diff options
| author | Anson Huang <Anson.Huang@nxp.com> | 2018-07-12 11:07:10 +0800 |
|---|---|---|
| committer | Anson Huang <Anson.Huang@nxp.com> | 2018-07-12 11:12:39 +0800 |
| commit | 3260f5c7c864e1f93157a5ff1bbe8f93cc9bbed0 (patch) | |
| tree | 55eea6d9d39b5248b2939b461bd23917d79ee14a /plat/imx/imx8qx/imx8qx_psci.c | |
| parent | 351e3731cacf9c36f94a80e0bee6af021bed7faf (diff) | |
imx: imx8qx: add domain off support
Add domain off support for Linux kernel's cpu
hot-plug feature, when there are cpu off request
from Linux kernel, TF-A will send command to
system controller to do CPU power gate accordingly.
Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
Diffstat (limited to 'plat/imx/imx8qx/imx8qx_psci.c')
| -rw-r--r-- | plat/imx/imx8qx/imx8qx_psci.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/plat/imx/imx8qx/imx8qx_psci.c b/plat/imx/imx8qx/imx8qx_psci.c index 80f747b1..7a6e822b 100644 --- a/plat/imx/imx8qx/imx8qx_psci.c +++ b/plat/imx/imx8qx/imx8qx_psci.c @@ -60,12 +60,24 @@ int imx_validate_ns_entrypoint(uintptr_t ns_entrypoint) return PSCI_E_SUCCESS; } +void imx_pwr_domain_off(const psci_power_state_t *target_state) +{ + u_register_t mpidr = read_mpidr_el1(); + unsigned int cpu_id = MPIDR_AFFLVL0_VAL(mpidr); + + plat_gic_cpuif_disable(); + sc_pm_req_cpu_low_power_mode(ipc_handle, ap_core_index[cpu_id], + SC_PM_PW_MODE_OFF, SC_PM_WAKE_SRC_NONE); + tf_printf("turn off core:%d\n", cpu_id); +} + static const plat_psci_ops_t imx_plat_psci_ops = { .pwr_domain_on = imx_pwr_domain_on, .pwr_domain_on_finish = imx_pwr_domain_on_finish, .validate_ns_entrypoint = imx_validate_ns_entrypoint, .system_off = imx_system_off, .system_reset = imx_system_reset, + .pwr_domain_off = imx_pwr_domain_off, }; int plat_setup_psci_ops(uintptr_t sec_entrypoint, |