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From 21dd7cd6dc231287b92a8c8b9ecf9d0844c2d325 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] 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 */
@@ -756,7 +760,8 @@ 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);
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