GCE cannot know the register base address, we store the subsys-base address
relationship in the device node, and store the relationship by
cmdq_register_device function.

Signed-off-by: Bibby Hsieh <redacted>
---
 drivers/soc/mediatek/mtk-cmdq-helper.c | 24 ++++++++++++++++++++++++
 include/linux/soc/mediatek/mtk-cmdq.h  |  1 +
 2 files changed, 25 insertions(+)

diff --git a/drivers/soc/mediatek/mtk-cmdq-helper.c b/drivers/soc/mediatek/mtk-cmdq-helper.c
index 6e4b85e..6ad997f 100644
--- a/drivers/soc/mediatek/mtk-cmdq-helper.c
+++ b/drivers/soc/mediatek/mtk-cmdq-helper.c

@@ -32,6 +32,30 @@ u8 cmdq_subsys_base_to_id(struct cmdq_base *clt_base, u32 base)
 }
 EXPORT_SYMBOL(cmdq_subsys_base_to_id);
 
+struct cmdq_base *cmdq_register_device(struct device *dev)
+{
+	struct cmdq_base *clt_base;
+	struct of_phandle_args spec;
+	u32 idx;
+
+	clt_base = devm_kzalloc(dev, sizeof(*clt_base), GFP_KERNEL);
+	if (!clt_base)
+		return NULL;
+
+	/* parse subsys */
+	for (idx = 0; idx < ARRAY_SIZE(clt_base->subsys); idx++) {
+		if (of_parse_phandle_with_args(dev->of_node, "gce-subsys",
+		    "#gce-subsys-cells", idx, &spec))
+			break;
+		clt_base->subsys[idx].base = spec.args[0];
+		clt_base->subsys[idx].id = spec.args[1];

+	}
+	clt_base->count = idx;
+
+	return clt_base;
+}
+EXPORT_SYMBOL(cmdq_register_device);
+
 static void cmdq_client_timeout(struct timer_list *t)
 {
 	struct cmdq_client *client = from_timer(client, t, timer);

diff --git a/include/linux/soc/mediatek/mtk-cmdq.h b/include/linux/soc/mediatek/mtk-cmdq.h
index 0c7a6ee..a1f5eb6 100644
--- a/include/linux/soc/mediatek/mtk-cmdq.h
+++ b/include/linux/soc/mediatek/mtk-cmdq.h

@@ -138,5 +138,6 @@ int cmdq_pkt_flush_async(struct cmdq_pkt *pkt, cmdq_async_flush_cb cb,
 int cmdq_pkt_flush(struct cmdq_pkt *pkt);
 
 u8 cmdq_subsys_base_to_id(struct cmdq_base *clt_base, u32 base);
+struct cmdq_base *cmdq_register_device(struct device *dev);
 
 #endif	/* __MTK_CMDQ_H__ */