10 #include <zephyr/drivers/pwm.h>
20 /* 16-bit period cycles/prescaler in NPCX PWM modules */
24 /* PWM clock sources */
30 /* PWM heart-beat mode selection */
38 	/* pwm controller base address */
48 	/* PWM cycles per second */
52 /* PWM local functions */
58 	/* Disable PWM for module configuration first */  in pwm_npcx_configure()
61 	/* Set default PWM polarity to normal */  in pwm_npcx_configure()
64 	/* Turn off PWM heart-beat mode */  in pwm_npcx_configure()
68 	/* Select APB CLK/LFCLK clock sources to PWM module by default */  in pwm_npcx_configure()
80 /* PWM api functions */
85 	/* Single channel for each pwm device */  in pwm_npcx_set_cycles()
98 	/* Select PWM inverted polarity (ie. active-low pulse). */  in pwm_npcx_set_cycles()
105 	/* If pulse_cycles is 0, switch PWM off and return. */  in pwm_npcx_set_cycles()
113 	 * Calculate PWM prescaler that let period_cycles map to  in pwm_npcx_set_cycles()
114 	 * maximum pwm period cycles and won't exceed it.  in pwm_npcx_set_cycles()
122 	/* Set PWM prescaler. */  in pwm_npcx_set_cycles()
125 	/* Set PWM period cycles. */  in pwm_npcx_set_cycles()
128 	/* Set PWM pulse cycles. */  in pwm_npcx_set_cycles()
136 		/* Disable PWM before configuring. */  in pwm_npcx_set_cycles()
143 		/* Enable PWM now. */  in pwm_npcx_set_cycles()
157 	/* Single channel for each pwm device */  in pwm_npcx_get_cycles_per_sec()
165 /* PWM driver registration */
166 static DEVICE_API(pwm, pwm_npcx_driver_api) = {
180 	 * NPCX PWM module mixes byte and word registers together. Make sure  in pwm_npcx_init()
196 		LOG_ERR("Turn on PWM clock fail %d", ret);  in pwm_npcx_init()
203 		LOG_ERR("Get PWM clock rate error %d", ret);  in pwm_npcx_init()
207 	/* Configure PWM device initially */  in pwm_npcx_init()
210 	/* Configure pin-mux for PWM device */  in pwm_npcx_init()
213 		LOG_ERR("PWM pinctrl setup failed (%d)", ret);  in pwm_npcx_init()