drivers/pwm/pwm-atmel.c

29 #include <linux/pwm.h>
238 static void atmel_pwm_update_cdty(struct pwm_chip *chip, struct pwm_device *pwm,
246 		val = atmel_pwm_ch_readl(atmel_pwm, pwm->hwpwm, PWM_CMR);
248 		atmel_pwm_ch_writel(atmel_pwm, pwm->hwpwm, PWM_CMR, val);
251 	atmel_pwm_ch_writel(atmel_pwm, pwm->hwpwm,
253 	atmel_pwm_set_pending(atmel_pwm, pwm->hwpwm);
257 				    struct pwm_device *pwm,
262 	atmel_pwm_ch_writel(atmel_pwm, pwm->hwpwm,
264 	atmel_pwm_ch_writel(atmel_pwm, pwm->hwpwm,
268 static void atmel_pwm_disable(struct pwm_chip *chip, struct pwm_device *pwm,
274 	atmel_pwm_wait_nonpending(atmel_pwm, pwm->hwpwm);
276 	atmel_pwm_writel(atmel_pwm, PWM_DIS, 1 << pwm->hwpwm);
284 	while ((atmel_pwm_readl(atmel_pwm, PWM_SR) & (1 << pwm->hwpwm)) &&
292 static int atmel_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm,
303 		if (pwm->state.enabled &&
304 		    pwm->state.polarity == state->polarity &&
305 		    pwm->state.period == state->period) {
306 			u32 cmr = atmel_pwm_ch_readl(atmel_pwm, pwm->hwpwm, PWM_CMR);
308 			cprd = atmel_pwm_ch_readl(atmel_pwm, pwm->hwpwm,
313 			atmel_pwm_update_cdty(chip, pwm, cdty);
327 		if (pwm->state.enabled) {
328 			atmel_pwm_disable(chip, pwm, false);
338 		val = atmel_pwm_ch_readl(atmel_pwm, pwm->hwpwm, PWM_CMR);
344 		atmel_pwm_ch_writel(atmel_pwm, pwm->hwpwm, PWM_CMR, val);
345 		atmel_pwm_set_cprd_cdty(chip, pwm, cprd, cdty);
346 		atmel_pwm_writel(atmel_pwm, PWM_ENA, 1 << pwm->hwpwm);
347 	} else if (pwm->state.enabled) {
348 		atmel_pwm_disable(chip, pwm, true);
354 static int atmel_pwm_get_state(struct pwm_chip *chip, struct pwm_device *pwm,
361 	cmr = atmel_pwm_ch_readl(atmel_pwm, pwm->hwpwm, PWM_CMR);
363 	if (sr & (1 << pwm->hwpwm)) {
370 		cprd = atmel_pwm_ch_readl(atmel_pwm, pwm->hwpwm,
377 		atmel_pwm_wait_nonpending(atmel_pwm, pwm->hwpwm);
379 		cdty = atmel_pwm_ch_readl(atmel_pwm, pwm->hwpwm,
444 		.compatible = "atmel,at91sam9rl-pwm",
447 		.compatible = "atmel,sama5d3-pwm",
450 		.compatible = "atmel,sama5d2-pwm",
453 		.compatible = "microchip,sam9x60-pwm",
481 				"failed to enable clock for pwm %pe\n",
545 		.name = "atmel-pwm",
552 MODULE_ALIAS("platform:atmel-pwm");