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greybus: loopback: use separate attribute macro for average

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Define a separate macro for displaying the average of the samples
collected.  This will be used so we can calculate the average only
when requested, rather than every time a new value gets recorded.

Signed-off-by: Alex Elder <elder@linaro.org>
Reviewed-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
This commit is contained in:
Alex Elder 2015-08-03 12:57:18 -05:00 committed by Greg Kroah-Hartman
parent 19c2a443c9
commit 7a135a965c
1 changed files with 12 additions and 1 deletions
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13
drivers/staging/greybus/loopback.c
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@ -100,10 +100,21 @@ static ssize_t name##_##field##_show(struct device *dev, \
} \
static DEVICE_ATTR_RO(name##_##field)
#define gb_loopback_ro_avg_attr(name) \
static ssize_t name##_avg_show(struct device *dev, \
struct device_attribute *attr, \
char *buf) \
{ \
struct gb_connection *connection = to_gb_connection(dev); \
struct gb_loopback *gb = connection->private; \
return sprintf(buf, "%llu\n", gb->name.avg); \
} \
static DEVICE_ATTR_RO(name##_avg)
#define gb_loopback_stats_attrs(field) \
gb_loopback_ro_stats_attr(field, min, u); \
gb_loopback_ro_stats_attr(field, max, u); \
gb_loopback_ro_stats_attr(field, avg, llu);
gb_loopback_ro_avg_attr(field);
#define gb_loopback_attr(field, type) \
static ssize_t field##_show(struct device *dev, \