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elog: Do not attempt to init SPI

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This severs a dependency the eventlog code has on initializing
chipset/SoC SPI controller. Currently elog_init() calls spi_init()
as a catch-all. This worked for x86 since the SPI controller is only
used for one thing on existing platforms. As we add eventlogging
support to non-x86 platforms we need to consider the more generalized
case where the assumptions about how SPI works on x86 are no longer
valid.

BUG=none
BRANCH=none
Signed-off-by: David Hendricks <dhendrix@chromium.org>
TEST=built and booted on Link, Beltino and Rambi. See below for
"mosys eventlog list" output on Link showing boot and suspend/resume
events (including lid close/open) added successfully.

localhost ~ # mosys eventlog list
0 | 2014-04-14 13:52:44 | Log area cleared | 4096
1 | 2014-04-14 13:52:44 | System boot | 50
2 | 2014-04-14 13:52:44 | EC Event | Power Button
3 | 2014-04-14 13:52:44 | SUS Power Fail
4 | 2014-04-14 13:52:44 | System Reset
5 | 2014-04-14 13:52:44 | ACPI Wake | S5
6 | 2014-04-14 13:53:25 | ACPI Enter | S3
7 | 2014-04-14 13:53:35 | ACPI Wake | S3
8 | 2014-04-14 13:53:35 | Wake Source | RTC Alarm | 0
9 | 2014-04-14 13:53:49 | ACPI Enter | S3
10 | 2014-04-14 13:54:00 | EC Event | Lid Open
11 | 2014-04-14 13:54:00 | ACPI Wake | S3
12 | 2014-04-14 13:54:00 | Wake Source | GPIO | 15

Original-Change-Id: I26e25c0a856f7b8db5ab6b8e7e1acae291d2eadc
Original-Reviewed-on: https://chromium-review.googlesource.com/194526
Original-Reviewed-by: David Hendricks <dhendrix@chromium.org>
Original-Commit-Queue: David Hendricks <dhendrix@chromium.org>
Original-Tested-by: David Hendricks <dhendrix@chromium.org>
(cherry picked from commit 2971d20b6e)
Signed-off-by: Marc Jones <marc.jones@se-eng.com>

Change-Id: Ia5f2913fd8e4fee6e741e6d1e39d32bb86525cb3
Reviewed-on: http://review.coreboot.org/7831
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
This commit is contained in:
David Hendricks 2014-04-13 16:45:31 -07:00 • committed by Marc Jones
commit 9acbd6ff99
2 changed files with 2 additions and 2 deletions
Download patch file Download diff file Expand all files Collapse all files

3
src/drivers/elog/elog.c
View file

@ -546,8 +546,7 @@ int elog_init(void)
elog_debug("elog_init()\n");
/* Prepare SPI */
spi_init();
/* Probe SPI chip. SPI controller must already be initialized. */
elog_spi = spi_flash_probe(CONFIG_BOOT_MEDIA_SPI_BUS, 0);
if (!elog_spi) {
printk(BIOS_ERR, "ELOG: Unable to find SPI flash\n");

1
src/include/elog.h
View file

@ -148,6 +148,7 @@ struct elog_event_data_me_extended {
/* CPU Thermal Trip */
#define ELOG_TYPE_THERM_TRIP 0xa7
/* Eventlog backing storage must be initialized before calling elog_init(). */
extern int elog_init(void);
extern int elog_clear(void);
extern void elog_add_event_raw(u8 event_type, void *data, u8 data_size);