1 // SPDX-License-Identifier: GPL-2.0-only
3  * nokia-modem.c
32 	struct nokia_modem_gpio	*gpios;  member
45 	dev_info(modem->device, "CMT rst line change detected\n");  in do_nokia_modem_rst_ind_tasklet()
47 	if (modem->ssi_protocol)  in do_nokia_modem_rst_ind_tasklet()
48 		ssip_reset_event(modem->ssi_protocol);  in do_nokia_modem_rst_ind_tasklet()
55 	tasklet_schedule(&modem->nokia_modem_rst_ind_tasklet);  in nokia_modem_rst_ind_isr()
65 	for (i = 0; i < modem->gpio_amount; i++) {  in nokia_modem_gpio_unexport()
66 		sysfs_remove_link(&dev->kobj, modem->gpios[i].name);  in nokia_modem_gpio_unexport()
67 		gpiod_unexport(modem->gpios[i].gpio);  in nokia_modem_gpio_unexport()
73 	struct device_node *np = dev->of_node;  in nokia_modem_gpio_probe()
79 		dev_err(dev, "missing gpios: %d\n", gpio_count);  in nokia_modem_gpio_probe()
83 	gpio_name_count = of_property_count_strings(np, "gpio-names");  in nokia_modem_gpio_probe()
86 		dev_err(dev, "number of gpios does not equal number of gpio names\n");  in nokia_modem_gpio_probe()
87 		return -EINVAL;  in nokia_modem_gpio_probe()
90 	modem->gpios = devm_kcalloc(dev, gpio_count, sizeof(*modem->gpios),  in nokia_modem_gpio_probe()
92 	if (!modem->gpios)  in nokia_modem_gpio_probe()
93 		return -ENOMEM;  in nokia_modem_gpio_probe()
95 	modem->gpio_amount = gpio_count;  in nokia_modem_gpio_probe()
98 		modem->gpios[i].gpio = devm_gpiod_get_index(dev, NULL, i,  in nokia_modem_gpio_probe()
100 		if (IS_ERR(modem->gpios[i].gpio)) {  in nokia_modem_gpio_probe()
102 			return PTR_ERR(modem->gpios[i].gpio);  in nokia_modem_gpio_probe()
105 		err = of_property_read_string_index(np, "gpio-names", i,  in nokia_modem_gpio_probe()
106 						&(modem->gpios[i].name));  in nokia_modem_gpio_probe()
112 		err = gpiod_export(modem->gpios[i].gpio, 0);  in nokia_modem_gpio_probe()
116 		err = gpiod_export_link(dev, modem->gpios[i].name,  in nokia_modem_gpio_probe()
117 							modem->gpios[i].gpio);  in nokia_modem_gpio_probe()
135 	np = dev->of_node;  in nokia_modem_probe()
138 		return -ENXIO;  in nokia_modem_probe()
143 		return -ENOMEM;  in nokia_modem_probe()
146 	modem->device = dev;  in nokia_modem_probe()
151 		return -EINVAL;  in nokia_modem_probe()
153 	modem->nokia_modem_rst_ind_irq = irq;  in nokia_modem_probe()
156 	tasklet_init(&modem->nokia_modem_rst_ind_tasklet,  in nokia_modem_probe()
161 		dev_err(dev, "Request rst_ind irq(%d) failed (flags %d)\n",  in nokia_modem_probe()
170 			dev_err(dev, "Could not probe GPIOs\n");  in nokia_modem_probe()
175 	ssip.name = "ssi-protocol";  in nokia_modem_probe()
176 	ssip.tx_cfg = cl->tx_cfg;  in nokia_modem_probe()
177 	ssip.rx_cfg = cl->rx_cfg;  in nokia_modem_probe()
181 	modem->ssi_protocol = hsi_new_client(port, &ssip);  in nokia_modem_probe()
182 	if (!modem->ssi_protocol) {  in nokia_modem_probe()
183 		dev_err(dev, "Could not register ssi-protocol device\n");  in nokia_modem_probe()
184 		err = -ENOMEM;  in nokia_modem_probe()
188 	err = device_attach(&modem->ssi_protocol->device);  in nokia_modem_probe()
190 		dev_dbg(dev, "Missing ssi-protocol driver\n");  in nokia_modem_probe()
191 		err = -EPROBE_DEFER;  in nokia_modem_probe()
194 		dev_err(dev, "Could not load ssi-protocol driver (%d)\n", err);  in nokia_modem_probe()
198 	cmtspeech.name = "cmt-speech";  in nokia_modem_probe()
199 	cmtspeech.tx_cfg = cl->tx_cfg;  in nokia_modem_probe()
200 	cmtspeech.rx_cfg = cl->rx_cfg;  in nokia_modem_probe()
204 	modem->cmt_speech = hsi_new_client(port, &cmtspeech);  in nokia_modem_probe()
205 	if (!modem->cmt_speech) {  in nokia_modem_probe()
206 		dev_err(dev, "Could not register cmt-speech device\n");  in nokia_modem_probe()
207 		err = -ENOMEM;  in nokia_modem_probe()
211 	err = device_attach(&modem->cmt_speech->device);  in nokia_modem_probe()
213 		dev_dbg(dev, "Missing cmt-speech driver\n");  in nokia_modem_probe()
214 		err = -EPROBE_DEFER;  in nokia_modem_probe()
217 		dev_err(dev, "Could not load cmt-speech driver (%d)\n", err);  in nokia_modem_probe()
226 	hsi_remove_client(&modem->cmt_speech->device, NULL);  in nokia_modem_probe()
228 	hsi_remove_client(&modem->ssi_protocol->device, NULL);  in nokia_modem_probe()
232 	disable_irq_wake(modem->nokia_modem_rst_ind_irq);  in nokia_modem_probe()
233 	tasklet_kill(&modem->nokia_modem_rst_ind_tasklet);  in nokia_modem_probe()
245 	if (modem->cmt_speech) {  in nokia_modem_remove()
246 		hsi_remove_client(&modem->cmt_speech->device, NULL);  in nokia_modem_remove()
247 		modem->cmt_speech = NULL;  in nokia_modem_remove()
250 	if (modem->ssi_protocol) {  in nokia_modem_remove()
251 		hsi_remove_client(&modem->ssi_protocol->device, NULL);  in nokia_modem_remove()
252 		modem->ssi_protocol = NULL;  in nokia_modem_remove()
257 	disable_irq_wake(modem->nokia_modem_rst_ind_irq);  in nokia_modem_remove()
258 	tasklet_kill(&modem->nokia_modem_rst_ind_tasklet);  in nokia_modem_remove()
265 	{ .compatible = "nokia,n900-modem", },
266 	{ .compatible = "nokia,n950-modem", },
267 	{ .compatible = "nokia,n9-modem", },
275 		.name	= "nokia-modem",
295 MODULE_ALIAS("hsi:nokia-modem");