From patchwork Thu Aug 17 09:45:13 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Huangzheng Lai X-Patchwork-Id: 714478 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9EA52C2FC0E for ; Thu, 17 Aug 2023 09:47:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1349458AbjHQJq4 (ORCPT ); Thu, 17 Aug 2023 05:46:56 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52822 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1349827AbjHQJqn (ORCPT ); Thu, 17 Aug 2023 05:46:43 -0400 Received: from SHSQR01.spreadtrum.com (unknown [222.66.158.135]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 07EE82D61; Thu, 17 Aug 2023 02:46:40 -0700 (PDT) Received: from dlp.unisoc.com ([10.29.3.86]) by SHSQR01.spreadtrum.com with ESMTP id 37H9kFjS085239; Thu, 17 Aug 2023 17:46:15 +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 4RRKpD0fTTz2Q0M6k; Thu, 17 Aug 2023 17:44:04 +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, 17 Aug 2023 17:46:14 +0800 From: Huangzheng Lai To: Andi Shyti CC: Orson Zhai , Baolin Wang , Chunyan Zhang , , , huangzheng lai , Huangzheng Lai , Xiongpeng Wu Subject: [PATCH 1/8] i2c: sprd: Add configurations that support 1Mhz and 3.4Mhz frequencies Date: Thu, 17 Aug 2023 17:45:13 +0800 Message-ID: <20230817094520.21286-2-Huangzheng.Lai@unisoc.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20230817094520.21286-1-Huangzheng.Lai@unisoc.com> References: <20230817094520.21286-1-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 37H9kFjS085239 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 | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/drivers/i2c/busses/i2c-sprd.c b/drivers/i2c/busses/i2c-sprd.c index ffc54fbf814d..acc2a4d4eeae 100644 --- a/drivers/i2c/busses/i2c-sprd.c +++ b/drivers/i2c/busses/i2c-sprd.c @@ -347,6 +347,10 @@ static void sprd_i2c_set_clk(struct sprd_i2c *i2c_dev, u32 freq) writel((6 * apb_clk) / 10000000, i2c_dev->base + ADDR_STA0_DVD); else if (freq == I2C_MAX_STANDARD_MODE_FREQ) writel((4 * apb_clk) / 1000000, i2c_dev->base + ADDR_STA0_DVD); + else if (freq == I2C_MAX_FAST_MODE_PLUS_FREQ) + writel((8 * apb_clk) / 10000000, i2c_dev->base + ADDR_STA0_DVD); + else if (freq == I2C_MAX_HIGH_SPEED_MODE_FREQ) + writel((8 * apb_clk) / 10000000, i2c_dev->base + ADDR_STA0_DVD); } static void sprd_i2c_enable(struct sprd_i2c *i2c_dev) @@ -519,9 +523,11 @@ 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);