^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * i2c-nforce2-s4985.c - i2c-nforce2 extras for the Tyan S4985 motherboard
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) 2008 Jean Delvare <jdelvare@suse.de>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * We select the channels by sending commands to the Philips
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) * PCA9556 chip at I2C address 0x18. The main adapter is used for
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) * the non-multiplexed part of the bus, and 4 virtual adapters
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) * are defined for the multiplexed addresses: 0x50-0x53 (memory
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) * module EEPROM) located on channels 1-4. We define one virtual
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) * adapter per CPU, which corresponds to one multiplexed channel:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) * CPU0: virtual adapter 1, channel 1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) * CPU1: virtual adapter 2, channel 2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) * CPU2: virtual adapter 3, channel 3
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) * CPU3: virtual adapter 4, channel 4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include <linux/i2c.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #include <linux/mutex.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) extern struct i2c_adapter *nforce2_smbus;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) static struct i2c_adapter *s4985_adapter;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) static struct i2c_algorithm *s4985_algo;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) /* Wrapper access functions for multiplexed SMBus */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) static DEFINE_MUTEX(nforce2_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) static s32 nforce2_access_virt0(struct i2c_adapter *adap, u16 addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) unsigned short flags, char read_write,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) u8 command, int size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) union i2c_smbus_data *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) /* We exclude the multiplexed addresses */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) if ((addr & 0xfc) == 0x50 || (addr & 0xfc) == 0x30
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) || addr == 0x18)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) return -ENXIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) mutex_lock(&nforce2_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) error = nforce2_smbus->algo->smbus_xfer(adap, addr, flags, read_write,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) command, size, data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) mutex_unlock(&nforce2_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) /* We remember the last used channels combination so as to only switch
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) channels when it is really needed. This greatly reduces the SMBus
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) overhead, but also assumes that nobody will be writing to the PCA9556
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) in our back. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) static u8 last_channels;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) static inline s32 nforce2_access_channel(struct i2c_adapter *adap, u16 addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) unsigned short flags, char read_write,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) u8 command, int size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) union i2c_smbus_data *data,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) u8 channels)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) /* We exclude the non-multiplexed addresses */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) if ((addr & 0xfc) != 0x50 && (addr & 0xfc) != 0x30)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) return -ENXIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) mutex_lock(&nforce2_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) if (last_channels != channels) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) union i2c_smbus_data mplxdata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) mplxdata.byte = channels;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) error = nforce2_smbus->algo->smbus_xfer(adap, 0x18, 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) I2C_SMBUS_WRITE, 0x01,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) I2C_SMBUS_BYTE_DATA,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) &mplxdata);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) goto UNLOCK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) last_channels = channels;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) error = nforce2_smbus->algo->smbus_xfer(adap, addr, flags, read_write,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) command, size, data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) UNLOCK:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) mutex_unlock(&nforce2_lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) static s32 nforce2_access_virt1(struct i2c_adapter *adap, u16 addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) unsigned short flags, char read_write,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) u8 command, int size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) union i2c_smbus_data *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) /* CPU0: channel 1 enabled */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) return nforce2_access_channel(adap, addr, flags, read_write, command,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) size, data, 0x02);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) static s32 nforce2_access_virt2(struct i2c_adapter *adap, u16 addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) unsigned short flags, char read_write,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) u8 command, int size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) union i2c_smbus_data *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) /* CPU1: channel 2 enabled */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) return nforce2_access_channel(adap, addr, flags, read_write, command,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) size, data, 0x04);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) static s32 nforce2_access_virt3(struct i2c_adapter *adap, u16 addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) unsigned short flags, char read_write,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) u8 command, int size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) union i2c_smbus_data *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) /* CPU2: channel 3 enabled */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) return nforce2_access_channel(adap, addr, flags, read_write, command,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) size, data, 0x08);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) static s32 nforce2_access_virt4(struct i2c_adapter *adap, u16 addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) unsigned short flags, char read_write,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) u8 command, int size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) union i2c_smbus_data *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) /* CPU3: channel 4 enabled */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) return nforce2_access_channel(adap, addr, flags, read_write, command,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) size, data, 0x10);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) static int __init nforce2_s4985_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) int i, error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) union i2c_smbus_data ioconfig;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) if (!nforce2_smbus)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) /* Configure the PCA9556 multiplexer */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) ioconfig.byte = 0x00; /* All I/O to output mode */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) error = i2c_smbus_xfer(nforce2_smbus, 0x18, 0, I2C_SMBUS_WRITE, 0x03,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) I2C_SMBUS_BYTE_DATA, &ioconfig);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) if (error) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) dev_err(&nforce2_smbus->dev, "PCA9556 configuration failed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) error = -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) goto ERROR0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) /* Unregister physical bus */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) i2c_del_adapter(nforce2_smbus);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) printk(KERN_INFO "Enabling SMBus multiplexing for Tyan S4985\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) /* Define the 5 virtual adapters and algorithms structures */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) s4985_adapter = kcalloc(5, sizeof(struct i2c_adapter), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) if (!s4985_adapter) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) error = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) goto ERROR1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) s4985_algo = kcalloc(5, sizeof(struct i2c_algorithm), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) if (!s4985_algo) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) error = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) goto ERROR2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) /* Fill in the new structures */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) s4985_algo[0] = *(nforce2_smbus->algo);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) s4985_algo[0].smbus_xfer = nforce2_access_virt0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) s4985_adapter[0] = *nforce2_smbus;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) s4985_adapter[0].algo = s4985_algo;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) s4985_adapter[0].dev.parent = nforce2_smbus->dev.parent;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) for (i = 1; i < 5; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) s4985_algo[i] = *(nforce2_smbus->algo);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) s4985_adapter[i] = *nforce2_smbus;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) snprintf(s4985_adapter[i].name, sizeof(s4985_adapter[i].name),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) "SMBus nForce2 adapter (CPU%d)", i - 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) s4985_adapter[i].algo = s4985_algo + i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) s4985_adapter[i].dev.parent = nforce2_smbus->dev.parent;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) s4985_algo[1].smbus_xfer = nforce2_access_virt1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) s4985_algo[2].smbus_xfer = nforce2_access_virt2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) s4985_algo[3].smbus_xfer = nforce2_access_virt3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) s4985_algo[4].smbus_xfer = nforce2_access_virt4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) /* Register virtual adapters */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) for (i = 0; i < 5; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) error = i2c_add_adapter(s4985_adapter + i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) if (error) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) printk(KERN_ERR "i2c-nforce2-s4985: "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) "Virtual adapter %d registration "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) "failed, module not inserted\n", i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) for (i--; i >= 0; i--)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) i2c_del_adapter(s4985_adapter + i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) goto ERROR3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) ERROR3:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) kfree(s4985_algo);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) s4985_algo = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) ERROR2:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) kfree(s4985_adapter);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) s4985_adapter = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) ERROR1:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) /* Restore physical bus */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) i2c_add_adapter(nforce2_smbus);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) ERROR0:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) static void __exit nforce2_s4985_exit(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) if (s4985_adapter) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) for (i = 0; i < 5; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) i2c_del_adapter(s4985_adapter+i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) kfree(s4985_adapter);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) s4985_adapter = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) kfree(s4985_algo);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) s4985_algo = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) /* Restore physical bus */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) if (i2c_add_adapter(nforce2_smbus))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) printk(KERN_ERR "i2c-nforce2-s4985: "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) "Physical bus restoration failed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) MODULE_AUTHOR("Jean Delvare <jdelvare@suse.de>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) MODULE_DESCRIPTION("S4985 SMBus multiplexing");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) module_init(nforce2_s4985_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) module_exit(nforce2_s4985_exit);
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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