src/soc/amd/mendocino/espi_util.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <amdblocks/spi.h>
   4 #include <soc/espi.h>
   5 #include <types.h>
   6
   7 #define ESPI_CNTRL_REGISTER     0x10 /* SPI register, not eSPI register! */
   8 #define  LOCK_SPIX10_BIT2       BIT(3)
   9 #define  ESPI_MUX_SPI1          BIT(2)
  10 #define  ROM_ADDR_WR_PROT       BIT(1)
  11 #define  DIS_ESPI_MASCTL_REG_WR BIT(0)
  12
  13 void espi_switch_to_spi1_pads(void)
  14 {
  15         uint8_t reg = spi_read8(ESPI_CNTRL_REGISTER);
  16
  17         reg |= ESPI_MUX_SPI1;
  18
  19         spi_write8(ESPI_CNTRL_REGISTER, reg);
  20 }