* 'i2c-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging:
therm_windtunnel: Convert to a new-style i2c driver
therm_adt746x: Convert to a new-style i2c driver
windfarm: Convert to new-style i2c drivers
therm_pm72: Convert to a new-style i2c driver
i2c-viapro: Add new PCI device ID for VX855
i2c/chips: Move max6875 to drivers/misc/eeprom
i2c: Do not give adapters a default parent
i2c: Do not probe for TV chips on Voodoo3 adapters
i2c: Retry automatically on arbitration loss
i2c: Remove void casts
* VIA Technologies, Inc. VX800/VX820
Datasheet: available on http://linux.via.com.tw
+ * VIA Technologies, Inc. VX855/VX875
+ Datasheet: Availability unknown
+
Authors:
Kyösti Mälkki <kmalkki@cc.hut.fi>,
Mark D. Studebaker <mdsxyz123@yahoo.com>,
device 1106:3287 (VT8251)
device 1106:8324 (CX700)
device 1106:8353 (VX800/VX820)
+ device 1106:8409 (VX855/VX875)
If none of these show up, you should look in the BIOS for settings like
enable ACPI / SMBus or even USB.
CONFIG_SENSORS_PCF8574=y
# CONFIG_PCF8575 is not set
CONFIG_SENSORS_PCF8591=y
-CONFIG_SENSORS_MAX6875=y
+CONFIG_EEPROM_MAX6875=y
# CONFIG_SENSORS_TSL2550 is not set
CONFIG_I2C_DEBUG_CORE=y
CONFIG_I2C_DEBUG_ALGO=y
CONFIG_SENSORS_PCF8574=m
CONFIG_SENSORS_PCA9539=m
CONFIG_SENSORS_PCF8591=m
-CONFIG_SENSORS_MAX6875=m
+CONFIG_EEPROM_MAX6875=m
# CONFIG_SENSORS_TSL2550 is not set
# CONFIG_I2C_DEBUG_CORE is not set
# CONFIG_I2C_DEBUG_ALGO is not set
CONFIG_SENSORS_PCA9539=m
CONFIG_SENSORS_PCF8591=m
# CONFIG_TPS65010 is not set
-CONFIG_SENSORS_MAX6875=m
+CONFIG_EEPROM_MAX6875=m
CONFIG_SENSORS_TSL2550=m
CONFIG_MCU_MPC8349EMITX=m
# CONFIG_I2C_DEBUG_CORE is not set
will be called i2c-via.
config I2C_VIAPRO
- tristate "VIA VT82C596/82C686/82xx and CX700/VX800/VX820"
+ tristate "VIA VT82C596/82C686/82xx and CX700/VX8xx"
depends on PCI
help
If you say yes to this option, support will be included for the VIA
VT8237R/A/S
VT8251
CX700
- VX800
- VX820
+ VX800/VX820
+ VX855/VX875
This driver can also be built as a module. If so, the module
will be called i2c-viapro.
VT8251 0x3287 yes
CX700 0x8324 yes
VX800/VX820 0x8353 yes
+ VX855/VX875 0x8409 yes
Note: we assume there can only be one device, with one SMBus interface.
*/
switch (pdev->device) {
case PCI_DEVICE_ID_VIA_CX700:
case PCI_DEVICE_ID_VIA_VX800:
+ case PCI_DEVICE_ID_VIA_VX855:
case PCI_DEVICE_ID_VIA_8251:
case PCI_DEVICE_ID_VIA_8237:
case PCI_DEVICE_ID_VIA_8237A:
.driver_data = SMBBA3 },
{ PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_VX800),
.driver_data = SMBBA3 },
+ { PCI_DEVICE(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_VX855),
+ .driver_data = SMBBA3 },
{ 0, }
};
static struct i2c_adapter voodoo3_i2c_adapter = {
.owner = THIS_MODULE,
- .class = I2C_CLASS_TV_ANALOG,
.name = "I2C Voodoo3/Banshee adapter",
.algo_data = &voo_i2c_bit_data,
};
This driver is deprecated and will be dropped soon. Use
drivers/gpio/pca953x.c instead.
-config SENSORS_MAX6875
- tristate "Maxim MAX6875 Power supply supervisor"
- depends on EXPERIMENTAL
- help
- If you say yes here you get support for the Maxim MAX6875
- EEPROM-programmable, quad power-supply sequencer/supervisor.
-
- This provides an interface to program the EEPROM and reset the chip.
-
- This driver also supports the Maxim MAX6874 hex power-supply
- sequencer/supervisor if found at a compatible address.
-
- This driver can also be built as a module. If so, the module
- will be called max6875.
-
config SENSORS_TSL2550
tristate "Taos TSL2550 ambient light sensor"
depends on EXPERIMENTAL
#
obj-$(CONFIG_DS1682) += ds1682.o
-obj-$(CONFIG_SENSORS_MAX6875) += max6875.o
obj-$(CONFIG_SENSORS_PCA9539) += pca9539.o
obj-$(CONFIG_SENSORS_PCF8574) += pcf8574.o
obj-$(CONFIG_PCF8575) += pcf8575.o
+++ /dev/null
-/*
- max6875.c - driver for MAX6874/MAX6875
-
- Copyright (C) 2005 Ben Gardner <bgardner@wabtec.com>
-
- Based on i2c/chips/eeprom.c
-
- The MAX6875 has a bank of registers and two banks of EEPROM.
- Address ranges are defined as follows:
- * 0x0000 - 0x0046 = configuration registers
- * 0x8000 - 0x8046 = configuration EEPROM
- * 0x8100 - 0x82FF = user EEPROM
-
- This driver makes the user EEPROM available for read.
-
- The registers & config EEPROM should be accessed via i2c-dev.
-
- The MAX6875 ignores the lowest address bit, so each chip responds to
- two addresses - 0x50/0x51 and 0x52/0x53.
-
- Note that the MAX6875 uses i2c_smbus_write_byte_data() to set the read
- address, so this driver is destructive if loaded for the wrong EEPROM chip.
-
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; version 2 of the License.
-*/
-
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/module.h>
-#include <linux/slab.h>
-#include <linux/i2c.h>
-#include <linux/mutex.h>
-
-/* Do not scan - the MAX6875 access method will write to some EEPROM chips */
-static const unsigned short normal_i2c[] = { I2C_CLIENT_END };
-
-/* Insmod parameters */
-I2C_CLIENT_INSMOD_1(max6875);
-
-/* The MAX6875 can only read/write 16 bytes at a time */
-#define SLICE_SIZE 16
-#define SLICE_BITS 4
-
-/* USER EEPROM is at addresses 0x8100 - 0x82FF */
-#define USER_EEPROM_BASE 0x8100
-#define USER_EEPROM_SIZE 0x0200
-#define USER_EEPROM_SLICES 32
-
-/* MAX6875 commands */
-#define MAX6875_CMD_BLK_READ 0x84
-
-/* Each client has this additional data */
-struct max6875_data {
- struct i2c_client *fake_client;
- struct mutex update_lock;
-
- u32 valid;
- u8 data[USER_EEPROM_SIZE];
- unsigned long last_updated[USER_EEPROM_SLICES];
-};
-
-static void max6875_update_slice(struct i2c_client *client, int slice)
-{
- struct max6875_data *data = i2c_get_clientdata(client);
- int i, j, addr;
- u8 *buf;
-
- if (slice >= USER_EEPROM_SLICES)
- return;
-
- mutex_lock(&data->update_lock);
-
- buf = &data->data[slice << SLICE_BITS];
-
- if (!(data->valid & (1 << slice)) ||
- time_after(jiffies, data->last_updated[slice])) {
-
- dev_dbg(&client->dev, "Starting update of slice %u\n", slice);
-
- data->valid &= ~(1 << slice);
-
- addr = USER_EEPROM_BASE + (slice << SLICE_BITS);
-
- /* select the eeprom address */
- if (i2c_smbus_write_byte_data(client, addr >> 8, addr & 0xFF)) {
- dev_err(&client->dev, "address set failed\n");
- goto exit_up;
- }
-
- if (i2c_check_functionality(client->adapter,
- I2C_FUNC_SMBUS_READ_I2C_BLOCK)) {
- if (i2c_smbus_read_i2c_block_data(client,
- MAX6875_CMD_BLK_READ,
- SLICE_SIZE,
- buf) != SLICE_SIZE) {
- goto exit_up;
- }
- } else {
- for (i = 0; i < SLICE_SIZE; i++) {
- j = i2c_smbus_read_byte(client);
- if (j < 0) {
- goto exit_up;
- }
- buf[i] = j;
- }
- }
- data->last_updated[slice] = jiffies;
- data->valid |= (1 << slice);
- }
-exit_up:
- mutex_unlock(&data->update_lock);
-}
-
-static ssize_t max6875_read(struct kobject *kobj,
- struct bin_attribute *bin_attr,
- char *buf, loff_t off, size_t count)
-{
- struct i2c_client *client = kobj_to_i2c_client(kobj);
- struct max6875_data *data = i2c_get_clientdata(client);
- int slice, max_slice;
-
- if (off > USER_EEPROM_SIZE)
- return 0;
-
- if (off + count > USER_EEPROM_SIZE)
- count = USER_EEPROM_SIZE - off;
-
- /* refresh slices which contain requested bytes */
- max_slice = (off + count - 1) >> SLICE_BITS;
- for (slice = (off >> SLICE_BITS); slice <= max_slice; slice++)
- max6875_update_slice(client, slice);
-
- memcpy(buf, &data->data[off], count);
-
- return count;
-}
-
-static struct bin_attribute user_eeprom_attr = {
- .attr = {
- .name = "eeprom",
- .mode = S_IRUGO,
- },
- .size = USER_EEPROM_SIZE,
- .read = max6875_read,
-};
-
-/* Return 0 if detection is successful, -ENODEV otherwise */
-static int max6875_detect(struct i2c_client *client, int kind,
- struct i2c_board_info *info)
-{
- struct i2c_adapter *adapter = client->adapter;
-
- if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WRITE_BYTE_DATA
- | I2C_FUNC_SMBUS_READ_BYTE))
- return -ENODEV;
-
- /* Only check even addresses */
- if (client->addr & 1)
- return -ENODEV;
-
- strlcpy(info->type, "max6875", I2C_NAME_SIZE);
-
- return 0;
-}
-
-static int max6875_probe(struct i2c_client *client,
- const struct i2c_device_id *id)
-{
- struct max6875_data *data;
- int err;
-
- if (!(data = kzalloc(sizeof(struct max6875_data), GFP_KERNEL)))
- return -ENOMEM;
-
- /* A fake client is created on the odd address */
- data->fake_client = i2c_new_dummy(client->adapter, client->addr + 1);
- if (!data->fake_client) {
- err = -ENOMEM;
- goto exit_kfree;
- }
-
- /* Init real i2c_client */
- i2c_set_clientdata(client, data);
- mutex_init(&data->update_lock);
-
- err = sysfs_create_bin_file(&client->dev.kobj, &user_eeprom_attr);
- if (err)
- goto exit_remove_fake;
-
- return 0;
-
-exit_remove_fake:
- i2c_unregister_device(data->fake_client);
-exit_kfree:
- kfree(data);
- return err;
-}
-
-static int max6875_remove(struct i2c_client *client)
-{
- struct max6875_data *data = i2c_get_clientdata(client);
-
- i2c_unregister_device(data->fake_client);
-
- sysfs_remove_bin_file(&client->dev.kobj, &user_eeprom_attr);
- kfree(data);
-
- return 0;
-}
-
-static const struct i2c_device_id max6875_id[] = {
- { "max6875", 0 },
- { }
-};
-
-static struct i2c_driver max6875_driver = {
- .driver = {
- .name = "max6875",
- },
- .probe = max6875_probe,
- .remove = max6875_remove,
- .id_table = max6875_id,
-
- .detect = max6875_detect,
- .address_data = &addr_data,
-};
-
-static int __init max6875_init(void)
-{
- return i2c_add_driver(&max6875_driver);
-}
-
-static void __exit max6875_exit(void)
-{
- i2c_del_driver(&max6875_driver);
-}
-
-
-MODULE_AUTHOR("Ben Gardner <bgardner@wabtec.com>");
-MODULE_DESCRIPTION("MAX6875 driver");
-MODULE_LICENSE("GPL");
-
-module_init(max6875_init);
-module_exit(max6875_exit);
#include <linux/i2c.h>
#include <linux/init.h>
#include <linux/idr.h>
-#include <linux/platform_device.h>
#include <linux/mutex.h>
#include <linux/completion.h>
#include <linux/hardirq.h>
mutex_lock(&core_lock);
- /* Add the adapter to the driver core.
- * If the parent pointer is not set up,
- * we add this adapter to the host bus.
- */
- if (adap->dev.parent == NULL) {
- adap->dev.parent = &platform_bus;
- pr_debug("I2C adapter driver [%s] forgot to specify "
- "physical device\n", adap->name);
- }
-
/* Set default timeout to 1 second if not already set */
if (adap->timeout == 0)
adap->timeout = HZ;
*/
int i2c_transfer(struct i2c_adapter *adap, struct i2c_msg *msgs, int num)
{
- int ret;
+ unsigned long orig_jiffies;
+ int ret, try;
/* REVISIT the fault reporting model here is weak:
*
mutex_lock_nested(&adap->bus_lock, adap->level);
}
- ret = adap->algo->master_xfer(adap,msgs,num);
+ /* Retry automatically on arbitration loss */
+ orig_jiffies = jiffies;
+ for (ret = 0, try = 0; try <= adap->retries; try++) {
+ ret = adap->algo->master_xfer(adap, msgs, num);
+ if (ret != -EAGAIN)
+ break;
+ if (time_after(jiffies, orig_jiffies + adap->timeout))
+ break;
+ }
mutex_unlock(&adap->bus_lock);
return ret;
struct i2c_adapter *adapter;
mutex_lock(&core_lock);
- adapter = (struct i2c_adapter *)idr_find(&i2c_adapter_idr, id);
+ adapter = idr_find(&i2c_adapter_idr, id);
if (adapter && !try_module_get(adapter->owner))
adapter = NULL;
char read_write, u8 command, int protocol,
union i2c_smbus_data *data)
{
+ unsigned long orig_jiffies;
+ int try;
s32 res;
flags &= I2C_M_TEN | I2C_CLIENT_PEC;
if (adapter->algo->smbus_xfer) {
mutex_lock(&adapter->bus_lock);
- res = adapter->algo->smbus_xfer(adapter,addr,flags,read_write,
- command, protocol, data);
+
+ /* Retry automatically on arbitration loss */
+ orig_jiffies = jiffies;
+ for (res = 0, try = 0; try <= adapter->retries; try++) {
+ res = adapter->algo->smbus_xfer(adapter, addr, flags,
+ read_write, command,
+ protocol, data);
+ if (res != -EAGAIN)
+ break;
+ if (time_after(jiffies,
+ orig_jiffies + adapter->timeout))
+ break;
+ }
mutex_unlock(&adapter->bus_lock);
} else
res = i2c_smbus_xfer_emulated(adapter,addr,flags,read_write,
"(default 0)");
struct thermostat {
- struct i2c_client clt;
+ struct i2c_client *clt;
u8 temps[3];
u8 cached_temp[3];
u8 initial_limits[3];
static struct thermostat* thermostat;
static struct task_struct *thread_therm = NULL;
-static int attach_one_thermostat(struct i2c_adapter *adapter, int addr,
- int busno);
-
static void write_both_fan_speed(struct thermostat *th, int speed);
static void write_fan_speed(struct thermostat *th, int speed, int fan);
tmp[0] = reg;
tmp[1] = data;
- rc = i2c_master_send(&th->clt, (const char *)tmp, 2);
+ rc = i2c_master_send(th->clt, (const char *)tmp, 2);
if (rc < 0)
return rc;
if (rc != 2)
int rc;
reg_addr = (u8)reg;
- rc = i2c_master_send(&th->clt, ®_addr, 1);
+ rc = i2c_master_send(th->clt, ®_addr, 1);
if (rc < 0)
return rc;
if (rc != 1)
return -ENODEV;
- rc = i2c_master_recv(&th->clt, (char *)&data, 1);
+ rc = i2c_master_recv(th->clt, (char *)&data, 1);
if (rc < 0)
return rc;
return data;
attach_thermostat(struct i2c_adapter *adapter)
{
unsigned long bus_no;
+ struct i2c_board_info info;
+ struct i2c_client *client;
if (strncmp(adapter->name, "uni-n", 5))
return -ENODEV;
bus_no = simple_strtoul(adapter->name + 6, NULL, 10);
if (bus_no != therm_bus)
return -ENODEV;
- return attach_one_thermostat(adapter, therm_address, bus_no);
+
+ memset(&info, 0, sizeof(struct i2c_board_info));
+ strlcpy(info.type, "therm_adt746x", I2C_NAME_SIZE);
+ info.addr = therm_address;
+ client = i2c_new_device(adapter, &info);
+ if (!client)
+ return -ENODEV;
+
+ /*
+ * Let i2c-core delete that device on driver removal.
+ * This is safe because i2c-core holds the core_lock mutex for us.
+ */
+ list_add_tail(&client->detected, &client->driver->clients);
+ return 0;
}
static int
-detach_thermostat(struct i2c_adapter *adapter)
+remove_thermostat(struct i2c_client *client)
{
- struct thermostat* th;
+ struct thermostat *th = i2c_get_clientdata(client);
int i;
- if (thermostat == NULL)
- return 0;
-
- th = thermostat;
-
if (thread_therm != NULL) {
kthread_stop(thread_therm);
}
write_both_fan_speed(th, -1);
- i2c_detach_client(&th->clt);
-
thermostat = NULL;
kfree(th);
return 0;
}
-static struct i2c_driver thermostat_driver = {
- .driver = {
- .name = "therm_adt746x",
- },
- .attach_adapter = attach_thermostat,
- .detach_adapter = detach_thermostat,
-};
-
static int read_fan_speed(struct thermostat *th, u8 addr)
{
u8 tmp[2];
th->limits[i] = default_limits_local[i] + limit_adjust;
}
-static int attach_one_thermostat(struct i2c_adapter *adapter, int addr,
- int busno)
+static int probe_thermostat(struct i2c_client *client,
+ const struct i2c_device_id *id)
{
struct thermostat* th;
int rc;
if (!th)
return -ENOMEM;
- th->clt.addr = addr;
- th->clt.adapter = adapter;
- th->clt.driver = &thermostat_driver;
- strcpy(th->clt.name, "thermostat");
+ i2c_set_clientdata(client, th);
+ th->clt = client;
rc = read_reg(th, 0);
if (rc < 0) {
- printk(KERN_ERR "adt746x: Thermostat failed to read config "
- "from bus %d !\n",
- busno);
+ dev_err(&client->dev, "Thermostat failed to read config!\n");
kfree(th);
return -ENODEV;
}
thermostat = th;
- if (i2c_attach_client(&th->clt)) {
- printk(KERN_INFO "adt746x: Thermostat failed to attach "
- "client !\n");
- thermostat = NULL;
- kfree(th);
- return -ENODEV;
- }
-
/* be sure to really write fan speed the first time */
th->last_speed[0] = -2;
th->last_speed[1] = -2;
return 0;
}
+static const struct i2c_device_id therm_adt746x_id[] = {
+ { "therm_adt746x", 0 },
+ { }
+};
+
+static struct i2c_driver thermostat_driver = {
+ .driver = {
+ .name = "therm_adt746x",
+ },
+ .attach_adapter = attach_thermostat,
+ .probe = probe_thermostat,
+ .remove = remove_thermostat,
+ .id_table = therm_adt746x_id,
+};
+
/*
* Now, unfortunately, sysfs doesn't give us a nice void * we could
* pass around to the attribute functions, so we don't really have
},
};
-/*
- * i2c_driver structure to attach to the host i2c controller
- */
-
-static int therm_pm72_attach(struct i2c_adapter *adapter);
-static int therm_pm72_detach(struct i2c_adapter *adapter);
-
-static struct i2c_driver therm_pm72_driver =
-{
- .driver = {
- .name = "therm_pm72",
- },
- .attach_adapter = therm_pm72_attach,
- .detach_adapter = therm_pm72_detach,
-};
-
/*
* Utility function to create an i2c_client structure and
* attach it to one of u3 adapters
{
struct i2c_client *clt;
struct i2c_adapter *adap;
+ struct i2c_board_info info;
if (id & 0x200)
adap = k2;
if (adap == NULL)
return NULL;
- clt = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
- if (clt == NULL)
- return NULL;
-
- clt->addr = (id >> 1) & 0x7f;
- clt->adapter = adap;
- clt->driver = &therm_pm72_driver;
- strncpy(clt->name, name, I2C_NAME_SIZE-1);
-
- if (i2c_attach_client(clt)) {
+ memset(&info, 0, sizeof(struct i2c_board_info));
+ info.addr = (id >> 1) & 0x7f;
+ strlcpy(info.type, "therm_pm72", I2C_NAME_SIZE);
+ clt = i2c_new_device(adap, &info);
+ if (!clt) {
printk(KERN_ERR "therm_pm72: Failed to attach to i2c ID 0x%x\n", id);
- kfree(clt);
return NULL;
}
- return clt;
-}
-/*
- * Utility function to get rid of the i2c_client structure
- * (will also detach from the adapter hopepfully)
- */
-static void detach_i2c_chip(struct i2c_client *clt)
-{
- i2c_detach_client(clt);
- kfree(clt);
+ /*
+ * Let i2c-core delete that device on driver removal.
+ * This is safe because i2c-core holds the core_lock mutex for us.
+ */
+ list_add_tail(&clt->detected, &clt->driver->clients);
+ return clt;
}
/*
return 0;
fail:
- if (state->monitor)
- detach_i2c_chip(state->monitor);
state->monitor = NULL;
return -ENODEV;
device_remove_file(&of_dev->dev, &dev_attr_cpu1_intake_fan_rpm);
}
- detach_i2c_chip(state->monitor);
state->monitor = NULL;
}
device_remove_file(&of_dev->dev, &dev_attr_backside_temperature);
device_remove_file(&of_dev->dev, &dev_attr_backside_fan_pwm);
- detach_i2c_chip(state->monitor);
state->monitor = NULL;
}
device_remove_file(&of_dev->dev, &dev_attr_drives_temperature);
device_remove_file(&of_dev->dev, &dev_attr_drives_fan_rpm);
- detach_i2c_chip(state->monitor);
state->monitor = NULL;
}
device_remove_file(&of_dev->dev, &dev_attr_dimms_temperature);
- detach_i2c_chip(state->monitor);
state->monitor = NULL;
}
device_remove_file(&of_dev->dev, &dev_attr_slots_temperature);
device_remove_file(&of_dev->dev, &dev_attr_slots_fan_pwm);
- detach_i2c_chip(state->monitor);
state->monitor = NULL;
}
*/
static void detach_fcu(void)
{
- if (fcu)
- detach_i2c_chip(fcu);
fcu = NULL;
}
return 0;
}
+static int therm_pm72_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ /* Always succeed, the real work was done in therm_pm72_attach() */
+ return 0;
+}
+
/*
- * Called on every adapter when the driver or the i2c controller
+ * Called when any of the devices which participates into thermal management
* is going away.
*/
-static int therm_pm72_detach(struct i2c_adapter *adapter)
+static int therm_pm72_remove(struct i2c_client *client)
{
+ struct i2c_adapter *adapter = client->adapter;
+
mutex_lock(&driver_lock);
if (state != state_detached)
return 0;
}
+/*
+ * i2c_driver structure to attach to the host i2c controller
+ */
+
+static const struct i2c_device_id therm_pm72_id[] = {
+ /*
+ * Fake device name, thermal management is done by several
+ * chips but we don't need to differentiate between them at
+ * this point.
+ */
+ { "therm_pm72", 0 },
+ { }
+};
+
+static struct i2c_driver therm_pm72_driver = {
+ .driver = {
+ .name = "therm_pm72",
+ },
+ .attach_adapter = therm_pm72_attach,
+ .probe = therm_pm72_probe,
+ .remove = therm_pm72_remove,
+ .id_table = therm_pm72_id,
+};
+
static int fan_check_loc_match(const char *loc, int fan)
{
char tmp[64];
#define LOG_TEMP 0 /* continously log temperature */
-static int do_probe( struct i2c_adapter *adapter, int addr, int kind);
-
-/* scan 0x48-0x4f (DS1775) and 0x2c-2x2f (ADM1030) */
-static const unsigned short normal_i2c[] = { 0x48, 0x49, 0x4a, 0x4b,
- 0x4c, 0x4d, 0x4e, 0x4f,
- 0x2c, 0x2d, 0x2e, 0x2f,
- I2C_CLIENT_END };
-
-I2C_CLIENT_INSMOD;
-
static struct {
volatile int running;
struct task_struct *poll_task;
static int
do_attach( struct i2c_adapter *adapter )
{
- int ret = 0;
+ /* scan 0x48-0x4f (DS1775) and 0x2c-2x2f (ADM1030) */
+ static const unsigned short scan_ds1775[] = {
+ 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f,
+ I2C_CLIENT_END
+ };
+ static const unsigned short scan_adm1030[] = {
+ 0x2c, 0x2d, 0x2e, 0x2f,
+ I2C_CLIENT_END
+ };
if( strncmp(adapter->name, "uni-n", 5) )
return 0;
if( !x.running ) {
- ret = i2c_probe( adapter, &addr_data, &do_probe );
+ struct i2c_board_info info;
+
+ memset(&info, 0, sizeof(struct i2c_board_info));
+ strlcpy(info.type, "therm_ds1775", I2C_NAME_SIZE);
+ i2c_new_probed_device(adapter, &info, scan_ds1775);
+
+ strlcpy(info.type, "therm_adm1030", I2C_NAME_SIZE);
+ i2c_new_probed_device(adapter, &info, scan_adm1030);
+
if( x.thermostat && x.fan ) {
x.running = 1;
x.poll_task = kthread_run(control_loop, NULL, "g4fand");
}
}
- return ret;
+ return 0;
}
static int
-do_detach( struct i2c_client *client )
+do_remove(struct i2c_client *client)
{
- int err;
-
- if( (err=i2c_detach_client(client)) )
- printk(KERN_ERR "failed to detach thermostat client\n");
- else {
- if( x.running ) {
- x.running = 0;
- kthread_stop(x.poll_task);
- x.poll_task = NULL;
- }
- if( client == x.thermostat )
- x.thermostat = NULL;
- else if( client == x.fan )
- x.fan = NULL;
- else {
- printk(KERN_ERR "g4fan: bad client\n");
- }
- kfree( client );
+ if (x.running) {
+ x.running = 0;
+ kthread_stop(x.poll_task);
+ x.poll_task = NULL;
}
- return err;
-}
+ if (client == x.thermostat)
+ x.thermostat = NULL;
+ else if (client == x.fan)
+ x.fan = NULL;
+ else
+ printk(KERN_ERR "g4fan: bad client\n");
-static struct i2c_driver g4fan_driver = {
- .driver = {
- .name = "therm_windtunnel",
- },
- .attach_adapter = do_attach,
- .detach_client = do_detach,
-};
+ return 0;
+}
static int
attach_fan( struct i2c_client *cl )
goto out;
printk("ADM1030 fan controller [@%02x]\n", cl->addr );
- strlcpy( cl->name, "ADM1030 fan controller", sizeof(cl->name) );
-
- if( !i2c_attach_client(cl) )
- x.fan = cl;
+ x.fan = cl;
out:
- if( cl != x.fan )
- kfree( cl );
return 0;
}
x.temp = temp;
x.overheat_temp = os_temp;
x.overheat_hyst = hyst_temp;
-
- strlcpy( cl->name, "DS1775 thermostat", sizeof(cl->name) );
-
- if( !i2c_attach_client(cl) )
- x.thermostat = cl;
+ x.thermostat = cl;
out:
- if( cl != x.thermostat )
- kfree( cl );
return 0;
}
+enum chip { ds1775, adm1030 };
+
+static const struct i2c_device_id therm_windtunnel_id[] = {
+ { "therm_ds1775", ds1775 },
+ { "therm_adm1030", adm1030 },
+ { }
+};
+
static int
-do_probe( struct i2c_adapter *adapter, int addr, int kind )
+do_probe(struct i2c_client *cl, const struct i2c_device_id *id)
{
- struct i2c_client *cl;
+ struct i2c_adapter *adapter = cl->adapter;
if( !i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA
| I2C_FUNC_SMBUS_WRITE_BYTE) )
return 0;
- if( !(cl=kzalloc(sizeof(*cl), GFP_KERNEL)) )
- return -ENOMEM;
-
- cl->addr = addr;
- cl->adapter = adapter;
- cl->driver = &g4fan_driver;
- cl->flags = 0;
-
- if( addr < 0x48 )
+ switch (id->driver_data) {
+ case adm1030:
return attach_fan( cl );
- return attach_thermostat( cl );
+ case ds1775:
+ return attach_thermostat(cl);
+ }
+ return 0;
}
+static struct i2c_driver g4fan_driver = {
+ .driver = {
+ .name = "therm_windtunnel",
+ },
+ .attach_adapter = do_attach,
+ .probe = do_probe,
+ .remove = do_remove,
+ .id_table = therm_windtunnel_id,
+};
+
/************************************************************************/
/* initialization / cleanup */
struct wf_lm75_sensor {
int ds1775 : 1;
int inited : 1;
- struct i2c_client i2c;
+ struct i2c_client *i2c;
struct wf_sensor sens;
};
#define wf_to_lm75(c) container_of(c, struct wf_lm75_sensor, sens)
-#define i2c_to_lm75(c) container_of(c, struct wf_lm75_sensor, i2c)
-
-static int wf_lm75_attach(struct i2c_adapter *adapter);
-static int wf_lm75_detach(struct i2c_client *client);
-
-static struct i2c_driver wf_lm75_driver = {
- .driver = {
- .name = "wf_lm75",
- },
- .attach_adapter = wf_lm75_attach,
- .detach_client = wf_lm75_detach,
-};
static int wf_lm75_get(struct wf_sensor *sr, s32 *value)
{
struct wf_lm75_sensor *lm = wf_to_lm75(sr);
s32 data;
- if (lm->i2c.adapter == NULL)
+ if (lm->i2c == NULL)
return -ENODEV;
/* Init chip if necessary */
if (!lm->inited) {
- u8 cfg_new, cfg = (u8)i2c_smbus_read_byte_data(&lm->i2c, 1);
+ u8 cfg_new, cfg = (u8)i2c_smbus_read_byte_data(lm->i2c, 1);
DBG("wf_lm75: Initializing %s, cfg was: %02x\n",
sr->name, cfg);
* the firmware for now
*/
cfg_new = cfg & ~0x01;
- i2c_smbus_write_byte_data(&lm->i2c, 1, cfg_new);
+ i2c_smbus_write_byte_data(lm->i2c, 1, cfg_new);
lm->inited = 1;
/* If we just powered it up, let's wait 200 ms */
}
/* Read temperature register */
- data = (s32)le16_to_cpu(i2c_smbus_read_word_data(&lm->i2c, 0));
+ data = (s32)le16_to_cpu(i2c_smbus_read_word_data(lm->i2c, 0));
data <<= 8;
*value = data;
{
struct wf_lm75_sensor *lm = wf_to_lm75(sr);
- /* check if client is registered and detach from i2c */
- if (lm->i2c.adapter) {
- i2c_detach_client(&lm->i2c);
- lm->i2c.adapter = NULL;
- }
-
kfree(lm);
}
.owner = THIS_MODULE,
};
-static struct wf_lm75_sensor *wf_lm75_create(struct i2c_adapter *adapter,
- u8 addr, int ds1775,
- const char *loc)
+static int wf_lm75_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
{
struct wf_lm75_sensor *lm;
int rc;
- DBG("wf_lm75: creating %s device at address 0x%02x\n",
- ds1775 ? "ds1775" : "lm75", addr);
-
lm = kzalloc(sizeof(struct wf_lm75_sensor), GFP_KERNEL);
if (lm == NULL)
- return NULL;
+ return -ENODEV;
+
+ lm->inited = 0;
+ lm->ds1775 = id->driver_data;
+ lm->i2c = client;
+ lm->sens.name = client->dev.platform_data;
+ lm->sens.ops = &wf_lm75_ops;
+ i2c_set_clientdata(client, lm);
+
+ rc = wf_register_sensor(&lm->sens);
+ if (rc) {
+ i2c_set_clientdata(client, NULL);
+ kfree(lm);
+ }
+
+ return rc;
+}
+
+static struct i2c_client *wf_lm75_create(struct i2c_adapter *adapter,
+ u8 addr, int ds1775,
+ const char *loc)
+{
+ struct i2c_board_info info;
+ struct i2c_client *client;
+ char *name;
+
+ DBG("wf_lm75: creating %s device at address 0x%02x\n",
+ ds1775 ? "ds1775" : "lm75", addr);
/* Usual rant about sensor names not beeing very consistent in
* the device-tree, oh well ...
* Add more entries below as you deal with more setups
*/
if (!strcmp(loc, "Hard drive") || !strcmp(loc, "DRIVE BAY"))
- lm->sens.name = "hd-temp";
+ name = "hd-temp";
else if (!strcmp(loc, "Incoming Air Temp"))
- lm->sens.name = "incoming-air-temp";
+ name = "incoming-air-temp";
else if (!strcmp(loc, "ODD Temp"))
- lm->sens.name = "optical-drive-temp";
+ name = "optical-drive-temp";
else if (!strcmp(loc, "HD Temp"))
- lm->sens.name = "hard-drive-temp";
+ name = "hard-drive-temp";
else
goto fail;
- lm->inited = 0;
- lm->sens.ops = &wf_lm75_ops;
- lm->ds1775 = ds1775;
- lm->i2c.addr = (addr >> 1) & 0x7f;
- lm->i2c.adapter = adapter;
- lm->i2c.driver = &wf_lm75_driver;
- strncpy(lm->i2c.name, lm->sens.name, I2C_NAME_SIZE-1);
-
- rc = i2c_attach_client(&lm->i2c);
- if (rc) {
- printk(KERN_ERR "windfarm: failed to attach %s %s to i2c,"
- " err %d\n", ds1775 ? "ds1775" : "lm75",
- lm->i2c.name, rc);
- goto fail;
- }
+ memset(&info, 0, sizeof(struct i2c_board_info));
+ info.addr = (addr >> 1) & 0x7f;
+ info.platform_data = name;
+ strlcpy(info.type, ds1775 ? "wf_ds1775" : "wf_lm75", I2C_NAME_SIZE);
- if (wf_register_sensor(&lm->sens)) {
- i2c_detach_client(&lm->i2c);
+ client = i2c_new_device(adapter, &info);
+ if (client == NULL) {
+ printk(KERN_ERR "windfarm: failed to attach %s %s to i2c\n",
+ ds1775 ? "ds1775" : "lm75", name);
goto fail;
}
- return lm;
+ /*
+ * Let i2c-core delete that device on driver removal.
+ * This is safe because i2c-core holds the core_lock mutex for us.
+ */
+ list_add_tail(&client->detected, &client->driver->clients);
+ return client;
fail:
- kfree(lm);
return NULL;
}
return 0;
}
-static int wf_lm75_detach(struct i2c_client *client)
+static int wf_lm75_remove(struct i2c_client *client)
{
- struct wf_lm75_sensor *lm = i2c_to_lm75(client);
+ struct wf_lm75_sensor *lm = i2c_get_clientdata(client);
DBG("wf_lm75: i2c detatch called for %s\n", lm->sens.name);
/* Mark client detached */
- lm->i2c.adapter = NULL;
+ lm->i2c = NULL;
/* release sensor */
wf_unregister_sensor(&lm->sens);
+ i2c_set_clientdata(client, NULL);
return 0;
}
+static const struct i2c_device_id wf_lm75_id[] = {
+ { "wf_lm75", 0 },
+ { "wf_ds1775", 1 },
+ { }
+};
+
+static struct i2c_driver wf_lm75_driver = {
+ .driver = {
+ .name = "wf_lm75",
+ },
+ .attach_adapter = wf_lm75_attach,
+ .probe = wf_lm75_probe,
+ .remove = wf_lm75_remove,
+ .id_table = wf_lm75_id,
+};
+
static int __init wf_lm75_sensor_init(void)
{
/* Don't register on old machines that use therm_pm72 for now */
#define MAX6690_EXTERNAL_TEMP 1
struct wf_6690_sensor {
- struct i2c_client i2c;
+ struct i2c_client *i2c;
struct wf_sensor sens;
};
#define wf_to_6690(x) container_of((x), struct wf_6690_sensor, sens)
-#define i2c_to_6690(x) container_of((x), struct wf_6690_sensor, i2c)
-
-static int wf_max6690_attach(struct i2c_adapter *adapter);
-static int wf_max6690_detach(struct i2c_client *client);
-
-static struct i2c_driver wf_max6690_driver = {
- .driver = {
- .name = "wf_max6690",
- },
- .attach_adapter = wf_max6690_attach,
- .detach_client = wf_max6690_detach,
-};
static int wf_max6690_get(struct wf_sensor *sr, s32 *value)
{
struct wf_6690_sensor *max = wf_to_6690(sr);
s32 data;
- if (max->i2c.adapter == NULL)
+ if (max->i2c == NULL)
return -ENODEV;
/* chip gets initialized by firmware */
- data = i2c_smbus_read_byte_data(&max->i2c, MAX6690_EXTERNAL_TEMP);
+ data = i2c_smbus_read_byte_data(max->i2c, MAX6690_EXTERNAL_TEMP);
if (data < 0)
return data;
*value = data << 16;
{
struct wf_6690_sensor *max = wf_to_6690(sr);
- if (max->i2c.adapter) {
- i2c_detach_client(&max->i2c);
- max->i2c.adapter = NULL;
- }
kfree(max);
}
.owner = THIS_MODULE,
};
-static void wf_max6690_create(struct i2c_adapter *adapter, u8 addr,
- const char *loc)
+static int wf_max6690_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
{
struct wf_6690_sensor *max;
- char *name;
+ int rc;
max = kzalloc(sizeof(struct wf_6690_sensor), GFP_KERNEL);
if (max == NULL) {
- printk(KERN_ERR "windfarm: Couldn't create MAX6690 sensor %s: "
- "no memory\n", loc);
- return;
+ printk(KERN_ERR "windfarm: Couldn't create MAX6690 sensor: "
+ "no memory\n");
+ return -ENOMEM;
+ }
+
+ max->i2c = client;
+ max->sens.name = client->dev.platform_data;
+ max->sens.ops = &wf_max6690_ops;
+ i2c_set_clientdata(client, max);
+
+ rc = wf_register_sensor(&max->sens);
+ if (rc) {
+ i2c_set_clientdata(client, NULL);
+ kfree(max);
}
+ return rc;
+}
+
+static struct i2c_client *wf_max6690_create(struct i2c_adapter *adapter,
+ u8 addr, const char *loc)
+{
+ struct i2c_board_info info;
+ struct i2c_client *client;
+ char *name;
+
if (!strcmp(loc, "BACKSIDE"))
name = "backside-temp";
else if (!strcmp(loc, "NB Ambient"))
else
goto fail;
- max->sens.ops = &wf_max6690_ops;
- max->sens.name = name;
- max->i2c.addr = addr >> 1;
- max->i2c.adapter = adapter;
- max->i2c.driver = &wf_max6690_driver;
- strncpy(max->i2c.name, name, I2C_NAME_SIZE-1);
+ memset(&info, 0, sizeof(struct i2c_board_info));
+ info.addr = addr >> 1;
+ info.platform_data = name;
+ strlcpy(info.type, "wf_max6690", I2C_NAME_SIZE);
- if (i2c_attach_client(&max->i2c)) {
+ client = i2c_new_device(adapter, &info);
+ if (client == NULL) {
printk(KERN_ERR "windfarm: failed to attach MAX6690 sensor\n");
goto fail;
}
- if (wf_register_sensor(&max->sens)) {
- i2c_detach_client(&max->i2c);
- goto fail;
- }
-
- return;
+ /*
+ * Let i2c-core delete that device on driver removal.
+ * This is safe because i2c-core holds the core_lock mutex for us.
+ */
+ list_add_tail(&client->detected, &client->driver->clients);
+ return client;
fail:
- kfree(max);
+ return NULL;
}
static int wf_max6690_attach(struct i2c_adapter *adapter)
return 0;
}
-static int wf_max6690_detach(struct i2c_client *client)
+static int wf_max6690_remove(struct i2c_client *client)
{
- struct wf_6690_sensor *max = i2c_to_6690(client);
+ struct wf_6690_sensor *max = i2c_get_clientdata(client);
- max->i2c.adapter = NULL;
+ max->i2c = NULL;
wf_unregister_sensor(&max->sens);
return 0;
}
+static const struct i2c_device_id wf_max6690_id[] = {
+ { "wf_max6690", 0 },
+ { }
+};
+
+static struct i2c_driver wf_max6690_driver = {
+ .driver = {
+ .name = "wf_max6690",
+ },
+ .attach_adapter = wf_max6690_attach,
+ .probe = wf_max6690_probe,
+ .remove = wf_max6690_remove,
+ .id_table = wf_max6690_id,
+};
+
static int __init wf_max6690_sensor_init(void)
{
/* Don't register on old machines that use therm_pm72 for now */
struct mutex mutex;
unsigned long last_read; /* jiffies when cache last updated */
u8 cache[16];
- struct i2c_client i2c;
+ struct i2c_client *i2c;
struct device_node *node;
};
};
#define wf_to_sat(c) container_of(c, struct wf_sat_sensor, sens)
-#define i2c_to_sat(c) container_of(c, struct wf_sat, i2c)
-
-static int wf_sat_attach(struct i2c_adapter *adapter);
-static int wf_sat_detach(struct i2c_client *client);
-
-static struct i2c_driver wf_sat_driver = {
- .driver = {
- .name = "wf_smu_sat",
- },
- .attach_adapter = wf_sat_attach,
- .detach_client = wf_sat_detach,
-};
struct smu_sdbp_header *smu_sat_get_sdb_partition(unsigned int sat_id, int id,
unsigned int *size)
if (sat_id > 1 || (sat = sats[sat_id]) == NULL)
return NULL;
- err = i2c_smbus_write_word_data(&sat->i2c, 8, id << 8);
+ err = i2c_smbus_write_word_data(sat->i2c, 8, id << 8);
if (err) {
printk(KERN_ERR "smu_sat_get_sdb_part wr error %d\n", err);
return NULL;
}
- err = i2c_smbus_read_word_data(&sat->i2c, 9);
+ err = i2c_smbus_read_word_data(sat->i2c, 9);
if (err < 0) {
printk(KERN_ERR "smu_sat_get_sdb_part rd len error\n");
return NULL;
return NULL;
for (i = 0; i < len; i += 4) {
- err = i2c_smbus_read_i2c_block_data(&sat->i2c, 0xa, 4, data);
+ err = i2c_smbus_read_i2c_block_data(sat->i2c, 0xa, 4, data);
if (err < 0) {
printk(KERN_ERR "smu_sat_get_sdb_part rd err %d\n",
err);
{
int err;
- err = i2c_smbus_read_i2c_block_data(&sat->i2c, 0x3f, 16, sat->cache);
+ err = i2c_smbus_read_i2c_block_data(sat->i2c, 0x3f, 16, sat->cache);
if (err < 0)
return err;
sat->last_read = jiffies;
int i, err;
s32 val;
- if (sat->i2c.adapter == NULL)
+ if (sat->i2c == NULL)
return -ENODEV;
mutex_lock(&sat->mutex);
struct wf_sat *sat = sens->sat;
if (atomic_dec_and_test(&sat->refcnt)) {
- if (sat->i2c.adapter) {
- i2c_detach_client(&sat->i2c);
- sat->i2c.adapter = NULL;
- }
if (sat->nr >= 0)
sats[sat->nr] = NULL;
kfree(sat);
static void wf_sat_create(struct i2c_adapter *adapter, struct device_node *dev)
{
+ struct i2c_board_info info;
+ struct i2c_client *client;
+ const u32 *reg;
+ u8 addr;
+
+ reg = of_get_property(dev, "reg", NULL);
+ if (reg == NULL)
+ return;
+ addr = *reg;
+ DBG(KERN_DEBUG "wf_sat: creating sat at address %x\n", addr);
+
+ memset(&info, 0, sizeof(struct i2c_board_info));
+ info.addr = (addr >> 1) & 0x7f;
+ info.platform_data = dev;
+ strlcpy(info.type, "wf_sat", I2C_NAME_SIZE);
+
+ client = i2c_new_device(adapter, &info);
+ if (client == NULL) {
+ printk(KERN_ERR "windfarm: failed to attach smu-sat to i2c\n");
+ return;
+ }
+
+ /*
+ * Let i2c-core delete that device on driver removal.
+ * This is safe because i2c-core holds the core_lock mutex for us.
+ */
+ list_add_tail(&client->detected, &client->driver->clients);
+}
+
+static int wf_sat_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct device_node *dev = client->dev.platform_data;
struct wf_sat *sat;
struct wf_sat_sensor *sens;
const u32 *reg;
const char *loc, *type;
- u8 addr, chip, core;
+ u8 chip, core;
struct device_node *child;
int shift, cpu, index;
char *name;
int vsens[2], isens[2];
- reg = of_get_property(dev, "reg", NULL);
- if (reg == NULL)
- return;
- addr = *reg;
- DBG(KERN_DEBUG "wf_sat: creating sat at address %x\n", addr);
-
sat = kzalloc(sizeof(struct wf_sat), GFP_KERNEL);
if (sat == NULL)
- return;
+ return -ENOMEM;
sat->nr = -1;
sat->node = of_node_get(dev);
atomic_set(&sat->refcnt, 0);
mutex_init(&sat->mutex);
- sat->i2c.addr = (addr >> 1) & 0x7f;
- sat->i2c.adapter = adapter;
- sat->i2c.driver = &wf_sat_driver;
- strncpy(sat->i2c.name, "smu-sat", I2C_NAME_SIZE-1);
-
- if (i2c_attach_client(&sat->i2c)) {
- printk(KERN_ERR "windfarm: failed to attach smu-sat to i2c\n");
- goto fail;
- }
+ sat->i2c = client;
+ i2c_set_clientdata(client, sat);
vsens[0] = vsens[1] = -1;
isens[0] = isens[1] = -1;
if (sat->nr >= 0)
sats[sat->nr] = sat;
- return;
-
- fail:
- kfree(sat);
+ return 0;
}
static int wf_sat_attach(struct i2c_adapter *adapter)
return 0;
}
-static int wf_sat_detach(struct i2c_client *client)
+static int wf_sat_remove(struct i2c_client *client)
{
- struct wf_sat *sat = i2c_to_sat(client);
+ struct wf_sat *sat = i2c_get_clientdata(client);
/* XXX TODO */
- sat->i2c.adapter = NULL;
+ sat->i2c = NULL;
+ i2c_set_clientdata(client, NULL);
return 0;
}
+static const struct i2c_device_id wf_sat_id[] = {
+ { "wf_sat", 0 },
+ { }
+};
+
+static struct i2c_driver wf_sat_driver = {
+ .driver = {
+ .name = "wf_smu_sat",
+ },
+ .attach_adapter = wf_sat_attach,
+ .probe = wf_sat_probe,
+ .remove = wf_sat_remove,
+ .id_table = wf_sat_id,
+};
+
static int __init sat_sensors_init(void)
{
return i2c_add_driver(&wf_sat_driver);
This driver can also be built as a module. If so, the module
will be called eeprom.
+config EEPROM_MAX6875
+ tristate "Maxim MAX6874/5 power supply supervisor"
+ depends on I2C && EXPERIMENTAL
+ help
+ If you say yes here you get read-only support for the user EEPROM of
+ the Maxim MAX6874/5 EEPROM-programmable, quad power-supply
+ sequencer/supervisor.
+
+ All other features of this chip should be accessed via i2c-dev.
+
+ This driver can also be built as a module. If so, the module
+ will be called max6875.
+
+
config EEPROM_93CX6
tristate "EEPROM 93CX6 support"
help
obj-$(CONFIG_EEPROM_AT24) += at24.o
obj-$(CONFIG_EEPROM_AT25) += at25.o
obj-$(CONFIG_EEPROM_LEGACY) += eeprom.o
+obj-$(CONFIG_EEPROM_MAX6875) += max6875.o
obj-$(CONFIG_EEPROM_93CX6) += eeprom_93cx6.o
--- /dev/null
+/*
+ max6875.c - driver for MAX6874/MAX6875
+
+ Copyright (C) 2005 Ben Gardner <bgardner@wabtec.com>
+
+ Based on eeprom.c
+
+ The MAX6875 has a bank of registers and two banks of EEPROM.
+ Address ranges are defined as follows:
+ * 0x0000 - 0x0046 = configuration registers
+ * 0x8000 - 0x8046 = configuration EEPROM
+ * 0x8100 - 0x82FF = user EEPROM
+
+ This driver makes the user EEPROM available for read.
+
+ The registers & config EEPROM should be accessed via i2c-dev.
+
+ The MAX6875 ignores the lowest address bit, so each chip responds to
+ two addresses - 0x50/0x51 and 0x52/0x53.
+
+ Note that the MAX6875 uses i2c_smbus_write_byte_data() to set the read
+ address, so this driver is destructive if loaded for the wrong EEPROM chip.
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; version 2 of the License.
+*/
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/i2c.h>
+#include <linux/mutex.h>
+
+/* Do not scan - the MAX6875 access method will write to some EEPROM chips */
+static const unsigned short normal_i2c[] = { I2C_CLIENT_END };
+
+/* Insmod parameters */
+I2C_CLIENT_INSMOD_1(max6875);
+
+/* The MAX6875 can only read/write 16 bytes at a time */
+#define SLICE_SIZE 16
+#define SLICE_BITS 4
+
+/* USER EEPROM is at addresses 0x8100 - 0x82FF */
+#define USER_EEPROM_BASE 0x8100
+#define USER_EEPROM_SIZE 0x0200
+#define USER_EEPROM_SLICES 32
+
+/* MAX6875 commands */
+#define MAX6875_CMD_BLK_READ 0x84
+
+/* Each client has this additional data */
+struct max6875_data {
+ struct i2c_client *fake_client;
+ struct mutex update_lock;
+
+ u32 valid;
+ u8 data[USER_EEPROM_SIZE];
+ unsigned long last_updated[USER_EEPROM_SLICES];
+};
+
+static void max6875_update_slice(struct i2c_client *client, int slice)
+{
+ struct max6875_data *data = i2c_get_clientdata(client);
+ int i, j, addr;
+ u8 *buf;
+
+ if (slice >= USER_EEPROM_SLICES)
+ return;
+
+ mutex_lock(&data->update_lock);
+
+ buf = &data->data[slice << SLICE_BITS];
+
+ if (!(data->valid & (1 << slice)) ||
+ time_after(jiffies, data->last_updated[slice])) {
+
+ dev_dbg(&client->dev, "Starting update of slice %u\n", slice);
+
+ data->valid &= ~(1 << slice);
+
+ addr = USER_EEPROM_BASE + (slice << SLICE_BITS);
+
+ /* select the eeprom address */
+ if (i2c_smbus_write_byte_data(client, addr >> 8, addr & 0xFF)) {
+ dev_err(&client->dev, "address set failed\n");
+ goto exit_up;
+ }
+
+ if (i2c_check_functionality(client->adapter,
+ I2C_FUNC_SMBUS_READ_I2C_BLOCK)) {
+ if (i2c_smbus_read_i2c_block_data(client,
+ MAX6875_CMD_BLK_READ,
+ SLICE_SIZE,
+ buf) != SLICE_SIZE) {
+ goto exit_up;
+ }
+ } else {
+ for (i = 0; i < SLICE_SIZE; i++) {
+ j = i2c_smbus_read_byte(client);
+ if (j < 0) {
+ goto exit_up;
+ }
+ buf[i] = j;
+ }
+ }
+ data->last_updated[slice] = jiffies;
+ data->valid |= (1 << slice);
+ }
+exit_up:
+ mutex_unlock(&data->update_lock);
+}
+
+static ssize_t max6875_read(struct kobject *kobj,
+ struct bin_attribute *bin_attr,
+ char *buf, loff_t off, size_t count)
+{
+ struct i2c_client *client = kobj_to_i2c_client(kobj);
+ struct max6875_data *data = i2c_get_clientdata(client);
+ int slice, max_slice;
+
+ if (off > USER_EEPROM_SIZE)
+ return 0;
+
+ if (off + count > USER_EEPROM_SIZE)
+ count = USER_EEPROM_SIZE - off;
+
+ /* refresh slices which contain requested bytes */
+ max_slice = (off + count - 1) >> SLICE_BITS;
+ for (slice = (off >> SLICE_BITS); slice <= max_slice; slice++)
+ max6875_update_slice(client, slice);
+
+ memcpy(buf, &data->data[off], count);
+
+ return count;
+}
+
+static struct bin_attribute user_eeprom_attr = {
+ .attr = {
+ .name = "eeprom",
+ .mode = S_IRUGO,
+ },
+ .size = USER_EEPROM_SIZE,
+ .read = max6875_read,
+};
+
+/* Return 0 if detection is successful, -ENODEV otherwise */
+static int max6875_detect(struct i2c_client *client, int kind,
+ struct i2c_board_info *info)
+{
+ struct i2c_adapter *adapter = client->adapter;
+
+ if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WRITE_BYTE_DATA
+ | I2C_FUNC_SMBUS_READ_BYTE))
+ return -ENODEV;
+
+ /* Only check even addresses */
+ if (client->addr & 1)
+ return -ENODEV;
+
+ strlcpy(info->type, "max6875", I2C_NAME_SIZE);
+
+ return 0;
+}
+
+static int max6875_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct max6875_data *data;
+ int err;
+
+ if (!(data = kzalloc(sizeof(struct max6875_data), GFP_KERNEL)))
+ return -ENOMEM;
+
+ /* A fake client is created on the odd address */
+ data->fake_client = i2c_new_dummy(client->adapter, client->addr + 1);
+ if (!data->fake_client) {
+ err = -ENOMEM;
+ goto exit_kfree;
+ }
+
+ /* Init real i2c_client */
+ i2c_set_clientdata(client, data);
+ mutex_init(&data->update_lock);
+
+ err = sysfs_create_bin_file(&client->dev.kobj, &user_eeprom_attr);
+ if (err)
+ goto exit_remove_fake;
+
+ return 0;
+
+exit_remove_fake:
+ i2c_unregister_device(data->fake_client);
+exit_kfree:
+ kfree(data);
+ return err;
+}
+
+static int max6875_remove(struct i2c_client *client)
+{
+ struct max6875_data *data = i2c_get_clientdata(client);
+
+ i2c_unregister_device(data->fake_client);
+
+ sysfs_remove_bin_file(&client->dev.kobj, &user_eeprom_attr);
+ kfree(data);
+
+ return 0;
+}
+
+static const struct i2c_device_id max6875_id[] = {
+ { "max6875", 0 },
+ { }
+};
+
+static struct i2c_driver max6875_driver = {
+ .driver = {
+ .name = "max6875",
+ },
+ .probe = max6875_probe,
+ .remove = max6875_remove,
+ .id_table = max6875_id,
+
+ .detect = max6875_detect,
+ .address_data = &addr_data,
+};
+
+static int __init max6875_init(void)
+{
+ return i2c_add_driver(&max6875_driver);
+}
+
+static void __exit max6875_exit(void)
+{
+ i2c_del_driver(&max6875_driver);
+}
+
+
+MODULE_AUTHOR("Ben Gardner <bgardner@wabtec.com>");
+MODULE_DESCRIPTION("MAX6875 driver");
+MODULE_LICENSE("GPL");
+
+module_init(max6875_init);
+module_exit(max6875_exit);
strlcpy(chan->adapter.name, name, sizeof(chan->adapter.name));
chan->adapter.owner = THIS_MODULE;
- chan->adapter.class = I2C_CLASS_TV_ANALOG;
chan->adapter.algo_data = &chan->algo;
chan->adapter.dev.parent = dev;
chan->algo.setsda = tdfxfb_i2c_setsda;
projects / firefly-linux-kernel-4.4.55.git / commitdiff