, linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, kishon@ti.com, bjorn@mork.no, linux-arm-kernel@lists.infradead.org, rogerq@ti.com 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 Fix channel count detecion for REV2. Also, don't give up if we don't recognize the IP Revision. We assume the default number of channels (i.e. 3) for unrecognized IPs. Signed-off-by: Roger Quadros --- drivers/mfd/omap-usb-tll.c | 20 +++++++++++--------- 1 files changed, 11 insertions(+), 9 deletions(-) diff --git a/drivers/mfd/omap-usb-tll.c b/drivers/mfd/omap-usb-tll.c index e459489..9658e18 100644 --- a/drivers/mfd/omap-usb-tll.c +++ b/drivers/mfd/omap-usb-tll.c @@ -98,6 +98,7 @@ struct usbtll_omap { struct clk *usbtll_p1_fck; struct clk *usbtll_p2_fck; + int nch; /* num. of channels */ struct usbhs_omap_platform_data *pdata; /* secure the register updates */ spinlock_t lock; @@ -210,7 +211,7 @@ static int usbtll_omap_probe(struct platform_device *pdev) unsigned reg; unsigned long flags; int ret = 0; - int i, ver, count; + int i, ver; dev_dbg(dev, "starting TI HSUSB TLL Controller\n"); @@ -262,16 +263,18 @@ static int usbtll_omap_probe(struct platform_device *pdev) ver = usbtll_read(base, OMAP_USBTLL_REVISION); switch (ver) { case OMAP_USBTLL_REV1: - case OMAP_USBTLL_REV2: - count = OMAP_TLL_CHANNEL_COUNT; + tll->nch = OMAP_TLL_CHANNEL_COUNT; break; + case OMAP_USBTLL_REV2: case OMAP_USBTLL_REV3: - count = OMAP_REV2_TLL_CHANNEL_COUNT; + tll->nch = OMAP_REV2_TLL_CHANNEL_COUNT; break; default: - dev_err(dev, "TLL version failed\n"); - ret = -ENODEV; - goto err_ioremap; + tll->nch = OMAP_TLL_CHANNEL_COUNT; + dev_dbg(dev, + "USB TLL Rev : 0x%x not recognized, assuming %d channels\n", + ver, tll->nch); + break; } if (is_ehci_tll_mode(pdata->port_mode[0]) || @@ -291,7 +294,7 @@ static int usbtll_omap_probe(struct platform_device *pdev) usbtll_write(base, OMAP_TLL_SHARED_CONF, reg); /* Enable channels now */ - for (i = 0; i < count; i++) { + for (i = 0; i < tll->nch; i++) { reg = usbtll_read(base, OMAP_TLL_CHANNEL_CONF(i)); if (is_ohci_port(pdata->port_mode[i])) { @@ -319,7 +322,6 @@ static int usbtll_omap_probe(struct platform_device *pdev) } } -err_ioremap: spin_unlock_irqrestore(&tll->lock, flags); iounmap(base); pm_runtime_put_sync(dev);