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hwmon: add Maxim MAX197 support

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The MAX197 is an A/D converter, made by Maxim. This driver currently
supports the MAX197, and MAX199. They are both 8-Channel, Multi-Range,
5V, 12-Bit DAS with 8+4 Bus Interface and Fault Protection.

The available ranges for the MAX197 are {0,-5V} to 5V, and {0,-10V} to
10V, while they are {0,-2V} to 2V, and {0,-4V} to 4V on the MAX199.

Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Vivien Didelot 2012-08-30 21:42:57 -04:00 • committed by Guenter Roeck
parent 37f9648b27
commit 6c1fe725fd
5 changed files with 440 additions and 0 deletions
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21
include/linux/platform_data/max197.h Normal file
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/*
* Maxim MAX197 A/D Converter Driver
*
* Copyright (c) 2012 Savoir-faire Linux Inc.
* Vivien Didelot <vivien.didelot@savoirfairelinux.com>
*
* 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.
*
* For further information, see the Documentation/hwmon/max197 file.
*/
/**
* struct max197_platform_data - MAX197 connectivity info
* @convert: Function used to start a conversion with control byte ctrl.
* It must return the raw data, or a negative error code.
*/
struct max197_platform_data {
int (*convert)(u8 ctrl);
};