Eric Lee / smarc-uboot

Download as
Browse Code ยป

Commit 96f627a6d50f0d84273140f92633c40ee57bc79e

Authored by Ye Li
1 parent e4926d4156
Exists in smarc_8mq_lf_v2020.04 and in 4 other branches pitx_8mp_lf_v2020.04, smarc-8m-android-11.0.0_2.0.0, smarc-8mp-android-11.0.0_2.0.0, smarc_8mp_lf_v2020.04

MLK-19526-5 imx8mq: Power down core 2/3 for iMX8MD 

CPU 2/3 are fused on iMX8MD, power down the two cores in SPL to
save power.

Signed-off-by: Ye Li <ye.li@nxp.com>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
(cherry picked from commit 0fc24973f5f8d32d0925bf0cf1eb3d8b75ae18b4)
(cherry picked from commit 732825eb2cfcf60143e2a21634549ce709f1d9b7)

Showing 1 changed file with 11 additions and 0 deletions Side-by-side Diff

arch/arm/mach-imx/imx8m/soc.c
Diff comments   View file @ 96f627a
... ... @@ -292,6 +292,17 @@
292 292 if (IS_ENABLED(CONFIG_SPL_BUILD)) {
293 293 clock_init();
294 294 imx_set_wdog_powerdown(false);
  295 +
  296 + if (is_imx8md()) {
  297 + /* Power down cpu core 2 and 3 for iMX8MD */
  298 + struct pgc_reg *pgc_core2 = (struct pgc_reg *)(GPC_BASE_ADDR + 0x880);
  299 + struct pgc_reg *pgc_core3 = (struct pgc_reg *)(GPC_BASE_ADDR + 0x8C0);
  300 + struct gpc_reg *gpc = (struct gpc_reg *)GPC_BASE_ADDR;
  301 +
  302 + writel(0x1, &pgc_core2->pgcr);
  303 + writel(0x1, &pgc_core3->pgcr);
  304 + writel(0xC, &gpc->cpu_pgc_dn_trg);
  305 + }
295 306 }
296 307  
297 308 #ifdef CONFIG_IMX_SEC_INIT