8  * Links to reference manuals for the supported PWM chips can be found in
29 #include <linux/pwm.h>
32 /* The following is global registers for PWM controller */
40 /* The following register is PWM channel related registers */
50 /* The following registers for PWM v1 */
55 /* The following registers for PWM v2 */
87 	 * pending we delay disabling the PWM until the new configuration is
227 static void atmel_pwm_update_cdty(struct pwm_chip *chip, struct pwm_device *pwm,  in atmel_pwm_update_cdty()  argument
235 		val = atmel_pwm_ch_readl(atmel_pwm, pwm->hwpwm, PWM_CMR);  in atmel_pwm_update_cdty()
237 		atmel_pwm_ch_writel(atmel_pwm, pwm->hwpwm, PWM_CMR, val);  in atmel_pwm_update_cdty()
240 	atmel_pwm_ch_writel(atmel_pwm, pwm->hwpwm,  in atmel_pwm_update_cdty()
242 	atmel_pwm_set_pending(atmel_pwm, pwm->hwpwm);  in atmel_pwm_update_cdty()
246 				    struct pwm_device *pwm,  in atmel_pwm_set_cprd_cdty()  argument
251 	atmel_pwm_ch_writel(atmel_pwm, pwm->hwpwm,  in atmel_pwm_set_cprd_cdty()
253 	atmel_pwm_ch_writel(atmel_pwm, pwm->hwpwm,  in atmel_pwm_set_cprd_cdty()
257 static void atmel_pwm_disable(struct pwm_chip *chip, struct pwm_device *pwm,  in atmel_pwm_disable()  argument
263 	atmel_pwm_wait_nonpending(atmel_pwm, pwm->hwpwm);  in atmel_pwm_disable()
265 	atmel_pwm_writel(atmel_pwm, PWM_DIS, 1 << pwm->hwpwm);  in atmel_pwm_disable()
268 	 * Wait for the PWM channel disable operation to be effective before  in atmel_pwm_disable()
273 	while ((atmel_pwm_readl(atmel_pwm, PWM_SR) & (1 << pwm->hwpwm)) &&  in atmel_pwm_disable()
281 static int atmel_pwm_apply(struct pwm_chip *chip, struct pwm_device *pwm,  in atmel_pwm_apply()  argument
292 		if (pwm->state.enabled &&  in atmel_pwm_apply()
293 		    pwm->state.polarity == state->polarity &&  in atmel_pwm_apply()
294 		    pwm->state.period == state->period) {  in atmel_pwm_apply()
295 			u32 cmr = atmel_pwm_ch_readl(atmel_pwm, pwm->hwpwm, PWM_CMR);  in atmel_pwm_apply()
297 			cprd = atmel_pwm_ch_readl(atmel_pwm, pwm->hwpwm,  in atmel_pwm_apply()
302 			atmel_pwm_update_cdty(chip, pwm, cdty);  in atmel_pwm_apply()
316 		if (pwm->state.enabled) {  in atmel_pwm_apply()
317 			atmel_pwm_disable(chip, pwm, false);  in atmel_pwm_apply()
327 		val = atmel_pwm_ch_readl(atmel_pwm, pwm->hwpwm, PWM_CMR);  in atmel_pwm_apply()
333 		atmel_pwm_ch_writel(atmel_pwm, pwm->hwpwm, PWM_CMR, val);  in atmel_pwm_apply()
334 		atmel_pwm_set_cprd_cdty(chip, pwm, cprd, cdty);  in atmel_pwm_apply()
335 		atmel_pwm_writel(atmel_pwm, PWM_ENA, 1 << pwm->hwpwm);  in atmel_pwm_apply()
336 	} else if (pwm->state.enabled) {  in atmel_pwm_apply()
337 		atmel_pwm_disable(chip, pwm, true);  in atmel_pwm_apply()
343 static int atmel_pwm_get_state(struct pwm_chip *chip, struct pwm_device *pwm,  in atmel_pwm_get_state()  argument
350 	cmr = atmel_pwm_ch_readl(atmel_pwm, pwm->hwpwm, PWM_CMR);  in atmel_pwm_get_state()
352 	if (sr & (1 << pwm->hwpwm)) {  in atmel_pwm_get_state()
359 		cprd = atmel_pwm_ch_readl(atmel_pwm, pwm->hwpwm,  in atmel_pwm_get_state()
366 		atmel_pwm_wait_nonpending(atmel_pwm, pwm->hwpwm);  in atmel_pwm_get_state()
368 		cdty = atmel_pwm_ch_readl(atmel_pwm, pwm->hwpwm,  in atmel_pwm_get_state()
433 		.compatible = "atmel,at91sam9rl-pwm",
436 		.compatible = "atmel,sama5d3-pwm",
439 		.compatible = "atmel,sama5d2-pwm",
442 		.compatible = "microchip,sam9x60-pwm",
470 				"failed to enable clock for pwm %pe\n",  in atmel_pwm_enable_clk_if_on()
509 				     "failed to get prepared PWM clock\n");  in atmel_pwm_probe()
519 		dev_err_probe(&pdev->dev, ret, "failed to add PWM chip\n");  in atmel_pwm_probe()
533 		.name = "atmel-pwm",
540 MODULE_ALIAS("platform:atmel-pwm");
542 MODULE_DESCRIPTION("Atmel PWM driver");