linux/mfd/janz.h

0001 /* SPDX-License-Identifier: GPL-2.0-or-later */
0002 /*
0003  * Common Definitions for Janz MODULbus devices
0004  *
0005  * Copyright (c) 2010 Ira W. Snyder <iws@ovro.caltech.edu>
0006  */
0007
0008 #ifndef JANZ_H
0009 #define JANZ_H
0010
0011 struct janz_platform_data {
0012     /* MODULbus Module Number */
0013     unsigned int modno;
0014 };
0015
0016 /* PLX bridge chip onboard registers */
0017 struct janz_cmodio_onboard_regs {
0018     u8 unused1;
0019
0020     /*
0021      * Read access: interrupt status
0022      * Write access: interrupt disable
0023      */
0024     u8 int_disable;
0025     u8 unused2;
0026
0027     /*
0028      * Read access: MODULbus number (hex switch)
0029      * Write access: interrupt enable
0030      */
0031     u8 int_enable;
0032     u8 unused3;
0033
0034     /* write-only */
0035     u8 reset_assert;
0036     u8 unused4;
0037
0038     /* write-only */
0039     u8 reset_deassert;
0040     u8 unused5;
0041
0042     /* read-write access to serial EEPROM */
0043     u8 eep;
0044     u8 unused6;
0045
0046     /* write-only access to EEPROM chip select */
0047     u8 enid;
0048 };
0049
0050 #endif /* JANZ_H */