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From 9d2d9b9db7796a49d03ac8b19dfbdefbe840c506 Mon Sep 17 00:00:00 2001
From: Jae Hyun Yoo <jae.hyun.yoo@intel.com>
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 <jae.hyun.yoo@intel.com>
---
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
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