Currently, HCCS driver directly uses Generic Communications Channel Shared
Memory Region which is used in type0/1/2 to communicate with platform,
but actually doesn't support type3/4/5.
So this patch adds the check for PCC subspace type.
Signed-off-by: Huisong Li <lihuisong@xxxxxxxxxx>
---
drivers/soc/hisilicon/kunpeng_hccs.c | 17 +++++++++++++++++
1 file changed, 17 insertions(+)
diff --git a/drivers/soc/hisilicon/kunpeng_hccs.c b/drivers/soc/hisilicon/kunpeng_hccs.c
index f3810d9d1caa..4ba3bfd45a01 100644
--- a/drivers/soc/hisilicon/kunpeng_hccs.c
+++ b/drivers/soc/hisilicon/kunpeng_hccs.c
@@ -174,6 +174,19 @@ static int hccs_register_pcc_channel(struct hccs_dev *hdev)
return rc;
}
+static int hccs_check_pcc_info(struct hccs_dev *hdev)
+{
+ struct pcc_mbox_chan *pcc_chan = hdev->cl_info.pcc_chan;
+
+ if (pcc_chan->type >= ACPI_PCCT_TYPE_EXT_PCC_MASTER_SUBSPACE) {
+ dev_err(hdev->dev, "unsupport for subspace type%u.\n",
+ pcc_chan->type);
+ return -EOPNOTSUPP;
+ }
+
+ return 0;
+}
+
static int hccs_check_chan_cmd_complete(struct hccs_dev *hdev)
{
struct hccs_mbox_client_info *cl_info = &hdev->cl_info;
@@ -1224,6 +1237,10 @@ static int hccs_probe(struct platform_device *pdev)
if (rc)
return rc;
+ rc = hccs_check_pcc_info(hdev);
+ if (rc)
+ goto unregister_pcc_chan;
+
rc = hccs_get_dev_caps(hdev);
if (rc)
goto unregister_pcc_chan;
--
2.33.0
