drm/komeda: Add sysfs attribute: core_id and config_id

Add two sysfs node: core_id, config_id, user can read them to fetch the
HW product information.

Also, use memset to initialize config_id, rather than quirky C syntax.
Courtesy of Nathan Chancellor <natechancellor@gmail.com>.

Signed-off-by: James Qian Wang (Arm Technology China) <james.qian.wang@arm.com>
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
[Merged Nathan's patch that uses memset to initialize config_id into
original patch as the fixes tag changed due to rebase, reworded the
commit to reference the merged patch]
Signed-off-by: Liviu Dudau <liviu.dudau@arm.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_drv.c b/drivers/gpu/drm/arm/display/komeda/komeda_drv.c
index 2bdd189b041d..0285fd37a016 100644
--- a/drivers/gpu/drm/arm/display/komeda/komeda_drv.c
+++ b/drivers/gpu/drm/arm/display/komeda/komeda_drv.c
@@ -17,6 +17,13 @@ struct komeda_drv {
 	struct komeda_kms_dev *kms;
 };
 
+struct komeda_dev *dev_to_mdev(struct device *dev)
+{
+	struct komeda_drv *mdrv = dev_get_drvdata(dev);
+
+	return mdrv ? mdrv->mdev : NULL;
+}
+
 static void komeda_unbind(struct device *dev)
 {
 	struct komeda_drv *mdrv = dev_get_drvdata(dev);