diff options
| author | Peng Fan <peng.fan@nxp.com> | 2020-07-09 13:52:41 +0800 |
|---|---|---|
| committer | Peng Fan <peng.fan@nxp.com> | 2020-07-14 15:23:47 +0800 |
| commit | 7a42bf048932af61e9f095a90edc96da394dee37 (patch) | |
| tree | 68e51163c887741102a0c781657611cc6c484744 /arch/arm/mach-imx | |
| parent | d1eee7eed90b8dc3053ddbe223cf4b3e75567b41 (diff) | |
imx8m: power down fused cores
For non-Quad SoCs, the fused cpu cores could be powered down in SPL
to save power.
Signed-off-by: Peng Fan <peng.fan@nxp.com>
Diffstat (limited to 'arch/arm/mach-imx')
| -rw-r--r-- | arch/arm/mach-imx/imx8m/soc.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/arch/arm/mach-imx/imx8m/soc.c b/arch/arm/mach-imx/imx8m/soc.c index c103bc3ad1..f74a343ed8 100644 --- a/arch/arm/mach-imx/imx8m/soc.c +++ b/arch/arm/mach-imx/imx8m/soc.c @@ -342,6 +342,25 @@ int arch_cpu_init(void) if (IS_ENABLED(CONFIG_SPL_BUILD)) { clock_init(); imx_set_wdog_powerdown(false); + + if (is_imx8md() || is_imx8mmd() || is_imx8mmdl() || is_imx8mms() || + is_imx8mmsl() || is_imx8mnd() || is_imx8mndl() || is_imx8mns() || + is_imx8mnsl() || is_imx8mpd()) { + /* Power down cpu core 1, 2 and 3 for iMX8M Dual core or Single core */ + struct pgc_reg *pgc_core1 = (struct pgc_reg *)(GPC_BASE_ADDR + 0x840); + struct pgc_reg *pgc_core2 = (struct pgc_reg *)(GPC_BASE_ADDR + 0x880); + struct pgc_reg *pgc_core3 = (struct pgc_reg *)(GPC_BASE_ADDR + 0x8C0); + struct gpc_reg *gpc = (struct gpc_reg *)GPC_BASE_ADDR; + + writel(0x1, &pgc_core2->pgcr); + writel(0x1, &pgc_core3->pgcr); + if (is_imx8mms() || is_imx8mmsl() || is_imx8mns() || is_imx8mnsl()) { + writel(0x1, &pgc_core1->pgcr); + writel(0xE, &gpc->cpu_pgc_dn_trg); + } else { + writel(0xC, &gpc->cpu_pgc_dn_trg); + } + } } if (is_imx8mq()) { |