If implementation to perform self-test/reset has not been provided by the
platform code hide 'selftest' sysfs attribute instead of returning error
when someone tries to use it.
Signed-off-by: Dmitry Torokhov <dtor@xxxxxxx>
---
drivers/input/touchscreen/tsc2005.c | 46 +++++++++++++++++++++--------------
1 files changed, 28 insertions(+), 18 deletions(-)
diff --git a/drivers/input/touchscreen/tsc2005.c b/drivers/input/touchscreen/tsc2005.c
index d7ea906..4f1c041 100644
--- a/drivers/input/touchscreen/tsc2005.c
+++ b/drivers/input/touchscreen/tsc2005.c
@@ -411,13 +411,6 @@ static ssize_t tsc2005_selftest_show(struct device *dev,
u16 temp_high_test;
unsigned int result;
- if (!ts->set_reset) {
- dev_warn(&ts->spi->dev,
- "unable to selftest: no reset function\n");
- result = 0;
- goto out;
- }
-
mutex_lock(&ts->mutex);
/*
@@ -451,11 +444,38 @@ static ssize_t tsc2005_selftest_show(struct device *dev,
mutex_unlock(&ts->mutex);
-out:
return sprintf(buf, "%u\n", result);
}
+
static DEVICE_ATTR(selftest, S_IRUGO, tsc2005_selftest_show, NULL);
+static struct attribute *tsc2005_attrs[] = {
+ &dev_attr_disable.attr,
+ &dev_attr_selftest.attr,
+ NULL
+};
+
+static mode_t tsc2005_attr_is_visible(struct kobject *kobj,
+ struct attribute *attr, int n)
+{
+ struct device *dev = container_of(kobj, struct device, kobj);
+ struct spi_device *spi = to_spi_device(dev);
+ struct tsc2005 *ts = spi_get_drvdata(spi);
+ mode_t mode = attr->mode;
+
+ if (attr == &dev_attr_selftest.attr) {
+ if (!ts->set_reset)
+ mode = 0;
+ }
+
+ return mode;
+}
+
+static const struct attribute_group tsc2005_attr_group = {
+ .is_visible = tsc2005_attr_is_visible,
+ .attrs = tsc2005_attrs,
+};
+
static void tsc2005_esd_timer(unsigned long data)
{
struct tsc2005 *ts = (struct tsc2005 *)data;
@@ -495,16 +515,6 @@ out:
mutex_unlock(&ts->mutex);
}
-static struct attribute *tsc2005_attrs[] = {
- &dev_attr_disable.attr,
- &dev_attr_selftest.attr,
- NULL
-};
-
-static struct attribute_group tsc2005_attr_group = {
- .attrs = tsc2005_attrs,
-};
-
static void __devinit tsc2005_setup_spi_xfer(struct tsc2005 *ts)
{
tsc2005_setup_read(&ts->spi_x, TSC2005_REG_X, 0);
--
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