From patchwork Mon Mar 26 11:19:26 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tudor Ambarus X-Patchwork-Id: 890892 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=linux-i2c-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=microchip.com Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 408s9l5flQz9s1B for ; Mon, 26 Mar 2018 22:19:39 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751024AbeCZLTi (ORCPT ); Mon, 26 Mar 2018 07:19:38 -0400 Received: from esa6.microchip.iphmx.com ([216.71.154.253]:49435 "EHLO esa6.microchip.iphmx.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750984AbeCZLTh (ORCPT ); Mon, 26 Mar 2018 07:19:37 -0400 X-IronPort-AV: E=Sophos;i="5.48,364,1517900400"; d="scan'208";a="10023348" Received: from smtpout.microchip.com (HELO email.microchip.com) ([198.175.253.82]) by esa6.microchip.iphmx.com with ESMTP/TLS/DHE-RSA-AES256-SHA; 26 Mar 2018 04:19:37 -0700 Received: from localhost.localdomain.com (10.10.76.4) by chn-sv-exch07.mchp-main.com (10.10.76.108) with Microsoft SMTP Server id 14.3.352.0; Mon, 26 Mar 2018 04:19:36 -0700 From: Tudor Ambarus To: , , , , , CC: Tudor Ambarus Subject: [RFC PATCH 1/2] i2c: add bus_freq_hz in i2c_adapter Date: Mon, 26 Mar 2018 14:19:26 +0300 Message-ID: <20180326111927.16040-1-tudor.ambarus@microchip.com> X-Mailer: git-send-email 2.9.4 MIME-Version: 1.0 Sender: linux-i2c-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-i2c@vger.kernel.org The clock-frequency property is not mandatory for the i2c buses. If it's not present in device tree, the buses usually asume that it is 100kHZ. There are i2c clients that need to know the i2c bus frequency in order to compute their wake token. Spare the clients of making (wrong) assumptions and save the bus frequency in the i2c_adapter structure. Signed-off-by: Tudor Ambarus --- include/linux/i2c.h | 1 + 1 file changed, 1 insertion(+) diff --git a/include/linux/i2c.h b/include/linux/i2c.h index 44ad14e..7a1f26e 100644 --- a/include/linux/i2c.h +++ b/include/linux/i2c.h @@ -671,6 +671,7 @@ struct i2c_adapter { struct rt_mutex bus_lock; struct rt_mutex mux_lock; + u32 bus_freq_hz; int timeout; /* in jiffies */ int retries; struct device dev; /* the adapter device */