diff options
Diffstat (limited to 'target/linux/ixp4xx/patches/800-eeprom_new_notifier.patch')
| -rw-r--r-- | target/linux/ixp4xx/patches/800-eeprom_new_notifier.patch | 201 |
1 files changed, 0 insertions, 201 deletions
diff --git a/target/linux/ixp4xx/patches/800-eeprom_new_notifier.patch b/target/linux/ixp4xx/patches/800-eeprom_new_notifier.patch deleted file mode 100644 index d10153ef81..0000000000 --- a/target/linux/ixp4xx/patches/800-eeprom_new_notifier.patch +++ /dev/null @@ -1,201 +0,0 @@ -Add EEPROM notifiers - -These help board level code by allowing a callback when EEPROMs are -loaded, this permits system level configuration to be loaded from the -EEPROM. This is particularly useful when the ethernet MAC ids are -stored in EEPROM and when the ethernet hardware is generic (so it -has no board level knowledge), then the MACs can be loaded into -the 'maclist' code and read out by the ethernet config. - -Signed-off-by: John Bowler <jbowler@acm.org> - -Index: linux-2.6.21.7/drivers/i2c/chips/eeprom.c -=================================================================== ---- linux-2.6.21.7.orig/drivers/i2c/chips/eeprom.c -+++ linux-2.6.21.7/drivers/i2c/chips/eeprom.c -@@ -33,6 +33,8 @@ - #include <linux/jiffies.h> - #include <linux/i2c.h> - #include <linux/mutex.h> -+#include <linux/notifier.h> -+#include <linux/eeprom.h> - - /* Addresses to scan */ - static unsigned short normal_i2c[] = { 0x50, 0x51, 0x52, 0x53, 0x54, -@@ -41,26 +43,7 @@ static unsigned short normal_i2c[] = { 0 - /* 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 i2c_client client; -- 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; --}; -- -+ATOMIC_NOTIFIER_HEAD(eeprom_chain); - - static int eeprom_attach_adapter(struct i2c_adapter *adapter); - static int eeprom_detect(struct i2c_adapter *adapter, int address, int kind); -@@ -189,6 +172,7 @@ static int eeprom_detect(struct i2c_adap - data->valid = 0; - mutex_init(&data->update_lock); - data->nature = UNKNOWN; -+ data->attr = &eeprom_attr; - - /* Tell the I2C layer a new client has arrived */ - if ((err = i2c_attach_client(new_client))) -@@ -212,6 +196,9 @@ static int eeprom_detect(struct i2c_adap - if (err) - goto exit_detach; - -+ /* call the notifier chain */ -+ atomic_notifier_call_chain(&eeprom_chain, EEPROM_REGISTER, data); -+ - return 0; - - exit_detach: -@@ -237,6 +224,41 @@ static int eeprom_detach_client(struct i - return 0; - } - -+/** -+ * register_eeprom_notifier - register a 'user' of EEPROM devices. -+ * @nb: pointer to notifier info structure -+ * -+ * Registers a callback function to be called upon detection -+ * of an EEPROM device. Detection invokes the 'add' callback -+ * with the kobj of the mutex and a bin_attribute which allows -+ * read from the EEPROM. The intention is that the notifier -+ * will be able to read system configuration from the notifier. -+ * -+ * Only EEPROMs detected *after* the addition of the notifier -+ * are notified. I.e. EEPROMs already known to the system -+ * will not be notified - add the notifier from board level -+ * code! -+ */ -+int register_eeprom_notifier(struct notifier_block *nb) -+{ -+ return atomic_notifier_chain_register(&eeprom_chain, nb); -+} -+ -+/** -+ * unregister_eeprom_notifier - unregister a 'user' of EEPROM devices. -+ * @old: pointer to notifier info structure -+ * -+ * Removes a callback function from the list of 'users' to be -+ * notified upon detection of EEPROM devices. -+ */ -+int unregister_eeprom_notifier(struct notifier_block *nb) -+{ -+ return atomic_notifier_chain_unregister(&eeprom_chain, nb); -+} -+ -+EXPORT_SYMBOL_GPL(register_eeprom_notifier); -+EXPORT_SYMBOL_GPL(unregister_eeprom_notifier); -+ - static int __init eeprom_init(void) - { - return i2c_add_driver(&eeprom_driver); -Index: linux-2.6.21.7/include/linux/eeprom.h -=================================================================== ---- /dev/null -+++ linux-2.6.21.7/include/linux/eeprom.h -@@ -0,0 +1,71 @@ -+#ifndef _LINUX_EEPROM_H -+#define _LINUX_EEPROM_H -+/* -+ * $Id: 45-eeprom-new-notifier.patch,v 1.2 2006/03/27 11:10:19 azummo Exp $ -+ * -+ * Copyright (C) 2006 John Bowler -+ */ -+ -+/* -+ * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA -+ */ -+ -+#ifndef __KERNEL__ -+#error This is a kernel header -+#endif -+ -+#include <linux/list.h> -+#include <linux/kobject.h> -+#include <linux/sysfs.h> -+ -+/* 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 i2c_client client; -+ 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; -+ struct bin_attribute *attr; -+}; -+ -+/* -+ * This is very basic. -+ * -+ * If an EEPROM is detected on the I2C bus (this only works for -+ * I2C EEPROMs) the notifier chain is called with -+ * both the I2C information and the kobject for the sysfs -+ * device which has been registers. It is then possible to -+ * read from the device via the bin_attribute::read method -+ * to extract configuration information. -+ * -+ * Register the notifier in the board level code, there is no -+ * need to unregister it but you can if you want (it will save -+ * a little bit or kernel memory to do so). -+ */ -+ -+extern int register_eeprom_notifier(struct notifier_block *nb); -+extern int unregister_eeprom_notifier(struct notifier_block *nb); -+ -+#endif /* _LINUX_EEPROM_H */ -Index: linux-2.6.21.7/include/linux/notifier.h -=================================================================== ---- linux-2.6.21.7.orig/include/linux/notifier.h -+++ linux-2.6.21.7/include/linux/notifier.h -@@ -187,5 +187,8 @@ extern int srcu_notifier_call_chain(stru - #define CPU_DOWN_FAILED 0x0006 /* CPU (unsigned)v NOT going down */ - #define CPU_DEAD 0x0007 /* CPU (unsigned)v dead */ - -+/* eeprom notifier chain */ -+#define EEPROM_REGISTER 0x0001 -+ - #endif /* __KERNEL__ */ - #endif /* _LINUX_NOTIFIER_H */ |