From patchwork Tue Mar 30 13:05:47 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yicong Yang X-Patchwork-Id: 412031 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=-13.9 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,UNWANTED_LANGUAGE_BODY, URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham 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 8287BC433E5 for ; Tue, 30 Mar 2021 13:09:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4D430619CE for ; Tue, 30 Mar 2021 13:09:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232154AbhC3NJA (ORCPT ); Tue, 30 Mar 2021 09:09:00 -0400 Received: from szxga06-in.huawei.com ([45.249.212.32]:15400 "EHLO szxga06-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232083AbhC3NIc (ORCPT ); Tue, 30 Mar 2021 09:08:32 -0400 Received: from DGGEMS412-HUB.china.huawei.com (unknown [172.30.72.59]) by szxga06-in.huawei.com (SkyGuard) with ESMTP id 4F8qTg5fPRznTlP; Tue, 30 Mar 2021 21:06:47 +0800 (CST) Received: from localhost.localdomain (10.67.165.24) by DGGEMS412-HUB.china.huawei.com (10.3.19.212) with Microsoft SMTP Server id 14.3.498.0; Tue, 30 Mar 2021 21:08:18 +0800 From: Yicong Yang To: , CC: , , , , , , , , , Subject: [PATCH v4 2/4] i2c: core: add api to provide frequency mode strings Date: Tue, 30 Mar 2021 21:05:47 +0800 Message-ID: <1617109549-4013-3-git-send-email-yangyicong@hisilicon.com> X-Mailer: git-send-email 2.8.1 In-Reply-To: <1617109549-4013-1-git-send-email-yangyicong@hisilicon.com> References: <1617109549-4013-1-git-send-email-yangyicong@hisilicon.com> MIME-Version: 1.0 X-Originating-IP: [10.67.165.24] X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-i2c@vger.kernel.org Some I2C drivers like Designware and HiSilicon will print the bus frequency mode information, so add a public one that everyone can make use of. Signed-off-by: Yicong Yang Reviewed-by: Andy Shevchenko --- include/linux/i2c.h | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) diff --git a/include/linux/i2c.h b/include/linux/i2c.h index 10bd0b0..6837e64 100644 --- a/include/linux/i2c.h +++ b/include/linux/i2c.h @@ -47,6 +47,26 @@ typedef int (*i2c_slave_cb_t)(struct i2c_client *client, #define I2C_MAX_HIGH_SPEED_MODE_FREQ 3400000 #define I2C_MAX_ULTRA_FAST_MODE_FREQ 5000000 +static inline const char *i2c_freq_mode_string(u32 bus_freq_hz) +{ + switch (bus_freq_hz) { + case I2C_MAX_STANDARD_MODE_FREQ: + return "Standard Mode(100KHz)"; + case I2C_MAX_FAST_MODE_FREQ: + return "Fast Mode(400KHz)"; + case I2C_MAX_FAST_MODE_PLUS_FREQ: + return "Fast Mode Plus(1.0MHz)"; + case I2C_MAX_TURBO_MODE_FREQ: + return "Turbo Mode(1.4MHz)"; + case I2C_MAX_HIGH_SPEED_MODE_FREQ: + return "High Speed Mode(3.4MHz)"; + case I2C_MAX_ULTRA_FAST_MODE_FREQ: + return "Ultra Fast Mode(5.0MHz)"; + default: + return "Unknown Mode"; + } +} + struct module; struct property_entry;