i2c-pxa2xx: add support for shared IRQ handler

Sodaville has three of them on a single IRQ. IRQF_DISABLED is removed
because it is a NOP allready and scheduled for removal.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Dirk Brandewie <dirk.brandewie@gmail.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>

1 files changed, 8 insertions, 2 deletions

diff --git a/drivers/i2c/busses/i2c-pxa.c b/drivers/i2c/busses/i2c-pxa.c
index ab59b7e492ed..fa8dd2c634d9 100644
--- a/drivers/i2c/busses/i2c-pxa.c
+++ b/drivers/i2c/busses/i2c-pxa.c
@@ -956,11 +956,17 @@ static void i2c_pxa_irq_rxfull(struct pxa_i2c *i2c, u32 isr)
         writel(icr, _ICR(i2c));
 }
 
+#define VALID_INT_SOURCE        (ISR_SSD | ISR_ALD | ISR_ITE | ISR_IRF | \
+                                ISR_SAD | ISR_BED)
 static irqreturn_t i2c_pxa_handler(int this_irq, void *dev_id)
 {
         struct pxa_i2c *i2c = dev_id;
         u32 isr = readl(_ISR(i2c));
 
+        isr &= VALID_INT_SOURCE;
+        if (!isr)
+                return IRQ_NONE;
+
         if (i2c_debug > 2 && 0) {
                 dev_dbg(&i2c->adap.dev, "%s: ISR=%08x, ICR=%08x, IBMR=%02x\n",
                         __func__, isr, readl(_ICR(i2c)), readl(_IBMR(i2c)));
@@ -975,7 +981,7 @@ static irqreturn_t i2c_pxa_handler(int this_irq, void *dev_id)
         /*
          * Always clear all pending IRQs.
          */
-        writel(isr & (ISR_SSD|ISR_ALD|ISR_ITE|ISR_IRF|ISR_SAD|ISR_BED), _ISR(i2c));
+        writel(isr, _ISR(i2c));
 
         if (isr & ISR_SAD)
                 i2c_pxa_slave_start(i2c, isr);
@@ -1120,7 +1126,7 @@ static int i2c_pxa_probe(struct platform_device *dev)
                 i2c->adap.algo = &i2c_pxa_pio_algorithm;
         } else {
                 i2c->adap.algo = &i2c_pxa_algorithm;
-                ret = request_irq(irq, i2c_pxa_handler, IRQF_DISABLED,
+                ret = request_irq(irq, i2c_pxa_handler, IRQF_SHARED,
                                   i2c->adap.name, i2c);
                 if (ret)
                         goto ereqirq;