firmware: ti_sci: Add BOARDCFG_MANAGED mode support

In BOARDCFG_MANAGED mode, the low power mode configuration is done
statically for the DM via the boardcfg. Constraints are not supported,
and prepare_sleep() is not needed.

Reviewed-by: Dhruva Gole <d-gole@ti.com>
Reviewed-by: Kendall Willis <k-willis@ti.com>
Signed-off-by: Thomas Richard (TI) <thomas.richard@bootlin.com>
Link: https://patch.msgid.link/20260519-ti-sci-jacinto-s2r-restore-irq-v9-1-c550a8ae0f31@bootlin.com
Signed-off-by: Nishanth Menon <nm@ti.com>

diff --git a/drivers/firmware/ti_sci.c b/drivers/firmware/ti_sci.c
index e027a2bd8f265892412a642be146f4dd806fbd4e..a8dcdbe874b65445b55a758a6f308b086197ba84 100644 (file)
--- a/drivers/firmware/ti_sci.c
+++ b/drivers/firmware/ti_sci.c
@@ -3770,8 +3770,11 @@ static int ti_sci_prepare_system_suspend(struct ti_sci_info *info)
                        return ti_sci_cmd_prepare_sleep(&info->handle,
                                                        TISCI_MSG_VALUE_SLEEP_MODE_DM_MANAGED,
                                                        0, 0, 0);
+               } else if (info->fw_caps & MSG_FLAG_CAPS_LPM_BOARDCFG_MANAGED) {
+                       /* Nothing to do in the BOARDCFG_MANAGED mode */
+                       return 0;
                } else {
-                       /* DM Managed is not supported by the firmware. */
+                       /* DM Managed and BoardCfg Managed are not supported by the firmware. */
                        dev_err(info->dev, "Suspend to memory is not supported by the firmware\n");
                        return -EOPNOTSUPP;
                }
@@ -4009,12 +4012,13 @@ static int ti_sci_probe(struct platform_device *pdev)
        }
 
        ti_sci_msg_cmd_query_fw_caps(&info->handle, &info->fw_caps);
-       dev_dbg(dev, "Detected firmware capabilities: %s%s%s%s%s\n",
+       dev_dbg(dev, "Detected firmware capabilities: %s%s%s%s%s%s\n",
                info->fw_caps & MSG_FLAG_CAPS_GENERIC ? "Generic" : "",
                info->fw_caps & MSG_FLAG_CAPS_LPM_PARTIAL_IO ? " Partial-IO" : "",
                info->fw_caps & MSG_FLAG_CAPS_LPM_DM_MANAGED ? " DM-Managed" : "",
                info->fw_caps & MSG_FLAG_CAPS_LPM_ABORT ? " LPM-Abort" : "",
-               info->fw_caps & MSG_FLAG_CAPS_IO_ISOLATION ? " IO-Isolation" : ""
+               info->fw_caps & MSG_FLAG_CAPS_IO_ISOLATION ? " IO-Isolation" : "",
+               info->fw_caps & MSG_FLAG_CAPS_LPM_BOARDCFG_MANAGED ? " BoardConfig-Managed" : ""
        );
 
        ti_sci_setup_ops(info);

diff --git a/drivers/firmware/ti_sci.h b/drivers/firmware/ti_sci.h
index 4616127e33ff621518ae1be411fee658f0bc2c07..d5e06769b01ca5300182b466a99b0f3f23a8732d 100644 (file)
--- a/drivers/firmware/ti_sci.h
+++ b/drivers/firmware/ti_sci.h
@@ -150,6 +150,8 @@ struct ti_sci_msg_req_reboot {
  *             MSG_FLAG_CAPS_LPM_DM_MANAGED: LPM can be managed by DM
  *             MSG_FLAG_CAPS_LPM_ABORT: Abort entry to LPM
  *             MSG_FLAG_CAPS_IO_ISOLATION: IO Isolation support
+ *             MSG_FLAG_CAPS_LPM_BOARDCFG_MANAGED: LPM config done statically
+ *                     for the DM via boardcfg
  *
  * Response to a generic message with message type TI_SCI_MSG_QUERY_FW_CAPS
  * providing currently available SOC/firmware capabilities. SoC that don't
@@ -162,6 +164,7 @@ struct ti_sci_msg_resp_query_fw_caps {
 #define MSG_FLAG_CAPS_LPM_DM_MANAGED   TI_SCI_MSG_FLAG(5)
 #define MSG_FLAG_CAPS_LPM_ABORT                TI_SCI_MSG_FLAG(9)
 #define MSG_FLAG_CAPS_IO_ISOLATION     TI_SCI_MSG_FLAG(7)
+#define MSG_FLAG_CAPS_LPM_BOARDCFG_MANAGED     TI_SCI_MSG_FLAG(12)
 #define MSG_MASK_CAPS_LPM              GENMASK_ULL(4, 1)
        u64 fw_caps;
 } __packed;