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Diffstat (limited to 'drivers/i2c/busses/i2c-isa.c')
-rw-r--r--drivers/i2c/busses/i2c-isa.c72
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 00000000000..0f54a2a0afa
--- /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);