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firmware: imx: sm-misc: Print boot/shutdown reasons

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Add reset reason string table for i.MX95 and introduce a helper
(scmi_imx_misc_get_reason) to query and print both system and LM
(Logical Machine) reset reasons via the SCMI MISC protocol.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
Link: https://patch.msgid.link/20260305-scmi-imx-reset-v1-2-18de78978ba9@nxp.com
Acked-by: Frank Li <Frank.Li@nxp.com>
Signed-off-by: Sudeep Holla <sudeep.holla@kernel.org>
This commit is contained in:
Peng Fan
2026-03-05 09:56:45 +08:00
committed by Sudeep Holla
parent dc7ccfc86c
commit c17216c1a9
1 changed files with 73 additions and 0 deletions
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73
drivers/firmware/imx/sm-misc.c
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@@ -18,6 +18,29 @@ static const struct scmi_imx_misc_proto_ops *imx_misc_ctrl_ops;
static struct scmi_protocol_handle *ph;
struct notifier_block scmi_imx_misc_ctrl_nb;
static const char * const rst_imx95[] = {
"cm33_lockup", "cm33_swreq", "cm7_lockup", "cm7_swreq", "fccu",
"jtag_sw", "ele", "tempsense", "wdog1", "wdog2", "wdog3", "wdog4",
"wdog5", "jtag", "cm33_exc", "bbm", "sw", "sm_err", "fusa_sreco",
"pmic", "unused", "unused", "unused", "unused", "unused", "unused",
"unused", "unused", "unused", "unused", "unused", "por",
};
static const char * const rst_imx94[] = {
"cm33_lockup", "cm33_swreq", "cm70_lockup", "cm70_swreq", "fccu",
"jtag_sw", "ele", "tempsense", "wdog1", "wdog2", "wdog3", "wdog4",
"wdog5", "jtag", "wdog6", "wdog7", "wdog8", "wo_netc", "cm33s_lockup",
"cm33s_swreq", "cm71_lockup", "cm71_swreq", "cm33_exc", "bbm", "sw",
"sm_err", "fusa_sreco", "pmic", "unused", "unused", "unused", "por",
};
static const struct of_device_id allowlist[] = {
{ .compatible = "fsl,imx952", .data = rst_imx95 },
{ .compatible = "fsl,imx95", .data = rst_imx95 },
{ .compatible = "fsl,imx94", .data = rst_imx94 },
{ /* Sentinel */ }
};
int scmi_imx_misc_ctrl_set(u32 id, u32 val)
{
if (!ph)
@@ -75,6 +98,54 @@ static void scmi_imx_misc_put(void *p)
debugfs_remove((struct dentry *)p);
}
static int scmi_imx_misc_get_reason(struct scmi_device *sdev)
{
struct scmi_imx_misc_reset_reason boot, shutdown;
const char **rst;
bool system = true;
int ret;
if (!of_machine_device_match(allowlist))
return 0;
rst = (const char **)of_machine_get_match_data(allowlist);
ret = imx_misc_ctrl_ops->misc_reset_reason(ph, system, &boot, &shutdown, NULL);
if (!ret) {
if (boot.valid)
dev_info(&sdev->dev, "%s Boot reason: %s, origin: %d, errid: %d\n",
system ? "SYS" : "LM", rst[boot.reason],
boot.orig_valid ? boot.origin : -1,
boot.err_valid ? boot.errid : -1);
if (shutdown.valid)
dev_info(&sdev->dev, "%s shutdown reason: %s, origin: %d, errid: %d\n",
system ? "SYS" : "LM", rst[shutdown.reason],
shutdown.orig_valid ? shutdown.origin : -1,
shutdown.err_valid ? shutdown.errid : -1);
} else {
dev_err(&sdev->dev, "Failed to get system reset reason: %d\n", ret);
}
system = false;
ret = imx_misc_ctrl_ops->misc_reset_reason(ph, system, &boot, &shutdown, NULL);
if (!ret) {
if (boot.valid)
dev_info(&sdev->dev, "%s Boot reason: %s, origin: %d, errid: %d\n",
system ? "SYS" : "LM", rst[boot.reason],
boot.orig_valid ? boot.origin : -1,
boot.err_valid ? boot.errid : -1);
if (shutdown.valid)
dev_info(&sdev->dev, "%s shutdown reason: %s, origin: %d, errid: %d\n",
system ? "SYS" : "LM", rst[shutdown.reason],
shutdown.orig_valid ? shutdown.origin : -1,
shutdown.err_valid ? shutdown.errid : -1);
} else {
dev_err(&sdev->dev, "Failed to get lm reset reason: %d\n", ret);
}
return 0;
}
static int scmi_imx_misc_ctrl_probe(struct scmi_device *sdev)
{
const struct scmi_handle *handle = sdev->handle;
@@ -133,6 +204,8 @@ static int scmi_imx_misc_ctrl_probe(struct scmi_device *sdev)
scmi_imx_dentry = debugfs_create_dir("scmi_imx", NULL);
debugfs_create_file("syslog", 0444, scmi_imx_dentry, &sdev->dev, &syslog_fops);
scmi_imx_misc_get_reason(sdev);
return devm_add_action_or_reset(&sdev->dev, scmi_imx_misc_put, scmi_imx_dentry);
}