From patchwork Tue Apr 22 11:01:22 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Hans de Goede X-Patchwork-Id: 4030751 Return-Path: X-Original-To: patchwork-linux-mmc@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 3BFA2BFF02 for ; Tue, 22 Apr 2014 11:02:34 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 574BB2021B for ; Tue, 22 Apr 2014 11:02:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A15652021F for ; Tue, 22 Apr 2014 11:02:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755459AbaDVLCV (ORCPT ); Tue, 22 Apr 2014 07:02:21 -0400 Received: from mx1.redhat.com ([209.132.183.28]:15033 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755537AbaDVLCT (ORCPT ); Tue, 22 Apr 2014 07:02:19 -0400 Received: from int-mx09.intmail.prod.int.phx2.redhat.com (int-mx09.intmail.prod.int.phx2.redhat.com [10.5.11.22]) by mx1.redhat.com (8.14.4/8.14.4) with ESMTP id s3MB1mou032149 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 22 Apr 2014 07:01:48 -0400 Received: from shalem.localdomain.com (vpn1-7-194.ams2.redhat.com [10.36.7.194]) by int-mx09.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id s3MB1ct2019595; Tue, 22 Apr 2014 07:01:45 -0400 From: Hans de Goede To: Chris Ball , Ulf Hansson , Emilio Lopez , Mike Turquette Cc: =?UTF-8?q?David=20Lanzend=C3=B6rfer?= , Maxime Ripard , linux-mmc@vger.kernel.org, linux-arm-kernel@lists.infradead.org, devicetree , linux-sunxi@googlegroups.com, Hans de Goede Subject: [PATCH v8 02/17] clk: sunxi: Implement MMC phase control Date: Tue, 22 Apr 2014 13:01:22 +0200 Message-Id: <1398164497-14212-3-git-send-email-hdegoede@redhat.com> In-Reply-To: <1398164497-14212-1-git-send-email-hdegoede@redhat.com> References: <1398164497-14212-1-git-send-email-hdegoede@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.68 on 10.5.11.22 Sender: linux-mmc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-mmc@vger.kernel.org X-Spam-Status: No, score=-7.5 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, 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 From: Emilio López HdG: add header exporting clk_sunxi_mmc_phase_control Signed-off-by: Emilio López Signed-off-by: Hans de Goede --- drivers/clk/sunxi/clk-sunxi.c | 35 +++++++++++++++++++++++++++++++++++ include/linux/clk/sunxi.h | 22 ++++++++++++++++++++++ 2 files changed, 57 insertions(+) create mode 100644 include/linux/clk/sunxi.h diff --git a/drivers/clk/sunxi/clk-sunxi.c b/drivers/clk/sunxi/clk-sunxi.c index bd7dc73..7ee5eff 100644 --- a/drivers/clk/sunxi/clk-sunxi.c +++ b/drivers/clk/sunxi/clk-sunxi.c @@ -507,6 +507,41 @@ CLK_OF_DECLARE(sun7i_a20_gmac, "allwinner,sun7i-a20-gmac-clk", /** + * clk_sunxi_mmc_phase_control() - configures MMC clock phase control + */ + +void clk_sunxi_mmc_phase_control(struct clk_hw *hw, u8 sample, u8 output) +{ + #define to_clk_composite(_hw) container_of(_hw, struct clk_composite, hw) + #define to_clk_factors(_hw) container_of(_hw, struct clk_factors, hw) + + struct clk_composite *composite = to_clk_composite(hw); + struct clk_hw *rate_hw = composite->rate_hw; + struct clk_factors *factors = to_clk_factors(rate_hw); + unsigned long flags = 0; + u32 reg; + + if (factors->lock) + spin_lock_irqsave(factors->lock, flags); + + reg = readl(factors->reg); + + /* set sample clock phase control */ + reg &= ~(0x7 << 20); + reg |= ((sample & 0x7) << 20); + + /* set output clock phase control */ + reg &= ~(0x7 << 8); + reg |= ((output & 0x7) << 8); + + writel(reg, factors->reg); + + if (factors->lock) + spin_unlock_irqrestore(factors->lock, flags); +} + + +/** * sunxi_factors_clk_setup() - Setup function for factor clocks */ diff --git a/include/linux/clk/sunxi.h b/include/linux/clk/sunxi.h new file mode 100644 index 0000000..1ef5c89 --- /dev/null +++ b/include/linux/clk/sunxi.h @@ -0,0 +1,22 @@ +/* + * Copyright 2013 - Hans de Goede + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#ifndef __LINUX_CLK_SUNXI_H_ +#define __LINUX_CLK_SUNXI_H_ + +#include + +void clk_sunxi_mmc_phase_control(struct clk_hw *hw, u8 sample, u8 output); + +#endif