tree 8c51e7550fb23f9a0c6ebea19053bd0a248f7c1d
parent 0600aa64c3d140b3e561c508d73b50afabe7e990
author Mario Scheithauer <mario.scheithauer@siemens.com> 1686748616 +0200
committer Jakub Czapiga <jacz@semihalf.com> 1687164405 +0000

soc/intel/apollolake: Fix FSP SATA speed limit configuraion

With commit f165bbdcf043 ("soc/intel/apollolake: Make SATA speed limit
configurable") came the expansion to adjust the SATA speed.
Unfortunately, APL FSP-S sets only the default value, so Gen 3, and
ignores the passing parameter value. Since the corresponding register
entry can only be changed once, the setting must be made on coreboot
side before FSP-S is called. This patch fixes the SATA speed
configuration for Apollo Lake CPUs.

Link to Intel Pentium and Celeron N- and J- series datasheet volume 2:
https://web.archive.org/web/20230614130311/https://www.intel.com/content/www/us/en/content-details/334818/intel-pentium-and-celeron-processor-n-and-j-series-datasheet-volume-2.html

BUG=none
TEST=Boot into Linux and check SATA configuration via dmesg

ahci 0000:00:12.0: AHCI 0001.0301 32 slots 1 ports 3 Gbps 0x1 impl SATA
mode
ata1: SATA max UDMA/133 abar m2048@0x9872a000 port 0x9872a100 irq 126
ata1: SATA link up 3.0 Gbps (SStatus 123 SControl 300)

Change-Id: I6f55f40941fa618e7de13a5cefe9e17ae34c5c99
Signed-off-by: Mario Scheithauer <mario.scheithauer@siemens.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/75820
Reviewed-by: Felix Singer <service+coreboot-gerrit@felixsinger.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>