GCE cannot know the register base address, this function
can help cmdq client to get the cmdq_client_reg structure.
Signed-off-by: Bibby Hsieh <bibby.hsieh@xxxxxxxxxxxx>
---
drivers/soc/mediatek/mtk-cmdq-helper.c | 25 +++++++++++++++++++++++++
include/linux/soc/mediatek/mtk-cmdq.h | 18 ++++++++++++++++++
2 files changed, 43 insertions(+)
diff --git a/drivers/soc/mediatek/mtk-cmdq-helper.c b/drivers/soc/mediatek/mtk-cmdq-helper.c
index 70ad4d806fac..815845bb5982 100644
--- a/drivers/soc/mediatek/mtk-cmdq-helper.c
+++ b/drivers/soc/mediatek/mtk-cmdq-helper.c
@@ -27,6 +27,31 @@ struct cmdq_instruction {
u8 op;
};
+struct cmdq_client_reg *cmdq_dev_get_client_reg(struct device *dev, int idx)
+{
+ struct cmdq_client_reg *client_reg;
+ struct of_phandle_args spec;
+
+ client_reg = devm_kzalloc(dev, sizeof(*client_reg), GFP_KERNEL);
+ if (!client_reg)
+ return NULL;
+
+ if (of_parse_phandle_with_args(dev->of_node, "mediatek,gce-client-reg",
+ "#subsys-cells", idx, &spec)) {
+ dev_err(dev, "can't parse gce-client-reg property (%d)", idx);
+
+ return NULL;
+ }
+
+ client_reg->subsys = spec.args[0];
+ client_reg->offset = spec.args[1];
+ client_reg->size = spec.args[2];
+ of_node_put(spec.np);
+
+ return client_reg;
+}
+EXPORT_SYMBOL(cmdq_dev_get_client_reg);
+
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 a345870a6d10..d0dea3780f7a 100644
--- a/include/linux/soc/mediatek/mtk-cmdq.h
+++ b/include/linux/soc/mediatek/mtk-cmdq.h
@@ -15,6 +15,12 @@
struct cmdq_pkt;
+struct cmdq_client_reg {
+ u8 subsys;
+ u16 offset;
+ u16 size;
+};
+
struct cmdq_client {
spinlock_t lock;
u32 pkt_cnt;
@@ -142,4 +148,16 @@ int cmdq_pkt_flush_async(struct cmdq_pkt *pkt, cmdq_async_flush_cb cb,
*/
int cmdq_pkt_flush(struct cmdq_pkt *pkt);
+/**
+ * cmdq_dev_get_client_reg() - parse cmdq client reg from the device node of CMDQ client
+ * @dev: device of CMDQ mailbox client
+ * @idx: the index of desired reg
+ *
+ * Return: CMDQ client reg pointer
+ *
+ * Help CMDQ client pasing the cmdq client reg
+ * from the device node of CMDQ client.
+ */
+struct cmdq_client_reg *cmdq_dev_get_client_reg(struct device *dev, int idx);
+
#endif /* __MTK_CMDQ_H__ */
--
2.18.0
