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
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);
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);
projects / linux-block.git / commitdiff