From fd4d109487f1345ddb72621039e219565a2e294d Mon Sep 17 00:00:00 2001
From: Nick Chan <towinchenmi@gmail.com>
Date: Wed, 6 Aug 2025 22:34:22 +0800
Subject: [PATCH] smc: Boot SMC on A11 and T2

- Turn SMC on in PMGR before trying to use it
- Turn SMC on before booting Linux so kernel can use it (SMC has no reason to
be off during runtime even in sleep mode because it handles the battery, power
supply and other stuff that needs to stay on)

Signed-off-by: Nick Chan <towinchenmi@gmail.com>
---
 src/kboot.c |  8 ++++++++
 src/smc.c   | 15 +++++++++++++++
 src/smc.h   |  1 +
 3 files changed, 24 insertions(+)

diff --git a/src/kboot.c b/src/kboot.c
index 97bafb729..c322bb6ac 100644
--- a/src/kboot.c
+++ b/src/kboot.c
@@ -21,6 +21,7 @@
 #include "pmgr.h"
 #include "sep.h"
 #include "sio.h"
+#include "smc.h"
 #include "smp.h"
 #include "tunables.h"
 #include "types.h"
@@ -2746,6 +2747,13 @@ int kboot_boot(void *kernel)
     pcie_init();
     dapf_init_all();
 
+    if (chip_id == T8015 || chip_id == T8012) {
+        smc_power_on();
+        asc_dev_t *smc = asc_init("/arm-io/smc");
+        asc_cpu_start(smc);
+        asc_free(smc);
+    }
+
     printf("Setting SMP mode to WFE...\n");
     smp_set_wfe_mode(true);
     printf("Preparing to boot kernel at %p with fdt at %p\n", kernel, dt);
diff --git a/src/smc.c b/src/smc.c
index 3fee45ad9..b1a824297 100644
--- a/src/smc.c
+++ b/src/smc.c
@@ -1,7 +1,9 @@
 /* SPDX-License-Identifier: MIT */
 
+#include "adt.h"
 #include "assert.h"
 #include "malloc.h"
+#include "pmgr.h"
 #include "smc.h"
 #include "string.h"
 #include "types.h"
@@ -120,12 +122,25 @@ void smc_shutdown(smc_dev_t *smc)
     free(smc);
 }
 
+void smc_power_on(void)
+{
+    if (chip_id != T8015 && chip_id != T8012)
+        return;
+
+    pmgr_power_on(0, "SMC_I2CM1");
+    pmgr_power_on(0, "SMC_FABRIC");
+    pmgr_adt_power_enable("/arm-io/smc");
+}
+
 smc_dev_t *smc_init(void)
 {
     smc_dev_t *smc = calloc(1, sizeof(smc_dev_t));
     if (!smc)
         return NULL;
 
+    if (chip_id == T8015 || chip_id == T8012)
+        smc_power_on();
+
     smc->asc = asc_init("/arm-io/smc");
     if (!smc->asc) {
         printf("SMC: failed to initialize ASC\n");
diff --git a/src/smc.h b/src/smc.h
index 3cb470457..731d90547 100644
--- a/src/smc.h
+++ b/src/smc.h
@@ -12,6 +12,7 @@ typedef struct smc_dev smc_dev_t;
 int smc_write_u32(smc_dev_t *smc, u32 key, u32 value);
 
 smc_dev_t *smc_init(void);
+void smc_power_on(void);
 void smc_shutdown(smc_dev_t *smc);
 
 #endif