brcm2708: add linux 4.19 support

Boot tested on Raspberry Pi B+ (BCM2708) and Raspberry Pi 2 (BCM2709)

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>

1 files changed, 35 insertions, 0 deletions

diff --git a/target/linux/brcm2708/patches-4.19/950-0557-spi-bcm2835-enable-shared-interrupt-support.patch b/target/linux/brcm2708/patches-4.19/950-0557-spi-bcm2835-enable-shared-interrupt-support.patch
new file mode 100644
index 0000000000..698134562d
--- /dev/null
+++ b/target/linux/brcm2708/patches-4.19/950-0557-spi-bcm2835-enable-shared-interrupt-support.patch
@@ -0,0 +1,35 @@
+From 6dc0f30ee18404547a2ca94fd11914ea0d75841f Mon Sep 17 00:00:00 2001
+From: Martin Sperl <kernel@martin.sperl.org>
+Date: Mon, 13 May 2019 11:05:27 +0000
+Subject: [PATCH 557/703] spi: bcm2835: enable shared interrupt support
+
+Add shared interrupt support for this driver.
+
+Signed-off-by: Martin Sperl <kernel@martin.sperl.org>
+---
+ drivers/spi/spi-bcm2835.c | 7 ++++++-
+ 1 file changed, 6 insertions(+), 1 deletion(-)
+
+--- a/drivers/spi/spi-bcm2835.c
++++ b/drivers/spi/spi-bcm2835.c
+@@ -150,6 +150,10 @@ static irqreturn_t bcm2835_spi_interrupt
+ 	struct spi_master *master = dev_id;
+ 	struct bcm2835_spi *bs = spi_master_get_devdata(master);
+ 
++	/* check if we got interrupt enabled */
++	if (!(bcm2835_rd(bs, BCM2835_SPI_CS) & BCM2835_SPI_CS_INTR))
++		return IRQ_NONE;
++
+ 	/* Read as many bytes as possible from FIFO */
+ 	bcm2835_rd_fifo(bs);
+ 	/* Write as many bytes as possible to FIFO */
+@@ -755,7 +759,8 @@ static int bcm2835_spi_probe(struct plat
+ 	bcm2835_wr(bs, BCM2835_SPI_CS,
+ 		   BCM2835_SPI_CS_CLEAR_RX | BCM2835_SPI_CS_CLEAR_TX);
+ 
+-	err = devm_request_irq(&pdev->dev, bs->irq, bcm2835_spi_interrupt, 0,
++	err = devm_request_irq(&pdev->dev, bs->irq, bcm2835_spi_interrupt,
++			       IRQF_SHARED,
+ 			       dev_name(&pdev->dev), master);
+ 	if (err) {
+ 		dev_err(&pdev->dev, "could not request IRQ: %d\n", err);