1 // SPDX-License-Identifier: GPL-2.0+
34 	{ "dcd", TIOCM_CD,  GPIOD_IN, },
46  * mctrl_gpio_set - set gpios according to mctrl state
47  * @gpios: gpios to set
50  * Set the gpios according to the mctrl state.
52 void mctrl_gpio_set(struct mctrl_gpios *gpios, unsigned int mctrl)  in mctrl_gpio_set()  argument
59 	if (gpios == NULL)  in mctrl_gpio_set()
63 		if (gpios->gpio[i] && mctrl_gpio_flags_is_dir_out(i)) {  in mctrl_gpio_set()
64 			desc_array[count] = gpios->gpio[i];  in mctrl_gpio_set()
74  * mctrl_gpio_to_gpiod - obtain gpio_desc of modem line index
75  * @gpios: gpios to look into
79 struct gpio_desc *mctrl_gpio_to_gpiod(struct mctrl_gpios *gpios,  in mctrl_gpio_to_gpiod()  argument
82 	if (gpios == NULL)  in mctrl_gpio_to_gpiod()
85 	return gpios->gpio[gidx];  in mctrl_gpio_to_gpiod()
90  * mctrl_gpio_get - update mctrl with the gpios values.
91  * @gpios: gpios to get the info from
95  * Update mctrl with the gpios values.
97 unsigned int mctrl_gpio_get(struct mctrl_gpios *gpios, unsigned int *mctrl)  in mctrl_gpio_get()  argument
101 	if (gpios == NULL)  in mctrl_gpio_get()
105 		if (gpios->gpio[i] && !mctrl_gpio_flags_is_dir_out(i)) {  in mctrl_gpio_get()
106 			if (gpiod_get_value(gpios->gpio[i]))  in mctrl_gpio_get()
118 mctrl_gpio_get_outputs(struct mctrl_gpios *gpios, unsigned int *mctrl)  in mctrl_gpio_get_outputs()  argument
122 	if (gpios == NULL)  in mctrl_gpio_get_outputs()
126 		if (gpios->gpio[i] && mctrl_gpio_flags_is_dir_out(i)) {  in mctrl_gpio_get_outputs()
127 			if (gpiod_get_value(gpios->gpio[i]))  in mctrl_gpio_get_outputs()
140 	struct mctrl_gpios *gpios;  in mctrl_gpio_init_noauto()  local
143 	gpios = devm_kzalloc(dev, sizeof(*gpios), GFP_KERNEL);  in mctrl_gpio_init_noauto()
144 	if (!gpios)  in mctrl_gpio_init_noauto()
145 		return ERR_PTR(-ENOMEM);  in mctrl_gpio_init_noauto()
152 		gpio_str = kasprintf(GFP_KERNEL, "%s-gpios",  in mctrl_gpio_init_noauto()
162 		gpios->gpio[i] =  in mctrl_gpio_init_noauto()
168 		if (IS_ERR(gpios->gpio[i]))  in mctrl_gpio_init_noauto()
169 			return ERR_CAST(gpios->gpio[i]);  in mctrl_gpio_init_noauto()
172 	return gpios;  in mctrl_gpio_init_noauto()
179 	struct mctrl_gpios *gpios = context;  in mctrl_gpio_irq_handle()  local
180 	struct uart_port *port = gpios->port;  in mctrl_gpio_irq_handle()
181 	u32 mctrl = gpios->mctrl_prev;  in mctrl_gpio_irq_handle()
185 	mctrl_gpio_get(gpios, &mctrl);  in mctrl_gpio_irq_handle()
189 	mctrl_diff = mctrl ^ gpios->mctrl_prev;  in mctrl_gpio_irq_handle()
190 	gpios->mctrl_prev = mctrl;  in mctrl_gpio_irq_handle()
192 	if (mctrl_diff & MCTRL_ANY_DELTA && port->state != NULL) {  in mctrl_gpio_irq_handle()
194 			port->icount.rng++;  in mctrl_gpio_irq_handle()
197 			port->icount.dsr++;  in mctrl_gpio_irq_handle()
205 		wake_up_interruptible(&port->state->port.delta_msr_wait);  in mctrl_gpio_irq_handle()
214  * mctrl_gpio_init - initialize uart gpios
215  * @port: port to initialize gpios for
218  * This will get the {cts,rts,...}-gpios from device tree if they are present
226 	struct mctrl_gpios *gpios;  in mctrl_gpio_init()  local
229 	gpios = mctrl_gpio_init_noauto(port->dev, idx);  in mctrl_gpio_init()
230 	if (IS_ERR(gpios))  in mctrl_gpio_init()
231 		return gpios;  in mctrl_gpio_init()
233 	gpios->port = port;  in mctrl_gpio_init()
238 		if (!gpios->gpio[i] || mctrl_gpio_flags_is_dir_out(i))  in mctrl_gpio_init()
241 		ret = gpiod_to_irq(gpios->gpio[i]);  in mctrl_gpio_init()
243 			dev_err(port->dev,  in mctrl_gpio_init()
248 		gpios->irq[i] = ret;  in mctrl_gpio_init()
251 		irq_set_status_flags(gpios->irq[i], IRQ_NOAUTOEN);  in mctrl_gpio_init()
253 		ret = devm_request_irq(port->dev, gpios->irq[i],  in mctrl_gpio_init()
255 				       IRQ_TYPE_EDGE_BOTH, dev_name(port->dev),  in mctrl_gpio_init()
256 				       gpios);  in mctrl_gpio_init()
259 			dev_err(port->dev,  in mctrl_gpio_init()
266 	return gpios;  in mctrl_gpio_init()
271  * mctrl_gpio_enable_ms - enable irqs and handling of changes to the ms lines
272  * @gpios: gpios to enable
274 void mctrl_gpio_enable_ms(struct mctrl_gpios *gpios)  in mctrl_gpio_enable_ms()  argument
278 	if (gpios == NULL)  in mctrl_gpio_enable_ms()
282 	if (gpios->mctrl_on)  in mctrl_gpio_enable_ms()
285 	gpios->mctrl_on = true;  in mctrl_gpio_enable_ms()
287 	/* get initial status of modem lines GPIOs */  in mctrl_gpio_enable_ms()
288 	mctrl_gpio_get(gpios, &gpios->mctrl_prev);  in mctrl_gpio_enable_ms()
291 		if (!gpios->irq[i])  in mctrl_gpio_enable_ms()
294 		enable_irq(gpios->irq[i]);  in mctrl_gpio_enable_ms()
299 static void mctrl_gpio_disable_ms(struct mctrl_gpios *gpios, bool sync)  in mctrl_gpio_disable_ms()  argument
303 	if (gpios == NULL)  in mctrl_gpio_disable_ms()
306 	if (!gpios->mctrl_on)  in mctrl_gpio_disable_ms()
309 	gpios->mctrl_on = false;  in mctrl_gpio_disable_ms()
312 		if (!gpios->irq[i])  in mctrl_gpio_disable_ms()
316 			disable_irq(gpios->irq[i]);  in mctrl_gpio_disable_ms()
318 			disable_irq_nosync(gpios->irq[i]);  in mctrl_gpio_disable_ms()
323  * mctrl_gpio_disable_ms_sync - disable irqs and handling of changes to the ms
325  * @gpios: gpios to disable
327 void mctrl_gpio_disable_ms_sync(struct mctrl_gpios *gpios)  in mctrl_gpio_disable_ms_sync()  argument
329 	mctrl_gpio_disable_ms(gpios, true);  in mctrl_gpio_disable_ms_sync()
334  * mctrl_gpio_disable_ms_no_sync - disable irqs and handling of changes to the
336  * @gpios: gpios to disable
338 void mctrl_gpio_disable_ms_no_sync(struct mctrl_gpios *gpios)  in mctrl_gpio_disable_ms_no_sync()  argument
340 	mctrl_gpio_disable_ms(gpios, false);  in mctrl_gpio_disable_ms_no_sync()
344 void mctrl_gpio_enable_irq_wake(struct mctrl_gpios *gpios)  in mctrl_gpio_enable_irq_wake()  argument
348 	if (!gpios)  in mctrl_gpio_enable_irq_wake()
351 	if (!gpios->mctrl_on)  in mctrl_gpio_enable_irq_wake()
355 		if (!gpios->irq[i])  in mctrl_gpio_enable_irq_wake()
358 		enable_irq_wake(gpios->irq[i]);  in mctrl_gpio_enable_irq_wake()
363 void mctrl_gpio_disable_irq_wake(struct mctrl_gpios *gpios)  in mctrl_gpio_disable_irq_wake()  argument
367 	if (!gpios)  in mctrl_gpio_disable_irq_wake()
370 	if (!gpios->mctrl_on)  in mctrl_gpio_disable_irq_wake()
374 		if (!gpios->irq[i])  in mctrl_gpio_disable_irq_wake()
377 		disable_irq_wake(gpios->irq[i]);  in mctrl_gpio_disable_irq_wake()