diff options
Diffstat (limited to 'src/mainboard/google/storm')
| -rw-r--r-- | src/mainboard/google/storm/mainboard.c | 23 |
1 files changed, 22 insertions, 1 deletions
diff --git a/src/mainboard/google/storm/mainboard.c b/src/mainboard/google/storm/mainboard.c index 8982f919ae..ded423aa9f 100644 --- a/src/mainboard/google/storm/mainboard.c +++ b/src/mainboard/google/storm/mainboard.c @@ -18,10 +18,12 @@ */ #include <arch/cache.h> +#include <boardid.h> #include <boot/coreboot_tables.h> #include <console/console.h> -#include <device/device.h> #include <delay.h> +#include <device/device.h> +#include <gpiolib.h> #include <string.h> #include <soc/qualcomm/ipq806x/include/clock.h> @@ -71,10 +73,29 @@ static void setup_mmu(void) dcache_mmu_enable(); } +#define TPM_RESET_GPIO 22 +static void setup_tpm(void) +{ + if (board_id() != 0) + return; /* Only proto0 have TPM reset connected to GPIO22 */ + + gpio_tlmm_config_set(TPM_RESET_GPIO, FUNC_SEL_GPIO, GPIO_PULL_UP, + GPIO_4MA, GPIO_ENABLE); + /* + * Generate a reset pulse. The spec calls for 80 us minimum, let's + * make it twice as long. If the output was driven low originally, the + * reset pulse will be even longer. + */ + gpio_set_out_value(TPM_RESET_GPIO, 0); + udelay(160); + gpio_set_out_value(TPM_RESET_GPIO, 1); +} + static void mainboard_init(device_t dev) { setup_mmu(); setup_usb(); + setup_tpm(); } static void mainboard_enable(device_t dev) |