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GMT G762/763 fan speed PWM controller is connected directly to a fan and performs closed-loop or open-loop control of the fan speed. Two modes - PWM or DC - are supported by the chip. Introduced driver provides various knobs to control the operations of the chip (via sysfs interface). Specific characteristics of the system can be passed either using board init code or via DT. Documentation for both the driver and DT bindings are also provided. Signed-off-by: Arnaud Ebalard <arno@natisbad.org> Tested-by: Simon Guinot <simon.guinot@sequanux.org> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
38 lines
1.3 KiB
C
38 lines
1.3 KiB
C
/*
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* Platform data structure for g762 fan controller driver
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*
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* Copyright (C) 2013, Arnaud EBALARD <arno@natisbad.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef __LINUX_PLATFORM_DATA_G762_H__
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#define __LINUX_PLATFORM_DATA_G762_H__
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/*
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* Following structure can be used to set g762 driver platform specific data
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* during board init. Note that passing a sparse structure is possible but
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* will result in non-specified attributes to be set to default value, hence
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* overloading those installed during boot (e.g. by u-boot).
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*/
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struct g762_platform_data {
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u32 fan_startv;
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u32 fan_gear_mode;
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u32 pwm_polarity;
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u32 clk_freq;
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};
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#endif /* __LINUX_PLATFORM_DATA_G762_H__ */
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