[PATCH v1 2/4] spi: Support suppress_override_attrs flag

[Andy Shevchenko <andriy.shevchenko@linux.intel.com>]

Some device driver may want to suppress the driver_override sysfs attribute
by specifying a certain flag in their struct device_driver. Since SPI uses
explicit attribute instantiation, add that support here.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
---
 drivers/spi/spi.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c
index 5f57de24b9f7..40e738f8cbb7 100644
--- a/drivers/spi/spi.c
+++ b/drivers/spi/spi.c
@@ -214,8 +214,19 @@ static struct attribute *spi_dev_attrs[] = {
 	NULL,
 };
 
+static umode_t spi_dev_attr_is_visible(struct kobject *kobj, struct attribute *attr, int i)
+{
+	struct device *dev = kobj_to_dev(kobj);
+
+	if (attr == &dev_attr_driver_override.attr)
+		return dev->driver->suppress_override_attrs ? 0 : attr->mode;
+
+	return attr->mode;
+}
+
 static const struct attribute_group spi_dev_group = {
 	.attrs  = spi_dev_attrs,
+	.is_visible	= spi_dev_attr_is_visible,
 };
 
 static struct attribute *spi_device_statistics_attrs[] = {
-- 
2.50.1