1 /*-
2  * SPDX-License-Identifier: BSD-2-Clause
67 	{ "allwinner,sun5i-a13-pwm",		1 },
68 	{ "allwinner,sun8i-h3-pwm",		1 },
74 	{ -1, 0 }
101 	36000,
109 #define	AW_PWM_READ(sc, reg)		bus_read_4((sc)->res, (reg))
110 #define	AW_PWM_WRITE(sc, reg, val)	bus_write_4((sc)->res, (reg), (val))
122 	if (!ofw_bus_search_compatible(dev, compat_data)->ocd_data)  in aw_pwm_probe()
139 	sc->dev = dev;  in aw_pwm_attach()
141 	error = clk_get_by_ofw_index(dev, 0, 0, &sc->clk);  in aw_pwm_attach()
146 	error = clk_enable(sc->clk);  in aw_pwm_attach()
152 	error = clk_get_freq(sc->clk, &sc->clk_freq);  in aw_pwm_attach()
158 	if (bus_alloc_resources(dev, aw_pwm_spec, &sc->res) != 0) {  in aw_pwm_attach()
164 	/* Read the configuration left by U-Boot */  in aw_pwm_attach()
167 		sc->enabled = true;  in aw_pwm_attach()
175 	clk_freq = sc->clk_freq / aw_pwm_clk_prescaler[reg];  in aw_pwm_attach()
178 	sc->period = NS_PER_SEC /  in aw_pwm_attach()
180 	sc->duty = NS_PER_SEC /  in aw_pwm_attach()
185 	 * Note that we don't check for failure to attach pwmbus -- even without  in aw_pwm_attach()
191 	sc->busdev = device_add_child(dev, "pwmbus", DEVICE_UNIT_ANY);  in aw_pwm_attach()
209 	if ((error = bus_generic_detach(sc->dev)) != 0) {  in aw_pwm_detach()
210 		device_printf(sc->dev, "cannot detach child devices\n");  in aw_pwm_detach()
214 	if (sc->busdev != NULL)  in aw_pwm_detach()
215 		device_delete_child(dev, sc->busdev);  in aw_pwm_detach()
217 	if (sc->res != NULL)  in aw_pwm_detach()
218 		bus_release_resources(dev, aw_pwm_spec, &sc->res);  in aw_pwm_detach()
260 	 * FIXME.  The hardware is capable of sub-Hz frequencies, that is,  in aw_pwm_channel_config()
274 		device_printf(sc->dev, "duty < period\n");  in aw_pwm_channel_config()
282 	if ((div - 1) > AW_PWM_PERIOD_TOTAL_MASK) {  in aw_pwm_channel_config()
288 			if ((div - 1) < AW_PWM_PERIOD_TOTAL_MASK ) {  in aw_pwm_channel_config()
313 	reg = ((clk_rate / period_freq - 1) << AW_PWM_PERIOD_TOTAL_SHIFT) |  in aw_pwm_channel_config()
317 	sc->period = period;  in aw_pwm_channel_config()
318 	sc->duty = duty;  in aw_pwm_channel_config()
330 	*period = sc->period;  in aw_pwm_channel_get_config()
331 	*duty = sc->duty;  in aw_pwm_channel_get_config()
344 	if (enable && sc->enabled)  in aw_pwm_channel_enable()
355 	sc->enabled = enable;  in aw_pwm_channel_enable()
367 	*enabled = sc->enabled;  in aw_pwm_channel_is_enabled()