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spi/pxa2xx: add support for shared IRQ handler
This is required in case the interrupt line is shared with other devices. Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Dirk Brandewie <dirk.brandewie@gmail.com>
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@ -742,6 +742,18 @@ static irqreturn_t ssp_int(int irq, void *dev_id)
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{
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struct driver_data *drv_data = dev_id;
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void __iomem *reg = drv_data->ioaddr;
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u32 sccr1_reg = read_SSCR1(reg);
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u32 mask = drv_data->mask_sr;
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u32 status;
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status = read_SSSR(reg);
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/* Ignore possible writes if we don't need to write */
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if (!(sccr1_reg & SSCR1_TIE))
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mask &= ~SSSR_TFS;
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if (!(status & mask))
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return IRQ_NONE;
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if (!drv_data->cur_msg) {
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@ -1512,7 +1524,8 @@ static int __devinit pxa2xx_spi_probe(struct platform_device *pdev)
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drv_data->mask_sr = SSSR_TINT | SSSR_RFS | SSSR_TFS | SSSR_ROR;
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}
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status = request_irq(ssp->irq, ssp_int, 0, dev_name(dev), drv_data);
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status = request_irq(ssp->irq, ssp_int, IRQF_SHARED, dev_name(dev),
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drv_data);
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if (status < 0) {
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dev_err(&pdev->dev, "cannot get IRQ %d\n", ssp->irq);
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goto out_error_master_alloc;
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