diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/mainboard/google/brya/variants/kuldax/Makefile.inc | 1 | ||||
| -rw-r--r-- | src/mainboard/google/brya/variants/kuldax/ramstage.c | 60 |
2 files changed, 61 insertions, 0 deletions
diff --git a/src/mainboard/google/brya/variants/kuldax/Makefile.inc b/src/mainboard/google/brya/variants/kuldax/Makefile.inc index 77aca987c4..e31aaa1707 100644 --- a/src/mainboard/google/brya/variants/kuldax/Makefile.inc +++ b/src/mainboard/google/brya/variants/kuldax/Makefile.inc @@ -4,5 +4,6 @@ bootblock-y += gpio.c romstage-y += gpio.c ramstage-y += gpio.c +ramstage-y += ramstage.c ramstage-$(CONFIG_FW_CONFIG) += fw_config.c ramstage-$(CONFIG_FW_CONFIG) += variant.c diff --git a/src/mainboard/google/brya/variants/kuldax/ramstage.c b/src/mainboard/google/brya/variants/kuldax/ramstage.c new file mode 100644 index 0000000000..14a365a407 --- /dev/null +++ b/src/mainboard/google/brya/variants/kuldax/ramstage.c @@ -0,0 +1,60 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ + +#include <baseboard/variants.h> +#include <chip.h> +#include <device/device.h> +#include <device/pci_ids.h> +#include <device/pci_ops.h> +#include <ec/google/chromeec/ec.h> +#include <intelblocks/power_limit.h> + +const struct cpu_power_limits limits[] = { + /* SKU_ID, TDP (Watts), pl1_min, pl1_max, pl2_min, pl2_max, pl4 */ + { PCI_DID_INTEL_ADL_P_ID_10, 15, 15000, 15000, 55000, 55000, 123000 }, + { PCI_DID_INTEL_ADL_P_ID_7, 15, 15000, 15000, 55000, 55000, 123000 }, + { PCI_DID_INTEL_ADL_P_ID_6, 15, 15000, 15000, 55000, 55000, 123000 }, + { PCI_DID_INTEL_ADL_P_ID_5, 28, 28000, 28000, 64000, 64000, 140000 }, + { PCI_DID_INTEL_ADL_P_ID_3, 28, 28000, 28000, 64000, 64000, 140000 }, +}; + +const struct system_power_limits sys_limits[] = { + /* SKU_ID, TDP (Watts), psys_pl2 (Watts) */ + { PCI_DID_INTEL_ADL_P_ID_10, 15, 65 }, + { PCI_DID_INTEL_ADL_P_ID_7, 15, 150 }, + { PCI_DID_INTEL_ADL_P_ID_6, 15, 150 }, + { PCI_DID_INTEL_ADL_P_ID_5, 28, 150 }, + { PCI_DID_INTEL_ADL_P_ID_3, 28, 150 }, +}; + +/* + * Psys_pmax considerations. + * + * Given the hardware design in kuldax, the serial shunt resistor is 0.005ohm. + * The full scale of hardware PSYS signal 1.6v maps to system current 7.5A + * instead of real system power. The equation is shown below: + * PSYS = 1.6v = (0.01ohm x 7.5A) x 50 (INA213, gain 50V/V) x R501/(R501 + R510) + * R501/(R501 + R510) = 0.858 = 20K / (20K + 3.3K) + * + * The Psys_pmax is a SW setting which tells IMVP9.1 the mapping b/w system input + * current and the actual system power. Since there is no voltage information + * from PSYS, different voltage input would map to different Psys_pmax settings: + * For Type-C 15V, the Psys_pmax should be 15v x 7.5A = 112.5W + * For Type-C 20V, the Psys_pmax should be 20v x 7.5A = 150W + * For a barrel jack, the Psys_pmax should be 20v x 7.5A = 150W + * + * Imagine that there is a type-c 100W (20V/5A) connected to DUT w/ full loading, + * and the Psys_pmax setting is 150W. Then IMVP9.1 can calculate the current system + * power = 150W * 5A / 7.5A = 100W, which is the actual system power. + */ +const struct psys_config psys_config = { + .efficiency = 97, + .psys_imax_ma = 7500, + .bj_volts_mv = 20000 +}; + +void variant_devtree_update(void) +{ + size_t total_entries = ARRAY_SIZE(limits); + variant_update_psys_power_limits(limits, sys_limits, total_entries, &psys_config); + variant_update_power_limits(limits, total_entries); +} |