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![Neil Armstrong](/assets/img/avatar_default.png)
Adds support for using a OMAP dual-mode timer with PWM capability as a Linux PWM device. The driver controls the timer by using the dmtimer API. Add a platform_data structure for each pwm-omap-dmtimer nodes containing the dmtimers functions in order to get driver not rely on platform specific functions. Cc: Grant Erickson <marathon96@gmail.com> Cc: NeilBrown <neilb@suse.de> Cc: Joachim Eastwood <manabian@gmail.com> Suggested-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Neil Armstrong <narmstrong@baylibre.com> Acked-by: Tony Lindgren <tony@atomide.com> [thierry.reding@gmail.com: coding style bikeshed, fix timer leak] Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
69 lines
2.5 KiB
C
69 lines
2.5 KiB
C
/*
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* include/linux/platform_data/pwm_omap_dmtimer.h
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*
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* OMAP Dual-Mode Timer PWM platform data
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*
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* Copyright (C) 2010 Texas Instruments Incorporated - http://www.ti.com/
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* Tarun Kanti DebBarma <tarun.kanti@ti.com>
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* Thara Gopinath <thara@ti.com>
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*
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* Platform device conversion and hwmod support.
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*
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* Copyright (C) 2005 Nokia Corporation
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* Author: Lauri Leukkunen <lauri.leukkunen@nokia.com>
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* PWM and clock framework support by Timo Teras.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
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* NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#ifndef __PWM_OMAP_DMTIMER_PDATA_H
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#define __PWM_OMAP_DMTIMER_PDATA_H
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/* trigger types */
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#define PWM_OMAP_DMTIMER_TRIGGER_NONE 0x00
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#define PWM_OMAP_DMTIMER_TRIGGER_OVERFLOW 0x01
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#define PWM_OMAP_DMTIMER_TRIGGER_OVERFLOW_AND_COMPARE 0x02
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struct omap_dm_timer;
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typedef struct omap_dm_timer pwm_omap_dmtimer;
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struct pwm_omap_dmtimer_pdata {
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pwm_omap_dmtimer *(*request_by_node)(struct device_node *np);
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int (*free)(pwm_omap_dmtimer *timer);
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void (*enable)(pwm_omap_dmtimer *timer);
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void (*disable)(pwm_omap_dmtimer *timer);
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struct clk *(*get_fclk)(pwm_omap_dmtimer *timer);
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int (*start)(pwm_omap_dmtimer *timer);
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int (*stop)(pwm_omap_dmtimer *timer);
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int (*set_load)(pwm_omap_dmtimer *timer, int autoreload,
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unsigned int value);
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int (*set_match)(pwm_omap_dmtimer *timer, int enable,
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unsigned int match);
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int (*set_pwm)(pwm_omap_dmtimer *timer, int def_on,
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int toggle, int trigger);
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int (*set_prescaler)(pwm_omap_dmtimer *timer, int prescaler);
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int (*write_counter)(pwm_omap_dmtimer *timer, unsigned int value);
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};
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#endif /* __PWM_OMAP_DMTIMER_PDATA_H */
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