From 2fd36c55264926e268deb50f6de5f43fa5e490f7 Mon Sep 17 00:00:00 2001 From: Laurent Pinchart Date: Thu, 30 Oct 2014 15:59:38 +0200 Subject: [PATCH] i2c: core: Map OF IRQ at probe time I2C clients instantiated from OF get their IRQ mapped at device registration time. This leads to the IRQ being silently ignored if the related irqchip hasn't been proved yet. Fix this by moving IRQ mapping at probe time using of_get_irq(). The function operates as irq_of_parse_and_map() but additionally returns -EPROBE_DEFER if the irqchip isn't available, allowing us to defer I2C client probing. Signed-off-by: Laurent Pinchart Signed-off-by: Wolfram Sang --- drivers/i2c/i2c-core.c | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c index f43b4e11647a..a0768d6dffc2 100644 --- a/drivers/i2c/i2c-core.c +++ b/drivers/i2c/i2c-core.c @@ -626,6 +626,15 @@ static int i2c_device_probe(struct device *dev) if (!client) return 0; + if (!client->irq && dev->of_node) { + int irq = of_irq_get(dev->of_node, 0); + + if (irq < 0) + return irq; + + client->irq = irq; + } + driver = to_i2c_driver(dev->driver); if (!driver->probe || !driver->id_table) return -ENODEV; @@ -1407,7 +1416,6 @@ static void of_i2c_register_devices(struct i2c_adapter *adap) continue; } - info.irq = irq_of_parse_and_map(node, 0); info.of_node = of_node_get(node); info.archdata = &dev_ad; @@ -1421,7 +1429,6 @@ static void of_i2c_register_devices(struct i2c_adapter *adap) dev_err(&adap->dev, "of_i2c: Failure registering %s\n", node->full_name); of_node_put(node); - irq_dispose_mapping(info.irq); continue; } } -- 2.20.1