From mboxrd@z Thu Jan 1 00:00:00 1970 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=-9.1 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_PASS,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 D05A7C10F0E for ; Mon, 15 Apr 2019 18:43:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 9DEDA2073F for ; Mon, 15 Apr 2019 18:43:34 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=synopsys.com header.i=@synopsys.com header.b="cQZzVKfd" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728238AbfDOSnd (ORCPT ); Mon, 15 Apr 2019 14:43:33 -0400 Received: from smtprelay2.synopsys.com ([198.182.60.111]:55492 "EHLO smtprelay.synopsys.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727913AbfDOSn3 (ORCPT ); Mon, 15 Apr 2019 14:43:29 -0400 Received: from mailhost1.synopsys.com (mailhost1.synopsys.com [10.12.238.239]) by smtprelay.synopsys.com (Postfix) with ESMTP id 90C0A10C128D; Mon, 15 Apr 2019 11:43:28 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=synopsys.com; s=mail; t=1555353808; bh=n6inYUl0YHNqBHgFN/exfZfs4AjaXGG9AEqyDA7rheA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:In-Reply-To: References:From; b=cQZzVKfd+n/2dfvFGDG6h39QJI2hl2FzbE88UblayWzoAnSLOfgVvs20ii/6gII1G 7QvHs2XJS1ElPfiBpz1dOFZxFMNz8GJdmQW+9urldkK6mqGWLHUwvat+MBwloB3Ne5 XFXHtPFJSaBUmRfU1inlYlsSwwDx2O2OKQrpR8/j6CulC7W9W/cxpGNeOgsUJi28u+ /JKoLvY/sHQbKevqDOkWynHeHyssU++MMXbf7HBwNTC29Je9Hkvgz8+WrCJMzOgSCn R6DONdpzCQ1+2Ad4yghEUgjDZ0U+9+4EZIkWVDQUmv2qnWsGHnxPRHvXTIJ3NCOE9E Hd3iGYtZKaTgA== Received: from de02dwia024.internal.synopsys.com (de02dwia024.internal.synopsys.com [10.225.19.81]) by mailhost1.synopsys.com (Postfix) with ESMTP id AEF455B65; Mon, 15 Apr 2019 11:42:57 -0700 (PDT) From: Vitor Soares To: vitor.soares@synopsys.com Cc: Vitor Soares , Boris Brezillon , linux-kernel@vger.kernel.org Subject: [PATCH 2/3] i3c: add mixed limited bus mode Date: Mon, 15 Apr 2019 20:42:46 +0200 Message-Id: X-Mailer: git-send-email 2.7.4 In-Reply-To: References: In-Reply-To: References: Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The i3c bus spec define a bus configuration where the i2c devices doesn't have the 50ns filter yet they allow the SDR max speed. This patch introduce the limited bus mode so the users can use a higher speed on presence of i2c devices index 1. Signed-off-by: Vitor Soares Cc: Boris Brezillon Cc: --- drivers/i3c/master.c | 5 +++++ include/linux/i3c/master.h | 5 +++++ 2 files changed, 10 insertions(+) diff --git a/drivers/i3c/master.c b/drivers/i3c/master.c index 1c4a86a..46d3774 100644 --- a/drivers/i3c/master.c +++ b/drivers/i3c/master.c @@ -463,6 +463,7 @@ static int i3c_bus_init(struct i3c_bus *i3cbus) static const char * const i3c_bus_mode_strings[] = { [I3C_BUS_MODE_PURE] = "pure", [I3C_BUS_MODE_MIXED_FAST] = "mixed-fast", + [I3C_BUS_MODE_MIXED_LIMITED] = "mixed-limited", [I3C_BUS_MODE_MIXED_SLOW] = "mixed-slow", }; @@ -575,6 +576,7 @@ int i3c_bus_set_mode(struct i3c_bus *i3cbus, enum i3c_bus_mode mode, i3cbus->scl_rate.i3c = I3C_BUS_TYP_I3C_SCL_RATE; break; case I3C_BUS_MODE_MIXED_FAST: + case I3C_BUS_MODE_MIXED_LIMITED: if (!i3cbus->scl_rate.i3c) i3cbus->scl_rate.i3c = I3C_BUS_TYP_I3C_SCL_RATE; if (!i3cbus->scl_rate.i2c) @@ -2481,6 +2483,9 @@ int i3c_master_register(struct i3c_master_controller *master, mode = I3C_BUS_MODE_MIXED_FAST; break; case I3C_LVR_I2C_INDEX(1): + if (mode < I3C_BUS_MODE_MIXED_LIMITED) + mode = I3C_BUS_MODE_MIXED_LIMITED; + break; case I3C_LVR_I2C_INDEX(2): if (mode < I3C_BUS_MODE_MIXED_SLOW) mode = I3C_BUS_MODE_MIXED_SLOW; diff --git a/include/linux/i3c/master.h b/include/linux/i3c/master.h index 44fb3cf..740235e 100644 --- a/include/linux/i3c/master.h +++ b/include/linux/i3c/master.h @@ -250,12 +250,17 @@ struct i3c_device { * the bus. The only impact in this mode is that the * high SCL pulse has to stay below 50ns to trick I2C * devices when transmitting I3C frames + * @I3C_BUS_MODE_MIXED_LIMITED: I2C devices without 50ns spike filter are + * present on the bus. However they allows + * compliance up to the maximum SDR SCL clock + * frequency. * @I3C_BUS_MODE_MIXED_SLOW: I2C devices without 50ns spike filter are present * on the bus */ enum i3c_bus_mode { I3C_BUS_MODE_PURE, I3C_BUS_MODE_MIXED_FAST, + I3C_BUS_MODE_MIXED_LIMITED, I3C_BUS_MODE_MIXED_SLOW, }; -- 2.7.4 From mboxrd@z Thu Jan 1 00:00:00 1970 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=-9.1 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_PASS,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 BEB24C10F0E for ; Mon, 15 Apr 2019 18:46:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8CBDB2087C for ; Mon, 15 Apr 2019 18:46:54 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=synopsys.com header.i=@synopsys.com header.b="QpHKQExW" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728746AbfDOSqx (ORCPT ); Mon, 15 Apr 2019 14:46:53 -0400 Received: from smtprelay2.synopsys.com ([198.182.60.111]:55706 "EHLO smtprelay.synopsys.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728721AbfDOSqv (ORCPT ); Mon, 15 Apr 2019 14:46:51 -0400 Received: from mailhost1.synopsys.com (mailhost1.synopsys.com [10.12.238.239]) by smtprelay.synopsys.com (Postfix) with ESMTP id F26BD10C1084; Mon, 15 Apr 2019 11:46:50 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=synopsys.com; s=mail; t=1555354011; bh=n6inYUl0YHNqBHgFN/exfZfs4AjaXGG9AEqyDA7rheA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:In-Reply-To: References:From; b=QpHKQExWp3HSwvCwZXncuLsmdtCh2MQEaJaSugUeYLVOSYURwQVR1QA1sqJJUh+zf MXeEwMIywkkCMI+TFz+gsJFQdbLRZv04ZfqvyZQLYlEv3Id9iWF8TZbeHb5RM9UsBG D+BwF7fRuwhfeh9faRHmILIwpPTcqL7eTu3e5ZWNGw9rjALwt59jK2wWgLOFq/nc78 +6hf5wGP5pZngNIc+3gaGjIwyBYh4p42i5nIhEkJ9bYNMsMVGKEPzjICBK0wm9o2aX l+YCO+QYPv0hC81OsBo3i9eIQ219Lr+2BgBXaM8d/ekXsnhaIRCcvqpzl1FdUJ/wfO BFFe0XEolDKVQ== Received: from de02dwia024.internal.synopsys.com (de02dwia024.internal.synopsys.com [10.225.19.81]) by mailhost1.synopsys.com (Postfix) with ESMTP id AF22E5B73; Mon, 15 Apr 2019 11:46:49 -0700 (PDT) From: Vitor Soares To: linux-i3c@lists.infradead.org Cc: joao.pinto@synopsys.com, Vitor Soares , Boris Brezillon , linux-kernel@vger.kernel.org Subject: [PATCH 2/3] i3c: add mixed limited bus mode Date: Mon, 15 Apr 2019 20:46:42 +0200 Message-Id: X-Mailer: git-send-email 2.7.4 In-Reply-To: References: In-Reply-To: References: Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="UTF-8" Message-ID: <20190415184642.i4sySk3srwMC6wLc5oddNlOOLk-VE7f8sAASRHmUQlo@z> The i3c bus spec define a bus configuration where the i2c devices doesn't have the 50ns filter yet they allow the SDR max speed. This patch introduce the limited bus mode so the users can use a higher speed on presence of i2c devices index 1. Signed-off-by: Vitor Soares Cc: Boris Brezillon Cc: --- drivers/i3c/master.c | 5 +++++ include/linux/i3c/master.h | 5 +++++ 2 files changed, 10 insertions(+) diff --git a/drivers/i3c/master.c b/drivers/i3c/master.c index 1c4a86a..46d3774 100644 --- a/drivers/i3c/master.c +++ b/drivers/i3c/master.c @@ -463,6 +463,7 @@ static int i3c_bus_init(struct i3c_bus *i3cbus) static const char * const i3c_bus_mode_strings[] = { [I3C_BUS_MODE_PURE] = "pure", [I3C_BUS_MODE_MIXED_FAST] = "mixed-fast", + [I3C_BUS_MODE_MIXED_LIMITED] = "mixed-limited", [I3C_BUS_MODE_MIXED_SLOW] = "mixed-slow", }; @@ -575,6 +576,7 @@ int i3c_bus_set_mode(struct i3c_bus *i3cbus, enum i3c_bus_mode mode, i3cbus->scl_rate.i3c = I3C_BUS_TYP_I3C_SCL_RATE; break; case I3C_BUS_MODE_MIXED_FAST: + case I3C_BUS_MODE_MIXED_LIMITED: if (!i3cbus->scl_rate.i3c) i3cbus->scl_rate.i3c = I3C_BUS_TYP_I3C_SCL_RATE; if (!i3cbus->scl_rate.i2c) @@ -2481,6 +2483,9 @@ int i3c_master_register(struct i3c_master_controller *master, mode = I3C_BUS_MODE_MIXED_FAST; break; case I3C_LVR_I2C_INDEX(1): + if (mode < I3C_BUS_MODE_MIXED_LIMITED) + mode = I3C_BUS_MODE_MIXED_LIMITED; + break; case I3C_LVR_I2C_INDEX(2): if (mode < I3C_BUS_MODE_MIXED_SLOW) mode = I3C_BUS_MODE_MIXED_SLOW; diff --git a/include/linux/i3c/master.h b/include/linux/i3c/master.h index 44fb3cf..740235e 100644 --- a/include/linux/i3c/master.h +++ b/include/linux/i3c/master.h @@ -250,12 +250,17 @@ struct i3c_device { * the bus. The only impact in this mode is that the * high SCL pulse has to stay below 50ns to trick I2C * devices when transmitting I3C frames + * @I3C_BUS_MODE_MIXED_LIMITED: I2C devices without 50ns spike filter are + * present on the bus. However they allows + * compliance up to the maximum SDR SCL clock + * frequency. * @I3C_BUS_MODE_MIXED_SLOW: I2C devices without 50ns spike filter are present * on the bus */ enum i3c_bus_mode { I3C_BUS_MODE_PURE, I3C_BUS_MODE_MIXED_FAST, + I3C_BUS_MODE_MIXED_LIMITED, I3C_BUS_MODE_MIXED_SLOW, }; -- 2.7.4