[PATCH v5 8/8] firmware: arm_scpi: add support for legacy SCPI compatible

[sudeep.holla@arm.com (Sudeep Holla)]

This patch adds new DT match table to setup the support for legacy SCPI
protocol. It aldo adds "arm,legacy-scpi" to the legacy match entry.

Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
---
 drivers/firmware/arm_scpi.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/firmware/arm_scpi.c b/drivers/firmware/arm_scpi.c
index 902233642bd3..a38e1537fb8e 100644
--- a/drivers/firmware/arm_scpi.c
+++ b/drivers/firmware/arm_scpi.c
@@ -871,6 +871,11 @@ static int scpi_alloc_xfer_list(struct device *dev, struct scpi_chan *ch)
 	return 0;
 }
 
+static const struct of_device_id legacy_scpi_of_match[] = {
+	{.compatible = "arm,legacy-scpi"},
+	{},
+};
+
 static int scpi_probe(struct platform_device *pdev)
 {
 	int count, idx, ret;
@@ -883,6 +888,9 @@ static int scpi_probe(struct platform_device *pdev)
 	if (!scpi_info)
 		return -ENOMEM;
 
+	if (of_match_device(legacy_scpi_of_match, &pdev->dev))
+		scpi_info->is_legacy = true;
+
 	count = of_count_phandle_with_args(np, "mboxes", "#mbox-cells");
 	if (count < 0) {
 		dev_err(dev, "no mboxes property in '%s'\n", np->full_name);
@@ -984,6 +992,7 @@ static int scpi_probe(struct platform_device *pdev)
 
 static const struct of_device_id scpi_of_match[] = {
 	{.compatible = "arm,scpi"},
+	{.compatible = "arm,legacy-scpi"},
 	{},
 };
 
-- 
1.9.1