1 // SPDX-License-Identifier: GPL-2.0+
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
93  * Returns: modified mctrl (the same value as in @mctrl)
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
216  * @idx: index of the gpio in the @port's device
218  * This will get the {cts,rts,...}-gpios from device tree if they are present
222  * gpio input lines in your driver, too.
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()
250 		/* irqs should only be enabled in .enable_ms */  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_free - explicitly free uart gpios
273  * @gpios: gpios structure to be freed
275  * This will free the requested gpios in mctrl_gpio_init(). As `devm_*`
278 void mctrl_gpio_free(struct device *dev, struct mctrl_gpios *gpios)  in mctrl_gpio_free()  argument
282 	if (gpios == NULL)  in mctrl_gpio_free()
286 		if (gpios->irq[i])  in mctrl_gpio_free()
287 			devm_free_irq(gpios->port->dev, gpios->irq[i], gpios);  in mctrl_gpio_free()
289 		if (gpios->gpio[i])  in mctrl_gpio_free()
290 			devm_gpiod_put(dev, gpios->gpio[i]);  in mctrl_gpio_free()
292 	devm_kfree(dev, gpios);  in mctrl_gpio_free()
297  * mctrl_gpio_enable_ms - enable irqs and handling of changes to the ms lines
298  * @gpios: gpios to enable
300 void mctrl_gpio_enable_ms(struct mctrl_gpios *gpios)  in mctrl_gpio_enable_ms()  argument
304 	if (gpios == NULL)  in mctrl_gpio_enable_ms()
308 	if (gpios->mctrl_on)  in mctrl_gpio_enable_ms()
311 	gpios->mctrl_on = true;  in mctrl_gpio_enable_ms()
313 	/* get initial status of modem lines GPIOs */  in mctrl_gpio_enable_ms()
314 	mctrl_gpio_get(gpios, &gpios->mctrl_prev);  in mctrl_gpio_enable_ms()
317 		if (!gpios->irq[i])  in mctrl_gpio_enable_ms()
320 		enable_irq(gpios->irq[i]);  in mctrl_gpio_enable_ms()
326  * mctrl_gpio_disable_ms - disable irqs and handling of changes to the ms lines
327  * @gpios: gpios to disable
329 void mctrl_gpio_disable_ms(struct mctrl_gpios *gpios)  in mctrl_gpio_disable_ms()  argument
333 	if (gpios == NULL)  in mctrl_gpio_disable_ms()
336 	if (!gpios->mctrl_on)  in mctrl_gpio_disable_ms()
339 	gpios->mctrl_on = false;  in mctrl_gpio_disable_ms()
342 		if (!gpios->irq[i])  in mctrl_gpio_disable_ms()
345 		disable_irq(gpios->irq[i]);  in mctrl_gpio_disable_ms()
350 void mctrl_gpio_enable_irq_wake(struct mctrl_gpios *gpios)  in mctrl_gpio_enable_irq_wake()  argument
354 	if (!gpios)  in mctrl_gpio_enable_irq_wake()
357 	if (!gpios->mctrl_on)  in mctrl_gpio_enable_irq_wake()
361 		if (!gpios->irq[i])  in mctrl_gpio_enable_irq_wake()
364 		enable_irq_wake(gpios->irq[i]);  in mctrl_gpio_enable_irq_wake()
369 void mctrl_gpio_disable_irq_wake(struct mctrl_gpios *gpios)  in mctrl_gpio_disable_irq_wake()  argument
373 	if (!gpios)  in mctrl_gpio_disable_irq_wake()
376 	if (!gpios->mctrl_on)  in mctrl_gpio_disable_irq_wake()
380 		if (!gpios->irq[i])  in mctrl_gpio_disable_irq_wake()
383 		disable_irq_wake(gpios->irq[i]);  in mctrl_gpio_disable_irq_wake()