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