diff options
| -rw-r--r-- | drivers/firmware/scmi/scmi_agent-uclass.c | 91 | ||||
| -rw-r--r-- | include/scmi_agent-uclass.h | 15 | ||||
| -rw-r--r-- | include/scmi_agent.h | 14 |
3 files changed, 116 insertions, 4 deletions
diff --git a/drivers/firmware/scmi/scmi_agent-uclass.c b/drivers/firmware/scmi/scmi_agent-uclass.c index 1fa1e9eef96..b4d00883518 100644 --- a/drivers/firmware/scmi/scmi_agent-uclass.c +++ b/drivers/firmware/scmi/scmi_agent-uclass.c @@ -38,6 +38,80 @@ static const struct error_code scmi_linux_errmap[] = { { .scmi = SCMI_PROTOCOL_ERROR, .errno = -EPROTO, }, }; +struct udevice *scmi_get_protocol(struct udevice *dev, + enum scmi_std_protocol id) +{ + struct scmi_agent_priv *priv; + struct udevice *proto; + + priv = dev_get_uclass_plat(dev); + if (!priv) { + dev_err(dev, "No priv data found\n"); + return NULL; + } + + switch (id) { + case SCMI_PROTOCOL_ID_CLOCK: + proto = priv->clock_dev; + break; + case SCMI_PROTOCOL_ID_RESET_DOMAIN: + proto = priv->resetdom_dev; + break; + case SCMI_PROTOCOL_ID_VOLTAGE_DOMAIN: + proto = priv->voltagedom_dev; + break; + default: + dev_err(dev, "Protocol not supported\n"); + proto = NULL; + break; + } + if (proto && device_probe(proto)) + dev_err(dev, "Probe failed\n"); + + return proto; +} + +/** + * scmi_add_protocol - add protocol to agent + * @dev: SCMI agent device + * @proto_id: SCMI protocol ID + * @proto: SCMI protocol device + * + * Associate the protocol instance, @proto, to the agent, @dev, + * for later use. + * + * Return: 0 on success, error code on failure + */ +static int scmi_add_protocol(struct udevice *dev, + enum scmi_std_protocol proto_id, + struct udevice *proto) +{ + struct scmi_agent_priv *priv; + + priv = dev_get_uclass_plat(dev); + if (!priv) { + dev_err(dev, "No priv data found\n"); + return -ENODEV; + } + + switch (proto_id) { + case SCMI_PROTOCOL_ID_CLOCK: + priv->clock_dev = proto; + break; + case SCMI_PROTOCOL_ID_RESET_DOMAIN: + priv->resetdom_dev = proto; + break; + case SCMI_PROTOCOL_ID_VOLTAGE_DOMAIN: + priv->voltagedom_dev = proto; + break; + default: + dev_err(dev, "Protocol not supported\n"); + return -EPROTO; + } + + return 0; +} + int scmi_to_linux_errno(s32 scmi_code) { int n; @@ -168,9 +242,10 @@ static int scmi_bind_protocols(struct udevice *dev) int ret = 0; ofnode node; const char *name; + struct driver *drv; + struct udevice *proto; dev_for_each_subnode(node, dev) { - struct driver *drv = NULL; u32 protocol_id; if (!ofnode_is_enabled(node)) @@ -179,6 +254,7 @@ static int scmi_bind_protocols(struct udevice *dev) if (ofnode_read_u32(node, "reg", &protocol_id)) continue; + drv = NULL; name = ofnode_get_name(node); switch (protocol_id) { case SCMI_PROTOCOL_ID_CLOCK: @@ -209,9 +285,17 @@ static int scmi_bind_protocols(struct udevice *dev) continue; } - ret = device_bind(dev, drv, name, NULL, node, NULL); - if (ret) + ret = device_bind(dev, drv, name, NULL, node, &proto); + if (ret) { + dev_err(dev, "failed to bind %s protocol\n", drv->name); break; + } + ret = scmi_add_protocol(dev, protocol_id, proto); + if (ret) { + dev_err(dev, "failed to add protocol: %s, ret: %d\n", + proto->name, ret); + break; + } } return ret; @@ -221,5 +305,6 @@ UCLASS_DRIVER(scmi_agent) = { .id = UCLASS_SCMI_AGENT, .name = "scmi_agent", .post_bind = scmi_bind_protocols, + .per_device_plat_auto = sizeof(struct scmi_agent_priv), .per_child_auto = sizeof(struct scmi_agent_proto_priv), }; diff --git a/include/scmi_agent-uclass.h b/include/scmi_agent-uclass.h index eee46c880a5..258aa0f3759 100644 --- a/include/scmi_agent-uclass.h +++ b/include/scmi_agent-uclass.h @@ -5,11 +5,24 @@ #ifndef _SCMI_AGENT_UCLASS_H #define _SCMI_AGENT_UCLASS_H -struct udevice; +#include <dm/device.h> + struct scmi_msg; struct scmi_channel; /** + * struct scmi_agent_priv - private data maintained by agent instance + * @clock_dev: SCMI clock protocol device + * @resetdom_dev: SCMI reset domain protocol device + * @voltagedom_dev: SCMI voltage domain protocol device + */ +struct scmi_agent_priv { + struct udevice *clock_dev; + struct udevice *resetdom_dev; + struct udevice *voltagedom_dev; +}; + +/** * struct scmi_transport_ops - The functions that a SCMI transport layer must implement. */ struct scmi_agent_ops { diff --git a/include/scmi_agent.h b/include/scmi_agent.h index 577892029ff..755986d6c42 100644 --- a/include/scmi_agent.h +++ b/include/scmi_agent.h @@ -10,6 +10,7 @@ #ifndef SCMI_AGENT_H #define SCMI_AGENT_H +#include <scmi_protocols.h> #include <asm/types.h> struct udevice; @@ -75,6 +76,19 @@ int devm_scmi_of_get_channel(struct udevice *dev); int devm_scmi_process_msg(struct udevice *dev, struct scmi_msg *msg); /** + * scmi_get_protocol() - get protocol instance + * + * @dev: SCMI agent device + * @id: SCMI protocol ID + * + * Obtain the device instance for given protocol ID, @id. + * + * Return: Pointer to the device if found, null otherwise + */ +struct udevice *scmi_get_protocol(struct udevice *dev, + enum scmi_std_protocol id); + +/** * scmi_to_linux_errno() - Convert an SCMI error code into a Linux errno code * * @scmi_errno: SCMI error code value |