can: mcp251x: Allow pass IRQ flags through platform data.
authorEnric Balletbo i Serra <eballetbo@iseebcn.com>
Tue, 5 Apr 2011 07:08:41 +0000 (07:08 +0000)
committerDavid S. Miller <davem@davemloft.net>
Wed, 6 Apr 2011 19:24:26 +0000 (12:24 -0700)
When an interrupt occurs, the INT pin is driven low by the
MCP251x controller (falling edge) but in some cases the INT
pin can be connected to the MPU through a transistor or level
translator which inverts this signal. In this case interrupt
should be configured in rising edge.

This patch adds support to pass the IRQ flags via
mcp251x_platform_data.

Signed-off-by: Enric Balletbo i Serra <eballetbo@iseebcn.com>
Acked-by: Wolfgang Grandegger <wg@grandegger.com>
Acked-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
drivers/net/can/mcp251x.c
include/linux/can/platform/mcp251x.h

index 7513c45..330140e 100644 (file)
@@ -931,7 +931,8 @@ static int mcp251x_open(struct net_device *net)
        priv->tx_len = 0;
 
        ret = request_threaded_irq(spi->irq, NULL, mcp251x_can_ist,
-                         IRQF_TRIGGER_FALLING, DEVICE_NAME, priv);
+                 pdata->irq_flags ? pdata->irq_flags : IRQF_TRIGGER_FALLING,
+                 DEVICE_NAME, priv);
        if (ret) {
                dev_err(&spi->dev, "failed to acquire irq %d\n", spi->irq);
                if (pdata->transceiver_enable)
index 8e20540..089fe43 100644 (file)
@@ -12,6 +12,7 @@
 /**
  * struct mcp251x_platform_data - MCP251X SPI CAN controller platform data
  * @oscillator_frequency:       - oscillator frequency in Hz
+ * @irq_flags:                  - IRQF configuration flags
  * @board_specific_setup:       - called before probing the chip (power,reset)
  * @transceiver_enable:         - called to power on/off the transceiver
  * @power_enable:               - called to power on/off the mcp *and* the
@@ -24,6 +25,7 @@
 
 struct mcp251x_platform_data {
        unsigned long oscillator_frequency;
+       unsigned long irq_flags;
        int (*board_specific_setup)(struct spi_device *spi);
        int (*transceiver_enable)(int enable);
        int (*power_enable) (int enable);