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imx: imx8qm: 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,
tested on i.MX8QM MEK board.

Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
This commit is contained in:
Anson Huang 2018-07-12 14:30:52 +08:00
parent d31ffcf0f7
commit 0f53bca05c
3 changed files with 28 additions and 1 deletions
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3
plat/imx/common/imx8_topology.c
View File

@ -11,7 +11,8 @@
const unsigned char imx_power_domain_tree_desc[] = {
PWR_DOMAIN_AT_MAX_LVL,
PLATFORM_CLUSTER_COUNT,
PLATFORM_CORE_COUNT,
PLATFORM_CLUSTER0_CORE_COUNT,
PLATFORM_CLUSTER1_CORE_COUNT,
};
const unsigned char *plat_get_power_domain_tree_desc(void)

24
plat/imx/imx8qm/imx8qm_psci.c
View File

@ -85,6 +85,29 @@ void imx_pwr_domain_on_finish(const psci_power_state_t *target_state)
plat_gic_cpuif_enable();
}
void imx_pwr_domain_off(const psci_power_state_t *target_state)
{
u_register_t mpidr = read_mpidr_el1();
unsigned int cluster_id = MPIDR_AFFLVL1_VAL(mpidr);
unsigned int cpu_id = MPIDR_AFFLVL0_VAL(mpidr);
plat_gic_cpuif_disable();
if (cluster_id == 0) {
sc_pm_req_cpu_low_power_mode(ipc_handle, ap_core_index[cpu_id],
SC_PM_PW_MODE_OFF, SC_PM_WAKE_SRC_NONE);
if (--a53_cpu_on_number == 0)
cci_disable_snoop_dvm_reqs(0);
} else {
sc_pm_req_cpu_low_power_mode(ipc_handle,
ap_core_index[cpu_id + 4],
SC_PM_PW_MODE_OFF,
SC_PM_WAKE_SRC_NONE);
if (--a72_cpu_on_number == 0)
cci_disable_snoop_dvm_reqs(1);
}
tf_printf("turn off cluster:%d core:%d\n", cluster_id, cpu_id);
}
int imx_validate_ns_entrypoint(uintptr_t ns_entrypoint)
{
return PSCI_E_SUCCESS;
@ -93,6 +116,7 @@ int imx_validate_ns_entrypoint(uintptr_t ns_entrypoint)
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,
.pwr_domain_off = imx_pwr_domain_off,
.validate_ns_entrypoint = imx_validate_ns_entrypoint,
.system_off = imx_system_off,
.system_reset = imx_system_reset,

2
plat/imx/imx8qx/include/platform_def.h
View File

@ -17,6 +17,8 @@
#define PLATFORM_MAX_CPU_PER_CLUSTER 4
#define PLATFORM_CLUSTER_COUNT 1
#define PLATFORM_CORE_COUNT 4
#define PLATFORM_CLUSTER0_CORE_COUNT 4
#define PLATFORM_CLUSTER1_CORE_COUNT 0
#define PWR_DOMAIN_AT_MAX_LVL 1
#define PLAT_MAX_PWR_LVL 2