Update Kconfig text to specify this driver as I2C.
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
This driver can also be built as a module. If so, the module
will be called ds1682.
-config SENSORS_EEPROM
- tristate "EEPROM reader"
- depends on EXPERIMENTAL
- help
- If you say yes here you get read-only access to the EEPROM data
- available on modern memory DIMMs and Sony Vaio laptops. Such
- EEPROMs could theoretically be available on other devices as well.
-
- This driver can also be built as a module. If so, the module
- will be called eeprom.
-
config SENSORS_PCF8574
tristate "Philips PCF8574 and PCF8574A (DEPRECATED)"
depends on EXPERIMENTAL && GPIO_PCF857X = "n"
#
obj-$(CONFIG_DS1682) += ds1682.o
-obj-$(CONFIG_SENSORS_EEPROM) += eeprom.o
obj-$(CONFIG_SENSORS_MAX6875) += max6875.o
obj-$(CONFIG_SENSORS_PCA9539) += pca9539.o
obj-$(CONFIG_SENSORS_PCF8574) += pcf8574.o
+++ /dev/null
-/*
- Copyright (C) 1998, 1999 Frodo Looijaard <frodol@dds.nl> and
- Philip Edelbrock <phil@netroedge.com>
- Copyright (C) 2003 Greg Kroah-Hartman <greg@kroah.com>
- Copyright (C) 2003 IBM Corp.
- Copyright (C) 2004 Jean Delvare <khali@linux-fr.org>
-
- 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; either version 2 of the License, or
- (at your option) any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-*/
-
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/module.h>
-#include <linux/slab.h>
-#include <linux/jiffies.h>
-#include <linux/i2c.h>
-#include <linux/mutex.h>
-
-/* Addresses to scan */
-static const unsigned short normal_i2c[] = { 0x50, 0x51, 0x52, 0x53, 0x54,
- 0x55, 0x56, 0x57, I2C_CLIENT_END };
-
-/* Insmod parameters */
-I2C_CLIENT_INSMOD_1(eeprom);
-
-
-/* Size of EEPROM in bytes */
-#define EEPROM_SIZE 256
-
-/* possible types of eeprom devices */
-enum eeprom_nature {
- UNKNOWN,
- VAIO,
-};
-
-/* Each client has this additional data */
-struct eeprom_data {
- struct mutex update_lock;
- u8 valid; /* bitfield, bit!=0 if slice is valid */
- unsigned long last_updated[8]; /* In jiffies, 8 slices */
- u8 data[EEPROM_SIZE]; /* Register values */
- enum eeprom_nature nature;
-};
-
-
-static void eeprom_update_client(struct i2c_client *client, u8 slice)
-{
- struct eeprom_data *data = i2c_get_clientdata(client);
- int i;
-
- mutex_lock(&data->update_lock);
-
- if (!(data->valid & (1 << slice)) ||
- time_after(jiffies, data->last_updated[slice] + 300 * HZ)) {
- dev_dbg(&client->dev, "Starting eeprom update, slice %u\n", slice);
-
- if (i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_READ_I2C_BLOCK)) {
- for (i = slice << 5; i < (slice + 1) << 5; i += 32)
- if (i2c_smbus_read_i2c_block_data(client, i,
- 32, data->data + i)
- != 32)
- goto exit;
- } else {
- for (i = slice << 5; i < (slice + 1) << 5; i += 2) {
- int word = i2c_smbus_read_word_data(client, i);
- if (word < 0)
- goto exit;
- data->data[i] = word & 0xff;
- data->data[i + 1] = word >> 8;
- }
- }
- data->last_updated[slice] = jiffies;
- data->valid |= (1 << slice);
- }
-exit:
- mutex_unlock(&data->update_lock);
-}
-
-static ssize_t eeprom_read(struct kobject *kobj, struct bin_attribute *bin_attr,
- char *buf, loff_t off, size_t count)
-{
- struct i2c_client *client = to_i2c_client(container_of(kobj, struct device, kobj));
- struct eeprom_data *data = i2c_get_clientdata(client);
- u8 slice;
-
- if (off > EEPROM_SIZE)
- return 0;
- if (off + count > EEPROM_SIZE)
- count = EEPROM_SIZE - off;
-
- /* Only refresh slices which contain requested bytes */
- for (slice = off >> 5; slice <= (off + count - 1) >> 5; slice++)
- eeprom_update_client(client, slice);
-
- /* Hide Vaio private settings to regular users:
- - BIOS passwords: bytes 0x00 to 0x0f
- - UUID: bytes 0x10 to 0x1f
- - Serial number: 0xc0 to 0xdf */
- if (data->nature == VAIO && !capable(CAP_SYS_ADMIN)) {
- int i;
-
- for (i = 0; i < count; i++) {
- if ((off + i <= 0x1f) ||
- (off + i >= 0xc0 && off + i <= 0xdf))
- buf[i] = 0;
- else
- buf[i] = data->data[off + i];
- }
- } else {
- memcpy(buf, &data->data[off], count);
- }
-
- return count;
-}
-
-static struct bin_attribute eeprom_attr = {
- .attr = {
- .name = "eeprom",
- .mode = S_IRUGO,
- },
- .size = EEPROM_SIZE,
- .read = eeprom_read,
-};
-
-/* Return 0 if detection is successful, -ENODEV otherwise */
-static int eeprom_detect(struct i2c_client *client, int kind,
- struct i2c_board_info *info)
-{
- struct i2c_adapter *adapter = client->adapter;
-
- /* EDID EEPROMs are often 24C00 EEPROMs, which answer to all
- addresses 0x50-0x57, but we only care about 0x50. So decline
- attaching to addresses >= 0x51 on DDC buses */
- if (!(adapter->class & I2C_CLASS_SPD) && client->addr >= 0x51)
- return -ENODEV;
-
- /* There are four ways we can read the EEPROM data:
- (1) I2C block reads (faster, but unsupported by most adapters)
- (2) Word reads (128% overhead)
- (3) Consecutive byte reads (88% overhead, unsafe)
- (4) Regular byte data reads (265% overhead)
- The third and fourth methods are not implemented by this driver
- because all known adapters support one of the first two. */
- if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_READ_WORD_DATA)
- && !i2c_check_functionality(adapter, I2C_FUNC_SMBUS_READ_I2C_BLOCK))
- return -ENODEV;
-
- strlcpy(info->type, "eeprom", I2C_NAME_SIZE);
-
- return 0;
-}
-
-static int eeprom_probe(struct i2c_client *client,
- const struct i2c_device_id *id)
-{
- struct i2c_adapter *adapter = client->adapter;
- struct eeprom_data *data;
- int err;
-
- if (!(data = kzalloc(sizeof(struct eeprom_data), GFP_KERNEL))) {
- err = -ENOMEM;
- goto exit;
- }
-
- memset(data->data, 0xff, EEPROM_SIZE);
- i2c_set_clientdata(client, data);
- mutex_init(&data->update_lock);
- data->nature = UNKNOWN;
-
- /* Detect the Vaio nature of EEPROMs.
- We use the "PCG-" or "VGN-" prefix as the signature. */
- if (client->addr == 0x57
- && i2c_check_functionality(adapter, I2C_FUNC_SMBUS_READ_BYTE_DATA)) {
- char name[4];
-
- name[0] = i2c_smbus_read_byte_data(client, 0x80);
- name[1] = i2c_smbus_read_byte_data(client, 0x81);
- name[2] = i2c_smbus_read_byte_data(client, 0x82);
- name[3] = i2c_smbus_read_byte_data(client, 0x83);
-
- if (!memcmp(name, "PCG-", 4) || !memcmp(name, "VGN-", 4)) {
- dev_info(&client->dev, "Vaio EEPROM detected, "
- "enabling privacy protection\n");
- data->nature = VAIO;
- }
- }
-
- /* create the sysfs eeprom file */
- err = sysfs_create_bin_file(&client->dev.kobj, &eeprom_attr);
- if (err)
- goto exit_kfree;
-
- return 0;
-
-exit_kfree:
- kfree(data);
-exit:
- return err;
-}
-
-static int eeprom_remove(struct i2c_client *client)
-{
- sysfs_remove_bin_file(&client->dev.kobj, &eeprom_attr);
- kfree(i2c_get_clientdata(client));
-
- return 0;
-}
-
-static const struct i2c_device_id eeprom_id[] = {
- { "eeprom", 0 },
- { }
-};
-
-static struct i2c_driver eeprom_driver = {
- .driver = {
- .name = "eeprom",
- },
- .probe = eeprom_probe,
- .remove = eeprom_remove,
- .id_table = eeprom_id,
-
- .class = I2C_CLASS_DDC | I2C_CLASS_SPD,
- .detect = eeprom_detect,
- .address_data = &addr_data,
-};
-
-static int __init eeprom_init(void)
-{
- return i2c_add_driver(&eeprom_driver);
-}
-
-static void __exit eeprom_exit(void)
-{
- i2c_del_driver(&eeprom_driver);
-}
-
-
-MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl> and "
- "Philip Edelbrock <phil@netroedge.com> and "
- "Greg Kroah-Hartman <greg@kroah.com>");
-MODULE_DESCRIPTION("I2C EEPROM driver");
-MODULE_LICENSE("GPL");
-
-module_init(eeprom_init);
-module_exit(eeprom_exit);
This driver can also be built as a module. If so, the module
will be called at24.
+config SENSORS_EEPROM
+ tristate "Old I2C EEPROM reader"
+ depends on I2C && EXPERIMENTAL
+ help
+ If you say yes here you get read-only access to the EEPROM data
+ available on modern memory DIMMs and Sony Vaio laptops via I2C. Such
+ EEPROMs could theoretically be available on other devices as well.
+
+ This driver can also be built as a module. If so, the module
+ will be called eeprom.
+
endmenu
obj-$(CONFIG_AT24) += at24.o
+obj-$(CONFIG_SENSORS_EEPROM) += eeprom.o
--- /dev/null
+/*
+ Copyright (C) 1998, 1999 Frodo Looijaard <frodol@dds.nl> and
+ Philip Edelbrock <phil@netroedge.com>
+ Copyright (C) 2003 Greg Kroah-Hartman <greg@kroah.com>
+ Copyright (C) 2003 IBM Corp.
+ Copyright (C) 2004 Jean Delvare <khali@linux-fr.org>
+
+ 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; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/jiffies.h>
+#include <linux/i2c.h>
+#include <linux/mutex.h>
+
+/* Addresses to scan */
+static const unsigned short normal_i2c[] = { 0x50, 0x51, 0x52, 0x53, 0x54,
+ 0x55, 0x56, 0x57, I2C_CLIENT_END };
+
+/* Insmod parameters */
+I2C_CLIENT_INSMOD_1(eeprom);
+
+
+/* Size of EEPROM in bytes */
+#define EEPROM_SIZE 256
+
+/* possible types of eeprom devices */
+enum eeprom_nature {
+ UNKNOWN,
+ VAIO,
+};
+
+/* Each client has this additional data */
+struct eeprom_data {
+ struct mutex update_lock;
+ u8 valid; /* bitfield, bit!=0 if slice is valid */
+ unsigned long last_updated[8]; /* In jiffies, 8 slices */
+ u8 data[EEPROM_SIZE]; /* Register values */
+ enum eeprom_nature nature;
+};
+
+
+static void eeprom_update_client(struct i2c_client *client, u8 slice)
+{
+ struct eeprom_data *data = i2c_get_clientdata(client);
+ int i;
+
+ mutex_lock(&data->update_lock);
+
+ if (!(data->valid & (1 << slice)) ||
+ time_after(jiffies, data->last_updated[slice] + 300 * HZ)) {
+ dev_dbg(&client->dev, "Starting eeprom update, slice %u\n", slice);
+
+ if (i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_READ_I2C_BLOCK)) {
+ for (i = slice << 5; i < (slice + 1) << 5; i += 32)
+ if (i2c_smbus_read_i2c_block_data(client, i,
+ 32, data->data + i)
+ != 32)
+ goto exit;
+ } else {
+ for (i = slice << 5; i < (slice + 1) << 5; i += 2) {
+ int word = i2c_smbus_read_word_data(client, i);
+ if (word < 0)
+ goto exit;
+ data->data[i] = word & 0xff;
+ data->data[i + 1] = word >> 8;
+ }
+ }
+ data->last_updated[slice] = jiffies;
+ data->valid |= (1 << slice);
+ }
+exit:
+ mutex_unlock(&data->update_lock);
+}
+
+static ssize_t eeprom_read(struct kobject *kobj, struct bin_attribute *bin_attr,
+ char *buf, loff_t off, size_t count)
+{
+ struct i2c_client *client = to_i2c_client(container_of(kobj, struct device, kobj));
+ struct eeprom_data *data = i2c_get_clientdata(client);
+ u8 slice;
+
+ if (off > EEPROM_SIZE)
+ return 0;
+ if (off + count > EEPROM_SIZE)
+ count = EEPROM_SIZE - off;
+
+ /* Only refresh slices which contain requested bytes */
+ for (slice = off >> 5; slice <= (off + count - 1) >> 5; slice++)
+ eeprom_update_client(client, slice);
+
+ /* Hide Vaio private settings to regular users:
+ - BIOS passwords: bytes 0x00 to 0x0f
+ - UUID: bytes 0x10 to 0x1f
+ - Serial number: 0xc0 to 0xdf */
+ if (data->nature == VAIO && !capable(CAP_SYS_ADMIN)) {
+ int i;
+
+ for (i = 0; i < count; i++) {
+ if ((off + i <= 0x1f) ||
+ (off + i >= 0xc0 && off + i <= 0xdf))
+ buf[i] = 0;
+ else
+ buf[i] = data->data[off + i];
+ }
+ } else {
+ memcpy(buf, &data->data[off], count);
+ }
+
+ return count;
+}
+
+static struct bin_attribute eeprom_attr = {
+ .attr = {
+ .name = "eeprom",
+ .mode = S_IRUGO,
+ },
+ .size = EEPROM_SIZE,
+ .read = eeprom_read,
+};
+
+/* Return 0 if detection is successful, -ENODEV otherwise */
+static int eeprom_detect(struct i2c_client *client, int kind,
+ struct i2c_board_info *info)
+{
+ struct i2c_adapter *adapter = client->adapter;
+
+ /* EDID EEPROMs are often 24C00 EEPROMs, which answer to all
+ addresses 0x50-0x57, but we only care about 0x50. So decline
+ attaching to addresses >= 0x51 on DDC buses */
+ if (!(adapter->class & I2C_CLASS_SPD) && client->addr >= 0x51)
+ return -ENODEV;
+
+ /* There are four ways we can read the EEPROM data:
+ (1) I2C block reads (faster, but unsupported by most adapters)
+ (2) Word reads (128% overhead)
+ (3) Consecutive byte reads (88% overhead, unsafe)
+ (4) Regular byte data reads (265% overhead)
+ The third and fourth methods are not implemented by this driver
+ because all known adapters support one of the first two. */
+ if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_READ_WORD_DATA)
+ && !i2c_check_functionality(adapter, I2C_FUNC_SMBUS_READ_I2C_BLOCK))
+ return -ENODEV;
+
+ strlcpy(info->type, "eeprom", I2C_NAME_SIZE);
+
+ return 0;
+}
+
+static int eeprom_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct i2c_adapter *adapter = client->adapter;
+ struct eeprom_data *data;
+ int err;
+
+ if (!(data = kzalloc(sizeof(struct eeprom_data), GFP_KERNEL))) {
+ err = -ENOMEM;
+ goto exit;
+ }
+
+ memset(data->data, 0xff, EEPROM_SIZE);
+ i2c_set_clientdata(client, data);
+ mutex_init(&data->update_lock);
+ data->nature = UNKNOWN;
+
+ /* Detect the Vaio nature of EEPROMs.
+ We use the "PCG-" or "VGN-" prefix as the signature. */
+ if (client->addr == 0x57
+ && i2c_check_functionality(adapter, I2C_FUNC_SMBUS_READ_BYTE_DATA)) {
+ char name[4];
+
+ name[0] = i2c_smbus_read_byte_data(client, 0x80);
+ name[1] = i2c_smbus_read_byte_data(client, 0x81);
+ name[2] = i2c_smbus_read_byte_data(client, 0x82);
+ name[3] = i2c_smbus_read_byte_data(client, 0x83);
+
+ if (!memcmp(name, "PCG-", 4) || !memcmp(name, "VGN-", 4)) {
+ dev_info(&client->dev, "Vaio EEPROM detected, "
+ "enabling privacy protection\n");
+ data->nature = VAIO;
+ }
+ }
+
+ /* create the sysfs eeprom file */
+ err = sysfs_create_bin_file(&client->dev.kobj, &eeprom_attr);
+ if (err)
+ goto exit_kfree;
+
+ return 0;
+
+exit_kfree:
+ kfree(data);
+exit:
+ return err;
+}
+
+static int eeprom_remove(struct i2c_client *client)
+{
+ sysfs_remove_bin_file(&client->dev.kobj, &eeprom_attr);
+ kfree(i2c_get_clientdata(client));
+
+ return 0;
+}
+
+static const struct i2c_device_id eeprom_id[] = {
+ { "eeprom", 0 },
+ { }
+};
+
+static struct i2c_driver eeprom_driver = {
+ .driver = {
+ .name = "eeprom",
+ },
+ .probe = eeprom_probe,
+ .remove = eeprom_remove,
+ .id_table = eeprom_id,
+
+ .class = I2C_CLASS_DDC | I2C_CLASS_SPD,
+ .detect = eeprom_detect,
+ .address_data = &addr_data,
+};
+
+static int __init eeprom_init(void)
+{
+ return i2c_add_driver(&eeprom_driver);
+}
+
+static void __exit eeprom_exit(void)
+{
+ i2c_del_driver(&eeprom_driver);
+}
+
+
+MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl> and "
+ "Philip Edelbrock <phil@netroedge.com> and "
+ "Greg Kroah-Hartman <greg@kroah.com>");
+MODULE_DESCRIPTION("I2C EEPROM driver");
+MODULE_LICENSE("GPL");
+
+module_init(eeprom_init);
+module_exit(eeprom_exit);
projects / GitHub / exynos8895 / android_kernel_samsung_universal8895.git / commitdiff