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83d290c56f
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
71 lines
1.3 KiB
C
71 lines
1.3 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* (C) Copyright 2014
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* Heiko Schocher, DENX Software Engineering, hs@denx.de.
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*
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* Basic support for the pwm module on imx6.
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*/
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#include <common.h>
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#include <div64.h>
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#include <pwm.h>
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#include <asm/arch/imx-regs.h>
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#include <asm/io.h>
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#include "pwm-imx-util.h"
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int pwm_init(int pwm_id, int div, int invert)
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{
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struct pwm_regs *pwm = (struct pwm_regs *)pwm_id_to_reg(pwm_id);
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if (!pwm)
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return -1;
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writel(0, &pwm->ir);
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return 0;
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}
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int pwm_config(int pwm_id, int duty_ns, int period_ns)
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{
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struct pwm_regs *pwm = (struct pwm_regs *)pwm_id_to_reg(pwm_id);
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unsigned long period_cycles, duty_cycles, prescale;
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u32 cr;
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if (!pwm)
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return -1;
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pwm_imx_get_parms(period_ns, duty_ns, &period_cycles, &duty_cycles,
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&prescale);
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cr = PWMCR_PRESCALER(prescale) |
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PWMCR_DOZEEN | PWMCR_WAITEN |
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PWMCR_DBGEN | PWMCR_CLKSRC_IPG_HIGH;
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writel(cr, &pwm->cr);
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/* set duty cycles */
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writel(duty_cycles, &pwm->sar);
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/* set period cycles */
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writel(period_cycles, &pwm->pr);
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return 0;
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}
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int pwm_enable(int pwm_id)
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{
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struct pwm_regs *pwm = (struct pwm_regs *)pwm_id_to_reg(pwm_id);
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if (!pwm)
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return -1;
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setbits_le32(&pwm->cr, PWMCR_EN);
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return 0;
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}
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void pwm_disable(int pwm_id)
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{
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struct pwm_regs *pwm = (struct pwm_regs *)pwm_id_to_reg(pwm_id);
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if (!pwm)
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return;
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clrbits_le32(&pwm->cr, PWMCR_EN);
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}
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