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f5ac658d16
The clkctrl functions were becoming a mess. Normalise the names, get rid of the xtal derived as special case and use the same interface. Change-Id: Ib954a8d30a6bd691914b5e0d97774ec9fc560c50
60 lines
2.2 KiB
C
60 lines
2.2 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2011 by Amaury Pouly
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#include "pwm-imx233.h"
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#include "clkctrl-imx233.h"
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#include "pinctrl-imx233.h"
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void imx233_pwm_init(void)
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{
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imx233_reset_block(&HW_PWM_CTRL);
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imx233_clkctrl_enable(CLK_PWM, true);
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}
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bool imx233_pwm_is_channel_enable(int channel)
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{
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return BF_RD(PWM_CTRL, PWMx_ENABLE(channel));
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}
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void imx233_pwm_enable_channel(int channel, bool enable)
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{
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if(enable)
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BF_SET(PWM_CTRL, PWMx_ENABLE(channel));
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else
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BF_CLR(PWM_CTRL, PWMx_ENABLE(channel));
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}
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void imx233_pwm_setup_channel(int channel, int period, int cdiv, int active,
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int active_state, int inactive, int inactive_state)
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{
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/* stop */
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bool enable = imx233_pwm_is_channel_enable(channel);
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if(enable)
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imx233_pwm_enable_channel(channel, false);
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/* setup pin */
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imx233_pinctrl_setup_vpin(VPIN_PWM(channel), "pwm", PINCTRL_DRIVE_4mA, false);
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/* watch the order ! active THEN period
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* NOTE: the register value is period-1 */
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HW_PWM_ACTIVEn(channel) = BF_OR2(PWM_ACTIVEn, ACTIVE(active), INACTIVE(inactive));
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HW_PWM_PERIODn(channel) = BF_OR4(PWM_PERIODn, PERIOD(period - 1),
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ACTIVE_STATE(active_state), INACTIVE_STATE(inactive_state), CDIV(cdiv));
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/* restore */
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imx233_pwm_enable_channel(channel, enable);
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}
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