1 files changed, 72 insertions, 0 deletions

diff --git a/drivers/i2c/busses/i2c-isa.c b/drivers/i2c/busses/i2c-isa.c
new file mode 100644
index 000000000000..0f54a2a0afa5
--- /dev/null
+++ b/drivers/i2c/busses/i2c-isa.c
@@ -0,0 +1,72 @@
+/*
+    i2c-isa.c - Part of lm_sensors, Linux kernel modules for hardware
+            monitoring
+    Copyright (c) 1998, 1999  Frodo Looijaard <frodol@dds.nl> 
+
+    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.
+*/
+
+/* This implements an i2c algorithm/adapter for ISA bus. Not that this is
+   on first sight very useful; almost no functionality is preserved.
+   Except that it makes writing drivers for chips which can be on both
+   the SMBus and the ISA bus very much easier. See lm78.c for an example
+   of this. */
+
+#include <linux/config.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/i2c.h>
+
+static u32 isa_func(struct i2c_adapter *adapter);
+
+/* This is the actual algorithm we define */
+static struct i2c_algorithm isa_algorithm = {
+        .name           = "ISA bus algorithm",
+        .id             = I2C_ALGO_ISA,
+        .functionality  = isa_func,
+};
+
+/* There can only be one... */
+static struct i2c_adapter isa_adapter = {
+        .owner          = THIS_MODULE,
+        .class          = I2C_CLASS_HWMON,
+        .algo           = &isa_algorithm,
+        .name           = "ISA main adapter",
+};
+
+/* We can't do a thing... */
+static u32 isa_func(struct i2c_adapter *adapter)
+{
+        return 0;
+}
+
+static int __init i2c_isa_init(void)
+{
+        return i2c_add_adapter(&isa_adapter);
+}
+
+static void __exit i2c_isa_exit(void)
+{
+        i2c_del_adapter(&isa_adapter);
+}
+
+MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl>");
+MODULE_DESCRIPTION("ISA bus access through i2c");
+MODULE_LICENSE("GPL");
+
+module_init(i2c_isa_init);
+module_exit(i2c_isa_exit);