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=-10.0 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,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 A7DC5C433E0 for ; Tue, 23 Jun 2020 20:44:55 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 74BF721BE5 for ; Tue, 23 Jun 2020 20:44:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1592945095; bh=ayWTO8VHzqz9p3VnbCd0mRbHFFuvyRKBUrFM+f6HTXs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=JJIxUTw3HQZ19USmSO6axoqLq/drCR9Kg3kVVgXvoksNDDNp4dzOBYko6TH1wG3Jq hYbAvOPmBH6TWUSidiW8NaUBzndlI5QR0HHUhyJlsp8Uq2bcjtkBo28iSeVZbtf3ac oHy1BAw10pi+IrcEugBELZmM7GiQzhHjl2YhDnEA= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2392616AbgFWUot (ORCPT ); Tue, 23 Jun 2020 16:44:49 -0400 Received: from mail.kernel.org ([198.145.29.99]:42022 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2391610AbgFWUoo (ORCPT ); Tue, 23 Jun 2020 16:44:44 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id A29F121927; Tue, 23 Jun 2020 20:44:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1592945085; bh=ayWTO8VHzqz9p3VnbCd0mRbHFFuvyRKBUrFM+f6HTXs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=mKGmgKtGzoJDViCF58b4Rzp8CO5AAVEiSPaS/jjiT6hSoBW8Xj4CI4OccUFrBuFQQ /AF1hBoayHp2w+FnWM8cDJ4iKcD2iBQOlP604/fvLLiNQCMY8KiR4pDFH9DdcJP7jM gY8ycJiIcOKylYZyQPfmTTCgyP45i8YqhTwsC+LE= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Adam Honse , Jean Delvare , Sebastian Reichel , Wolfram Sang , Sasha Levin Subject: [PATCH 4.14 005/136] i2c: piix4: Detect secondary SMBus controller on AMD AM4 chipsets Date: Tue, 23 Jun 2020 21:57:41 +0200 Message-Id: <20200623195303.885163523@linuxfoundation.org> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20200623195303.601828702@linuxfoundation.org> References: <20200623195303.601828702@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Adam Honse [ Upstream commit f27237c174fd9653033330e4e532cd9d153ce824 ] The AMD X370 and other AM4 chipsets (A/B/X 3/4/5 parts) and Threadripper equivalents have a secondary SMBus controller at I/O port address 0x0B20. This bus is used by several manufacturers to control motherboard RGB lighting via embedded controllers. I have been using this bus in my OpenRGB project to control the Aura RGB on many motherboards and ASRock also uses this bus for their Polychrome RGB controller. I am not aware of any CZ-compatible platforms which do not have the second SMBus channel. All of AMD's AM4- and Threadripper- series chipsets that OpenRGB users have tested appear to have this secondary bus. I also noticed this secondary bus is present on older AMD platforms including my FM1 home server. Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=202587 Signed-off-by: Adam Honse Reviewed-by: Jean Delvare Reviewed-by: Sebastian Reichel Tested-by: Sebastian Reichel Signed-off-by: Wolfram Sang Signed-off-by: Sasha Levin --- drivers/i2c/busses/i2c-piix4.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/drivers/i2c/busses/i2c-piix4.c b/drivers/i2c/busses/i2c-piix4.c index 4b81dc231b18f..5345b731bb7cc 100644 --- a/drivers/i2c/busses/i2c-piix4.c +++ b/drivers/i2c/busses/i2c-piix4.c @@ -960,7 +960,8 @@ static int piix4_probe(struct pci_dev *dev, const struct pci_device_id *id) } if (dev->vendor == PCI_VENDOR_ID_AMD && - dev->device == PCI_DEVICE_ID_AMD_HUDSON2_SMBUS) { + (dev->device == PCI_DEVICE_ID_AMD_HUDSON2_SMBUS || + dev->device == PCI_DEVICE_ID_AMD_KERNCZ_SMBUS)) { retval = piix4_setup_sb800(dev, id, 1); } -- 2.25.1