[PTCH -next] staging/iio: fix ring buffer build

[Randy Dunlap <randy.dunlap@oracle.com>]

From: Randy Dunlap <randy.dunlap@oracle.com>

max1363 uses both the iio hardware ring buffer and software
ring buffer interfaces, but its Makefile and Kconfig do not
reflect that usage, so its build breaks.  Add a new Kconfig
symbol to reflect that usage and change max1363.h & Makefile
to use the new Kconfig symbol.

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Cc: Jonathan Cameron <jic23@cam.ac.uk>
---
 drivers/staging/iio/adc/Kconfig   |    9 +++++++++
 drivers/staging/iio/adc/Makefile  |    2 +-
 drivers/staging/iio/adc/max1363.h |    6 +++---
 3 files changed, 13 insertions(+), 4 deletions(-)

--- linux-next-20091109.orig/drivers/staging/iio/adc/Kconfig
+++ linux-next-20091109/drivers/staging/iio/adc/Kconfig
@@ -12,3 +12,12 @@ config MAX1363
 	  convertors (ADC). (max1361, max1362, max1363, max1364, max1136,
 	  max1136, max1137, max1138, max1139, max1236, max1237, max11238,
 	  max1239) Provides direct access via sysfs.
+
+config MAX1363_RING_BUFFER
+	bool "MAXIM max1363: use ring buffer"
+	depends on MAX1363
+	select IIO_RING_BUFFER
+	select IIO_SW_RING
+	help
+	  Say yes here to include ring buffer support in the MAX1363
+	  ADC driver.
--- linux-next-20091109.orig/drivers/staging/iio/adc/Makefile
+++ linux-next-20091109/drivers/staging/iio/adc/Makefile
@@ -3,6 +3,6 @@
 #
 
 max1363-y := max1363_core.o
-max1363-$(CONFIG_IIO_RING_BUFFER) += max1363_ring.o
+max1363-$(CONFIG_MAX1363_RING_BUFFER) += max1363_ring.o
 
 obj-$(CONFIG_MAX1363) += max1363.o
--- linux-next-20091109.orig/drivers/staging/iio/adc/max1363.h
+++ linux-next-20091109/drivers/staging/iio/adc/max1363.h
@@ -228,7 +228,7 @@ struct max1363_state {
 	struct iio_trigger		*trig;
 	struct regulator		*reg;
 };
-#ifdef CONFIG_IIO_RING_BUFFER
+#ifdef CONFIG_MAX1363_RING_BUFFER
 
 ssize_t max1363_scan_from_ring(struct device *dev,
 			       struct device_attribute *attr,
@@ -239,7 +239,7 @@ void max1363_ring_cleanup(struct iio_dev
 int max1363_initialize_ring(struct iio_ring_buffer *ring);
 void max1363_uninitialize_ring(struct iio_ring_buffer *ring);
 
-#else /* CONFIG_IIO_RING_BUFFER */
+#else /* CONFIG_MAX1363_RING_BUFFER */
 
 static inline void max1363_uninitialize_ring(struct iio_ring_buffer *ring)
 {
@@ -265,5 +265,5 @@ max1363_register_ring_funcs_and_init(str
 };
 
 static inline void max1363_ring_cleanup(struct iio_dev *indio_dev) {};
-#endif /* CONFIG_IIO_RING_BUFFER */
+#endif /* CONFIG_MAX1363_RING_BUFFER */
 #endif /* _MAX1363_H_ */