[PATCH 2/9] spi/pxa2xx: add support for shared IRQ handler

[Grant Likely]

On Thu, Dec 02, 2010 at 06:47:30PM +0100, Sebastian Andrzej Siewior wrote:
> This is required in case the interrupt line is shared with other
> devices.
> 
> Signed-off-by: Sebastian Andrzej Siewior <bigeasy at linutronix.de>
> Signed-off-by: Dirk Brandewie <dirk.brandewie at gmail.com>

picked up for -next via merge

g.

> ---
>  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 4e169b5..1865c23 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;
> -- 
> 1.7.3.2
> 
> 
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