diff options
Diffstat (limited to 'drivers/media/platform/cec-gpio/cec-gpio.c')
| -rw-r--r-- | drivers/media/platform/cec-gpio/cec-gpio.c | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/drivers/media/platform/cec-gpio/cec-gpio.c b/drivers/media/platform/cec-gpio/cec-gpio.c index 69f8242209c2..d2861749d640 100644 --- a/drivers/media/platform/cec-gpio/cec-gpio.c +++ b/drivers/media/platform/cec-gpio/cec-gpio.c @@ -23,6 +23,11 @@ struct cec_gpio { int hpd_irq; bool hpd_is_high; ktime_t hpd_ts; + + struct gpio_desc *v5_gpio; + int v5_irq; + bool v5_is_high; + ktime_t v5_ts; }; static bool cec_gpio_read(struct cec_adapter *adap) @@ -65,6 +70,26 @@ static irqreturn_t cec_hpd_gpio_irq_handler_thread(int irq, void *priv) return IRQ_HANDLED; } +static irqreturn_t cec_5v_gpio_irq_handler(int irq, void *priv) +{ + struct cec_gpio *cec = priv; + bool is_high = gpiod_get_value(cec->v5_gpio); + + if (is_high == cec->v5_is_high) + return IRQ_HANDLED; + cec->v5_ts = ktime_get(); + cec->v5_is_high = is_high; + return IRQ_WAKE_THREAD; +} + +static irqreturn_t cec_5v_gpio_irq_handler_thread(int irq, void *priv) +{ + struct cec_gpio *cec = priv; + + cec_queue_pin_5v_event(cec->adap, cec->v5_is_high, cec->v5_ts); + return IRQ_HANDLED; +} + static irqreturn_t cec_hpd_gpio_irq_handler(int irq, void *priv) { struct cec_gpio *cec = priv; @@ -119,6 +144,9 @@ static void cec_gpio_status(struct cec_adapter *adap, struct seq_file *file) if (cec->hpd_gpio) seq_printf(file, "hpd: %s\n", cec->hpd_is_high ? "high" : "low"); + if (cec->v5_gpio) + seq_printf(file, "5V: %s\n", + cec->v5_is_high ? "high" : "low"); } static int cec_gpio_read_hpd(struct cec_adapter *adap) @@ -130,6 +158,15 @@ static int cec_gpio_read_hpd(struct cec_adapter *adap) return gpiod_get_value(cec->hpd_gpio); } +static int cec_gpio_read_5v(struct cec_adapter *adap) +{ + struct cec_gpio *cec = cec_get_drvdata(adap); + + if (!cec->v5_gpio) + return -ENOTTY; + return gpiod_get_value(cec->v5_gpio); +} + static void cec_gpio_free(struct cec_adapter *adap) { cec_gpio_disable_irq(adap); @@ -144,6 +181,7 @@ static const struct cec_pin_ops cec_gpio_pin_ops = { .status = cec_gpio_status, .free = cec_gpio_free, .read_hpd = cec_gpio_read_hpd, + .read_5v = cec_gpio_read_5v, }; static int cec_gpio_probe(struct platform_device *pdev) @@ -167,6 +205,10 @@ static int cec_gpio_probe(struct platform_device *pdev) if (IS_ERR(cec->hpd_gpio)) return PTR_ERR(cec->hpd_gpio); + cec->v5_gpio = devm_gpiod_get_optional(dev, "v5", GPIOD_IN); + if (IS_ERR(cec->v5_gpio)) + return PTR_ERR(cec->v5_gpio); + cec->adap = cec_pin_allocate_adapter(&cec_gpio_pin_ops, cec, pdev->name, CEC_CAP_DEFAULTS | CEC_CAP_PHYS_ADDR | CEC_CAP_MONITOR_ALL | CEC_CAP_MONITOR_PIN); @@ -185,6 +227,18 @@ static int cec_gpio_probe(struct platform_device *pdev) return ret; } + if (cec->v5_gpio) { + cec->v5_irq = gpiod_to_irq(cec->v5_gpio); + ret = devm_request_threaded_irq(dev, cec->v5_irq, + cec_5v_gpio_irq_handler, + cec_5v_gpio_irq_handler_thread, + IRQF_ONESHOT | + IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING, + "v5-gpio", cec); + if (ret) + return ret; + } + ret = cec_register_adapter(cec->adap, &pdev->dev); if (ret) { cec_delete_adapter(cec->adap); |