platform/cec-gpio/cec-gpio.c

11 #include <media/cec-notifier.h>
12 #include <media/cec-pin.h>
36 	struct cec_gpio *cec = cec_get_drvdata(adap);
38 	if (cec->cec_is_low)
40 	return gpiod_get_value(cec->cec_gpio);
45 	struct cec_gpio *cec = cec_get_drvdata(adap);
47 	if (!cec->cec_is_low)
49 	cec->cec_is_low = false;
50 	gpiod_set_value(cec->cec_gpio, 1);
55 	struct cec_gpio *cec = cec_get_drvdata(adap);
57 	if (cec->cec_is_low)
59 	cec->cec_is_low = true;
60 	gpiod_set_value(cec->cec_gpio, 0);
65 	struct cec_gpio *cec = priv;
67 	cec_queue_pin_hpd_event(cec->adap, cec->hpd_is_high, cec->hpd_ts);
73 	struct cec_gpio *cec = priv;
74 	int val = gpiod_get_value(cec->v5_gpio);
77 	if (val < 0 || is_high == cec->v5_is_high)
79 	cec->v5_ts = ktime_get();
80 	cec->v5_is_high = is_high;
86 	struct cec_gpio *cec = priv;
88 	cec_queue_pin_5v_event(cec->adap, cec->v5_is_high, cec->v5_ts);
94 	struct cec_gpio *cec = priv;
95 	int val = gpiod_get_value(cec->hpd_gpio);
98 	if (val < 0 || is_high == cec->hpd_is_high)
100 	cec->hpd_ts = ktime_get();
101 	cec->hpd_is_high = is_high;
107 	struct cec_gpio *cec = priv;
108 	int val = gpiod_get_value(cec->cec_gpio);
111 		cec_pin_changed(cec->adap, val > 0);
117 	struct cec_gpio *cec = cec_get_drvdata(adap);
119 	enable_irq(cec->cec_irq);
125 	struct cec_gpio *cec = cec_get_drvdata(adap);
127 	disable_irq(cec->cec_irq);
132 	struct cec_gpio *cec = cec_get_drvdata(adap);
134 	seq_printf(file, "mode: %s\n", cec->cec_is_low ? "low-drive" : "read");
135 	seq_printf(file, "using irq: %d\n", cec->cec_irq);
136 	if (cec->hpd_gpio)
138 			   cec->hpd_is_high ? "high" : "low");
139 	if (cec->v5_gpio)
141 			   cec->v5_is_high ? "high" : "low");
146 	struct cec_gpio *cec = cec_get_drvdata(adap);
148 	if (!cec->hpd_gpio)
150 	return gpiod_get_value(cec->hpd_gpio);
155 	struct cec_gpio *cec = cec_get_drvdata(adap);
157 	if (!cec->v5_gpio)
159 	return gpiod_get_value(cec->v5_gpio);
177 	struct cec_gpio *cec;
187 	cec = devm_kzalloc(dev, sizeof(*cec), GFP_KERNEL);
188 	if (!cec)
191 	cec->dev = dev;
193 	cec->cec_gpio = devm_gpiod_get(dev, "cec", GPIOD_OUT_HIGH_OPEN_DRAIN);
194 	if (IS_ERR(cec->cec_gpio))
195 		return PTR_ERR(cec->cec_gpio);
196 	cec->cec_irq = gpiod_to_irq(cec->cec_gpio);
198 	cec->hpd_gpio = devm_gpiod_get_optional(dev, "hpd", GPIOD_IN);
199 	if (IS_ERR(cec->hpd_gpio))
200 		return PTR_ERR(cec->hpd_gpio);
202 	cec->v5_gpio = devm_gpiod_get_optional(dev, "v5", GPIOD_IN);
203 	if (IS_ERR(cec->v5_gpio))
204 		return PTR_ERR(cec->v5_gpio);
206 	cec->adap = cec_pin_allocate_adapter(&cec_gpio_pin_ops,
207 					     cec, pdev->name, caps);
208 	if (IS_ERR(cec->adap))
209 		return PTR_ERR(cec->adap);
211 	ret = devm_request_irq(dev, cec->cec_irq, cec_gpio_irq_handler,
213 			       cec->adap->name, cec);
217 	if (cec->hpd_gpio) {
218 		cec->hpd_irq = gpiod_to_irq(cec->hpd_gpio);
219 		ret = devm_request_threaded_irq(dev, cec->hpd_irq,
224 			"hpd-gpio", cec);
229 	if (cec->v5_gpio) {
230 		cec->v5_irq = gpiod_to_irq(cec->v5_gpio);
231 		ret = devm_request_threaded_irq(dev, cec->v5_irq,
236 			"v5-gpio", cec);
242 		cec->notifier = cec_notifier_cec_adap_register(hdmi_dev, NULL,
243 							       cec->adap);
244 		if (!cec->notifier) {
250 	ret = cec_register_adapter(cec->adap, &pdev->dev);
254 	platform_set_drvdata(pdev, cec);
258 	cec_notifier_cec_adap_unregister(cec->notifier, cec->adap);
260 	cec_delete_adapter(cec->adap);
266 	struct cec_gpio *cec = platform_get_drvdata(pdev);
268 	cec_notifier_cec_adap_unregister(cec->notifier, cec->adap);
269 	cec_unregister_adapter(cec->adap);
274 		.compatible	= "cec-gpio",
284 		.name		= "cec-gpio",