2020-02-29 08:25:20 +00:00
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From ac94635b678715af00a685ada0a1b60dfb54c771 Mon Sep 17 00:00:00 2001
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From: Martin Sperl <kernel@martin.sperl.org>
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Date: Mon, 13 May 2019 11:05:27 +0000
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Subject: [PATCH] spi: bcm2835: enable shared interrupt support
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Add shared interrupt support for this driver.
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Signed-off-by: Martin Sperl <kernel@martin.sperl.org>
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---
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drivers/spi/spi-bcm2835.c | 7 ++++++-
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1 file changed, 6 insertions(+), 1 deletion(-)
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--- a/drivers/spi/spi-bcm2835.c
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+++ b/drivers/spi/spi-bcm2835.c
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@@ -379,6 +379,10 @@ static irqreturn_t bcm2835_spi_interrupt
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if (bs->tx_len && cs & BCM2835_SPI_CS_DONE)
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bcm2835_wr_fifo_blind(bs, BCM2835_SPI_FIFO_SIZE);
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+ /* check if we got interrupt enabled */
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+ if (!(bcm2835_rd(bs, BCM2835_SPI_CS) & BCM2835_SPI_CS_INTR))
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+ return IRQ_NONE;
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+
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/* Read as many bytes as possible from FIFO */
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bcm2835_rd_fifo(bs);
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/* Write as many bytes as possible to FIFO */
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2020-12-02 11:45:04 +00:00
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@@ -1330,7 +1334,8 @@ static int bcm2835_spi_probe(struct plat
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2020-02-29 08:25:20 +00:00
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bcm2835_wr(bs, BCM2835_SPI_CS,
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BCM2835_SPI_CS_CLEAR_RX | BCM2835_SPI_CS_CLEAR_TX);
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- err = devm_request_irq(&pdev->dev, bs->irq, bcm2835_spi_interrupt, 0,
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+ err = devm_request_irq(&pdev->dev, bs->irq, bcm2835_spi_interrupt,
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+ IRQF_SHARED,
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dev_name(&pdev->dev), ctlr);
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if (err) {
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dev_err(&pdev->dev, "could not request IRQ: %d\n", err);
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