diff options
Diffstat (limited to 'src/drivers/i2c/tpm')
| -rw-r--r-- | src/drivers/i2c/tpm/chip.c | 16 | ||||
| -rw-r--r-- | src/drivers/i2c/tpm/chip.h | 7 |
2 files changed, 23 insertions, 0 deletions
diff --git a/src/drivers/i2c/tpm/chip.c b/src/drivers/i2c/tpm/chip.c index 07791c33a4..3a2f8aa544 100644 --- a/src/drivers/i2c/tpm/chip.c +++ b/src/drivers/i2c/tpm/chip.c @@ -11,6 +11,7 @@ static void i2c_tpm_fill_ssdt(const struct device *dev) { + struct acpi_dp *dsd; struct drivers_i2c_tpm_config *config = dev->chip_info; const char *scope = acpi_device_scope(dev); struct acpi_i2c i2c = { @@ -47,6 +48,21 @@ static void i2c_tpm_fill_ssdt(const struct device *dev) acpigen_write_resourcetemplate_footer(); + /* _DSD, Device-Specific Data */ + dsd = acpi_dp_new_table("_DSD"); + switch (config->power_managed_mode) { + case TPM_FIRMWARE_POWER_MANAGED: + acpi_dp_add_integer(dsd, "firmware-power-managed", 1); + break; + case TPM_KERNEL_POWER_MANAGED: + acpi_dp_add_integer(dsd, "firmware-power-managed", 0); + break; + case TPM_DEFAULT_POWER_MANAGED: + default: + /* Leave firmware-power-managed unset */ + } + acpi_dp_write(dsd); + acpigen_pop_len(); /* Device */ acpigen_pop_len(); /* Scope */ diff --git a/src/drivers/i2c/tpm/chip.h b/src/drivers/i2c/tpm/chip.h index 0ab10d7560..4eac7e16f4 100644 --- a/src/drivers/i2c/tpm/chip.h +++ b/src/drivers/i2c/tpm/chip.h @@ -3,6 +3,12 @@ #include <acpi/acpi_device.h> #include <device/i2c_simple.h> +enum tpm_power_managed_mode { + TPM_DEFAULT_POWER_MANAGED = 0, + TPM_FIRMWARE_POWER_MANAGED, + TPM_KERNEL_POWER_MANAGED, +}; + struct drivers_i2c_tpm_config { const char *hid; /* ACPI _HID (required) */ const char *desc; /* Device Description */ @@ -10,4 +16,5 @@ struct drivers_i2c_tpm_config { enum i2c_speed speed; /* Bus speed in Hz, default is I2C_SPEED_FAST */ struct acpi_irq irq; /* Interrupt */ struct acpi_gpio irq_gpio; /* GPIO interrupt */ + enum tpm_power_managed_mode power_managed_mode; /* TPM power managed mode */ }; |