coreboot/default: Update to 97bc693ab (2024-07-29)

Several patches are now merged upstream and no longer needed
in lbmk, such as the HP EliteBook 8560w patch, and related
patches. Some patches were changed, for example the Dell Latitude
ivb/snb laptops are now variants in coreboot, instead of being
individual ports; now they re-use the same base code.

This this, the corresponding files under config/submodules
have changed, for things like 3rdparty submodules e.g. libgfxinit,
and tarballs e.g. crossgcc.

This is long overdue, and will enable more boards to be added.
This newer revision will be used in the next release, and some
follow-up patches will merge these trees into default:

* coreboot/haswell
* coreboot/dell

Signed-off-by: Leah Rowe <leah@libreboot.org>

1 files changed, 0 insertions, 602 deletions

diff --git a/config/coreboot/default/patches/0042-mb-dell-optiplex_9020-Implement-late-HWM-initializat.patch b/config/coreboot/default/patches/0042-mb-dell-optiplex_9020-Implement-late-HWM-initializat.patch
deleted file mode 100644
index 37353e20..00000000
--- a/config/coreboot/default/patches/0042-mb-dell-optiplex_9020-Implement-late-HWM-initializat.patch
+++ /dev/null
@@ -1,602 +0,0 @@
-From c58e0fea2a4e591e5ecd8a1f376c3b3af0fbb306 Mon Sep 17 00:00:00 2001
-From: Mate Kukri <kukri.mate@gmail.com>
-Date: Thu, 18 Apr 2024 20:28:45 +0100
-Subject: [PATCH 1/1] mb/dell/optiplex_9020: Implement late HWM initialization
-
-There are 4 different chassis types specified by vendor firmware, each
-with a slightly different HWM configuration.
-
-The chassis type to use is determined at runtime by reading a set of
-4 PCH GPIOs: 70, 38, 17, and 1.
-
-Additionally vendor firmware also provides an option to run the fans at
-full speed. This is substituted with a coreboot nvram option in this
-implementation.
-
-This was tested to make fan control work on my OptiPlex 7020 SFF.
-
-NOTE: This is superficially similar to the OptiPlex 9010's SCH5545
-however the OptiPlex 9020's SCH5555 does not use externally
-programmed EC firmware.
-
-Change-Id: Ibdccd3fc7364e03e84ca606592928410624eed43
-Signed-off-by: Mate Kukri <kukri.mate@gmail.com>
----
- src/mainboard/dell/optiplex_9020/Makefile.inc |   3 +-
- src/mainboard/dell/optiplex_9020/bootblock.c  |  25 +-
- src/mainboard/dell/optiplex_9020/cmos.default |   1 +
- src/mainboard/dell/optiplex_9020/cmos.layout  |   5 +-
- src/mainboard/dell/optiplex_9020/mainboard.c  | 387 ++++++++++++++++++
- src/mainboard/dell/optiplex_9020/sch5555_ec.c |  54 +++
- src/mainboard/dell/optiplex_9020/sch5555_ec.h |  10 +
- 7 files changed, 463 insertions(+), 22 deletions(-)
- create mode 100644 src/mainboard/dell/optiplex_9020/sch5555_ec.c
- create mode 100644 src/mainboard/dell/optiplex_9020/sch5555_ec.h
-
-diff --git a/src/mainboard/dell/optiplex_9020/Makefile.inc b/src/mainboard/dell/optiplex_9020/Makefile.inc
-index 6ca2f2afaa..08e2e53577 100644
---- a/src/mainboard/dell/optiplex_9020/Makefile.inc
-+++ b/src/mainboard/dell/optiplex_9020/Makefile.inc
-@@ -2,4 +2,5 @@
- 
- romstage-y += gpio.c
- ramstage-$(CONFIG_MAINBOARD_USE_LIBGFXINIT) += gma-mainboard.ads
--bootblock-y += bootblock.c
-+ramstage-y += sch5555_ec.c
-+bootblock-y += bootblock.c sch5555_ec.c
-diff --git a/src/mainboard/dell/optiplex_9020/bootblock.c b/src/mainboard/dell/optiplex_9020/bootblock.c
-index 2837cf9cf1..e5e759273e 100644
---- a/src/mainboard/dell/optiplex_9020/bootblock.c
-+++ b/src/mainboard/dell/optiplex_9020/bootblock.c
-@@ -4,29 +4,14 @@
- #include <device/pnp_ops.h>
- #include <superio/smsc/sch555x/sch555x.h>
- #include <southbridge/intel/lynxpoint/pch.h>
--
--static void ec_write(uint8_t addr1, uint16_t addr2, uint8_t val)
--{
--	// Clear EC-to-Host mailbox
--	uint8_t tmp = inb(SCH555x_EMI_IOBASE + 1);
--	outb(tmp, SCH555x_EMI_IOBASE + 1);
--
--	// Send address and value to the EC
--	sch555x_emi_write16(0, (addr1 * 2) | 0x101);
--	sch555x_emi_write32(4, val | (addr2 << 16));
--
--	// Wait for acknowledgement message from EC
--	outb(1, SCH555x_EMI_IOBASE);
--	size_t timeout = 0;
--	do {} while (++timeout < 0xfff && (inb(SCH555x_EMI_IOBASE + 1) & 1) == 0);
--}
-+#include "sch5555_ec.h"
- 
- struct ec_init_entry {
- 	uint16_t addr;
- 	uint8_t val;
- };
- 
--static void ec_init(void)
-+static void bootblock_ec_init(void)
- {
- 	/*
- 	 * Tables from CORE_PEI
-@@ -108,9 +93,9 @@ void mainboard_config_superio(void)
- 	outb(0x01, SCH555x_RUNTIME_IOBASE + SCH555x_RUNTIME_UNK1);
- 	outb(0x0f, SCH555x_RUNTIME_IOBASE + SCH555x_RUNTIME_LED);
- 
--	// Magic EC init
--	ec_init();
-+	// Perform bootblock EC initialization
-+	bootblock_ec_init();
- 
--	// Magic EC init is needed for UART1 initialization to work
-+	// Bootblock EC initialization is required for UART1 to work
- 	sch555x_enable_serial(SERIAL_DEV, CONFIG_TTYS0_BASE);
- }
-diff --git a/src/mainboard/dell/optiplex_9020/cmos.default b/src/mainboard/dell/optiplex_9020/cmos.default
-index 7bccc80e51..1909abcb9f 100644
---- a/src/mainboard/dell/optiplex_9020/cmos.default
-+++ b/src/mainboard/dell/optiplex_9020/cmos.default
-@@ -3,3 +3,4 @@ debug_level=Debug
- nmi=Disable
- power_on_after_fail=Disable
- iommu=Disable
-+fan_full_speed=Disable
-diff --git a/src/mainboard/dell/optiplex_9020/cmos.layout b/src/mainboard/dell/optiplex_9020/cmos.layout
-index 72ff9c4bee..4a1496a878 100644
---- a/src/mainboard/dell/optiplex_9020/cmos.layout
-+++ b/src/mainboard/dell/optiplex_9020/cmos.layout
-@@ -22,7 +22,10 @@ entries
- 409	2	e	5	power_on_after_fail
- 
- # turn iommu on or off
--412	1	e	6	iommu
-+411	1	e	6	iommu
-+
-+# coreboot config options: EC
-+412	1	e	1	fan_full_speed
- 
- # coreboot config options: check sums
- 984	16	h	0	check_sum
-diff --git a/src/mainboard/dell/optiplex_9020/mainboard.c b/src/mainboard/dell/optiplex_9020/mainboard.c
-index c834fea5d3..0b7829c736 100644
---- a/src/mainboard/dell/optiplex_9020/mainboard.c
-+++ b/src/mainboard/dell/optiplex_9020/mainboard.c
-@@ -1,7 +1,12 @@
- /* SPDX-License-Identifier: GPL-2.0-only */
- 
-+#include <bootstate.h>
-+#include <cpu/x86/msr.h>
- #include <device/device.h>
- #include <drivers/intel/gma/int15.h>
-+#include <option.h>
-+#include <southbridge/intel/common/gpio.h>
-+#include "sch5555_ec.h"
- 
- static void mainboard_enable(struct device *dev)
- {
-@@ -13,3 +18,385 @@ static void mainboard_enable(struct device *dev)
- struct chip_operations mainboard_ops = {
- 	.enable_dev = mainboard_enable,
- };
-+
-+#define HWM_TAB_ADD_TEMP_TARGET	1
-+#define HWM_TAB_PKG_POWER_ANY	0xffff
-+#define CHASSIS_TYPE_UNKNOWN	0xff
-+
-+struct hwm_tab_entry {
-+	uint16_t addr;
-+	uint8_t val;
-+	uint8_t flags;
-+	uint16_t pkg_power;
-+};
-+
-+struct hwm_tab_entry HWM_TAB3[] = {
-+	{ 0x005, 0x33, 0, 0xffff },
-+	{ 0x018, 0x2f, 0, 0xffff },
-+	{ 0x019, 0x2f, 0, 0xffff },
-+	{ 0x01a, 0x2f, 0, 0xffff },
-+	{ 0x080, 0x00, 0, 0xffff },
-+	{ 0x081, 0x00, 0, 0xffff },
-+	{ 0x083, 0xbb, 0, 0xffff },
-+	{ 0x085, 0x8a, 0, 0x0010 },
-+	{ 0x086, 0x4c, 0, 0x0010 },
-+	{ 0x08a, 0x66, 0, 0x0010 },
-+	{ 0x08b, 0x5b, 0, 0x0010 },
-+	{ 0x090, 0x65, 0, 0xffff },
-+	{ 0x091, 0x70, 0, 0xffff },
-+	{ 0x092, 0x86, 0, 0xffff },
-+	{ 0x096, 0xa4, 0, 0xffff },
-+	{ 0x097, 0xa4, 0, 0xffff },
-+	{ 0x098, 0xa4, 0, 0xffff },
-+	{ 0x09b, 0xa4, 0, 0xffff },
-+	{ 0x0a0, 0x0e, 0, 0xffff },
-+	{ 0x0a1, 0x0e, 0, 0xffff },
-+	{ 0x0ae, 0x7c, 0, 0xffff },
-+	{ 0x0af, 0x86, 0, 0xffff },
-+	{ 0x0b0, 0x9a, 0, 0xffff },
-+	{ 0x0b3, 0x9a, 0, 0xffff },
-+	{ 0x0b6, 0x08, 0, 0xffff },
-+	{ 0x0b7, 0x08, 0, 0xffff },
-+	{ 0x0ea, 0x64, 0, 0x0020 },
-+	{ 0x0ea, 0x5c, 0, 0x0010 },
-+	{ 0x0ef, 0xff, 0, 0xffff },
-+	{ 0x0f8, 0x15, 0, 0xffff },
-+	{ 0x0f9, 0x00, 0, 0xffff },
-+	{ 0x0f0, 0x30, 0, 0xffff },
-+	{ 0x0fd, 0x01, 0, 0xffff },
-+	{ 0x1a1, 0x00, 0, 0xffff },
-+	{ 0x1a2, 0x00, 0, 0xffff },
-+	{ 0x1b1, 0x08, 0, 0xffff },
-+	{ 0x1be, 0x99, 0, 0xffff },
-+	{ 0x280, 0xa0, 0, 0x0010 },
-+	{ 0x281, 0x0f, 0, 0x0010 },
-+	{ 0x282, 0x03, 0, 0xffff },
-+	{ 0x283, 0x0a, 0, 0xffff },
-+	{ 0x284, 0x80, 0, 0xffff },
-+	{ 0x285, 0x03, 0, 0xffff },
-+	{ 0x288, 0x68, 0, 0x0010 },
-+	{ 0x289, 0x10, 0, 0x0010 },
-+	{ 0x28a, 0x03, 0, 0xffff },
-+	{ 0x28b, 0x0a, 0, 0xffff },
-+	{ 0x28c, 0x80, 0, 0xffff },
-+	{ 0x28d, 0x03, 0, 0xffff },
-+};
-+
-+struct hwm_tab_entry HWM_TAB4[] = {
-+	{ 0x005, 0x33, 0, 0xffff },
-+	{ 0x018, 0x2f, 0, 0xffff },
-+	{ 0x019, 0x2f, 0, 0xffff },
-+	{ 0x01a, 0x2f, 0, 0xffff },
-+	{ 0x080, 0x00, 0, 0xffff },
-+	{ 0x081, 0x00, 0, 0xffff },
-+	{ 0x083, 0xbb, 0, 0xffff },
-+	{ 0x085, 0x99, 0, 0x0020 },
-+	{ 0x085, 0xad, 0, 0x0010 },
-+	{ 0x086, 0x1c, 0, 0xffff },
-+	{ 0x08a, 0x39, 0, 0x0020 },
-+	{ 0x08a, 0x41, 0, 0x0010 },
-+	{ 0x08b, 0x76, 0, 0x0020 },
-+	{ 0x08b, 0x8b, 0, 0x0010 },
-+	{ 0x090, 0x5e, 0, 0xffff },
-+	{ 0x091, 0x5e, 0, 0xffff },
-+	{ 0x092, 0x86, 0, 0xffff },
-+	{ 0x096, 0xa4, 0, 0xffff },
-+	{ 0x097, 0xa4, 0, 0xffff },
-+	{ 0x098, 0xa4, 0, 0xffff },
-+	{ 0x09b, 0xa4, 0, 0xffff },
-+	{ 0x0a0, 0x0a, 0, 0xffff },
-+	{ 0x0a1, 0x0a, 0, 0xffff },
-+	{ 0x0ae, 0x7c, 0, 0xffff },
-+	{ 0x0af, 0x7c, 0, 0xffff },
-+	{ 0x0b0, 0x9a, 0, 0xffff },
-+	{ 0x0b3, 0x7c, 0, 0xffff },
-+	{ 0x0b6, 0x08, 0, 0xffff },
-+	{ 0x0b7, 0x08, 0, 0xffff },
-+	{ 0x0ea, 0x64, 0, 0x0020 },
-+	{ 0x0ea, 0x5c, 0, 0x0010 },
-+	{ 0x0ef, 0xff, 0, 0xffff },
-+	{ 0x0f8, 0x15, 0, 0xffff },
-+	{ 0x0f9, 0x00, 0, 0xffff },
-+	{ 0x0f0, 0x30, 0, 0xffff },
-+	{ 0x0fd, 0x01, 0, 0xffff },
-+	{ 0x1a1, 0x00, 0, 0xffff },
-+	{ 0x1a2, 0x00, 0, 0xffff },
-+	{ 0x1b1, 0x08, 0, 0xffff },
-+	{ 0x1be, 0x90, 0, 0xffff },
-+	{ 0x280, 0x94, 0, 0x0020 },
-+	{ 0x281, 0x11, 0, 0x0020 },
-+	{ 0x280, 0x94, 0, 0x0010 },
-+	{ 0x281, 0x11, 0, 0x0010 },
-+	{ 0x282, 0x03, 0, 0xffff },
-+	{ 0x283, 0x0a, 0, 0xffff },
-+	{ 0x284, 0x80, 0, 0xffff },
-+	{ 0x285, 0x03, 0, 0xffff },
-+	{ 0x288, 0x28, 0, 0x0020 },
-+	{ 0x289, 0x0a, 0, 0x0020 },
-+	{ 0x288, 0x28, 0, 0x0010 },
-+	{ 0x289, 0x0a, 0, 0x0010 },
-+	{ 0x28a, 0x03, 0, 0xffff },
-+	{ 0x28b, 0x0a, 0, 0xffff },
-+	{ 0x28c, 0x80, 0, 0xffff },
-+	{ 0x28d, 0x03, 0, 0xffff },
-+};
-+
-+struct hwm_tab_entry HWM_TAB5[] = {
-+	{ 0x005, 0x33, 0, 0xffff },
-+	{ 0x018, 0x2f, 0, 0xffff },
-+	{ 0x019, 0x2f, 0, 0xffff },
-+	{ 0x01a, 0x2f, 0, 0xffff },
-+	{ 0x080, 0x00, 0, 0xffff },
-+	{ 0x081, 0x00, 0, 0xffff },
-+	{ 0x083, 0xbb, 0, 0xffff },
-+	{ 0x085, 0x66, 0, 0x0020 },
-+	{ 0x085, 0x5d, 0, 0x0010 },
-+	{ 0x086, 0x1c, 0, 0xffff },
-+	{ 0x08a, 0x39, 0, 0x0020 },
-+	{ 0x08a, 0x41, 0, 0x0010 },
-+	{ 0x08b, 0x76, 0, 0x0020 },
-+	{ 0x08b, 0x80, 0, 0x0010 },
-+	{ 0x090, 0x5d, 0, 0x0020 },
-+	{ 0x090, 0x5e, 0, 0x0010 },
-+	{ 0x091, 0x5e, 0, 0xffff },
-+	{ 0x092, 0x86, 0, 0xffff },
-+	{ 0x096, 0xa4, 0, 0xffff },
-+	{ 0x097, 0xa4, 0, 0xffff },
-+	{ 0x098, 0xa3, 0, 0x0020 },
-+	{ 0x098, 0xa4, 0, 0x0010 },
-+	{ 0x09b, 0xa4, 0, 0xffff },
-+	{ 0x0a0, 0x08, 0, 0xffff },
-+	{ 0x0a1, 0x0a, 0, 0xffff },
-+	{ 0x0ae, 0x7c, 0, 0xffff },
-+	{ 0x0af, 0x7c, 0, 0xffff },
-+	{ 0x0b0, 0x9a, 0, 0xffff },
-+	{ 0x0b3, 0x7c, 0, 0xffff },
-+	{ 0x0b6, 0x08, 0, 0xffff },
-+	{ 0x0b7, 0x08, 0, 0xffff },
-+	{ 0x0ea, 0x64, 0, 0x0020 },
-+	{ 0x0ea, 0x5c, 0, 0x0010 },
-+	{ 0x0ef, 0xff, 0, 0xffff },
-+	{ 0x0f8, 0x15, 0, 0xffff },
-+	{ 0x0f9, 0x00, 0, 0xffff },
-+	{ 0x0f0, 0x30, 0, 0xffff },
-+	{ 0x0fd, 0x01, 0, 0xffff },
-+	{ 0x1a1, 0x00, 0, 0xffff },
-+	{ 0x1a2, 0x00, 0, 0xffff },
-+	{ 0x1b1, 0x08, 0, 0xffff },
-+	{ 0x1be, 0x98, 0, 0x0020 },
-+	{ 0x1be, 0x90, 0, 0x0010 },
-+	{ 0x280, 0x94, 0, 0x0020 },
-+	{ 0x281, 0x11, 0, 0x0020 },
-+	{ 0x280, 0x94, 0, 0x0010 },
-+	{ 0x281, 0x11, 0, 0x0010 },
-+	{ 0x282, 0x03, 0, 0xffff },
-+	{ 0x283, 0x0a, 0, 0xffff },
-+	{ 0x284, 0x80, 0, 0xffff },
-+	{ 0x285, 0x03, 0, 0xffff },
-+	{ 0x288, 0x28, 0, 0x0020 },
-+	{ 0x289, 0x0a, 0, 0x0020 },
-+	{ 0x288, 0x28, 0, 0x0010 },
-+	{ 0x289, 0x0a, 0, 0x0010 },
-+	{ 0x28a, 0x03, 0, 0xffff },
-+	{ 0x28b, 0x0a, 0, 0xffff },
-+	{ 0x28c, 0x80, 0, 0xffff },
-+	{ 0x28d, 0x03, 0, 0xffff },
-+};
-+
-+struct hwm_tab_entry HWM_TAB6[] = {
-+	{ 0x005, 0x33, 0, 0xffff },
-+	{ 0x018, 0x2f, 0, 0xffff },
-+	{ 0x019, 0x2f, 0, 0xffff },
-+	{ 0x01a, 0x2f, 0, 0xffff },
-+	{ 0x080, 0x00, 0, 0xffff },
-+	{ 0x081, 0x00, 0, 0xffff },
-+	{ 0x083, 0xbb, 0, 0xffff },
-+	{ 0x085, 0x98, 0, 0xffff },
-+	{ 0x086, 0x3c, 0, 0xffff },
-+	{ 0x08a, 0x39, 0, 0x0020 },
-+	{ 0x08a, 0x3d, 0, 0x0010 },
-+	{ 0x08b, 0x44, 0, 0x0020 },
-+	{ 0x08b, 0x51, 0, 0x0010 },
-+	{ 0x090, 0x61, 0, 0xffff },
-+	{ 0x091, 0x6d, 0, 0xffff },
-+	{ 0x092, 0x86, 0, 0xffff },
-+	{ 0x096, 0xa4, 0, 0xffff },
-+	{ 0x097, 0xa4, 0, 0xffff },
-+	{ 0x098, 0x9f, 0, 0x0020 },
-+	{ 0x098, 0xa4, 0, 0x0010 },
-+	{ 0x09b, 0xa4, 0, 0xffff },
-+	{ 0x0a0, 0x0e, 0, 0xffff },
-+	{ 0x0a1, 0x0e, 0, 0xffff },
-+	{ 0x0ae, 0x7c, 0, 0xffff },
-+	{ 0x0af, 0x7c, 0, 0xffff },
-+	{ 0x0b0, 0x9b, 0, 0x0020 },
-+	{ 0x0b0, 0x98, 0, 0x0010 },
-+	{ 0x0b3, 0x9a, 0, 0xffff },
-+	{ 0x0b6, 0x08, 0, 0xffff },
-+	{ 0x0b7, 0x08, 0, 0xffff },
-+	{ 0x0ea, 0x64, 0, 0x0020 },
-+	{ 0x0ea, 0x5c, 0, 0x0010 },
-+	{ 0x0ef, 0xff, 0, 0xffff },
-+	{ 0x0f8, 0x15, 0, 0xffff },
-+	{ 0x0f9, 0x00, 0, 0xffff },
-+	{ 0x0f0, 0x30, 0, 0xffff },
-+	{ 0x0fd, 0x01, 0, 0xffff },
-+	{ 0x1a1, 0x00, 0, 0xffff },
-+	{ 0x1a2, 0x00, 0, 0xffff },
-+	{ 0x1b1, 0x08, 0, 0xffff },
-+	{ 0x1be, 0x9a, 0, 0x0020 },
-+	{ 0x1be, 0x96, 0, 0x0010 },
-+	{ 0x280, 0x94, 0, 0x0020 },
-+	{ 0x281, 0x11, 0, 0x0020 },
-+	{ 0x280, 0x94, 0, 0x0010 },
-+	{ 0x281, 0x11, 0, 0x0010 },
-+	{ 0x282, 0x03, 0, 0xffff },
-+	{ 0x283, 0x0a, 0, 0xffff },
-+	{ 0x284, 0x80, 0, 0xffff },
-+	{ 0x285, 0x03, 0, 0xffff },
-+	{ 0x288, 0x94, 0, 0x0020 },
-+	{ 0x289, 0x11, 0, 0x0020 },
-+	{ 0x288, 0x94, 0, 0x0010 },
-+	{ 0x289, 0x11, 0, 0x0010 },
-+	{ 0x28a, 0x03, 0, 0xffff },
-+	{ 0x28b, 0x0a, 0, 0xffff },
-+	{ 0x28c, 0x80, 0, 0xffff },
-+	{ 0x28d, 0x03, 0, 0xffff },
-+};
-+
-+static uint8_t get_chassis_type(void)
-+{
-+	uint8_t gpio_chassis_type;
-+
-+	// Read chassis type from GPIO
-+	gpio_chassis_type = get_gpio(70) << 3 | get_gpio(38) << 2 |
-+			    get_gpio(17) << 1 | get_gpio(1);
-+
-+	printk(BIOS_DEBUG, "GPIO chassis type = %#x\n", gpio_chassis_type);
-+
-+	// Turn it into internal chassis index
-+	switch (gpio_chassis_type) {
-+	case 0x08:
-+	case 0x0a:
-+		return 4;
-+	case 0x0b:
-+		return 3;
-+	case 0x0c:
-+		return 5;
-+	case 0x0d: // SFF
-+	case 0x0e:
-+	case 0x0f:
-+		return 6;
-+	default:
-+		return CHASSIS_TYPE_UNKNOWN;
-+	}
-+
-+}
-+
-+static uint8_t get_temp_target(void)
-+{
-+	uint8_t val = rdmsr(0x1a2).lo >> 8 & 0xff;
-+	if (!val)
-+		val = 20;
-+	return 0x95 - val;
-+}
-+
-+static uint16_t get_pkg_power(void)
-+{
-+	uint8_t rapl_power_unit = rdmsr(0x606).lo & 0xf;
-+	if (rapl_power_unit)
-+		rapl_power_unit = 2 << (rapl_power_unit - 1);
-+	uint16_t pkg_power_info = rdmsr(0x614).lo & 0x7fff;
-+	if (pkg_power_info / rapl_power_unit > 0x41)
-+		return 32;
-+	else
-+		return 16;
-+}
-+
-+static void apply_hwm_tab(struct hwm_tab_entry *arr, size_t size)
-+{
-+	uint8_t temp_target = get_temp_target();
-+	uint16_t pkg_power = get_pkg_power();
-+
-+	printk(BIOS_DEBUG, "Temp target = %#x\n", temp_target);
-+	printk(BIOS_DEBUG, "Package power = %#x\n", pkg_power);
-+
-+	for (size_t i = 0; i < size; ++i) {
-+		// Skip entry if it doesn't apply for this package power
-+		if (arr[i].pkg_power != pkg_power &&
-+		    arr[i].pkg_power != HWM_TAB_PKG_POWER_ANY)
-+			continue;
-+
-+		uint8_t val = arr[i].val;
-+
-+		// Add temp target to value if requested (current tables never do)
-+		if (arr[i].flags & HWM_TAB_ADD_TEMP_TARGET)
-+			val += temp_target;
-+
-+		// Perform write
-+		ec_write(1, arr[i].addr, val);
-+
-+	}
-+}
-+
-+static void sch5555_ec_hwm_init(void *arg)
-+{
-+	uint8_t chassis_type, saved_2fc;
-+
-+	printk(BIOS_DEBUG, "OptiPlex 9020 late HWM init\n");
-+
-+	saved_2fc = ec_read(1, 0x2fc);
-+	ec_write(1, 0x2fc, 0xa0);
-+	ec_write(1, 0x2fd, 0x32);
-+
-+	chassis_type = get_chassis_type();
-+
-+	if (chassis_type != CHASSIS_TYPE_UNKNOWN) {
-+		printk(BIOS_DEBUG, "Chassis type = %#x\n", chassis_type);
-+	} else {
-+		printk(BIOS_DEBUG, "WARNING: Unknown chassis type\n");
-+	}
-+
-+	// Apply HWM table based on chassis type
-+	switch (chassis_type) {
-+	case 3:
-+		apply_hwm_tab(HWM_TAB3, ARRAY_SIZE(HWM_TAB3));
-+		break;
-+	case 4:
-+		apply_hwm_tab(HWM_TAB4, ARRAY_SIZE(HWM_TAB4));
-+		break;
-+	case 5:
-+		apply_hwm_tab(HWM_TAB5, ARRAY_SIZE(HWM_TAB5));
-+		break;
-+	case 6:
-+		apply_hwm_tab(HWM_TAB6, ARRAY_SIZE(HWM_TAB6));
-+		break;
-+	}
-+
-+	// NOTE: vendor firmware applies these when "max core address" > 2
-+	// i think this is always the case
-+	ec_write(1, 0x9e, 0x30);
-+	ec_write(1, 0xeb, ec_read(1, 0xea));
-+
-+	ec_write(1, 0x2fc, saved_2fc);
-+
-+	// Apply full speed fan config if requested or if the chassis type is unknown
-+	if (chassis_type == CHASSIS_TYPE_UNKNOWN || get_uint_option("fan_full_speed", 0)) {
-+		printk(BIOS_DEBUG, "Setting full fan speed\n");
-+		ec_write(1, 0x80, 0x60 | ec_read(1, 0x80));
-+		ec_write(1, 0x81, 0x60 | ec_read(1, 0x81));
-+	}
-+
-+	ec_read(1, 0xb8);
-+
-+	if ((chassis_type == 4 || chassis_type == 5) && ec_read(1, 0x26) == 0) {
-+		ec_write(1, 0xa0, ec_read(1, 0xa0) & 0xfb);
-+		ec_write(1, 0xa1, ec_read(1, 0xa1) & 0xfb);
-+		ec_write(1, 0xa2, ec_read(1, 0xa2) & 0xfb);
-+		ec_write(1, 0x8a, 0x99);
-+		ec_write(1, 0x8b, 0x47);
-+		ec_write(1, 0x8c, 0x91);
-+	}
-+}
-+
-+BOOT_STATE_INIT_ENTRY(BS_POST_DEVICE, BS_ON_EXIT, sch5555_ec_hwm_init, NULL);
-diff --git a/src/mainboard/dell/optiplex_9020/sch5555_ec.c b/src/mainboard/dell/optiplex_9020/sch5555_ec.c
-new file mode 100644
-index 0000000000..a1067ac063
---- /dev/null
-+++ b/src/mainboard/dell/optiplex_9020/sch5555_ec.c
-@@ -0,0 +1,54 @@
-+/* SPDX-License-Identifier: GPL-2.0-only */
-+
-+#include <arch/io.h>
-+#include <device/pnp_ops.h>
-+#include <superio/smsc/sch555x/sch555x.h>
-+#include "sch5555_ec.h"
-+
-+uint8_t ec_read(uint8_t addr1, uint16_t addr2)
-+{
-+	// clear ec-to-host mailbox
-+	uint8_t tmp = inb(SCH555x_EMI_IOBASE + 1);
-+	outb(tmp, SCH555x_EMI_IOBASE + 1);
-+
-+	// send address
-+	outw(0 | 0x8001, SCH555x_EMI_IOBASE + 2);
-+	outw((addr1 * 2) | 0x100, SCH555x_EMI_IOBASE + 4);
-+
-+	outw(4 | 0x8002, SCH555x_EMI_IOBASE + 2);
-+	outl(addr2 << 16, SCH555x_EMI_IOBASE + 4);
-+
-+	// send message to ec
-+	outb(1, SCH555x_EMI_IOBASE);
-+
-+	// wait for ack
-+	for (size_t retry = 0; retry < 0xfff; ++retry)
-+		if (inb(SCH555x_EMI_IOBASE + 1) & 1)
-+			break;
-+
-+	// read result
-+	outw(4 | 0x8000, SCH555x_EMI_IOBASE + 2);
-+	return inb(SCH555x_EMI_IOBASE + 4);
-+}
-+
-+void ec_write(uint8_t addr1, uint16_t addr2, uint8_t val)
-+{
-+	// clear ec-to-host mailbox
-+	uint8_t tmp = inb(SCH555x_EMI_IOBASE + 1);
-+	outb(tmp, SCH555x_EMI_IOBASE + 1);
-+
-+	// send address and value
-+	outw(0 | 0x8001, SCH555x_EMI_IOBASE + 2);
-+	outw((addr1 * 2) | 0x101, SCH555x_EMI_IOBASE + 4);
-+
-+	outw(4 | 0x8002, SCH555x_EMI_IOBASE + 2);
-+	outl(val | (addr2 << 16), SCH555x_EMI_IOBASE + 4);
-+
-+	// send message to ec
-+	outb(1, SCH555x_EMI_IOBASE);
-+
-+	// wait for ack
-+	for (size_t retry = 0; retry < 0xfff; ++retry)
-+		if (inb(SCH555x_EMI_IOBASE + 1) & 1)
-+			break;
-+}
-diff --git a/src/mainboard/dell/optiplex_9020/sch5555_ec.h b/src/mainboard/dell/optiplex_9020/sch5555_ec.h
-new file mode 100644
-index 0000000000..7e399e8e74
---- /dev/null
-+++ b/src/mainboard/dell/optiplex_9020/sch5555_ec.h
-@@ -0,0 +1,10 @@
-+/* SPDX-License-Identifier: GPL-2.0-only */
-+
-+#ifndef __SCH5555_EC_H__
-+#define __SCH5555_EC_H__
-+
-+uint8_t ec_read(uint8_t addr1, uint16_t addr2);
-+
-+void ec_write(uint8_t addr1, uint16_t addr2, uint8_t val);
-+
-+#endif
--- 
-2.39.2
-