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| author | Sebastian Andrzej Siewior <bigeasy@linutronix.de> | 2010-11-22 17:12:14 -0800 |
|---|---|---|
| committer | Sebastian Andrzej Siewior <bigeasy@linutronix.de> | 2010-12-01 12:18:31 +0100 |
| commit | 49cbb1e0b6dcba9170e72fdf40c75fc24cadba4b (patch) | |
| tree | ad2b14d580fd4101b39b55761a6de5178a7c5d0a | |
| parent | fbd29a14af42d374ddce9c16ff5f7805e69c764f (diff) | |
| download | kernel_samsung_smdk4412-49cbb1e0b6dcba9170e72fdf40c75fc24cadba4b.tar.gz kernel_samsung_smdk4412-49cbb1e0b6dcba9170e72fdf40c75fc24cadba4b.tar.bz2 kernel_samsung_smdk4412-49cbb1e0b6dcba9170e72fdf40c75fc24cadba4b.zip | |
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>
| -rw-r--r-- | drivers/spi/pxa2xx_spi.c | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/drivers/spi/pxa2xx_spi.c b/drivers/spi/pxa2xx_spi.c index 4e169b579ef..1865c23f217 100644 --- a/drivers/spi/pxa2xx_spi.c +++ b/drivers/spi/pxa2xx_spi.c @@ -742,6 +742,18 @@ static irqreturn_t ssp_int(int irq, void *dev_id) { struct driver_data *drv_data = dev_id; void __iomem *reg = drv_data->ioaddr; + u32 sccr1_reg = read_SSCR1(reg); + u32 mask = drv_data->mask_sr; + u32 status; + + status = read_SSSR(reg); + + /* Ignore possible writes if we don't need to write */ + if (!(sccr1_reg & SSCR1_TIE)) + mask &= ~SSSR_TFS; + + if (!(status & mask)) + return IRQ_NONE; if (!drv_data->cur_msg) { @@ -1512,7 +1524,8 @@ static int __devinit pxa2xx_spi_probe(struct platform_device *pdev) drv_data->mask_sr = SSSR_TINT | SSSR_RFS | SSSR_TFS | SSSR_ROR; } - status = request_irq(ssp->irq, ssp_int, 0, dev_name(dev), drv_data); + status = request_irq(ssp->irq, ssp_int, IRQF_SHARED, dev_name(dev), + drv_data); if (status < 0) { dev_err(&pdev->dev, "cannot get IRQ %d\n", ssp->irq); goto out_error_master_alloc; |