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gpio: add TS-5500 DIO blocks support

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Technologic Systems TS-5500 provides digital I/O lines exposed through
pin blocks. On this platform, there are three of them, named DIO1, DIO2
and LCD port, that may be used as a DIO block.

The TS-5500 pin blocks are described in the product's wiki:
http://wiki.embeddedarm.com/wiki/TS-5500#Digital_I.2FO

This driver is not limited to the TS-5500 blocks. It can be extended to
support similar boards pin blocks, such as on the TS-5600.

This patch is the V2 of the previous https://lkml.org/lkml/2012/9/25/671
with corrections suggested by Linus Walleij.

Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: Jerome Oufella <jerome.oufella@savoirfairelinux.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Vivien Didelot
2012-12-07 21:36:34 -05:00
committed by Linus Walleij
parent 805f864ebe
commit 759f5f3752
4 changed files with 502 additions and 0 deletions
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27
include/linux/platform_data/gpio-ts5500.h Normal file
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/*
* GPIO (DIO) header for Technologic Systems TS-5500
*
* 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.
*/
#ifndef _PDATA_GPIO_TS5500_H
#define _PDATA_GPIO_TS5500_H
/**
* struct ts5500_dio_platform_data - TS-5500 pin block configuration
* @base: The GPIO base number to use.
* @strap: The only pin connected to an interrupt in a block is input-only.
* If you need a bidirectional line which can trigger an IRQ, you
* may strap it with an in/out pin. This flag indicates this case.
*/
struct ts5500_dio_platform_data {
int base;
bool strap;
};
#endif /* _PDATA_GPIO_TS5500_H */