diff options
| author | Raul E Rangel <rrangel@chromium.org> | 2018-06-28 16:31:45 -0600 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2018-07-02 07:35:20 +0000 |
| commit | 9abc3fe9705764904b6439672cefc859ca3ab278 (patch) | |
| tree | 27d96c72e31fcd846920c1bb57260cf911928f30 /src/soc/amd/stoneyridge/southbridge.c | |
| parent | 5b058233882eefc100e4ca49b4bdbedffe395356 (diff) | |
stoneyridge: Enable legacy IO
Legacy IO enables access to RTC IO 0x70-0x73. This is needed for CMOS to
function correctly.
BUG=b:110817463
TEST=ran firmware_CorruptFwSigB on grunt
Change-Id: I533226ba764f567e348577d7fcf6ebe43336609a
Signed-off-by: Raul E Rangel <rrangel@chromium.org>
Reviewed-on: https://review.coreboot.org/27268
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin Roth <martinroth@google.com>
Diffstat (limited to 'src/soc/amd/stoneyridge/southbridge.c')
| -rw-r--r-- | src/soc/amd/stoneyridge/southbridge.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/src/soc/amd/stoneyridge/southbridge.c b/src/soc/amd/stoneyridge/southbridge.c index 591a8f7c9f..18e6c6c59d 100644 --- a/src/soc/amd/stoneyridge/southbridge.c +++ b/src/soc/amd/stoneyridge/southbridge.c @@ -375,6 +375,13 @@ static void sb_enable_cf9_io(void) pm_write32(PM_DECODE_EN, reg | CF9_IO_EN); } +static void sb_enable_legacy_io(void) +{ + uint32_t reg = pm_read32(PM_DECODE_EN); + + pm_write32(PM_DECODE_EN, reg | LEGACY_IO_EN); +} + void sb_clk_output_48Mhz(void) { u32 ctrl; @@ -550,6 +557,7 @@ void bootblock_fch_early_init(void) sb_disable_4dw_burst(); /* Must be disabled on CZ(ST) */ sb_acpi_mmio_decode(); sb_enable_cf9_io(); + sb_enable_legacy_io(); enable_aoac_devices(); } |