2019-05-27 14:55:01 +08:00
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/* SPDX-License-Identifier: GPL-2.0-or-later */
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lib: add support for stmp-style devices
MX23/28 use IP cores which follow a register layout I have first seen on
STMP3xxx SoCs. In this layout, every register actually has four u32:
1.) to store a value directly
2.) a SET register where every 1-bit sets the corresponding bit,
others are unaffected
3.) same with a CLR register
4.) same with a TOG (toggle) register
Also, the 2 MSBs in register 0 are always the same and can be used to reset
the IP core.
All this is strictly speaking not mach-specific (but IP core specific) and,
thus, doesn't need to be in mach-mxs/include. At least mx6 also uses IP cores
following this stmp-style. So:
Introduce a stmp-style device, put the code and defines for that in a public
place (lib/), and let drivers for stmp-style devices select that code.
To avoid regressions and ease reviewing, the actual code is simply copied from
mach-mxs. It definately wants updates, but those need a seperate patch series.
Voila, mach dependency gone, reusable code introduced. Note that I didn't
remove the duplicated code from mach-mxs yet, first the drivers have to be
converted.
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Acked-by: Dong Aisheng <dong.aisheng@linaro.org>
2011-09-01 02:35:40 +08:00
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/*
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* basic functions for devices following the "stmp" style register layout
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*
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* Copyright (C) 2011 Wolfram Sang, Pengutronix e.K.
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*/
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#ifndef __STMP_DEVICE_H__
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#define __STMP_DEVICE_H__
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#define STMP_OFFSET_REG_SET 0x4
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#define STMP_OFFSET_REG_CLR 0x8
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#define STMP_OFFSET_REG_TOG 0xc
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extern int stmp_reset_block(void __iomem *);
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#endif /* __STMP_DEVICE_H__ */
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