From patchwork Thu Jan 23 16:12:48 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alain Volmat X-Patchwork-Id: 205409 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=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU, 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 21495C2D0DB for ; Thu, 23 Jan 2020 16:13:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id EA23022522 for ; Thu, 23 Jan 2020 16:13:54 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=st.com header.i=@st.com header.b="aJcUKlUw" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728992AbgAWQNd (ORCPT ); Thu, 23 Jan 2020 11:13:33 -0500 Received: from mx08-00178001.pphosted.com ([91.207.212.93]:21420 "EHLO mx07-00178001.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1727847AbgAWQNc (ORCPT ); Thu, 23 Jan 2020 11:13:32 -0500 Received: from pps.filterd (m0046660.ppops.net [127.0.0.1]) by mx07-00178001.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 00NGCTX7000776; Thu, 23 Jan 2020 17:13:19 +0100 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=st.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-type; s=STMicroelectronics; bh=JTPct5LXQA3mJqzeacuXKjIY3sMmY9QNN0YZLD+ZEtM=; b=aJcUKlUwf2HwFFMQY2VHifs0MxGqv1BKr4F//QKKToFss5sjmQkP0KXXHPfCcWTlaika 3f0qvXtMD61qW50TjkHKWjknZ7BOfQaSYNayjnHxN5AKg5aWW6FMX6bqlJ643SsOt/Vg c8IYePwcOziA8Bkgd17O3ULrzID4Rxm8k7cPF4bycNXxyWUJvG3QHZRGcRBITgNx2202 +gl7hza7K5uKZj48fPl/8wccj7Rvcku/0eba3PPKiMs2cGb0Uy4QYFoNsAeX6UYw+g7z eFxExpBkArNWrDEvte8NawBBAGmiQPM5cKE89cg3p7KNN0QOouoftJfYTR26s0YpFL2M TA== Received: from beta.dmz-eu.st.com (beta.dmz-eu.st.com [164.129.1.35]) by mx07-00178001.pphosted.com with ESMTP id 2xkr1ebay8-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 23 Jan 2020 17:13:19 +0100 Received: from euls16034.sgp.st.com (euls16034.sgp.st.com [10.75.44.20]) by beta.dmz-eu.st.com (STMicroelectronics) with ESMTP id 98B9F100040; Thu, 23 Jan 2020 17:13:17 +0100 (CET) Received: from Webmail-eu.st.com (sfhdag3node2.st.com [10.75.127.8]) by euls16034.sgp.st.com (STMicroelectronics) with ESMTP id 8868F2BC7D6; Thu, 23 Jan 2020 17:13:17 +0100 (CET) Received: from localhost (10.75.127.48) by SFHDAG3NODE2.st.com (10.75.127.8) with Microsoft SMTP Server (TLS) id 15.0.1347.2; Thu, 23 Jan 2020 17:13:17 +0100 From: Alain Volmat To: , CC: , , , , , , , , , , Subject: [PATCH 3/5] i2c: i2c-stm32f7: add a new st, stm32mp15-i2c compatible Date: Thu, 23 Jan 2020 17:12:48 +0100 Message-ID: <1579795970-22319-4-git-send-email-alain.volmat@st.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1579795970-22319-1-git-send-email-alain.volmat@st.com> References: <1579795970-22319-1-git-send-email-alain.volmat@st.com> MIME-Version: 1.0 X-Originating-IP: [10.75.127.48] X-ClientProxiedBy: SFHDAG8NODE3.st.com (10.75.127.24) To SFHDAG3NODE2.st.com (10.75.127.8) X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.138, 18.0.572 definitions=2020-01-23_08:2020-01-23,2020-01-23 signatures=0 Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org Add a new stm32mp15 specific compatible to handle FastMode+ registers handling which is different on the stm32mp15 compared to the stm32f7 or stm32h7. Indeed, on the stm32mp15, the FastMode+ set and clear registers are separated while on the other platforms (F7 or H7) the control is done in a unique register. Signed-off-by: Alain Volmat --- drivers/i2c/busses/i2c-stm32f7.c | 41 +++++++++++++++++++++++++++++++++------- 1 file changed, 34 insertions(+), 7 deletions(-) diff --git a/drivers/i2c/busses/i2c-stm32f7.c b/drivers/i2c/busses/i2c-stm32f7.c index 1a3b3fa582ff..6bee9eca789f 100644 --- a/drivers/i2c/busses/i2c-stm32f7.c +++ b/drivers/i2c/busses/i2c-stm32f7.c @@ -223,6 +223,7 @@ struct stm32f7_i2c_spec { * @fall_time: Fall time (ns) * @dnf: Digital filter coefficient (0-16) * @analog_filter: Analog filter delay (On/Off) + * @fmp_clr_offset: Fast Mode Plus clear register offset from set register */ struct stm32f7_i2c_setup { enum stm32_i2c_speed speed; @@ -232,6 +233,7 @@ struct stm32f7_i2c_setup { u32 fall_time; u8 dnf; bool analog_filter; + u32 fmp_clr_offset; }; /** @@ -303,8 +305,9 @@ struct stm32f7_i2c_msg { * @dma: dma data * @use_dma: boolean to know if dma is used in the current transfer * @regmap: holds SYSCFG phandle for Fast Mode Plus bits - * @regmap_reg: register address for setting Fast Mode Plus bits - * @regmap_mask: mask for Fast Mode Plus bits in set register + * @regmap_sreg: register address for setting Fast Mode Plus bits + * @regmap_creg: register address for clearing Fast Mode Plus bits + * @regmap_mask: mask for Fast Mode Plus bits * @wakeup_src: boolean to know if the device is a wakeup source */ struct stm32f7_i2c_dev { @@ -328,7 +331,8 @@ struct stm32f7_i2c_dev { struct stm32_i2c_dma *dma; bool use_dma; struct regmap *regmap; - u32 regmap_reg; + u32 regmap_sreg; + u32 regmap_creg; u32 regmap_mask; bool wakeup_src; }; @@ -386,6 +390,14 @@ static const struct stm32f7_i2c_setup stm32f7_setup = { .analog_filter = STM32F7_I2C_ANALOG_FILTER_ENABLE, }; +static const struct stm32f7_i2c_setup stm32mp15_setup = { + .rise_time = STM32F7_I2C_RISE_TIME_DEFAULT, + .fall_time = STM32F7_I2C_FALL_TIME_DEFAULT, + .dnf = STM32F7_I2C_DNF_DEFAULT, + .analog_filter = STM32F7_I2C_ANALOG_FILTER_ENABLE, + .fmp_clr_offset = 0x40, +}; + static inline void stm32f7_i2c_set_bits(void __iomem *reg, u32 mask) { writel_relaxed(readl_relaxed(reg) | mask, reg); @@ -1822,15 +1834,26 @@ static int stm32f7_i2c_unreg_slave(struct i2c_client *slave) static int stm32f7_i2c_write_fm_plus_bits(struct stm32f7_i2c_dev *i2c_dev, bool enable) { + int ret; + if (i2c_dev->speed != STM32_I2C_SPEED_FAST_PLUS || IS_ERR_OR_NULL(i2c_dev->regmap)) { /* Optional */ return 0; } - return regmap_update_bits(i2c_dev->regmap, i2c_dev->regmap_reg, - i2c_dev->regmap_mask, - enable ? i2c_dev->regmap_mask : 0); + if (i2c_dev->regmap_sreg == i2c_dev->regmap_creg) + ret = regmap_update_bits(i2c_dev->regmap, + i2c_dev->regmap_sreg, + i2c_dev->regmap_mask, + enable ? i2c_dev->regmap_mask : 0); + else + ret = regmap_write(i2c_dev->regmap, + enable ? i2c_dev->regmap_sreg : + i2c_dev->regmap_creg, + i2c_dev->regmap_mask); + + return ret; } static int stm32f7_i2c_setup_fm_plus_bits(struct platform_device *pdev, @@ -1846,10 +1869,13 @@ static int stm32f7_i2c_setup_fm_plus_bits(struct platform_device *pdev, } ret = of_property_read_u32_index(np, "st,syscfg-fmp", 1, - &i2c_dev->regmap_reg); + &i2c_dev->regmap_sreg); if (ret) return ret; + i2c_dev->regmap_creg = i2c_dev->regmap_sreg + + i2c_dev->setup.fmp_clr_offset; + ret = of_property_read_u32_index(np, "st,syscfg-fmp", 2, &i2c_dev->regmap_mask); if (ret) @@ -2271,6 +2297,7 @@ static const struct dev_pm_ops stm32f7_i2c_pm_ops = { static const struct of_device_id stm32f7_i2c_match[] = { { .compatible = "st,stm32f7-i2c", .data = &stm32f7_setup}, + { .compatible = "st,stm32mp15-i2c", .data = &stm32mp15_setup}, {}, }; MODULE_DEVICE_TABLE(of, stm32f7_i2c_match);