text: /*
   * Copyright (c) 2017, NXP
   *
   * SPDX-License-Identifier: Apache-2.0
   */
  
  #define DT_DRV_COMPAT nxp_kinetis_sim
  #include <errno.h>
  #include <soc.h>
  #include <drivers/clock_control.h>
  #include <dt-bindings/clock/kinetis_sim.h>
  #include <fsl_clock.h>
  
  #define LOG_LEVEL CONFIG_CLOCK_CONTROL_LOG_LEVEL
  #include <logging/log.h>
  LOG_MODULE_REGISTER(clock_control);
  
  static int mcux_sim_on(const struct device *dev,
  		       clock_control_subsys_t sub_system)
  {
  	clock_ip_name_t clock_ip_name = (clock_ip_name_t) sub_system;
  
  	CLOCK_EnableClock(clock_ip_name);
  
  	return 0;
  }
  
  static int mcux_sim_off(const struct device *dev,
  			clock_control_subsys_t sub_system)
  {
  	clock_ip_name_t clock_ip_name = (clock_ip_name_t) sub_system;
  
  	CLOCK_DisableClock(clock_ip_name);
  
  	return 0;
  }
  
  static int mcux_sim_get_subsys_rate(const struct device *dev,
  				    clock_control_subsys_t sub_system,
  				    uint32_t *rate)
  {
  	clock_name_t clock_name;
  
  	switch ((uint32_t) sub_system) {
  	case KINETIS_SIM_LPO_CLK:
  		clock_name = kCLOCK_LpoClk;
  		break;
  	default:
  		clock_name = (clock_name_t) sub_system;
  		break;
  	}
  
  	*rate = CLOCK_GetFreq(clock_name);
  
  	return 0;
  }
  
  #if DT_NODE_HAS_STATUS(DT_INST(0, nxp_kinetis_ke1xf_sim), okay)
  #define NXP_KINETIS_SIM_LABEL DT_LABEL(DT_INST(0, nxp_kinetis_ke1xf_sim))
  #if DT_NODE_HAS_PROP(DT_INST(0, nxp_kinetis_ke1xf_sim), clkout_source)
  	#define NXP_KINETIS_SIM_CLKOUT_SOURCE \
  			DT_PROP(DT_INST(0, nxp_kinetis_ke1xf_sim), clkout_source)
  #endif
  #if DT_NODE_HAS_PROP(DT_INST(0, nxp_kinetis_ke1xf_sim), clkout_divider)
  	#define NXP_KINETIS_SIM_CLKOUT_DIVIDER \
  			DT_PROP(DT_INST(0, nxp_kinetis_ke1xf_sim), clkout_divider)
  #endif
  #else
  #define NXP_KINETIS_SIM_LABEL DT_LABEL(DT_INST(0, nxp_kinetis_sim))
  #if DT_NODE_HAS_PROP(DT_INST(0, nxp_kinetis_sim), clkout_source)
  	#define NXP_KINETIS_SIM_CLKOUT_SOURCE \
  		DT_PROP(DT_INST(0, nxp_kinetis_sim), clkout_source)
  #endif
  #if DT_NODE_HAS_PROP(DT_INST(0, nxp_kinetis_sim), clkout_divider)
  	#define NXP_KINETIS_SIM_CLKOUT_DIVIDER \
  		DT_PROP(DT_INST(0, nxp_kinetis_sim), clkout_divider)
  #endif
  #endif
  
  static int mcux_sim_init(const struct device *dev)
  {
  #ifdef NXP_KINETIS_SIM_CLKOUT_DIVIDER
  	SIM->CHIPCTL = (SIM->CHIPCTL & ~SIM_CHIPCTL_CLKOUTDIV_MASK)
  		| SIM_CHIPCTL_CLKOUTDIV(NXP_KINETIS_SIM_CLKOUT_DIVIDER);
  #endif
  #ifdef NXP_KINETIS_SIM_CLKOUT_SOURCE
  	SIM->CHIPCTL = (SIM->CHIPCTL & ~SIM_CHIPCTL_CLKOUTSEL_MASK)
  		| SIM_CHIPCTL_CLKOUTSEL(NXP_KINETIS_SIM_CLKOUT_SOURCE);
  #endif
  
  	return 0;
  }
  
  static const struct clock_control_driver_api mcux_sim_driver_api = {
  	.on = mcux_sim_on,
  	.off = mcux_sim_off,
  	.get_rate = mcux_sim_get_subsys_rate,
  };
  
  DEVICE_AND_API_INIT(mcux_sim, NXP_KINETIS_SIM_LABEL,
  		    &mcux_sim_init,
  		    NULL, NULL,
  		    PRE_KERNEL_1, CONFIG_KERNEL_INIT_PRIORITY_DEVICE,
  		    &mcux_sim_driver_api);
  