mainboard.c

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/* SPDX-License-Identifier: GPL-2.0-only */
 
#include <baseboard/variants.h>
#include <chip.h>
#include <device/device.h>
#include <device/pci_ids.h>
#include <device/pci_ops.h>
#include <intelblocks/power_limit.h>
 
/* PL2 limit in watts for AML and KBL */
#define PL2_AML 18
#define PL2_KBL 15
 
static uint32_t get_pl2(void)
{
        struct device *igd_dev = pcidev_path_on_root(SA_DEVFN_IGD);
        uint16_t id;
 
        id = pci_read_config16(igd_dev, PCI_DEVICE_ID);
        /* Assume we only have KLB-Y and AML-Y SKUs */
        if (id == PCI_DID_INTEL_KBL_GT2_SULXM)
                return PL2_KBL;
 
        return PL2_AML;
}
 
/* Override dev tree settings per board */
void variant_devtree_update(void)
{
        struct soc_power_limits_config *soc_conf;
        config_t *cfg = config_of_soc();
 
        soc_conf = &cfg->power_limits_config;
        /* Update PL2 based on CPU */
        soc_conf->tdp_pl2_override = get_pl2();
}