On 02/11/2020 08:54, Yejune Deng wrote:
Some dts hasn't no reset node, is should ok.
Signed-off-by: Yejune Deng <yejune.d...@gmail.com>
---
drivers/gpu/drm/panfrost/panfrost_device.c | 10 ++++++++--
1 file changed, 8 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/panfrost/panfrost_device.c
b/drivers/gpu/drm/panfrost/panfrost_device.c
index ea8d318..a982878 100644
--- a/drivers/gpu/drm/panfrost/panfrost_device.c
+++ b/drivers/gpu/drm/panfrost/panfrost_device.c
@@ -18,7 +18,12 @@
static int panfrost_reset_init(struct panfrost_device *pfdev)
{
- pfdev->rstc = devm_reset_control_array_get(pfdev->dev, false, true);
+ pfdev->rstc =
devm_reset_control_array_get_optional_exclusive(pfdev->dev);
This change is fine - it should have no functional change and makes the
code more readable.
+ if (!pfdev->rstc) {
+ dev_info(pfdev->dev, "reset does not exist\n");
I don't think this output is particularly useful.
+ return 0;
The early return isn't necessary. IS_ERR(NULL) is false, and
reset_control_deassert() deals fine with NULL, so the path below would
be fine.
+ }
+
if (IS_ERR(pfdev->rstc)) {
dev_err(pfdev->dev, "get reset failed %ld\n",
PTR_ERR(pfdev->rstc));
return PTR_ERR(pfdev->rstc);
@@ -29,7 +34,8 @@ static int panfrost_reset_init(struct panfrost_device *pfdev)
static void panfrost_reset_fini(struct panfrost_device *pfdev)
{
- reset_control_assert(pfdev->rstc);
+ if (pfdev->rstc)
+ reset_control_assert(pfdev->rstc);
reset_control_assert() deals fine with a NULL input, so this is unneeded.
}
static int panfrost_clk_init(struct panfrost_device *pfdev)
Have you actually seen a problem on a platform without a reset node - it
works fine for me and I can't see any functional change with this patch.
Steve
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