From 9d2d9b9db7796a49d03ac8b19dfbdefbe840c506 Mon Sep 17 00:00:00 2001 From: Jae Hyun Yoo Date: Wed, 25 Mar 2020 15:04:26 -0700 Subject: [PATCH] AST2600: Add TPM pulse trigger This commit adds TPM pulse trigger into u-boot booting. Signed-off-by: Jae Hyun Yoo --- board/aspeed/ast2600_intel/intel.c | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+) diff --git a/board/aspeed/ast2600_intel/intel.c b/board/aspeed/ast2600_intel/intel.c index 04fd450d14fc..34b37cc24f91 100644 --- a/board/aspeed/ast2600_intel/intel.c +++ b/board/aspeed/ast2600_intel/intel.c @@ -35,6 +35,31 @@ int gpio_abort(void) return value <= 0 ? 0 : 1; } +/* use GPIOC2 on intel boards */ +#define TPM_EN_GPIO "gpio@1e78000018" + +int enable_onboard_tpm(void) +{ + struct gpio_desc desc; + int ret; + + ret = dm_gpio_lookup_name(TPM_EN_GPIO, &desc); + if (ret) + return ret; + ret = dm_gpio_request(&desc, "tpm_en_pulse"); + if (ret) + return ret; + if (dm_gpio_is_valid(&desc)) { + dm_gpio_set_value(&desc, 1); + mdelay(50); + dm_gpio_set_value(&desc, 0); + printf("TPM: Pulse triggered\n"); + } + dm_gpio_free(desc.dev, &desc); + + return ret; +} + #define SCU_BASE 0x1E6E2000 #define SCU_338 0x338 //Generate UART 24 MHz Reference from UXCLK #define SCU_33C 0x33c //Generate UART 24 MHz Reference from HUXCLK @@ -234,6 +259,8 @@ int board_early_init_r(void) espi_init(); + (void) enable_onboard_tpm(); + return 0; } -- 2.7.4