diff options
| author | Jon Murphy <jpmurphy@google.com> | 2023-03-29 18:51:12 -0600 |
|---|---|---|
| committer | Felix Held <felix-coreboot@felixheld.de> | 2023-04-21 13:46:09 +0000 |
| commit | 1236b333b42c8376d672093456e6485e7cde5bc4 (patch) | |
| tree | 79d512d5e1059f64d7e27e83c58948bc19a0ecb6 /src/mainboard/google/myst/variants | |
| parent | 79b864958338ac682f27d74f0fac2ae26b9a7a20 (diff) | |
mb/google/myst: Enable AP <-> GSC communication
Configure GSC I2C and Interrupt GPIOs during the early initialization.
Add devicetree configuration for GSC device and enable the required
config items.
BUG=b:275959717
TEST=builds
Change-Id: I6e235356b252a7b68a42da128ffd3189a829f117
Signed-off-by: Jon Murphy <jpmurphy@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/74111
Reviewed-by: Eric Lai <eric_lai@quanta.corp-partner.google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Diffstat (limited to 'src/mainboard/google/myst/variants')
3 files changed, 26 insertions, 1 deletions
diff --git a/src/mainboard/google/myst/variants/baseboard/devicetree.cb b/src/mainboard/google/myst/variants/baseboard/devicetree.cb index 466b2dcc1b..085e464e8f 100644 --- a/src/mainboard/google/myst/variants/baseboard/devicetree.cb +++ b/src/mainboard/google/myst/variants/baseboard/devicetree.cb @@ -186,6 +186,13 @@ chip soc/amd/phoenix device ref uart_0 on end # UART0 device ref i2c_0 on end device ref i2c_1 on end - device ref i2c_2 on end + device ref i2c_2 on + chip drivers/i2c/tpm + register "hid" = ""GOOG0005"" + register "desc" = ""Ti50 TPM"" + register "irq_gpio" = "ACPI_GPIO_IRQ_EDGE_LOW(GPIO_84)" + device i2c 50 alias ti50 on end + end + end device ref i2c_3 on end end # chip soc/amd/phoenix diff --git a/src/mainboard/google/myst/variants/baseboard/gpio.c b/src/mainboard/google/myst/variants/baseboard/gpio.c index b2eccfff6e..56b814309c 100644 --- a/src/mainboard/google/myst/variants/baseboard/gpio.c +++ b/src/mainboard/google/myst/variants/baseboard/gpio.c @@ -168,6 +168,15 @@ static const struct soc_amd_gpio base_gpio_table[] = { PAD_GPO(GPIO_157, HIGH), }; +static const struct soc_amd_gpio tpm_gpio_table[] = { + /* I2C2_SCL */ + PAD_NF(GPIO_113, I2C2_SCL, PULL_NONE), + /* I2C2_SDA */ + PAD_NF(GPIO_114, I2C2_SDA, PULL_NONE), + /* GSC_SOC_INT_L */ + PAD_INT(GPIO_84, PULL_NONE, EDGE_LOW, STATUS_DELIVERY), +}; + /* GPIO configuration in bootblock */ static const struct soc_amd_gpio bootblock_gpio_table[] = { /* TODO(b/275965982): Fill bootblock gpio configuration */ @@ -208,6 +217,12 @@ void variant_espi_gpio_table(const struct soc_amd_gpio **gpio, size_t *size) *gpio = espi_gpio_table; } +__weak void variant_tpm_gpio_table(const struct soc_amd_gpio **gpio, size_t *size) +{ + *size = ARRAY_SIZE(tpm_gpio_table); + *gpio = tpm_gpio_table; +} + __weak void variant_override_gpio_table(const struct soc_amd_gpio **gpio, size_t *size) { *size = 0; diff --git a/src/mainboard/google/myst/variants/baseboard/include/baseboard/variants.h b/src/mainboard/google/myst/variants/baseboard/include/baseboard/variants.h index a39d2bf742..d5c251369e 100644 --- a/src/mainboard/google/myst/variants/baseboard/include/baseboard/variants.h +++ b/src/mainboard/google/myst/variants/baseboard/include/baseboard/variants.h @@ -21,4 +21,7 @@ void variant_espi_gpio_table(const struct soc_amd_gpio **gpio, size_t *size); */ void variant_override_gpio_table(const struct soc_amd_gpio **gpio, size_t *size); +/* This function provides GPIO settings for TPM i2c bus. */ +void variant_tpm_gpio_table(const struct soc_amd_gpio **gpio, size_t *size); + #endif /* __BASEBOARD_VARIANTS_H__ */ |