From patchwork Tue Sep 26 11:37:25 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jean Delvare X-Patchwork-Id: 1839622 X-Patchwork-Delegate: wolfram@the-dreams.de Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@legolas.ozlabs.org Authentication-Results: legolas.ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=suse.de header.i=@suse.de header.a=rsa-sha256 header.s=susede2_rsa header.b=YDU1yeEL; dkim=pass header.d=suse.de header.i=@suse.de header.a=ed25519-sha256 header.s=susede2_ed25519 header.b=b5xYq3ui; dkim-atps=neutral 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 4RvyQm495Bz1ypD for ; Tue, 26 Sep 2023 21:37:36 +1000 (AEST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229845AbjIZLhh (ORCPT ); Tue, 26 Sep 2023 07:37:37 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45480 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232954AbjIZLhg (ORCPT ); Tue, 26 Sep 2023 07:37:36 -0400 Received: from smtp-out2.suse.de (smtp-out2.suse.de [195.135.220.29]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0CA23E9 for ; Tue, 26 Sep 2023 04:37:28 -0700 (PDT) Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by smtp-out2.suse.de (Postfix) with ESMTPS id B10521F74C; Tue, 26 Sep 2023 11:37:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1695728246; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=w2l/DwtBBXLIOdwZMsTEllqqwHC2f40Phf3VMYAm2bw=; b=YDU1yeELvu26dRKfPNTyd8m4g8O8M0u8aAdaz16UTnGchg9x9Co/bxIqiYqwP/HaWrUzSv 8i/etCRcAIZYdX+Manfs8jfd1L5lFGRCNCXXPjEzK7D8glXKkulOkp/dz3jpPD+4lMYxgy GCAHeXMNBgr5ISBVn2cz8LEA5g9gves= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1695728246; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=w2l/DwtBBXLIOdwZMsTEllqqwHC2f40Phf3VMYAm2bw=; b=b5xYq3uioAViM/+AxuxE9jyuppm/7/y2qRkLE2jHnJCQPDc+rENtRIj5Y1EA9twfUSyZdn 3WkuQ20k1vjPACDg== Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by imap2.suse-dmz.suse.de (Postfix) with ESMTPS id 8AA4D1390B; Tue, 26 Sep 2023 11:37:26 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id RwJUIHbCEmUNdQAAMHmgww (envelope-from ); Tue, 26 Sep 2023 11:37:26 +0000 Date: Tue, 26 Sep 2023 13:37:25 +0200 From: Jean Delvare To: Linux I2C Cc: Andi Shyti , Nick Desaulniers Subject: [PATCH] i2c: Drop legacy muxing pseudo-drivers Message-ID: <20230926133725.5c3fb96e@endymion.delvare> Organization: SUSE Linux X-Mailer: Claws Mail 4.0.0 (GTK+ 3.24.34; x86_64-suse-linux-gnu) MIME-Version: 1.0 X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_BLOCKED, 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 The i2c-amd756-s4882 and i2c-nforce2-s4985 muxing pseudo-drivers were written at a time when the i2c core did not support muxing. They are essentially board-specific hacks. If we had to add support for these boards today, we would implement it in a completely different way. These Tyan server boards are 18 years old by now, so I very much doubt any of these is still running today. So let's just drop this clumsy code. If anyone really still needs this support and complains, I'll rewrite it in a proper way on top of i2c-mux. This also fixes the following warnings: drivers/i2c/busses/i2c-amd756.c:286:20: warning: symbol 'amd756_smbus' was not declared. Should it be static? drivers/i2c/busses/i2c-nforce2.c:123:20: warning: symbol 'nforce2_smbus' was not declared. Should it be static? Signed-off-by: Jean Delvare Cc: Andi Shyti Cc: Nick Desaulniers Acked-by: Nick Desaulniers --- MAINTAINERS | 2 drivers/i2c/busses/Kconfig | 26 --- drivers/i2c/busses/Makefile | 2 drivers/i2c/busses/i2c-amd756-s4882.c | 245 --------------------------------- drivers/i2c/busses/i2c-amd756.c | 4 drivers/i2c/busses/i2c-nforce2-s4985.c | 240 -------------------------------- drivers/i2c/busses/i2c-nforce2.c | 16 -- 7 files changed, 1 insertion(+), 534 deletions(-) --- linux-6.5.orig/MAINTAINERS +++ linux-6.5/MAINTAINERS @@ -9779,12 +9779,10 @@ F: Documentation/i2c/busses/i2c-viapro.r F: drivers/i2c/busses/i2c-ali1535.c F: drivers/i2c/busses/i2c-ali1563.c F: drivers/i2c/busses/i2c-ali15x3.c -F: drivers/i2c/busses/i2c-amd756-s4882.c F: drivers/i2c/busses/i2c-amd756.c F: drivers/i2c/busses/i2c-amd8111.c F: drivers/i2c/busses/i2c-i801.c F: drivers/i2c/busses/i2c-isch.c -F: drivers/i2c/busses/i2c-nforce2-s4985.c F: drivers/i2c/busses/i2c-nforce2.c F: drivers/i2c/busses/i2c-piix4.c F: drivers/i2c/busses/i2c-sis5595.c --- linux-6.5.orig/drivers/i2c/busses/Kconfig +++ linux-6.5/drivers/i2c/busses/Kconfig @@ -62,19 +62,6 @@ config I2C_AMD756 This driver can also be built as a module. If so, the module will be called i2c-amd756. -config I2C_AMD756_S4882 - tristate "SMBus multiplexing on the Tyan S4882" - depends on I2C_AMD756 && X86 - help - Enabling this option will add specific SMBus support for the Tyan - S4882 motherboard. On this 4-CPU board, the SMBus is multiplexed - over 8 different channels, where the various memory module EEPROMs - and temperature sensors live. Saying yes here will give you access - to these in addition to the trunk. - - This driver can also be built as a module. If so, the module - will be called i2c-amd756-s4882. - config I2C_AMD8111 tristate "AMD 8111" depends on PCI @@ -248,19 +235,6 @@ config I2C_NFORCE2 This driver can also be built as a module. If so, the module will be called i2c-nforce2. -config I2C_NFORCE2_S4985 - tristate "SMBus multiplexing on the Tyan S4985" - depends on I2C_NFORCE2 && X86 - help - Enabling this option will add specific SMBus support for the Tyan - S4985 motherboard. On this 4-CPU board, the SMBus is multiplexed - over 4 different channels, where the various memory module EEPROMs - live. Saying yes here will give you access to these in addition - to the trunk. - - This driver can also be built as a module. If so, the module - will be called i2c-nforce2-s4985. - config I2C_NVIDIA_GPU tristate "NVIDIA GPU I2C controller" depends on PCI --- linux-6.5.orig/drivers/i2c/busses/Makefile +++ linux-6.5/drivers/i2c/busses/Makefile @@ -14,7 +14,6 @@ obj-$(CONFIG_I2C_ALI1535) += i2c-ali1535 obj-$(CONFIG_I2C_ALI1563) += i2c-ali1563.o obj-$(CONFIG_I2C_ALI15X3) += i2c-ali15x3.o obj-$(CONFIG_I2C_AMD756) += i2c-amd756.o -obj-$(CONFIG_I2C_AMD756_S4882) += i2c-amd756-s4882.o obj-$(CONFIG_I2C_AMD8111) += i2c-amd8111.o obj-$(CONFIG_I2C_CHT_WC) += i2c-cht-wc.o obj-$(CONFIG_I2C_I801) += i2c-i801.o @@ -22,7 +21,6 @@ obj-$(CONFIG_I2C_ISCH) += i2c-isch.o obj-$(CONFIG_I2C_ISMT) += i2c-ismt.o obj-$(CONFIG_I2C_NCT6793) += i2c-nct6793.o obj-$(CONFIG_I2C_NFORCE2) += i2c-nforce2.o -obj-$(CONFIG_I2C_NFORCE2_S4985) += i2c-nforce2-s4985.o obj-$(CONFIG_I2C_NVIDIA_GPU) += i2c-nvidia-gpu.o obj-$(CONFIG_I2C_PIIX4) += i2c-piix4.o obj-$(CONFIG_I2C_SIS5595) += i2c-sis5595.o --- linux-6.5.orig/drivers/i2c/busses/i2c-amd756-s4882.c +++ /dev/null @@ -1,245 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-or-later -/* - * i2c-amd756-s4882.c - i2c-amd756 extras for the Tyan S4882 motherboard - * - * Copyright (C) 2004, 2008 Jean Delvare - */ - -/* - * We select the channels by sending commands to the Philips - * PCA9556 chip at I2C address 0x18. The main adapter is used for - * the non-multiplexed part of the bus, and 4 virtual adapters - * are defined for the multiplexed addresses: 0x50-0x53 (memory - * module EEPROM) located on channels 1-4, and 0x4c (LM63) - * located on multiplexed channels 0 and 5-7. We define one - * virtual adapter per CPU, which corresponds to two multiplexed - * channels: - * CPU0: virtual adapter 1, channels 1 and 0 - * CPU1: virtual adapter 2, channels 2 and 5 - * CPU2: virtual adapter 3, channels 3 and 6 - * CPU3: virtual adapter 4, channels 4 and 7 - */ - -#include -#include -#include -#include -#include -#include - -extern struct i2c_adapter amd756_smbus; - -static struct i2c_adapter *s4882_adapter; -static struct i2c_algorithm *s4882_algo; - -/* Wrapper access functions for multiplexed SMBus */ -static DEFINE_MUTEX(amd756_lock); - -static s32 amd756_access_virt0(struct i2c_adapter * adap, u16 addr, - unsigned short flags, char read_write, - u8 command, int size, - union i2c_smbus_data * data) -{ - int error; - - /* We exclude the multiplexed addresses */ - if (addr == 0x4c || (addr & 0xfc) == 0x50 || (addr & 0xfc) == 0x30 - || addr == 0x18) - return -ENXIO; - - mutex_lock(&amd756_lock); - - error = amd756_smbus.algo->smbus_xfer(adap, addr, flags, read_write, - command, size, data); - - mutex_unlock(&amd756_lock); - - return error; -} - -/* We remember the last used channels combination so as to only switch - channels when it is really needed. This greatly reduces the SMBus - overhead, but also assumes that nobody will be writing to the PCA9556 - in our back. */ -static u8 last_channels; - -static inline s32 amd756_access_channel(struct i2c_adapter * adap, u16 addr, - unsigned short flags, char read_write, - u8 command, int size, - union i2c_smbus_data * data, - u8 channels) -{ - int error; - - /* We exclude the non-multiplexed addresses */ - if (addr != 0x4c && (addr & 0xfc) != 0x50 && (addr & 0xfc) != 0x30) - return -ENXIO; - - mutex_lock(&amd756_lock); - - if (last_channels != channels) { - union i2c_smbus_data mplxdata; - mplxdata.byte = channels; - - error = amd756_smbus.algo->smbus_xfer(adap, 0x18, 0, - I2C_SMBUS_WRITE, 0x01, - I2C_SMBUS_BYTE_DATA, - &mplxdata); - if (error) - goto UNLOCK; - last_channels = channels; - } - error = amd756_smbus.algo->smbus_xfer(adap, addr, flags, read_write, - command, size, data); - -UNLOCK: - mutex_unlock(&amd756_lock); - return error; -} - -static s32 amd756_access_virt1(struct i2c_adapter * adap, u16 addr, - unsigned short flags, char read_write, - u8 command, int size, - union i2c_smbus_data * data) -{ - /* CPU0: channels 1 and 0 enabled */ - return amd756_access_channel(adap, addr, flags, read_write, command, - size, data, 0x03); -} - -static s32 amd756_access_virt2(struct i2c_adapter * adap, u16 addr, - unsigned short flags, char read_write, - u8 command, int size, - union i2c_smbus_data * data) -{ - /* CPU1: channels 2 and 5 enabled */ - return amd756_access_channel(adap, addr, flags, read_write, command, - size, data, 0x24); -} - -static s32 amd756_access_virt3(struct i2c_adapter * adap, u16 addr, - unsigned short flags, char read_write, - u8 command, int size, - union i2c_smbus_data * data) -{ - /* CPU2: channels 3 and 6 enabled */ - return amd756_access_channel(adap, addr, flags, read_write, command, - size, data, 0x48); -} - -static s32 amd756_access_virt4(struct i2c_adapter * adap, u16 addr, - unsigned short flags, char read_write, - u8 command, int size, - union i2c_smbus_data * data) -{ - /* CPU3: channels 4 and 7 enabled */ - return amd756_access_channel(adap, addr, flags, read_write, command, - size, data, 0x90); -} - -static int __init amd756_s4882_init(void) -{ - int i, error; - union i2c_smbus_data ioconfig; - - if (!amd756_smbus.dev.parent) - return -ENODEV; - - /* Configure the PCA9556 multiplexer */ - ioconfig.byte = 0x00; /* All I/O to output mode */ - error = i2c_smbus_xfer(&amd756_smbus, 0x18, 0, I2C_SMBUS_WRITE, 0x03, - I2C_SMBUS_BYTE_DATA, &ioconfig); - if (error) { - dev_err(&amd756_smbus.dev, "PCA9556 configuration failed\n"); - error = -EIO; - goto ERROR0; - } - - /* Unregister physical bus */ - i2c_del_adapter(&amd756_smbus); - - printk(KERN_INFO "Enabling SMBus multiplexing for Tyan S4882\n"); - /* Define the 5 virtual adapters and algorithms structures */ - if (!(s4882_adapter = kcalloc(5, sizeof(struct i2c_adapter), - GFP_KERNEL))) { - error = -ENOMEM; - goto ERROR1; - } - if (!(s4882_algo = kcalloc(5, sizeof(struct i2c_algorithm), - GFP_KERNEL))) { - error = -ENOMEM; - goto ERROR2; - } - - /* Fill in the new structures */ - s4882_algo[0] = *(amd756_smbus.algo); - s4882_algo[0].smbus_xfer = amd756_access_virt0; - s4882_adapter[0] = amd756_smbus; - s4882_adapter[0].algo = s4882_algo; - s4882_adapter[0].dev.parent = amd756_smbus.dev.parent; - for (i = 1; i < 5; i++) { - s4882_algo[i] = *(amd756_smbus.algo); - s4882_adapter[i] = amd756_smbus; - snprintf(s4882_adapter[i].name, sizeof(s4882_adapter[i].name), - "SMBus 8111 adapter (CPU%d)", i-1); - s4882_adapter[i].algo = s4882_algo+i; - s4882_adapter[i].dev.parent = amd756_smbus.dev.parent; - } - s4882_algo[1].smbus_xfer = amd756_access_virt1; - s4882_algo[2].smbus_xfer = amd756_access_virt2; - s4882_algo[3].smbus_xfer = amd756_access_virt3; - s4882_algo[4].smbus_xfer = amd756_access_virt4; - - /* Register virtual adapters */ - for (i = 0; i < 5; i++) { - error = i2c_add_adapter(s4882_adapter+i); - if (error) { - printk(KERN_ERR "i2c-amd756-s4882: " - "Virtual adapter %d registration " - "failed, module not inserted\n", i); - for (i--; i >= 0; i--) - i2c_del_adapter(s4882_adapter+i); - goto ERROR3; - } - } - - return 0; - -ERROR3: - kfree(s4882_algo); - s4882_algo = NULL; -ERROR2: - kfree(s4882_adapter); - s4882_adapter = NULL; -ERROR1: - /* Restore physical bus */ - i2c_add_adapter(&amd756_smbus); -ERROR0: - return error; -} - -static void __exit amd756_s4882_exit(void) -{ - if (s4882_adapter) { - int i; - - for (i = 0; i < 5; i++) - i2c_del_adapter(s4882_adapter+i); - kfree(s4882_adapter); - s4882_adapter = NULL; - } - kfree(s4882_algo); - s4882_algo = NULL; - - /* Restore physical bus */ - if (i2c_add_adapter(&amd756_smbus)) - printk(KERN_ERR "i2c-amd756-s4882: " - "Physical bus restoration failed\n"); -} - -MODULE_AUTHOR("Jean Delvare "); -MODULE_DESCRIPTION("S4882 SMBus multiplexing"); -MODULE_LICENSE("GPL"); - -module_init(amd756_s4882_init); -module_exit(amd756_s4882_exit); --- linux-6.5.orig/drivers/i2c/busses/i2c-amd756.c +++ linux-6.5/drivers/i2c/busses/i2c-amd756.c @@ -283,7 +283,7 @@ static const struct i2c_algorithm smbus_ .functionality = amd756_func, }; -struct i2c_adapter amd756_smbus = { +static struct i2c_adapter amd756_smbus = { .owner = THIS_MODULE, .class = I2C_CLASS_HWMON | I2C_CLASS_SPD, .algo = &smbus_algorithm, @@ -398,5 +398,3 @@ module_pci_driver(amd756_driver); MODULE_AUTHOR("Merlin Hughes "); MODULE_DESCRIPTION("AMD756/766/768/8111 and nVidia nForce SMBus driver"); MODULE_LICENSE("GPL"); - -EXPORT_SYMBOL(amd756_smbus); --- linux-6.5.orig/drivers/i2c/busses/i2c-nforce2-s4985.c +++ /dev/null @@ -1,240 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-or-later -/* - * i2c-nforce2-s4985.c - i2c-nforce2 extras for the Tyan S4985 motherboard - * - * Copyright (C) 2008 Jean Delvare - */ - -/* - * We select the channels by sending commands to the Philips - * PCA9556 chip at I2C address 0x18. The main adapter is used for - * the non-multiplexed part of the bus, and 4 virtual adapters - * are defined for the multiplexed addresses: 0x50-0x53 (memory - * module EEPROM) located on channels 1-4. We define one virtual - * adapter per CPU, which corresponds to one multiplexed channel: - * CPU0: virtual adapter 1, channel 1 - * CPU1: virtual adapter 2, channel 2 - * CPU2: virtual adapter 3, channel 3 - * CPU3: virtual adapter 4, channel 4 - */ - -#include -#include -#include -#include -#include -#include - -extern struct i2c_adapter *nforce2_smbus; - -static struct i2c_adapter *s4985_adapter; -static struct i2c_algorithm *s4985_algo; - -/* Wrapper access functions for multiplexed SMBus */ -static DEFINE_MUTEX(nforce2_lock); - -static s32 nforce2_access_virt0(struct i2c_adapter *adap, u16 addr, - unsigned short flags, char read_write, - u8 command, int size, - union i2c_smbus_data *data) -{ - int error; - - /* We exclude the multiplexed addresses */ - if ((addr & 0xfc) == 0x50 || (addr & 0xfc) == 0x30 - || addr == 0x18) - return -ENXIO; - - mutex_lock(&nforce2_lock); - error = nforce2_smbus->algo->smbus_xfer(adap, addr, flags, read_write, - command, size, data); - mutex_unlock(&nforce2_lock); - - return error; -} - -/* We remember the last used channels combination so as to only switch - channels when it is really needed. This greatly reduces the SMBus - overhead, but also assumes that nobody will be writing to the PCA9556 - in our back. */ -static u8 last_channels; - -static inline s32 nforce2_access_channel(struct i2c_adapter *adap, u16 addr, - unsigned short flags, char read_write, - u8 command, int size, - union i2c_smbus_data *data, - u8 channels) -{ - int error; - - /* We exclude the non-multiplexed addresses */ - if ((addr & 0xfc) != 0x50 && (addr & 0xfc) != 0x30) - return -ENXIO; - - mutex_lock(&nforce2_lock); - if (last_channels != channels) { - union i2c_smbus_data mplxdata; - mplxdata.byte = channels; - - error = nforce2_smbus->algo->smbus_xfer(adap, 0x18, 0, - I2C_SMBUS_WRITE, 0x01, - I2C_SMBUS_BYTE_DATA, - &mplxdata); - if (error) - goto UNLOCK; - last_channels = channels; - } - error = nforce2_smbus->algo->smbus_xfer(adap, addr, flags, read_write, - command, size, data); - -UNLOCK: - mutex_unlock(&nforce2_lock); - return error; -} - -static s32 nforce2_access_virt1(struct i2c_adapter *adap, u16 addr, - unsigned short flags, char read_write, - u8 command, int size, - union i2c_smbus_data *data) -{ - /* CPU0: channel 1 enabled */ - return nforce2_access_channel(adap, addr, flags, read_write, command, - size, data, 0x02); -} - -static s32 nforce2_access_virt2(struct i2c_adapter *adap, u16 addr, - unsigned short flags, char read_write, - u8 command, int size, - union i2c_smbus_data *data) -{ - /* CPU1: channel 2 enabled */ - return nforce2_access_channel(adap, addr, flags, read_write, command, - size, data, 0x04); -} - -static s32 nforce2_access_virt3(struct i2c_adapter *adap, u16 addr, - unsigned short flags, char read_write, - u8 command, int size, - union i2c_smbus_data *data) -{ - /* CPU2: channel 3 enabled */ - return nforce2_access_channel(adap, addr, flags, read_write, command, - size, data, 0x08); -} - -static s32 nforce2_access_virt4(struct i2c_adapter *adap, u16 addr, - unsigned short flags, char read_write, - u8 command, int size, - union i2c_smbus_data *data) -{ - /* CPU3: channel 4 enabled */ - return nforce2_access_channel(adap, addr, flags, read_write, command, - size, data, 0x10); -} - -static int __init nforce2_s4985_init(void) -{ - int i, error; - union i2c_smbus_data ioconfig; - - if (!nforce2_smbus) - return -ENODEV; - - /* Configure the PCA9556 multiplexer */ - ioconfig.byte = 0x00; /* All I/O to output mode */ - error = i2c_smbus_xfer(nforce2_smbus, 0x18, 0, I2C_SMBUS_WRITE, 0x03, - I2C_SMBUS_BYTE_DATA, &ioconfig); - if (error) { - dev_err(&nforce2_smbus->dev, "PCA9556 configuration failed\n"); - error = -EIO; - goto ERROR0; - } - - /* Unregister physical bus */ - i2c_del_adapter(nforce2_smbus); - - printk(KERN_INFO "Enabling SMBus multiplexing for Tyan S4985\n"); - /* Define the 5 virtual adapters and algorithms structures */ - s4985_adapter = kcalloc(5, sizeof(struct i2c_adapter), GFP_KERNEL); - if (!s4985_adapter) { - error = -ENOMEM; - goto ERROR1; - } - s4985_algo = kcalloc(5, sizeof(struct i2c_algorithm), GFP_KERNEL); - if (!s4985_algo) { - error = -ENOMEM; - goto ERROR2; - } - - /* Fill in the new structures */ - s4985_algo[0] = *(nforce2_smbus->algo); - s4985_algo[0].smbus_xfer = nforce2_access_virt0; - s4985_adapter[0] = *nforce2_smbus; - s4985_adapter[0].algo = s4985_algo; - s4985_adapter[0].dev.parent = nforce2_smbus->dev.parent; - for (i = 1; i < 5; i++) { - s4985_algo[i] = *(nforce2_smbus->algo); - s4985_adapter[i] = *nforce2_smbus; - snprintf(s4985_adapter[i].name, sizeof(s4985_adapter[i].name), - "SMBus nForce2 adapter (CPU%d)", i - 1); - s4985_adapter[i].algo = s4985_algo + i; - s4985_adapter[i].dev.parent = nforce2_smbus->dev.parent; - } - s4985_algo[1].smbus_xfer = nforce2_access_virt1; - s4985_algo[2].smbus_xfer = nforce2_access_virt2; - s4985_algo[3].smbus_xfer = nforce2_access_virt3; - s4985_algo[4].smbus_xfer = nforce2_access_virt4; - - /* Register virtual adapters */ - for (i = 0; i < 5; i++) { - error = i2c_add_adapter(s4985_adapter + i); - if (error) { - printk(KERN_ERR "i2c-nforce2-s4985: " - "Virtual adapter %d registration " - "failed, module not inserted\n", i); - for (i--; i >= 0; i--) - i2c_del_adapter(s4985_adapter + i); - goto ERROR3; - } - } - - return 0; - -ERROR3: - kfree(s4985_algo); - s4985_algo = NULL; -ERROR2: - kfree(s4985_adapter); - s4985_adapter = NULL; -ERROR1: - /* Restore physical bus */ - i2c_add_adapter(nforce2_smbus); -ERROR0: - return error; -} - -static void __exit nforce2_s4985_exit(void) -{ - if (s4985_adapter) { - int i; - - for (i = 0; i < 5; i++) - i2c_del_adapter(s4985_adapter+i); - kfree(s4985_adapter); - s4985_adapter = NULL; - } - kfree(s4985_algo); - s4985_algo = NULL; - - /* Restore physical bus */ - if (i2c_add_adapter(nforce2_smbus)) - printk(KERN_ERR "i2c-nforce2-s4985: " - "Physical bus restoration failed\n"); -} - -MODULE_AUTHOR("Jean Delvare "); -MODULE_DESCRIPTION("S4985 SMBus multiplexing"); -MODULE_LICENSE("GPL"); - -module_init(nforce2_s4985_init); -module_exit(nforce2_s4985_exit); --- linux-6.5.orig/drivers/i2c/busses/i2c-nforce2.c +++ linux-6.5/drivers/i2c/busses/i2c-nforce2.c @@ -117,20 +117,6 @@ static const struct dmi_system_id nforce static struct pci_driver nforce2_driver; -/* For multiplexing support, we need a global reference to the 1st - SMBus channel */ -#if IS_ENABLED(CONFIG_I2C_NFORCE2_S4985) -struct i2c_adapter *nforce2_smbus; -EXPORT_SYMBOL_GPL(nforce2_smbus); - -static void nforce2_set_reference(struct i2c_adapter *adap) -{ - nforce2_smbus = adap; -} -#else -static inline void nforce2_set_reference(struct i2c_adapter *adap) { } -#endif - static void nforce2_abort(struct i2c_adapter *adap) { struct nforce2_smbus *smbus = adap->algo_data; @@ -411,7 +397,6 @@ static int nforce2_probe(struct pci_dev return -ENODEV; } - nforce2_set_reference(&smbuses[0].adapter); return 0; } @@ -420,7 +405,6 @@ static void nforce2_remove(struct pci_de { struct nforce2_smbus *smbuses = pci_get_drvdata(dev); - nforce2_set_reference(NULL); if (smbuses[0].base) { i2c_del_adapter(&smbuses[0].adapter); release_region(smbuses[0].base, smbuses[0].size);