From 34cae37f5893a7e6a95c8ee6d43decfe91de0168 Mon Sep 17 00:00:00 2001
From: "Andrew F. Davis" <afd@ti.com>
Date: Thu, 9 Aug 2018 10:01:53 -0500
Subject: [PATCH] ti: k3: common: Add basic PSCI core off support
Use TI-SCI messages to request core power down from system controller
firmware.
Signed-off-by: Andrew F. Davis <afd@ti.com>
---
plat/ti/k3/common/k3_psci.c | 11 ++++++++++-
1 file changed, 10 insertions(+), 1 deletion(-)
diff --git a/plat/ti/k3/common/k3_psci.c b/plat/ti/k3/common/k3_psci.c
index 4c501f571..e75ebac8c 100644
--- a/plat/ti/k3/common/k3_psci.c
+++ b/plat/ti/k3/common/k3_psci.c
@@ -76,10 +76,19 @@ static int k3_pwr_domain_on(u_register_t mpidr)
void k3_pwr_domain_off(const psci_power_state_t *target_state)
{
+ int core_id, device, ret;
+
/* Prevent interrupts from spuriously waking up this cpu */
k3_gic_cpuif_disable();
- /* TODO: Indicate to System firmware about powering down */
+ core_id = plat_my_core_pos();
+ device = PLAT_PROC_DEVICE_START_ID + core_id;
+
+ ret = ti_sci_device_put(device);
+ if (ret) {
+ ERROR("Request to stop core failed: %d\n", ret);
+ return;
+ }
}
void k3_pwr_domain_on_finish(const psci_power_state_t *target_state)
--
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