From: Sebastian Andrzej Siewior <bigeasy-hfZtesqFncYOwBW4kG4KsQ@public.gmane.org>
To: spi-devel-general-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org
Cc: dbrownell-Rn4VEauK+AKRv+LV9MX5uipxlwaOVQ5f@public.gmane.org,
eric.y.miao-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org,
Sebastian Andrzej Siewior
<bigeasy-hfZtesqFncYOwBW4kG4KsQ@public.gmane.org>,
sodaville-hfZtesqFncYOwBW4kG4KsQ@public.gmane.org,
Dirk Brandewie
<dirk.brandewie-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
linux-lFZ/pmaqli7XmaaqVzeoHQ@public.gmane.org,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org
Subject: [PATCH 2/9] spi/pxa2xx: add support for shared IRQ handler
Date: Thu, 2 Dec 2010 18:47:30 +0100 [thread overview]
Message-ID: <1291312057-7933-3-git-send-email-bigeasy@linutronix.de> (raw)
In-Reply-To: <1291312057-7933-1-git-send-email-bigeasy-hfZtesqFncYOwBW4kG4KsQ@public.gmane.org>
This is required in case the interrupt line is shared with other
devices.
Signed-off-by: Sebastian Andrzej Siewior <bigeasy-hfZtesqFncYOwBW4kG4KsQ@public.gmane.org>
Signed-off-by: Dirk Brandewie <dirk.brandewie-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
---
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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next prev parent reply other threads:[~2010-12-02 17:47 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-12-02 17:47 SPI support for CE4100, v2 Sebastian Andrzej Siewior
[not found] ` <1291312057-7933-1-git-send-email-bigeasy-hfZtesqFncYOwBW4kG4KsQ@public.gmane.org>
2010-12-02 17:47 ` [PATCH 1/9] spi/pxa2xx: register driver properly Sebastian Andrzej Siewior
[not found] ` <1291312057-7933-2-git-send-email-bigeasy-hfZtesqFncYOwBW4kG4KsQ@public.gmane.org>
2010-12-29 8:11 ` Grant Likely
2010-12-29 17:00 ` David Brownell
2010-12-29 21:26 ` Sebastian Andrzej Siewior
[not found] ` <20101229212635.GA31347-Hfxr4Dq0UpYb1SvskN2V4Q@public.gmane.org>
2010-12-29 21:40 ` Grant Likely
[not found] ` <20101229214054.GB15198-MrY2KI0G/OVr83L8+7iqerDks+cytr/Z@public.gmane.org>
2010-12-30 1:55 ` David Brownell
[not found] ` <349566.41372.qm-g47maUHHHF+ORdMXk8NaZPu2YVrzzGjVVpNB7YpNyf8@public.gmane.org>
2010-12-29 21:36 ` Grant Likely
2010-12-02 17:47 ` Sebastian Andrzej Siewior [this message]
[not found] ` <1291312057-7933-3-git-send-email-bigeasy-hfZtesqFncYOwBW4kG4KsQ@public.gmane.org>
2010-12-29 8:11 ` [PATCH 2/9] spi/pxa2xx: add support for shared IRQ handler Grant Likely
2010-12-02 17:47 ` [PATCH 3/9] spi/pxa2xx: Use define for SSSR_TFL_MASK instead of plain numbers Sebastian Andrzej Siewior
[not found] ` <1291312057-7933-4-git-send-email-bigeasy-hfZtesqFncYOwBW4kG4KsQ@public.gmane.org>
2010-12-29 8:11 ` Grant Likely
2010-12-02 17:47 ` [PATCH 4/9] arm/pxa2xx: reorgazine SSP and SPI header files Sebastian Andrzej Siewior
[not found] ` <1291312057-7933-5-git-send-email-bigeasy-hfZtesqFncYOwBW4kG4KsQ@public.gmane.org>
2010-12-29 8:11 ` Grant Likely
2010-12-02 17:47 ` [PATCH 5/9] spi/pxa2xx: Add CE4100 support Sebastian Andrzej Siewior
[not found] ` <1291312057-7933-6-git-send-email-bigeasy-hfZtesqFncYOwBW4kG4KsQ@public.gmane.org>
2010-12-29 8:11 ` Grant Likely
2010-12-02 17:47 ` [PATCH 6/9] spi/pxa2xx: Consider CE4100's FIFO depth Sebastian Andrzej Siewior
[not found] ` <1291312057-7933-7-git-send-email-bigeasy-hfZtesqFncYOwBW4kG4KsQ@public.gmane.org>
2010-12-29 8:11 ` Grant Likely
2010-12-02 17:47 ` [PATCH 7/9] spi/pxa2xx: Add chipselect support for Sodaville Sebastian Andrzej Siewior
[not found] ` <1291312057-7933-8-git-send-email-bigeasy-hfZtesqFncYOwBW4kG4KsQ@public.gmane.org>
2010-12-29 8:11 ` Grant Likely
2010-12-02 17:47 ` [PATCH 8/9] spi/pxa2xx: Modify RX-Tresh instead of busy-loop for the remaining RX bytes Sebastian Andrzej Siewior
[not found] ` <1291312057-7933-9-git-send-email-bigeasy-hfZtesqFncYOwBW4kG4KsQ@public.gmane.org>
2010-12-29 8:12 ` Grant Likely
2010-12-02 17:47 ` [PATCH 9/9] spi/pxa2xx: pass of_node to spi device and set a parent device Sebastian Andrzej Siewior
[not found] ` <1291312057-7933-10-git-send-email-bigeasy-hfZtesqFncYOwBW4kG4KsQ@public.gmane.org>
2010-12-29 8:11 ` Grant Likely
2010-12-09 16:43 ` [sodaville] SPI support for CE4100, v2 Sebastian Andrzej Siewior
[not found] ` <4D01074A.2020106-hfZtesqFncYOwBW4kG4KsQ@public.gmane.org>
2010-12-29 8:10 ` Grant Likely
-- strict thread matches above, loose matches on Subject: below --
2010-11-24 11:13 SPI support for Sodaville Sebastian Andrzej Siewior
[not found] ` <1290597207-29838-1-git-send-email-bigeasy-hfZtesqFncYOwBW4kG4KsQ@public.gmane.org>
2010-11-24 11:13 ` [PATCH 2/9] spi/pxa2xx: add support for shared IRQ handler Sebastian Andrzej Siewior
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