Aaron Durbin (adurbin@google.com) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/4995
-gerrit
commit 6e5ce30f8dab98768d7c2e9d2367ddda6e4a43a9 Author: Aaron Durbin adurbin@chromium.org Date: Mon Dec 9 13:41:32 2013 -0600
rambi: export SPI write-protect GPIO correctly
Bay Trail has 3 banks of gpios. Therefore, in order to properly identify a gpio the specific bank number as well as the GPIO within that bank is needed. The SPI write-protect GPIO is GPIO 6 within the SUS bank (offset 0x2000).
BUG=chrome-os-partner:24324 BUG=chrome-os-partner:24408 BRANCH=None TEST=Built and booted. Looked at GPIO sysfs in the chromeos_acpi directory.
Change-Id: Ic51b5abe3bacf6cf9b6a90cf666f1a63b098a0e3 Signed-off-by: Aaron Durbin adurbin@chromium.org Reviewed-on: https://chromium-review.googlesource.com/179195 --- src/mainboard/google/rambi/acpi/chromeos.asl | 18 +++++++++++++++--- 1 file changed, 15 insertions(+), 3 deletions(-)
diff --git a/src/mainboard/google/rambi/acpi/chromeos.asl b/src/mainboard/google/rambi/acpi/chromeos.asl index 40ffcf0..e748fb8 100644 --- a/src/mainboard/google/rambi/acpi/chromeos.asl +++ b/src/mainboard/google/rambi/acpi/chromeos.asl @@ -17,8 +17,20 @@ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
+/* + * Fields are in the following order. + * - Type: recovery = 1 developer mode = 2 write protect = 3 + * - Active Level - if -1 not a valid gpio + * - GPIO number encoding - if -1 not a valid gpio + * - Chipset Name + * + * Note: On Bay Trail we need to encode gpios within the 3 separate banks + * with the MMIO offset of each banks space. e.g. GPIO_SUS[8] would be encoded + * as 0x2008 where the SUS offset (IO_BASE_OFFSET_GPSSUS) is 0x2000. + */ + Name(OIPG, Package() { - Package () { 0x0001, 0, 0xFF, "LynxPoint" }, // recovery - Package () { 0x0002, 0, 0xFF, "LynxPoint" }, // developer - Package () { 0x0003, 0, 0xFF, "LynxPoint" }, // firmware write protect + // No physical recovery button + Package () { 0x0001, 0, 0xFFFFFFFF, "BayTrail" }, + Package () { 0x0003, 1, 0x2006, "BayTrail" }, })