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firmware: arm_scmi: imx: Discover MISC board info from the system manager

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The i.MX SCMI MISC protocol can report board information from the
System Manager (SM), including a board name and board-specific
attributes. Query this during protocol initialization.

If the firmware does not implement BOARD_INFO, handle -EOPNOTSUPP
gracefully and continue.

Reviewed-by: Cristian Marussi <cristian.marussi@arm.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
Message-Id: <20250904-sm-misc-api-v1-v4-4-0bf10eaabdf1@nxp.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
This commit is contained in:
Peng Fan
2025-09-04 18:40:45 +08:00
committed by Sudeep Holla
parent d3e25c244d
commit 88d3671baf
1 changed files with 35 additions and 0 deletions
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35
drivers/firmware/arm_scmi/vendors/imx/imx-sm-misc.c vendored
View File

@@ -28,6 +28,7 @@ enum scmi_imx_misc_protocol_cmd {
SCMI_IMX_MISC_DISCOVER_BUILD_INFO = 0x6,
SCMI_IMX_MISC_CTRL_NOTIFY = 0x8,
SCMI_IMX_MISC_CFG_INFO_GET = 0xC,
SCMI_IMX_MISC_BOARD_INFO = 0xE,
};
struct scmi_imx_misc_info {
@@ -76,6 +77,12 @@ struct scmi_imx_misc_buildinfo_out {
u8 buildtime[MISC_MAX_BUILDTIME];
};
struct scmi_imx_misc_board_info_out {
__le32 attributes;
#define MISC_MAX_BRDNAME 16
u8 brdname[MISC_MAX_BRDNAME];
};
struct scmi_imx_misc_cfg_info_out {
__le32 msel;
#define MISC_MAX_CFGNAME 16
@@ -316,6 +323,30 @@ static int scmi_imx_misc_build_info_discover(const struct scmi_protocol_handle *
return ret;
}
static int scmi_imx_misc_board_info(const struct scmi_protocol_handle *ph)
{
struct scmi_imx_misc_board_info_out *out;
char name[MISC_MAX_BRDNAME];
struct scmi_xfer *t;
int ret;
ret = ph->xops->xfer_get_init(ph, SCMI_IMX_MISC_BOARD_INFO, 0, sizeof(*out), &t);
if (ret)
return ret;
ret = ph->xops->do_xfer(ph, t);
if (!ret) {
out = t->rx.buf;
strscpy(name, out->brdname, MISC_MAX_BRDNAME);
dev_info(ph->dev, "Board\t\t= %s, attr=0x%08x\n",
name, le32_to_cpu(out->attributes));
}
ph->xops->xfer_put(ph, t);
return ret;
}
static int scmi_imx_misc_cfg_info_get(const struct scmi_protocol_handle *ph)
{
struct scmi_imx_misc_cfg_info_out *out;
@@ -371,6 +402,10 @@ static int scmi_imx_misc_protocol_init(const struct scmi_protocol_handle *ph)
if (ret && ret != -EOPNOTSUPP)
return ret;
ret = scmi_imx_misc_board_info(ph);
if (ret && ret != -EOPNOTSUPP)
return ret;
ret = scmi_imx_misc_cfg_info_get(ph);
if (ret && ret != -EOPNOTSUPP)
return ret;