From patchwork Tue Jan 27 10:50:30 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tomi Valkeinen X-Patchwork-Id: 5715881 Return-Path: X-Original-To: patchwork-linux-omap@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 759B1C058D for ; Tue, 27 Jan 2015 10:51:04 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id A79FB20212 for ; Tue, 27 Jan 2015 10:51:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C1C58201FE for ; Tue, 27 Jan 2015 10:51:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755907AbbA0KvA (ORCPT ); Tue, 27 Jan 2015 05:51:00 -0500 Received: from comal.ext.ti.com ([198.47.26.152]:60757 "EHLO comal.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755361AbbA0Ku6 (ORCPT ); Tue, 27 Jan 2015 05:50:58 -0500 Received: from dflxv15.itg.ti.com ([128.247.5.124]) by comal.ext.ti.com (8.13.7/8.13.7) with ESMTP id t0RAovbx028914; Tue, 27 Jan 2015 04:50:57 -0600 Received: from DLEE71.ent.ti.com (dlee71.ent.ti.com [157.170.170.114]) by dflxv15.itg.ti.com (8.14.3/8.13.8) with ESMTP id t0RAouEd026083; Tue, 27 Jan 2015 04:50:56 -0600 Received: from dlep32.itg.ti.com (157.170.170.100) by DLEE71.ent.ti.com (157.170.170.114) with Microsoft SMTP Server id 14.3.224.2; Tue, 27 Jan 2015 04:50:56 -0600 Received: from deskari.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by dlep32.itg.ti.com (8.14.3/8.13.8) with ESMTP id t0RAoqLV013652; Tue, 27 Jan 2015 04:50:55 -0600 From: Tomi Valkeinen To: , CC: Tomi Valkeinen Subject: [PATCH 02/14] OMAPDSS: PLL: add dss_pll_wait_reset_done() Date: Tue, 27 Jan 2015 12:50:30 +0200 Message-ID: <1422355842-11234-3-git-send-email-tomi.valkeinen@ti.com> X-Mailer: git-send-email 2.2.2 In-Reply-To: <1422355842-11234-1-git-send-email-tomi.valkeinen@ti.com> References: <1422355842-11234-1-git-send-email-tomi.valkeinen@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-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Add a helper function to wait until the PLL's reset is done. Signed-off-by: Tomi Valkeinen --- drivers/video/fbdev/omap2/dss/dss.h | 1 + drivers/video/fbdev/omap2/dss/pll.c | 10 ++++++++++ 2 files changed, 11 insertions(+) diff --git a/drivers/video/fbdev/omap2/dss/dss.h b/drivers/video/fbdev/omap2/dss/dss.h index 1826ee96265b..d6c9c3d3db14 100644 --- a/drivers/video/fbdev/omap2/dss/dss.h +++ b/drivers/video/fbdev/omap2/dss/dss.h @@ -453,5 +453,6 @@ int dss_pll_write_config_type_a(struct dss_pll *pll, const struct dss_pll_clock_info *cinfo); int dss_pll_write_config_type_b(struct dss_pll *pll, const struct dss_pll_clock_info *cinfo); +int dss_pll_wait_reset_done(struct dss_pll *pll); #endif diff --git a/drivers/video/fbdev/omap2/dss/pll.c b/drivers/video/fbdev/omap2/dss/pll.c index 335ffac224b9..f974ddcd3b6e 100644 --- a/drivers/video/fbdev/omap2/dss/pll.c +++ b/drivers/video/fbdev/omap2/dss/pll.c @@ -222,6 +222,16 @@ static int wait_for_bit_change(void __iomem *reg, int bitnum, int value) return !value; } +int dss_pll_wait_reset_done(struct dss_pll *pll) +{ + void __iomem *base = pll->base; + + if (wait_for_bit_change(base + PLL_STATUS, 0, 1) != 1) + return -ETIMEDOUT; + else + return 0; +} + static int dss_wait_hsdiv_ack(struct dss_pll *pll, u32 hsdiv_ack_mask) { int t = 100;