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sb/intel/i82371eb: Drop unneeded PM2 settings from FADT 

The PM2_CNT register block is not present on this southbridge, according
to comments on the code. As per the ACPI specification, version 6.3,
section 4.8.1.3 (PM2 Control Register):

 This register block is optional, if not supported its block pointer and
 length contain a value of zero.

Since the FADT struct defaults to zero in coreboot, we don't need to do
anything to indicate PM2_CNT is not supported. So, drop unneeded values.

Change-Id: Ib3ff0fd9e0725f61c38e60ba56b95e6e77b0b1ed
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/43382
Reviewed-by: Patrick Rudolph <siro@das-labor.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
This commit is contained in:
Angel Pons 2020-07-12 21:27:46 +02:00
parent 192b57cc8b
commit 4787f2953c
1 changed files with 0 additions and 9 deletions
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9
src/southbridge/intel/i82371eb/fadt.c
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@ -27,14 +27,12 @@ void acpi_fill_fadt(acpi_fadt_t *fadt)
fadt->pm1a_evt_blk = DEFAULT_PMBASE;
fadt->pm1a_cnt_blk = DEFAULT_PMBASE + PMCNTRL;
fadt->pm2_cnt_blk = 0;
fadt->pm_tmr_blk = DEFAULT_PMBASE + PMTMR;
fadt->gpe0_blk = DEFAULT_PMBASE + GPSTS;
/* *_len define register width in bytes */
fadt->pm1_evt_len = 4;
fadt->pm1_cnt_len = 2;
fadt->pm2_cnt_len = 0; /* not supported */
fadt->pm_tmr_len = 4;
fadt->gpe0_blk_len = 4;
@ -129,13 +127,6 @@ void acpi_fill_fadt(acpi_fadt_t *fadt)
fadt->x_pm1a_cnt_blk.addrl = fadt->pm1a_cnt_blk;
fadt->x_pm1a_cnt_blk.addrh = 0x0;
fadt->x_pm2_cnt_blk.space_id = 1;
fadt->x_pm2_cnt_blk.bit_width = fadt->pm2_cnt_len * 8;
fadt->x_pm2_cnt_blk.bit_offset = 0;
fadt->x_pm2_cnt_blk.access_size = 0;
fadt->x_pm2_cnt_blk.addrl = fadt->pm2_cnt_blk;
fadt->x_pm2_cnt_blk.addrh = 0x0;
fadt->x_pm_tmr_blk.space_id = 1;
fadt->x_pm_tmr_blk.bit_width = fadt->pm_tmr_len * 8;
fadt->x_pm_tmr_blk.bit_offset = 0;