src/mainboard/asus/maximus_iv_gene-z/early_init.c

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2
   3 #include <bootblock_common.h>
   4 #include <device/pnp_ops.h>
   5 #include <superio/nuvoton/common/nuvoton.h>
   6 #include <superio/nuvoton/nct6776/nct6776.h>
   7
   8 void bootblock_mainboard_early_init(void)
   9 {
  10         static const pnp_devfn_t GLOBAL_PSEUDO_DEV = PNP_DEV(0x2e, 0);
  11         static const pnp_devfn_t ACPI_DEV = PNP_DEV(0x2e, NCT6776_ACPI);
  12
  13         nuvoton_pnp_enter_conf_state(GLOBAL_PSEUDO_DEV);
  14
  15         /* Select HWM/LED functions instead of floppy functions. */
  16         pnp_write_config(GLOBAL_PSEUDO_DEV, 0x1c, 0x03);
  17         pnp_write_config(GLOBAL_PSEUDO_DEV, 0x24, 0x24);
  18
  19         /* Power RAM in S3. */
  20         pnp_set_logical_device(ACPI_DEV);
  21         pnp_write_config(ACPI_DEV, 0xe4, 0x10);
  22
  23         nuvoton_pnp_exit_conf_state(GLOBAL_PSEUDO_DEV);
  24 }