12  *   This file is the core OMAP support for the generic, Linux
13  *   PWM driver / controller, using the OMAP's dual-mode timers
29  * - PWM OMAP DM timer cannot change the polarity when pwm is active. When
43 #include <linux/platform_data/dmtimer-omap.h>
55  *				  corresponding to omap dmtimer.
56  * @dm_timer:		Pointer to omap dm timer.
57  * @pdata:		Pointer to omap dm timer ops.
58  * @dm_timer_pdev:	Pointer to omap dm timer platform device
86  * pwm_omap_dmtimer_start() - Start the pwm omap dm timer in pwm mode
87  * @omap:	Pointer to pwm omap dm timer chip
89 static void pwm_omap_dmtimer_start(struct pwm_omap_dmtimer_chip *omap)  in pwm_omap_dmtimer_start()  argument
92 	 * According to OMAP 4 TRM section 22.2.4.10 the counter should be  in pwm_omap_dmtimer_start()
99 	omap->pdata->enable(omap->dm_timer);  in pwm_omap_dmtimer_start()
100 	omap->pdata->write_counter(omap->dm_timer, DM_TIMER_LOAD_MIN);  in pwm_omap_dmtimer_start()
101 	omap->pdata->disable(omap->dm_timer);  in pwm_omap_dmtimer_start()
103 	omap->pdata->start(omap->dm_timer);  in pwm_omap_dmtimer_start()
108  * @omap:	Pointer to pwm omap dm timer chip
112 static bool pwm_omap_dmtimer_is_enabled(struct pwm_omap_dmtimer_chip *omap)  in pwm_omap_dmtimer_is_enabled()  argument
116 	status = omap->pdata->get_pwm_status(omap->dm_timer);  in pwm_omap_dmtimer_is_enabled()
123  * @omap:	Pointer to pwm omap dm timer chip
127 static int pwm_omap_dmtimer_polarity(struct pwm_omap_dmtimer_chip *omap)  in pwm_omap_dmtimer_polarity()  argument
131 	status = omap->pdata->get_pwm_status(omap->dm_timer);  in pwm_omap_dmtimer_polarity()
137  * pwm_omap_dmtimer_config() - Update the configuration of pwm omap dm timer
150 	struct pwm_omap_dmtimer_chip *omap = to_pwm_omap_dmtimer_chip(chip);  in pwm_omap_dmtimer_config()  local
163 	fclk = omap->pdata->get_fclk(omap->dm_timer);  in pwm_omap_dmtimer_config()
226 	omap->pdata->set_load(omap->dm_timer, load_value);  in pwm_omap_dmtimer_config()
227 	omap->pdata->set_match(omap->dm_timer, true, match_value);  in pwm_omap_dmtimer_config()
245 	struct pwm_omap_dmtimer_chip *omap = to_pwm_omap_dmtimer_chip(chip);  in pwm_omap_dmtimer_set_polarity()  local
249 	enabled = pwm_omap_dmtimer_is_enabled(omap);  in pwm_omap_dmtimer_set_polarity()
251 		omap->pdata->stop(omap->dm_timer);  in pwm_omap_dmtimer_set_polarity()
253 	omap->pdata->set_pwm(omap->dm_timer,  in pwm_omap_dmtimer_set_polarity()
259 		pwm_omap_dmtimer_start(omap);  in pwm_omap_dmtimer_set_polarity()
263  * pwm_omap_dmtimer_apply() - Changes the state of the pwm omap dm timer.
274 	struct pwm_omap_dmtimer_chip *omap = to_pwm_omap_dmtimer_chip(chip);  in pwm_omap_dmtimer_apply()  local
277 	if (pwm_omap_dmtimer_is_enabled(omap) && !state->enabled) {  in pwm_omap_dmtimer_apply()
278 		omap->pdata->stop(omap->dm_timer);  in pwm_omap_dmtimer_apply()
282 	if (pwm_omap_dmtimer_polarity(omap) != state->polarity)  in pwm_omap_dmtimer_apply()
290 	if (!pwm_omap_dmtimer_is_enabled(omap) && state->enabled) {  in pwm_omap_dmtimer_apply()
291 		omap->pdata->set_pwm(omap->dm_timer,  in pwm_omap_dmtimer_apply()
296 		pwm_omap_dmtimer_start(omap);  in pwm_omap_dmtimer_apply()
313 	struct pwm_omap_dmtimer_chip *omap;  in pwm_omap_dmtimer_probe()  local
370 	chip = devm_pwmchip_alloc(&pdev->dev, 1, sizeof(*omap));  in pwm_omap_dmtimer_probe()
375 	omap = to_pwm_omap_dmtimer_chip(chip);  in pwm_omap_dmtimer_probe()
377 	omap->pdata = pdata;  in pwm_omap_dmtimer_probe()
378 	omap->dm_timer = dm_timer;  in pwm_omap_dmtimer_probe()
379 	omap->dm_timer_pdev = timer_pdev;  in pwm_omap_dmtimer_probe()
385 	if (pm_runtime_active(&omap->dm_timer_pdev->dev))  in pwm_omap_dmtimer_probe()
386 		omap->pdata->stop(omap->dm_timer);  in pwm_omap_dmtimer_probe()
389 		omap->pdata->set_prescaler(omap->dm_timer, v);  in pwm_omap_dmtimer_probe()
393 		omap->pdata->set_source(omap->dm_timer, v);  in pwm_omap_dmtimer_probe()
412 	 * *omap is allocated using devm_kzalloc,  in pwm_omap_dmtimer_probe()
434 	struct pwm_omap_dmtimer_chip *omap = to_pwm_omap_dmtimer_chip(chip);  in pwm_omap_dmtimer_remove()  local
438 	if (pm_runtime_active(&omap->dm_timer_pdev->dev))  in pwm_omap_dmtimer_remove()
439 		omap->pdata->stop(omap->dm_timer);  in pwm_omap_dmtimer_remove()
441 	omap->pdata->free(omap->dm_timer);  in pwm_omap_dmtimer_remove()
443 	put_device(&omap->dm_timer_pdev->dev);  in pwm_omap_dmtimer_remove()
447 	{.compatible = "ti,omap-dmtimer-pwm"},
454 		.name = "omap-dmtimer-pwm",
466 MODULE_DESCRIPTION("OMAP PWM Driver using Dual-mode Timers");