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author | David S. Miller <davem@davemloft.net> | 2010-03-15 23:23:54 (GMT) |
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committer | David S. Miller <davem@davemloft.net> | 2010-03-15 23:23:54 (GMT) |
commit | 4961e02f1999e1c3468c09b2669c94d7c3ae82a8 (patch) | |
tree | 44c15abb09d7ba5e17a9aba95ee246648b1c1a8a /drivers/gpio/max7300.c | |
parent | d14a0ebda7d3daede1a99c01527affb9ceaa4c22 (diff) | |
parent | a3d3203e4bb40f253b1541e310dc0f9305be7c84 (diff) | |
download | linux-fsl-qoriq-4961e02f1999e1c3468c09b2669c94d7c3ae82a8.tar.xz |
Merge branch 'master' of /home/davem/src/GIT/linux-2.6/
Diffstat (limited to 'drivers/gpio/max7300.c')
-rw-r--r-- | drivers/gpio/max7300.c | 94 |
1 files changed, 94 insertions, 0 deletions
diff --git a/drivers/gpio/max7300.c b/drivers/gpio/max7300.c new file mode 100644 index 0000000..9d74eef --- /dev/null +++ b/drivers/gpio/max7300.c @@ -0,0 +1,94 @@ +/* + * drivers/gpio/max7300.c + * + * Copyright (C) 2009 Wolfram Sang, Pengutronix + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * Check max730x.c for further details. + */ + +#include <linux/module.h> +#include <linux/init.h> +#include <linux/platform_device.h> +#include <linux/mutex.h> +#include <linux/i2c.h> +#include <linux/spi/max7301.h> + +static int max7300_i2c_write(struct device *dev, unsigned int reg, + unsigned int val) +{ + struct i2c_client *client = to_i2c_client(dev); + + return i2c_smbus_write_byte_data(client, reg, val); +} + +static int max7300_i2c_read(struct device *dev, unsigned int reg) +{ + struct i2c_client *client = to_i2c_client(dev); + + return i2c_smbus_read_byte_data(client, reg); +} + +static int __devinit max7300_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct max7301 *ts; + int ret; + + if (!i2c_check_functionality(client->adapter, + I2C_FUNC_SMBUS_BYTE_DATA)) + return -EIO; + + ts = kzalloc(sizeof(struct max7301), GFP_KERNEL); + if (!ts) + return -ENOMEM; + + ts->read = max7300_i2c_read; + ts->write = max7300_i2c_write; + ts->dev = &client->dev; + + ret = __max730x_probe(ts); + if (ret) + kfree(ts); + return ret; +} + +static int __devexit max7300_remove(struct i2c_client *client) +{ + return __max730x_remove(&client->dev); +} + +static const struct i2c_device_id max7300_id[] = { + { "max7300", 0 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, max7300_id); + +static struct i2c_driver max7300_driver = { + .driver = { + .name = "max7300", + .owner = THIS_MODULE, + }, + .probe = max7300_probe, + .remove = __devexit_p(max7300_remove), + .id_table = max7300_id, +}; + +static int __init max7300_init(void) +{ + return i2c_add_driver(&max7300_driver); +} +subsys_initcall(max7300_init); + +static void __exit max7300_exit(void) +{ + i2c_del_driver(&max7300_driver); +} +module_exit(max7300_exit); + +MODULE_AUTHOR("Wolfram Sang"); +MODULE_LICENSE("GPL v2"); +MODULE_DESCRIPTION("MAX7300 GPIO-Expander"); |