15  *   This file is the core OMAP support for the generic, Linux
16  *   PWM driver / controller, using the OMAP's dual-mode timers.
26 #include <linux/platform_data/dmtimer-omap.h>
56 static void pwm_omap_dmtimer_start(struct pwm_omap_dmtimer_chip *omap)  in pwm_omap_dmtimer_start()  argument
59 	 * According to OMAP 4 TRM section 22.2.4.10 the counter should be  in pwm_omap_dmtimer_start()
66 	omap->pdata->enable(omap->dm_timer);  in pwm_omap_dmtimer_start()
67 	omap->pdata->write_counter(omap->dm_timer, DM_TIMER_LOAD_MIN);  in pwm_omap_dmtimer_start()
68 	omap->pdata->disable(omap->dm_timer);  in pwm_omap_dmtimer_start()
70 	omap->pdata->start(omap->dm_timer);  in pwm_omap_dmtimer_start()
76 	struct pwm_omap_dmtimer_chip *omap = to_pwm_omap_dmtimer_chip(chip);  in pwm_omap_dmtimer_enable()  local
78 	mutex_lock(&omap->mutex);  in pwm_omap_dmtimer_enable()
79 	pwm_omap_dmtimer_start(omap);  in pwm_omap_dmtimer_enable()
80 	mutex_unlock(&omap->mutex);  in pwm_omap_dmtimer_enable()
88 	struct pwm_omap_dmtimer_chip *omap = to_pwm_omap_dmtimer_chip(chip);  in pwm_omap_dmtimer_disable()  local
90 	mutex_lock(&omap->mutex);  in pwm_omap_dmtimer_disable()
91 	omap->pdata->stop(omap->dm_timer);  in pwm_omap_dmtimer_disable()
92 	mutex_unlock(&omap->mutex);  in pwm_omap_dmtimer_disable()
99 	struct pwm_omap_dmtimer_chip *omap = to_pwm_omap_dmtimer_chip(chip);  in pwm_omap_dmtimer_config()  local
109 	mutex_lock(&omap->mutex);  in pwm_omap_dmtimer_config()
113 		mutex_unlock(&omap->mutex);  in pwm_omap_dmtimer_config()
117 	fclk = omap->pdata->get_fclk(omap->dm_timer);  in pwm_omap_dmtimer_config()
185 	timer_active = pm_runtime_active(&omap->dm_timer_pdev->dev);  in pwm_omap_dmtimer_config()
187 		omap->pdata->stop(omap->dm_timer);  in pwm_omap_dmtimer_config()
189 	omap->pdata->set_load(omap->dm_timer, true, load_value);  in pwm_omap_dmtimer_config()
190 	omap->pdata->set_match(omap->dm_timer, true, match_value);  in pwm_omap_dmtimer_config()
195 	omap->pdata->set_pwm(omap->dm_timer,  in pwm_omap_dmtimer_config()
202 		pwm_omap_dmtimer_start(omap);  in pwm_omap_dmtimer_config()
204 	mutex_unlock(&omap->mutex);  in pwm_omap_dmtimer_config()
209 	mutex_unlock(&omap->mutex);  in pwm_omap_dmtimer_config()
218 	struct pwm_omap_dmtimer_chip *omap = to_pwm_omap_dmtimer_chip(chip);  in pwm_omap_dmtimer_set_polarity()  local
224 	mutex_lock(&omap->mutex);  in pwm_omap_dmtimer_set_polarity()
225 	omap->pdata->set_pwm(omap->dm_timer,  in pwm_omap_dmtimer_set_polarity()
229 	mutex_unlock(&omap->mutex);  in pwm_omap_dmtimer_set_polarity()
247 	struct pwm_omap_dmtimer_chip *omap;  in pwm_omap_dmtimer_probe()  local
304 	omap = devm_kzalloc(&pdev->dev, sizeof(*omap), GFP_KERNEL);  in pwm_omap_dmtimer_probe()
305 	if (!omap) {  in pwm_omap_dmtimer_probe()
310 	omap->pdata = pdata;  in pwm_omap_dmtimer_probe()
311 	omap->dm_timer = dm_timer;  in pwm_omap_dmtimer_probe()
312 	omap->dm_timer_pdev = timer_pdev;  in pwm_omap_dmtimer_probe()
318 	if (pm_runtime_active(&omap->dm_timer_pdev->dev))  in pwm_omap_dmtimer_probe()
319 		omap->pdata->stop(omap->dm_timer);  in pwm_omap_dmtimer_probe()
322 		omap->pdata->set_prescaler(omap->dm_timer, v);  in pwm_omap_dmtimer_probe()
326 		omap->pdata->set_source(omap->dm_timer, v);  in pwm_omap_dmtimer_probe()
328 	omap->chip.dev = &pdev->dev;  in pwm_omap_dmtimer_probe()
329 	omap->chip.ops = &pwm_omap_dmtimer_ops;  in pwm_omap_dmtimer_probe()
330 	omap->chip.base = -1;  in pwm_omap_dmtimer_probe()
331 	omap->chip.npwm = 1;  in pwm_omap_dmtimer_probe()
332 	omap->chip.of_xlate = of_pwm_xlate_with_flags;  in pwm_omap_dmtimer_probe()
333 	omap->chip.of_pwm_n_cells = 3;  in pwm_omap_dmtimer_probe()
335 	mutex_init(&omap->mutex);  in pwm_omap_dmtimer_probe()
337 	ret = pwmchip_add(&omap->chip);  in pwm_omap_dmtimer_probe()
345 	platform_set_drvdata(pdev, omap);  in pwm_omap_dmtimer_probe()
352 	 * *omap is allocated using devm_kzalloc,  in pwm_omap_dmtimer_probe()
373 	struct pwm_omap_dmtimer_chip *omap = platform_get_drvdata(pdev);  in pwm_omap_dmtimer_remove()  local
376 	ret = pwmchip_remove(&omap->chip);  in pwm_omap_dmtimer_remove()
380 	if (pm_runtime_active(&omap->dm_timer_pdev->dev))  in pwm_omap_dmtimer_remove()
381 		omap->pdata->stop(omap->dm_timer);  in pwm_omap_dmtimer_remove()
383 	omap->pdata->free(omap->dm_timer);  in pwm_omap_dmtimer_remove()
385 	put_device(&omap->dm_timer_pdev->dev);  in pwm_omap_dmtimer_remove()
387 	mutex_destroy(&omap->mutex);  in pwm_omap_dmtimer_remove()
393 	{.compatible = "ti,omap-dmtimer-pwm"},
400 		.name = "omap-dmtimer-pwm",
412 MODULE_DESCRIPTION("OMAP PWM Driver using Dual-mode Timers");