From patchwork Thu Sep 21 08:54:51 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Huangzheng Lai X-Patchwork-Id: 1837802 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@legolas.ozlabs.org Authentication-Results: legolas.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=2620:137:e000::1:20; helo=out1.vger.email; envelope-from=linux-i2c-owner@vger.kernel.org; receiver=patchwork.ozlabs.org) Received: from out1.vger.email (out1.vger.email [IPv6:2620:137:e000::1:20]) by legolas.ozlabs.org (Postfix) with ESMTP id 4Rs60W5Q6lz1yhR for ; Fri, 22 Sep 2023 06:08:27 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229716AbjIUUI3 (ORCPT ); Thu, 21 Sep 2023 16:08:29 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46618 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231462AbjIUT7o (ORCPT ); Thu, 21 Sep 2023 15:59:44 -0400 Received: from SHSQR01.spreadtrum.com (unknown [222.66.158.135]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 30DF456D3A; Thu, 21 Sep 2023 10:18:27 -0700 (PDT) Received: from SHSQR01.spreadtrum.com (localhost [127.0.0.2] (may be forged)) by SHSQR01.spreadtrum.com with ESMTP id 38L8vCPM047518; Thu, 21 Sep 2023 16:57:12 +0800 (+08) (envelope-from Huangzheng.Lai@unisoc.com) Received: from dlp.unisoc.com ([10.29.3.86]) by SHSQR01.spreadtrum.com with ESMTP id 38L8tTPm040533; Thu, 21 Sep 2023 16:55:29 +0800 (+08) (envelope-from Huangzheng.Lai@unisoc.com) Received: from SHDLP.spreadtrum.com (shmbx04.spreadtrum.com [10.0.1.214]) by dlp.unisoc.com (SkyGuard) with ESMTPS id 4Rrq093gD3z2SZtbS; Thu, 21 Sep 2023 16:52:09 +0800 (CST) Received: from xm9614pcu.spreadtrum.com (10.13.2.29) by shmbx04.spreadtrum.com (10.0.1.214) with Microsoft SMTP Server (TLS) id 15.0.1497.23; Thu, 21 Sep 2023 16:55:28 +0800 From: Huangzheng Lai To: Andi Shyti CC: Orson Zhai , Baolin Wang , Chunyan Zhang , , , huangzheng lai , Huangzheng Lai , Xiongpeng Wu Subject: [PATCH V2 1/7] i2c: sprd: Add configurations that support 1Mhz and 3.4Mhz frequencies Date: Thu, 21 Sep 2023 16:54:51 +0800 Message-ID: <20230921085457.32446-2-Huangzheng.Lai@unisoc.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20230921085457.32446-1-Huangzheng.Lai@unisoc.com> References: <20230921085457.32446-1-Huangzheng.Lai@unisoc.com> MIME-Version: 1.0 X-Originating-IP: [10.13.2.29] X-ClientProxiedBy: SHCAS03.spreadtrum.com (10.0.1.207) To shmbx04.spreadtrum.com (10.0.1.214) X-MAIL: SHSQR01.spreadtrum.com 38L8tTPm040533 X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,SPF_HELO_NONE, SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-i2c@vger.kernel.org This patch adds I2C controller driver support for 1Mhz and 3.4Mhz frequency configurations. Signed-off-by: Huangzheng Lai Acked-by: Andi Shyti --- drivers/i2c/busses/i2c-sprd.c | 25 ++++++++++++++++++++----- 1 file changed, 20 insertions(+), 5 deletions(-) diff --git a/drivers/i2c/busses/i2c-sprd.c b/drivers/i2c/busses/i2c-sprd.c index ffc54fbf814d..b44916c6741d 100644 --- a/drivers/i2c/busses/i2c-sprd.c +++ b/drivers/i2c/busses/i2c-sprd.c @@ -343,10 +343,23 @@ static void sprd_i2c_set_clk(struct sprd_i2c *i2c_dev, u32 freq) writel(div1, i2c_dev->base + ADDR_DVD1); /* Start hold timing = hold time(us) * source clock */ - if (freq == I2C_MAX_FAST_MODE_FREQ) - writel((6 * apb_clk) / 10000000, i2c_dev->base + ADDR_STA0_DVD); - else if (freq == I2C_MAX_STANDARD_MODE_FREQ) + switch (freq) { + case I2C_MAX_STANDARD_MODE_FREQ: writel((4 * apb_clk) / 1000000, i2c_dev->base + ADDR_STA0_DVD); + break; + case I2C_MAX_FAST_MODE_FREQ: + writel((6 * apb_clk) / 10000000, i2c_dev->base + ADDR_STA0_DVD); + break; + case I2C_MAX_FAST_MODE_PLUS_FREQ: + writel((8 * apb_clk) / 10000000, i2c_dev->base + ADDR_STA0_DVD); + break; + case I2C_MAX_HIGH_SPEED_MODE_FREQ: + writel((8 * apb_clk) / 10000000, i2c_dev->base + ADDR_STA0_DVD); + break; + default: + dev_err(i2c_dev->dev, "Unsupported frequency: %d\n", freq); + break; + } } static void sprd_i2c_enable(struct sprd_i2c *i2c_dev) @@ -519,9 +532,11 @@ static int sprd_i2c_probe(struct platform_device *pdev) if (!of_property_read_u32(dev->of_node, "clock-frequency", &prop)) i2c_dev->bus_freq = prop; - /* We only support 100k and 400k now, otherwise will return error. */ + /* We only support 100k\400k\1m\3.4m now, otherwise will return error. */ if (i2c_dev->bus_freq != I2C_MAX_STANDARD_MODE_FREQ && - i2c_dev->bus_freq != I2C_MAX_FAST_MODE_FREQ) + i2c_dev->bus_freq != I2C_MAX_FAST_MODE_FREQ && + i2c_dev->bus_freq != I2C_MAX_FAST_MODE_PLUS_FREQ && + i2c_dev->bus_freq != I2C_MAX_HIGH_SPEED_MODE_FREQ) return -EINVAL; ret = sprd_i2c_clk_init(i2c_dev);