diff options
Diffstat (limited to 'src/mainboard/google/volteer/variants')
4 files changed, 42 insertions, 0 deletions
diff --git a/src/mainboard/google/volteer/variants/baseboard/include/baseboard/variants.h b/src/mainboard/google/volteer/variants/baseboard/include/baseboard/variants.h index 84081983c3..4d5dc87cb9 100644 --- a/src/mainboard/google/volteer/variants/baseboard/include/baseboard/variants.h +++ b/src/mainboard/google/volteer/variants/baseboard/include/baseboard/variants.h @@ -21,4 +21,7 @@ const struct cros_gpio *variant_cros_gpios(size_t *num); const struct ddr_memory_cfg *variant_memory_params(void); int variant_memory_sku(void); +/* Modify devictree settings during ramstage. */ +void variant_devtree_update(void); + #endif /* __BASEBOARD_VARIANTS_H__ */ diff --git a/src/mainboard/google/volteer/variants/volteer2/Makefile.inc b/src/mainboard/google/volteer/variants/volteer2/Makefile.inc index 13269db5ec..04af3aec1a 100644 --- a/src/mainboard/google/volteer/variants/volteer2/Makefile.inc +++ b/src/mainboard/google/volteer/variants/volteer2/Makefile.inc @@ -3,3 +3,4 @@ bootblock-y += gpio.c ramstage-y += gpio.c +ramstage-y += variant.c diff --git a/src/mainboard/google/volteer/variants/volteer2/overridetree.cb b/src/mainboard/google/volteer/variants/volteer2/overridetree.cb index a1012a665a..916777c0a3 100644 --- a/src/mainboard/google/volteer/variants/volteer2/overridetree.cb +++ b/src/mainboard/google/volteer/variants/volteer2/overridetree.cb @@ -201,6 +201,11 @@ chip soc/intel/tigerlake register "key.label" = ""pen_eject"" device generic 0 on end end + chip drivers/i2c/tpm + register "hid" = ""GOOG0005"" + register "irq" = "ACPI_IRQ_EDGE_LOW(GPP_C21_IRQ)" + device i2c 50 off end + end end device ref i2c2 on chip drivers/i2c/sx9310 diff --git a/src/mainboard/google/volteer/variants/volteer2/variant.c b/src/mainboard/google/volteer/variants/volteer2/variant.c new file mode 100644 index 0000000000..057bb8ad65 --- /dev/null +++ b/src/mainboard/google/volteer/variants/volteer2/variant.c @@ -0,0 +1,33 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ + +#include <baseboard/variants.h> +#include <soc/pci_devs.h> +#include <acpi/acpi_device.h> + +extern struct chip_operations drivers_i2c_tpm_ops; + +static bool match_i2c_tpm(DEVTREE_CONST struct device *dev) +{ + return dev->chip_ops == &drivers_i2c_tpm_ops; +} + +/* + * This function runs only on the volteer_ti50 variant, which has the GSC on a + * reworked I2C bus. + */ +static void devtree_enable_i2c_tpm(void) +{ + struct device *spi_tpm = pcidev_path_on_root(PCH_DEVFN_GSPI0)->link_list->children; + struct device *i2c_tpm = dev_find_matching_device_on_bus( + pcidev_path_on_root(PCH_DEVFN_I2C1)->link_list, match_i2c_tpm); + if (!i2c_tpm || !spi_tpm) + return; + spi_tpm->enabled = 0; + i2c_tpm->enabled = 1; +} + +void variant_devtree_update(void) +{ + if (CONFIG(MAINBOARD_HAS_I2C_TPM_CR50)) + devtree_enable_i2c_tpm(); +} |