From f28cdd5936db41168ed21fcd02894f800aa83362 Mon Sep 17 00:00:00 2001 From: Martin Sperl Date: Mon, 13 May 2019 11:05:27 +0000 Subject: [PATCH 550/782] spi: bcm2835: enable shared interrupt support Add shared interrupt support for this driver. Signed-off-by: Martin Sperl --- 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);