[PATCH v2 4/9] soc: mailbox: Add cmdq_pkt_write_s_reg_value to support write value to reg

[Jason-JH.Lin <jason-jh.lin@mediatek.com>]

Add cmdq_pkt_write_s_reg_value to support write a value to a register.

It appends write_s command to the command buffer in a CMDQ packet,
ask GCE to excute a write instruction to write a value to a register
with low 16 bits physical address offset.

Signed-off-by: Jason-JH.Lin <jason-jh.lin@mediatek.com>
---
 drivers/soc/mediatek/mtk-cmdq-helper.c | 13 +++++++++++++
 include/linux/soc/mediatek/mtk-cmdq.h  | 11 +++++++++++
 2 files changed, 24 insertions(+)

diff --git a/drivers/soc/mediatek/mtk-cmdq-helper.c b/drivers/soc/mediatek/mtk-cmdq-helper.c
index 5194d66dfc0a..4be2a18a4a02 100644
--- a/drivers/soc/mediatek/mtk-cmdq-helper.c
+++ b/drivers/soc/mediatek/mtk-cmdq-helper.c
@@ -287,6 +287,19 @@ int cmdq_pkt_write_s_value(struct cmdq_pkt *pkt, u8 high_addr_reg_idx,
 }
 EXPORT_SYMBOL(cmdq_pkt_write_s_value);
 
+int cmdq_pkt_write_s_reg_value(struct cmdq_pkt *pkt, u8 high_addr_reg_idx, u32 value)
+{
+	struct cmdq_instruction inst = {};
+
+	inst.op = CMDQ_CODE_WRITE_S;
+	inst.dst_t = CMDQ_REG_TYPE;
+	inst.reg_dst = high_addr_reg_idx;
+	inst.value = value;
+
+	return cmdq_pkt_append_command(pkt, inst);
+}
+EXPORT_SYMBOL(cmdq_pkt_write_s_reg_value);
+
 int cmdq_pkt_write_s_mask_value(struct cmdq_pkt *pkt, u8 high_addr_reg_idx,
 				u16 addr_low, u32 value, u32 mask)
 {
diff --git a/include/linux/soc/mediatek/mtk-cmdq.h b/include/linux/soc/mediatek/mtk-cmdq.h
index ea4fadfb5443..4262594a0d18 100644
--- a/include/linux/soc/mediatek/mtk-cmdq.h
+++ b/include/linux/soc/mediatek/mtk-cmdq.h
@@ -207,6 +207,17 @@ int cmdq_pkt_write_s_value(struct cmdq_pkt *pkt, u8 high_addr_reg_idx,
 int cmdq_pkt_write_s_mask_value(struct cmdq_pkt *pkt, u8 high_addr_reg_idx,
 				u16 addr_low, u32 value, u32 mask);
 
+/**
+ * cmdq_pkt_write_s_reg_value() - append write_s command to the CMDQ packet which
+ *				  write value to a register with low address pa
+ * @pkt:	the CMDQ packet
+ * @reg_idx:	internal register ID which contains high address of pa
+ * @value:	the specified target value
+ *
+ * Return: 0 for success; else the error code is returned
+ */
+int cmdq_pkt_write_s_reg_value(struct cmdq_pkt *pkt, u8 high_addr_reg_idx, u32 value);
+
 /**
  * cmdq_pkt_wfe() - append wait for event command to the CMDQ packet
  * @pkt:	the CMDQ packet
-- 
2.18.0