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authorUwe Kleine-König <u.kleine-koenig@pengutronix.de>2010-03-05 13:44:29 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2010-03-06 11:26:47 -0800
commit86c3400810a7a33e176bf33b6b074d881e829374 (patch)
tree4342159d7e552078151c5a87a72cd29c5a4aabd8
parent4dd4dd655cedb7c5c0bf45bc1d012ebbe21e8319 (diff)
downloadop-kernel-dev-86c3400810a7a33e176bf33b6b074d881e829374.zip
op-kernel-dev-86c3400810a7a33e176bf33b6b074d881e829374.tar.gz
mfd/mc13783: new function reading irq mask and status register
The driver for the mc13783 rtc needs to know if the TODA irq is pending. Instead of tracking in the rtc driver if the irq is enabled provide that information, too. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Cc: Alessandro Zummo <a.zummo@towertech.it> Cc: Paul Gortmaker <p_gortmaker@yahoo.com> Cc: Valentin Longchamp <valentin.longchamp@epfl.ch> Cc: Sascha Hauer <s.hauer@pengutronix.de> Cc: Samuel Ortiz <sameo@linux.intel.com> Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com> Cc: Luotao Fu <l.fu@pengutronix.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--drivers/mfd/mc13783-core.c35
-rw-r--r--include/linux/mfd/mc13783.h2
2 files changed, 37 insertions, 0 deletions
diff --git a/drivers/mfd/mc13783-core.c b/drivers/mfd/mc13783-core.c
index a2bd445..62a847e 100644
--- a/drivers/mfd/mc13783-core.c
+++ b/drivers/mfd/mc13783-core.c
@@ -269,6 +269,41 @@ int mc13783_irq_unmask(struct mc13783 *mc13783, int irq)
}
EXPORT_SYMBOL(mc13783_irq_unmask);
+int mc13783_irq_status(struct mc13783 *mc13783, int irq,
+ int *enabled, int *pending)
+{
+ int ret;
+ unsigned int offmask = irq < 24 ? MC13783_IRQMASK0 : MC13783_IRQMASK1;
+ unsigned int offstat = irq < 24 ? MC13783_IRQSTAT0 : MC13783_IRQSTAT1;
+ u32 irqbit = 1 << (irq < 24 ? irq : irq - 24);
+
+ if (irq < 0 || irq >= MC13783_NUM_IRQ)
+ return -EINVAL;
+
+ if (enabled) {
+ u32 mask;
+
+ ret = mc13783_reg_read(mc13783, offmask, &mask);
+ if (ret)
+ return ret;
+
+ *enabled = mask & irqbit;
+ }
+
+ if (pending) {
+ u32 stat;
+
+ ret = mc13783_reg_read(mc13783, offstat, &stat);
+ if (ret)
+ return ret;
+
+ *pending = stat & irqbit;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL(mc13783_irq_status);
+
int mc13783_irq_ack(struct mc13783 *mc13783, int irq)
{
unsigned int offstat = irq < 24 ? MC13783_IRQSTAT0 : MC13783_IRQSTAT1;
diff --git a/include/linux/mfd/mc13783.h b/include/linux/mfd/mc13783.h
index b8b9f3b..8895d9d 100644
--- a/include/linux/mfd/mc13783.h
+++ b/include/linux/mfd/mc13783.h
@@ -29,6 +29,8 @@ int mc13783_irq_free(struct mc13783 *mc13783, int irq, void *dev);
int mc13783_irq_mask(struct mc13783 *mc13783, int irq);
int mc13783_irq_unmask(struct mc13783 *mc13783, int irq);
+int mc13783_irq_status(struct mc13783 *mc13783, int irq,
+ int *enabled, int *pending);
int mc13783_irq_ack(struct mc13783 *mc13783, int irq);
static inline int mc13783_mask(struct mc13783 *mc13783, int irq) __deprecated;
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