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authorMichael Hennerich <michael.hennerich@analog.com>2012-07-20 09:31:00 +0100
committerJonathan Cameron <jic23@kernel.org>2012-08-16 20:24:33 +0100
commit8857df3aceb7a8eb7558059b7da109e41dd1fb95 (patch)
treeba45e6d7779aab84f6a7c1ba37697d9914158b97 /include/linux/iio
parentdfffd0d65fdf16d034681716dcbea74776f62e40 (diff)
downloadop-kernel-dev-8857df3aceb7a8eb7558059b7da109e41dd1fb95.zip
op-kernel-dev-8857df3aceb7a8eb7558059b7da109e41dd1fb95.tar.gz
iio: frequency: ADF4350: Fix potential reference div factor overflow.
With small channel spacing values and high reference frequencies it is possible to exceed the range of the 10-bit counter. Workaround by checking the range and widening some constrains. We don't use the REG1_PHASE value in this case the datasheet recommends to set it to 1 if not used. Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Diffstat (limited to 'include/linux/iio')
-rw-r--r--include/linux/iio/frequency/adf4350.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/iio/frequency/adf4350.h b/include/linux/iio/frequency/adf4350.h
index b76b4a8..be91f34 100644
--- a/include/linux/iio/frequency/adf4350.h
+++ b/include/linux/iio/frequency/adf4350.h
@@ -87,6 +87,8 @@
#define ADF4350_MAX_BANDSEL_CLK 125000 /* Hz */
#define ADF4350_MAX_FREQ_REFIN 250000000 /* Hz */
#define ADF4350_MAX_MODULUS 4095
+#define ADF4350_MAX_R_CNT 1023
+
/**
* struct adf4350_platform_data - platform specific information
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