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authorAnson Huang <Anson.Huang@nxp.com>2019-01-24 16:09:52 +0800
committerAnson Huang <Anson.Huang@nxp.com>2019-01-29 09:26:41 +0800
commit3a2b51993d0c9666a6e1bdc4fd45a987ef6f1266 (patch)
treeff6ffd2cc25b596716eb90d0c16efcc7e484943e /plat/imx/imx8qm/imx8qm_bl31_setup.c
parente9b77791ab11b25391ef758d41a39584d14ff2e9 (diff)
downloadtrusted-firmware-a-3a2b51993d0c9666a6e1bdc4fd45a987ef6f1266.tar.gz
imx: power optimization for i.mx8qm
Current implementation of i.MX8QM power management related features does NOT optimize power number, all system resources like CCI, DDR, and A cluster etc. are kept in STBY mode (powered ON) when system suspend or CPU hotplug. To lower the power number, OFF mode should be adopted for those system resources whenever they can be OFF, A cluster will be OFF if the CPUs in the cluster are all off line, DDR/MU/DB can be OFF if system suspend, IRQ steer can be OFF if the wakeup source is belonged to system controller partition, so wakeup source runtime check is used to determine if IRQ steer can be OFF before system suspend. If resources are powered off for suspend, they should be restored properly after system resume. Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
Diffstat (limited to 'plat/imx/imx8qm/imx8qm_bl31_setup.c')
-rw-r--r--plat/imx/imx8qm/imx8qm_bl31_setup.c10
1 files changed, 5 insertions, 5 deletions
diff --git a/plat/imx/imx8qm/imx8qm_bl31_setup.c b/plat/imx/imx8qm/imx8qm_bl31_setup.c
index a00695cc3e..c76de64616 100644
--- a/plat/imx/imx8qm/imx8qm_bl31_setup.c
+++ b/plat/imx/imx8qm/imx8qm_bl31_setup.c
@@ -49,11 +49,7 @@ const static int imx8qm_cci_map[] = {
};
static const mmap_region_t imx_mmap[] = {
- MAP_REGION_FLAT(IMX_BOOT_UART_BASE, IMX_BOOT_UART_SIZE, MT_DEVICE | MT_RW),
- MAP_REGION_FLAT(SC_IPC_BASE, SC_IPC_SIZE, MT_DEVICE | MT_RW),
- MAP_REGION_FLAT(PLAT_GICD_BASE, PLAT_GICD_SIZE, MT_DEVICE | MT_RW),
- MAP_REGION_FLAT(PLAT_GICR_BASE, PLAT_GICR_SIZE, MT_DEVICE | MT_RW),
- MAP_REGION_FLAT(PLAT_CCI_BASE, PLAT_CCI_SIZE, MT_DEVICE | MT_RW),
+ MAP_REGION_FLAT(IMX_REG_BASE, IMX_REG_SIZE, MT_DEVICE | MT_RW),
{0}
};
@@ -324,6 +320,10 @@ void bl31_early_platform_setup2(u_register_t arg0, u_register_t arg1,
/* turn on MU1 for non-secure OS/Hypervisor */
sc_pm_set_resource_power_mode(ipc_handle, SC_R_MU_1A, SC_PM_PW_MODE_ON);
+ /* Turn on GPT_0's power & clock for non-secure OS/Hypervisor */
+ sc_pm_set_resource_power_mode(ipc_handle, SC_R_GPT_0, SC_PM_PW_MODE_ON);
+ sc_pm_clock_enable(ipc_handle, SC_R_GPT_0, SC_PM_CLK_PER, true, 0);
+ mmio_write_32(IMX_GPT_LPCG_BASE, mmio_read_32(IMX_GPT_LPCG_BASE) | (1 << 25));
/*
* create new partition for non-secure OS/Hypervisor