On Mon, Dec 16, 2013 at 4:48 PM, Lee Jones <[email protected]> wrote: > There isn't any documentation that would help you I fear. I'm trying > to help you, but you haven't answered my previous question.
I did intend to answer your question when I was writing that I would send some code. See it at the bottom of the email. > Do you have a datasheet for the device that you're trying to enable? datasheets.maximintegrated.com/en/ds/MAX6650-MAX6651.pdf hwmon is already available in the kernel (for which my simple patch was rejected). I have just sent out a gpio driver for the gpio bits, and see the mfd driver code below. /* * Device access for MAX6651 * * Copyright(c) 2013 Polatis Ltd. * * Author: Laszlo Papp <[email protected]> * * 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. */ #include <linux/device.h> #include <linux/delay.h> #include <linux/input.h> #include <linux/interrupt.h> #include <linux/mfd/core.h> #include <linux/slab.h> #include <linux/module.h> #include <linux/i2c.h> #include <linux/mfd/max6651.h> static struct mfd_cell max6651_devs[] = { { .name = "max6651-gpio", }, { .name = "max6650", }, }; static int max6651_i2c_probe(struct i2c_client *i2c, const struct i2c_device_id *id) { struct max6651_dev *max6651; int ret = 0; max6651 = kzalloc(sizeof(struct max6651_dev), GFP_KERNEL); if (max6651 == NULL) return -ENOMEM; i2c_set_clientdata(i2c, max6651); max6651->dev = &i2c->dev; mutex_init(&max6651->iolock); ret = mfd_add_devices(max6651->dev, -1, max6651_devs, ARRAY_SIZE(max6651_devs), NULL, 0); if (ret < 0) { dev_err(max6651->dev, "cannot add mfd cells\n"); goto err_mfd; } return ret; err_mfd: mfd_remove_devices(max6651->dev); err: kfree(max6651); return ret; } static int max6651_i2c_remove(struct i2c_client *i2c) { struct max6651_dev *max6651 = i2c_get_clientdata(i2c); mfd_remove_devices(max6651->dev); return 0; } static const struct i2c_device_id max6651_i2c_id[] = { { "max6650", TYPE_MAX6650 }, { "max6651", TYPE_MAX6651 }, { } }; MODULE_DEVICE_TABLE(i2c, max6651_i2c_id); static struct i2c_driver max6651_i2c_driver = { .driver = { .name = "max6651", .owner = THIS_MODULE, }, .probe = max6651_i2c_probe, .remove = max6651_i2c_remove, .id_table = max6651_i2c_id, }; static int __init max6651_i2c_init(void) { return i2c_add_driver(&max6651_i2c_driver); } /* init early so consumer devices can complete system boot */ subsys_initcall(max6651_i2c_init); static void __exit max6651_i2c_exit(void) { i2c_del_driver(&max6651_i2c_driver); } module_exit(max6651_i2c_exit); MODULE_AUTHOR("Laszlo Papp <[email protected]>"); MODULE_DESCRIPTION("MAX6651 MFD"); MODULE_LICENSE("GPL"); -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
