diff options
Diffstat (limited to 'src/soc/intel/common/block/fast_spi')
| -rw-r--r-- | src/soc/intel/common/block/fast_spi/fast_spi.c | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/src/soc/intel/common/block/fast_spi/fast_spi.c b/src/soc/intel/common/block/fast_spi/fast_spi.c index 1ef929c77c..dd21143798 100644 --- a/src/soc/intel/common/block/fast_spi/fast_spi.c +++ b/src/soc/intel/common/block/fast_spi/fast_spi.c @@ -67,7 +67,7 @@ void fast_spi_init(void) } /* - * Set FAST_SPIBAR BIOS Control BILD bit. + * Set FAST_SPIBAR BIOS Control register based on input bit field. */ static void fast_spi_set_bios_control_reg(uint8_t bios_cntl_bit) { @@ -81,11 +81,21 @@ static void fast_spi_set_bios_control_reg(uint8_t bios_cntl_bit) } /* + * Ensure an additional read back after performing lock down + */ +static void fast_spi_read_post_write(uint8_t reg) +{ + pci_read_config8(PCH_DEV_SPI, reg); +} + +/* * Set FAST_SPIBAR BIOS Control BILD bit. */ void fast_spi_set_bios_interface_lock_down(void) { fast_spi_set_bios_control_reg(SPIBAR_BIOS_CONTROL_BILD); + + fast_spi_read_post_write(SPIBAR_BIOS_CONTROL); } /* @@ -94,6 +104,9 @@ void fast_spi_set_bios_interface_lock_down(void) void fast_spi_set_lock_enable(void) { fast_spi_set_bios_control_reg(SPIBAR_BIOS_CONTROL_LOCK_ENABLE); + + + fast_spi_read_post_write(SPIBAR_BIOS_CONTROL); } /* @@ -102,6 +115,8 @@ void fast_spi_set_lock_enable(void) void fast_spi_set_eiss(void) { fast_spi_set_bios_control_reg(SPIBAR_BIOS_CONTROL_EISS); + + fast_spi_read_post_write(SPIBAR_BIOS_CONTROL); } /* |