From: Zubair Lutfullah <zubair.lutfullah@gmail.com>
To: jic23@cam.ac.uk
Cc: gregkh@linuxfoundation.org, linux-iio@vger.kernel.org,
linux-kernel@vger.kernel.org, koen@dominion.thruhere.net
Subject: [PATCH 07/15] iio: ti_am335x_adc: Handle set to clear IRQSTATUS
Date: Thu, 18 Jul 2013 23:21:18 +0100 [thread overview]
Message-ID: <1374186086-5015-8-git-send-email-zubair.lutfullah@gmail.com> (raw)
In-Reply-To: <1374186086-5015-1-git-send-email-zubair.lutfullah@gmail.com>
From: Russ Dill <Russ.Dill@ti.com>
The driver is currently mishandling the IRQSTATUS register by peforming
a read/update/write cycle. The actual functionality of the register is as follows:
Write 0 = No action.
Read 0 = No (enabled) event pending.
Read 1 = Event pending.
Write 1 = Clear (raw) event.
By reading the status and writing it back, the driver is clearing
all pending events, not just the one indicated in the bitmask.
Signed-off-by: Russ Dill <Russ.Dill@ti.com>
Signed-off-by: Zubair Lutfullah <zubair.lutfullah@gmail.com>
---
drivers/iio/adc/ti_am335x_adc.c | 11 ++++-------
1 file changed, 4 insertions(+), 7 deletions(-)
diff --git a/drivers/iio/adc/ti_am335x_adc.c b/drivers/iio/adc/ti_am335x_adc.c
index b566e6a..1c47818 100644
--- a/drivers/iio/adc/ti_am335x_adc.c
+++ b/drivers/iio/adc/ti_am335x_adc.c
@@ -178,7 +178,7 @@ static irqreturn_t tiadc_irq(int irq, void *private)
wake_up_interruptible(&adc_dev->wq_data_avail);
}
tiadc_writel(adc_dev, REG_IRQSTATUS,
- (status | IRQENB_FIFO1THRES));
+ IRQENB_FIFO1THRES);
return IRQ_HANDLED;
} else if ((status & IRQENB_FIFO1OVRRUN) ||
(status & IRQENB_FIFO1UNDRFLW)) {
@@ -186,12 +186,9 @@ static irqreturn_t tiadc_irq(int irq, void *private)
config &= ~(CNTRLREG_TSCSSENB);
tiadc_writel(adc_dev, REG_CTRL, config);
- if (status & IRQENB_FIFO1UNDRFLW)
- tiadc_writel(adc_dev, REG_IRQSTATUS,
- (status | IRQENB_FIFO1UNDRFLW));
- else
- tiadc_writel(adc_dev, REG_IRQSTATUS,
- (status | IRQENB_FIFO1OVRRUN));
+ tiadc_writel(adc_dev, REG_IRQSTATUS,
+ IRQENB_FIFO1OVRRUN |
+ IRQENB_FIFO1UNDRFLW);
tiadc_writel(adc_dev, REG_CTRL,
(config | CNTRLREG_TSCSSENB));
--
1.7.9.5
next prev parent reply other threads:[~2013-07-18 22:23 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-07-18 22:21 [PATCH 00/15] iio: ti_am335x_adc: Add continuous mode take 2 Zubair Lutfullah
2013-07-18 22:21 ` [PATCH 01/15] MFD: ti_tscadc: disable TSC config registers in adc mode Zubair Lutfullah
2013-07-18 22:45 ` Greg KH
2013-07-19 20:47 ` Zubair Lutfullah :
2013-07-19 23:13 ` Greg KH
2013-07-18 22:21 ` [PATCH 02/15] iio: ti_am335x_adc: Fix wrong samples received on 1st read Zubair Lutfullah
2013-07-20 10:52 ` Jonathan Cameron
2013-07-18 22:21 ` [PATCH 03/15] input: ti_tsc: Enable shared IRQ for TSC Zubair Lutfullah
2013-07-20 10:57 ` Jonathan Cameron
2013-07-20 10:58 ` Jonathan Cameron
2013-07-18 22:21 ` [PATCH 04/15] iio: mfd: input: ti_am335x_adc:Add support for continuous mode Zubair Lutfullah
2013-07-20 11:15 ` Jonathan Cameron
2013-07-18 22:21 ` [PATCH 05/15] MFD: ti_tscadc: ADC Clock check not required Zubair Lutfullah
2013-07-20 11:16 ` Jonathan Cameron
2013-07-18 22:21 ` [PATCH 06/15] iio: ti_am335x_adc: Handle set to clear IRQENABLE Zubair Lutfullah
2013-07-20 11:19 ` Jonathan Cameron
2013-07-18 22:21 ` Zubair Lutfullah [this message]
2013-07-18 22:21 ` [PATCH 08/15] iio: ti_am335x_adc: Handle overrun before threshold event Zubair Lutfullah
2013-07-20 11:21 ` Jonathan Cameron
2013-07-18 22:21 ` [PATCH 09/15] iio: ti_am335x_adc: Avoid double " Zubair Lutfullah
2013-07-18 22:21 ` [PATCH 10/15] iio: ti_am335x_adc: Also clear threshold event when clearing overrun event Zubair Lutfullah
2013-07-18 22:21 ` [PATCH 11/15] iio: ti_am335x_adc: Print error and handle short FIFO events Zubair Lutfullah
2013-07-18 22:21 ` [PATCH 12/15] iio: ti_am335x_adc: Fix allocation count of FIFO buffer Zubair Lutfullah
2013-07-18 22:21 ` [PATCH 13/15] iio: ti_am335x_adc: Fix capture operation during resume Zubair Lutfullah
2013-07-18 22:21 ` [PATCH 14/15] iio: ti_am335x_adc: Reset and clear overrun status before capture Zubair Lutfullah
2013-07-18 22:21 ` [PATCH 15/15] iio: ti_am335x_adc: Properly handle out of memory situation Zubair Lutfullah
2013-07-20 11:25 ` [PATCH 00/15] iio: ti_am335x_adc: Add continuous mode take 2 Jonathan Cameron
2013-07-20 12:47 ` Zubair Lutfullah :
2013-07-20 12:54 ` Lars-Peter Clausen
2013-07-20 13:50 ` Jonathan Cameron
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