firmware: scmi_agent: add SCMI pin control protocol support

This patch adds SCMI pin control protocol support to make the pin
controller driver based on SCMI, such as
drivers/pinctrl/nxp/pinctrl-imx-scmi.c, can be bound to the SCMI agent
device whose protocol id is 0x19.

Signed-off-by: Alice Guo <alice.guo@nxp.com>

diff --git a/drivers/firmware/scmi/scmi_agent-uclass.c b/drivers/firmware/scmi/scmi_agent-uclass.c
index cc3f31d..e7ec2c1 100644 (file)
--- a/drivers/firmware/scmi/scmi_agent-uclass.c
+++ b/drivers/firmware/scmi/scmi_agent-uclass.c
@@ -97,6 +97,9 @@ struct udevice *scmi_get_protocol(struct udevice *dev,
        case SCMI_PROTOCOL_ID_VOLTAGE_DOMAIN:
                proto = priv->voltagedom_dev;
                break;
+       case SCMI_PROTOCOL_ID_PINCTRL:
+               proto = priv->pinctrl_dev;
+               break;
        default:
                dev_err(dev, "Protocol not supported\n");
                proto = NULL;
@@ -147,6 +150,9 @@ static int scmi_add_protocol(struct udevice *dev,
        case SCMI_PROTOCOL_ID_VOLTAGE_DOMAIN:
                priv->voltagedom_dev = proto;
                break;
+       case SCMI_PROTOCOL_ID_PINCTRL:
+               priv->pinctrl_dev = proto;
+               break;
        default:
                dev_err(dev, "Protocol not supported\n");
                return -EPROTO;

diff --git a/drivers/pinctrl/nxp/pinctrl-imx-scmi.c b/drivers/pinctrl/nxp/pinctrl-imx-scmi.c
index 5b7122b..aed47be 100644 (file)
--- a/drivers/pinctrl/nxp/pinctrl-imx-scmi.c
+++ b/drivers/pinctrl/nxp/pinctrl-imx-scmi.c
@@ -10,6 +10,7 @@
 #include <dm/devres.h>
 #include <dm/pinctrl.h>
 #include <scmi_agent.h>
+#include <scmi_agent-uclass.h>
 #include <scmi_protocols.h>
 
 #include "pinctrl-imx.h"
@@ -155,3 +156,10 @@ U_BOOT_DRIVER(scmi_pinctrl_imx) = {
        .ops = &imx_scmi_pinctrl_ops,
        .flags = DM_FLAG_PRE_RELOC,
 };
+
+static struct scmi_proto_match match[] = {
+       { .proto_id = SCMI_PROTOCOL_ID_PINCTRL },
+       { /* Sentinel */ }
+};
+
+U_BOOT_SCMI_PROTO_DRIVER(scmi_pinctrl_imx, match);

diff --git a/include/scmi_agent-uclass.h b/include/scmi_agent-uclass.h
index 842c568..d6586eb 100644 (file)
--- a/include/scmi_agent-uclass.h
+++ b/include/scmi_agent-uclass.h
@@ -27,6 +27,7 @@ struct scmi_channel;
  * @clock_dev:         SCMI clock protocol device
  * @resetdom_dev:      SCMI reset domain protocol device
  * @voltagedom_dev:    SCMI voltage domain protocol device
+ * @pinctrl_dev:       SCMI pin control protocol device
  */
 struct scmi_agent_priv {
        u32 version;
@@ -43,6 +44,7 @@ struct scmi_agent_priv {
        struct udevice *clock_dev;
        struct udevice *resetdom_dev;
        struct udevice *voltagedom_dev;
+       struct udevice *pinctrl_dev;
 };
 
 static inline u32 scmi_version(struct udevice *dev)