53 lines
1.0 KiB
C
53 lines
1.0 KiB
C
/*
|
|
* Copyright (c) 2018, Diego Sueiro
|
|
*
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*/
|
|
|
|
#include <ccm_imx7d.h>
|
|
#include <ccm_analog_imx7d.h>
|
|
#include "soc_clk_freq.h"
|
|
|
|
#ifdef CONFIG_PWM_IMX
|
|
u32_t get_pwm_clock_freq(PWM_Type *base)
|
|
{
|
|
u32_t root;
|
|
u32_t hz;
|
|
u32_t pre, post;
|
|
|
|
switch ((u32_t)base) {
|
|
case PWM1_BASE:
|
|
root = CCM_GetRootMux(CCM, ccmRootPwm1);
|
|
CCM_GetRootDivider(CCM, ccmRootPwm1, &pre, &post);
|
|
break;
|
|
case PWM2_BASE:
|
|
root = CCM_GetRootMux(CCM, ccmRootPwm2);
|
|
CCM_GetRootDivider(CCM, ccmRootPwm2, &pre, &post);
|
|
break;
|
|
case PWM3_BASE:
|
|
root = CCM_GetRootMux(CCM, ccmRootPwm3);
|
|
CCM_GetRootDivider(CCM, ccmRootPwm3, &pre, &post);
|
|
break;
|
|
case PWM4_BASE:
|
|
root = CCM_GetRootMux(CCM, ccmRootPwm4);
|
|
CCM_GetRootDivider(CCM, ccmRootPwm4, &pre, &post);
|
|
break;
|
|
default:
|
|
return 0;
|
|
}
|
|
|
|
switch (root) {
|
|
case ccmRootmuxPwmOsc24m:
|
|
hz = 24000000;
|
|
break;
|
|
case ccmRootmuxPwmSysPllDiv4:
|
|
hz = CCM_ANALOG_GetSysPllFreq(CCM_ANALOG) >> 2;
|
|
break;
|
|
default:
|
|
return 0;
|
|
}
|
|
|
|
return hz / (pre + 1) / (post + 1);
|
|
}
|
|
#endif /* CONFIG_PWM_IMX */
|