In order to support legacy SCP functions from kernel-wide driver, add legacy
functions using the legacy command enums and calling legacy_scpi_send_message.

Signed-off-by: Neil Armstrong <redacted>
---
 drivers/firmware/arm_scpi.c | 118 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 118 insertions(+)

diff --git a/drivers/firmware/arm_scpi.c b/drivers/firmware/arm_scpi.c
index 50b1297..bb9965f 100644
--- a/drivers/firmware/arm_scpi.c
+++ b/drivers/firmware/arm_scpi.c

@@ -578,6 +578,8 @@ scpi_clk_get_range(u16 clk_id, unsigned long *min, unsigned long *max)
 	return ret;
 }

+/* scpi_clk_get_range not available for legacy */
+
 static unsigned long scpi_clk_get_val(u16 clk_id)
 {
 	int ret;

@@ -589,6 +591,18 @@ static unsigned long scpi_clk_get_val(u16 clk_id)
 	return ret ? ret : le32_to_cpu(clk.rate);
 }

+static unsigned long legacy_scpi_clk_get_val(u16 clk_id)
+{
+	int ret;
+	struct clk_get_value clk;
+	__le16 le_clk_id = cpu_to_le16(clk_id);
+
+	ret = legacy_scpi_send_message(LEGACY_SCPI_CMD_GET_CLOCK_VALUE,
+				       &le_clk_id, sizeof(le_clk_id),
+				       &clk, sizeof(clk));
+	return ret ? ret : le32_to_cpu(clk.rate);
+}
+
 static int scpi_clk_set_val(u16 clk_id, unsigned long rate)
 {
 	int stat;

@@ -601,6 +615,19 @@ static int scpi_clk_set_val(u16 clk_id, unsigned long rate)
 				 &stat, sizeof(stat));
 }

+static int legacy_scpi_clk_set_val(u16 clk_id, unsigned long rate)
+{
+	int stat;
+	struct legacy_clk_set_value clk = {
+		.id = cpu_to_le16(clk_id),
+		.rate = cpu_to_le32(rate)
+	};
+
+	return legacy_scpi_send_message(LEGACY_SCPI_CMD_SET_CLOCK_VALUE,
+					&clk, sizeof(clk),
+					&stat, sizeof(stat));