From patchwork Thu Mar 12 21:12:31 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Prabhakar Mahadev Lad X-Patchwork-Id: 210653 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 0DC31C10DCE for ; Thu, 12 Mar 2020 21:13:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id DC4CC20674 for ; Thu, 12 Mar 2020 21:13:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726715AbgCLVNG (ORCPT ); Thu, 12 Mar 2020 17:13:06 -0400 Received: from relmlor2.renesas.com ([210.160.252.172]:33019 "EHLO relmlie6.idc.renesas.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726312AbgCLVNF (ORCPT ); Thu, 12 Mar 2020 17:13:05 -0400 X-IronPort-AV: E=Sophos;i="5.70,546,1574089200"; d="scan'208";a="41514819" Received: from unknown (HELO relmlir5.idc.renesas.com) ([10.200.68.151]) by relmlie6.idc.renesas.com with ESMTP; 13 Mar 2020 06:13:03 +0900 Received: from localhost.localdomain (unknown [10.226.36.204]) by relmlir5.idc.renesas.com (Postfix) with ESMTP id 4102B400C095; Fri, 13 Mar 2020 06:13:00 +0900 (JST) From: Lad Prabhakar To: Mauro Carvalho Chehab , Shawn Guo , Sascha Hauer , Pengutronix Kernel Team , Rob Herring , Mark Rutland , Sakari Ailus , NXP Linux Team , Magnus Damm , Ezequiel Garcia Cc: devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-renesas-soc@vger.kernel.org, Lad Prabhakar , Fabio Estevam , linux-media@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: [PATCH v2 2/3] media: i2c: ov5645: Switch to assigned-clock-rates Date: Thu, 12 Mar 2020 21:12:31 +0000 Message-Id: <1584047552-20166-3-git-send-email-prabhakar.mahadev-lad.rj@bp.renesas.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1584047552-20166-1-git-send-email-prabhakar.mahadev-lad.rj@bp.renesas.com> References: <1584047552-20166-1-git-send-email-prabhakar.mahadev-lad.rj@bp.renesas.com> Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org This patch switches to assigned-clock-rates for specifying the clock rate. The clk-conf.c internally handles setting the clock rate when assigned-clock-rates is passed. The driver now sets the clock frequency only if the deprecated property clock-frequency is defined instead assigned-clock-rates, this is to avoid breakage with existing DT binaries. Signed-off-by: Lad Prabhakar --- drivers/media/i2c/ov5645.c | 24 +++++++++++++++++------- 1 file changed, 17 insertions(+), 7 deletions(-) diff --git a/drivers/media/i2c/ov5645.c b/drivers/media/i2c/ov5645.c index a6c17d1..6cd16c5 100644 --- a/drivers/media/i2c/ov5645.c +++ b/drivers/media/i2c/ov5645.c @@ -1055,6 +1055,7 @@ static int ov5645_probe(struct i2c_client *client) struct device_node *endpoint; struct ov5645 *ov5645; u8 chip_id_high, chip_id_low; + bool set_clk = false; unsigned int i; u32 xclk_freq; int ret; @@ -1094,10 +1095,17 @@ static int ov5645_probe(struct i2c_client *client) return PTR_ERR(ov5645->xclk); } - ret = of_property_read_u32(dev->of_node, "clock-frequency", &xclk_freq); + ret = of_property_read_u32(dev->of_node, "assigned-clock-rates", + &xclk_freq); if (ret) { - dev_err(dev, "could not get xclk frequency\n"); - return ret; + /* check if deprecated property clock-frequency is defined */ + ret = of_property_read_u32(dev->of_node, "clock-frequency", + &xclk_freq); + if (ret) { + dev_err(dev, "could not get xclk frequency\n"); + return ret; + } + set_clk = true; } /* external clock must be 24MHz, allow 1% tolerance */ @@ -1107,10 +1115,12 @@ static int ov5645_probe(struct i2c_client *client) return -EINVAL; } - ret = clk_set_rate(ov5645->xclk, xclk_freq); - if (ret) { - dev_err(dev, "could not set xclk frequency\n"); - return ret; + if (set_clk) { + ret = clk_set_rate(ov5645->xclk, xclk_freq); + if (ret) { + dev_err(dev, "could not set xclk frequency\n"); + return ret; + } } for (i = 0; i < OV5645_NUM_SUPPLIES; i++)