[PATCH/RFC] can: mcp251x: Allow pass IRQ flags through platform data.
From: Enric Balletbo i Serra <hidden>
Date: 2011-04-05 17:09:14
Subsystem:
can network drivers, the rest · Maintainers:
Marc Kleine-Budde, Vincent Mailhol, Linus Torvalds
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 <redacted> --- drivers/net/can/mcp251x.c | 3 ++- include/linux/can/platform/mcp251x.h | 2 ++ 2 files changed, 4 insertions(+), 1 deletions(-)
diff --git a/drivers/net/can/mcp251x.c b/drivers/net/can/mcp251x.c
index 7513c45..330140e 100644
--- a/drivers/net/can/mcp251x.c
+++ b/drivers/net/can/mcp251x.c@@ -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)
diff --git a/include/linux/can/platform/mcp251x.h b/include/linux/can/platform/mcp251x.h
index 8e20540..089fe43 100644
--- a/include/linux/can/platform/mcp251x.h
+++ b/include/linux/can/platform/mcp251x.h@@ -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);
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1.7.0.4