Aaron Durbin (adurbin@chromium.org) just uploaded a new patch set to gerrit, which you can find at https://review.coreboot.org/17771
-gerrit
commit e0ec54490df08e286b0e9b7893da53dce56b9642 Author: Aaron Durbin adurbin@chromium.org Date: Wed Dec 7 17:34:06 2016 -0600
mainboard/google/reef: add board SKU'ing support
There are 2 gpios on reef-like boards that can be composed into a SKU. Add support for identifying the SKU value using the base 3 gpio logic. Also export the SKU information to the SMBIOS type 1 table.
BUG=chrome-os-partner:59887,chrome-os-partner:60494 BRANCH=reef
Change-Id: I8bb94207b0b7833d758054a817b655e248f1b239 Signed-off-by: Aaron Durbin adurbin@chromium.org --- src/mainboard/google/reef/mainboard.c | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+)
diff --git a/src/mainboard/google/reef/mainboard.c b/src/mainboard/google/reef/mainboard.c index 4425c01..e350df2 100644 --- a/src/mainboard/google/reef/mainboard.c +++ b/src/mainboard/google/reef/mainboard.c @@ -19,9 +19,12 @@ #include <console/console.h> #include <device/device.h> #include <ec/ec.h> +#include <gpio.h> #include <nhlt.h> +#include <smbios.h> #include <soc/gpio.h> #include <soc/nhlt.h> +#include <string.h> #include <vendorcode/google/chromeos/chromeos.h> #include <variant/ec.h> #include <variant/gpio.h> @@ -41,6 +44,35 @@ static void mainboard_init(void *chip_info) mainboard_ec_init(); }
+/* + * There are 2 pins on reef-like boards that can be used for SKU'ing + * board differences. They each have optional stuffing for a pullup and + * a pulldown. This way we can generate 9 different values with the + * 2 pins. + */ +static int board_sku(void) +{ + static int board_sku_num = -1; + gpio_t board_sku_gpios[] = { + [1] = GPIO_17, [0] = GPIO_16, + }; + const size_t num = ARRAY_SIZE(board_sku_gpios); + + if (board_sku_num < 0) + board_sku_num = gpio_base3_value(board_sku_gpios, num); + + return board_sku_num; +} + +const char *smbios_mainboard_sku(void) +{ + static char sku_str[5]; /* sku[0-8] */ + + snprintf(sku_str, sizeof(sku_str), "sku%d", board_sku()); + + return sku_str; +} + void __attribute__((weak)) variant_nhlt_oem_overrides(const char **oem_id, const char **oem_table_id, uint32_t *oem_revision)