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i2c: xiic: Service all interrupts in isr 

Currently only one interrupt is serviced in the isr.
In case the multiple interrupts happen simultenously we service and ack
only one of them. Check for all the causes in the isr and service them.

Signed-off-by: Shubhrajyoti Datta <shubhraj@xilinx.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
This commit is contained in:
Shubhrajyoti Datta 2015-06-17 20:48:18 +05:30 committed by Wolfram Sang
parent 542e2a9b73
commit 7f9906bd7f
1 changed files with 10 additions and 14 deletions
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24
drivers/i2c/busses/i2c-xiic.c
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@ -401,11 +401,11 @@ static irqreturn_t xiic_process(int irq, void *dev_id)
if (i2c->tx_msg)
xiic_wakeup(i2c, STATE_ERROR);
} else if (pend & XIIC_INTR_RX_FULL_MASK) {
}
if (pend & XIIC_INTR_RX_FULL_MASK) {
/* Receive register/FIFO is full */
clr = XIIC_INTR_RX_FULL_MASK;
clr |= XIIC_INTR_RX_FULL_MASK;
if (!i2c->rx_msg) {
dev_dbg(i2c->adap.dev.parent,
"%s unexpexted RX IRQ\n", __func__);
@ -438,9 +438,10 @@ static irqreturn_t xiic_process(int irq, void *dev_id)
__xiic_start_xfer(i2c);
}
}
} else if (pend & XIIC_INTR_BNB_MASK) {
}
if (pend & XIIC_INTR_BNB_MASK) {
/* IIC bus has transitioned to not busy */
clr = XIIC_INTR_BNB_MASK;
clr |= XIIC_INTR_BNB_MASK;
/* The bus is not busy, disable BusNotBusy interrupt */
xiic_irq_dis(i2c, XIIC_INTR_BNB_MASK);
@ -453,12 +454,12 @@ static irqreturn_t xiic_process(int irq, void *dev_id)
xiic_wakeup(i2c, STATE_DONE);
else
xiic_wakeup(i2c, STATE_ERROR);
} else if (pend & (XIIC_INTR_TX_EMPTY_MASK | XIIC_INTR_TX_HALF_MASK)) {
}
if (pend & (XIIC_INTR_TX_EMPTY_MASK | XIIC_INTR_TX_HALF_MASK)) {
/* Transmit register/FIFO is empty or ½ empty */
clr = pend &
(XIIC_INTR_TX_EMPTY_MASK | XIIC_INTR_TX_HALF_MASK);
clr |= (pend &
(XIIC_INTR_TX_EMPTY_MASK | XIIC_INTR_TX_HALF_MASK));
if (!i2c->tx_msg) {
dev_dbg(i2c->adap.dev.parent,
@ -489,11 +490,6 @@ static irqreturn_t xiic_process(int irq, void *dev_id)
* make sure to disable tx half
*/
xiic_irq_dis(i2c, XIIC_INTR_TX_HALF_MASK);
} else {
/* got IRQ which is not acked */
dev_err(i2c->adap.dev.parent, "%s Got unexpected IRQ\n",
__func__);
clr = pend;
}
out:
dev_dbg(i2c->adap.dev.parent, "%s clr: 0x%x\n", __func__, clr);