RPI kernel 4.19 support

root/target/linux/brcm2708/patches-4.19/0104-mcp2515-Use-DT-supplied-interrupt-flags.patch

@@ -0,0 +1,41 @@
+From f6c46f71dcfab0527183c8b35baac8d7f2ef229f Mon Sep 17 00:00:00 2001
+From: Phil Elwell <phil@raspberrypi.org>
+Date: Tue, 14 Nov 2017 11:03:22 +0000
+Subject: [PATCH 104/432] mcp2515: Use DT-supplied interrupt flags
+
+The MCP2515 datasheet clearly describes a level-triggered interrupt
+pin. Therefore the receiving interrupt controller must also be
+configured for level-triggered operation otherwise there is a danger
+of a missed interrupt condition blocking all subsequent interrupts.
+The ONESHOT flag ensures that the interrupt is masked until the
+threaded interrupt handler exits.
+
+Rather than change the flags globally (they must have worked for at
+least one user), allow the flags to be overridden from Device Tree
+in the event that the device has a DT node.
+
+See: https://github.com/raspberrypi/linux/issues/2175
+     https://github.com/raspberrypi/linux/issues/2263
+
+Signed-off-by: Phil Elwell <phil@raspberrypi.org>
+---
+ drivers/net/can/spi/mcp251x.c | 3 +++
+ 1 file changed, 3 insertions(+)
+
+diff --git a/drivers/net/can/spi/mcp251x.c b/drivers/net/can/spi/mcp251x.c
+index e90817608645..663203fbb1b8 100644
+--- a/drivers/net/can/spi/mcp251x.c
++++ b/drivers/net/can/spi/mcp251x.c
+@@ -951,6 +951,9 @@ static int mcp251x_open(struct net_device *net)
+ 	priv->tx_skb = NULL;
+ 	priv->tx_len = 0;
+ 
++	if (spi->dev.of_node)
++	    flags = 0;
++
+ 	ret = request_threaded_irq(spi->irq, NULL, mcp251x_can_ist,
+ 				   flags | IRQF_ONESHOT, DEVICE_NAME, priv);
+ 	if (ret) {
+-- 
+2.19.1
+