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/*
* Copyright (c) 2011 The Chromium OS Authors.
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#ifndef __ASM_ARCH_TEGRA_PWFM_H
#define __ASM_ARCH_TEGRA_PWFM_H
/* Tegra pulse width frequency modulator definitions */
/* This is a single PWFM channel */
struct pwfm_ctlr {
uint control; /* Control register */
};
/* PWM_CONTROLLER_PWM_CSR_0/1/2/3_0 */
#define PWFM_ENABLE_RANGE 31:31
#define PWFM_WIDTH_RANGE 30:16
#define PWFM_DIVIDER_RANGE 12:0
/**
* Program the PWFM with the given parameters.
*
* @param enable 1 to enable, 0 to disable
* @param pulse_width high pulse width: 0=always low, 1=1/256 pulse high,
* n = n/256 pulse high
* @param freq_divider frequency divider value
*/
void pwfm_setup(struct pwfm_ctlr *pwfm, int enable, int pulse_width,
int freq_divider);
#endif /* __ASM_ARCH_TEGRA_PWFM_H */
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