/* SPDX-License-Identifier: GPL-2.0-only */ #include <console/console.h> #include <drivers/vpd/vpd.h> #include <stdint.h> #include <string.h> #include <types.h> #include <vendorcode/google/chromeos/chromeos.h> #define DSM_BUF_LEN 128 #define DSM_PREFIX "dsm_calib_" enum cb_err get_dsm_calibration_from_key(const char *key, uint64_t *value) { static char buf[DSM_BUF_LEN]; char *ret; long value_from_vpd; if (strncmp(key, DSM_PREFIX, strlen(DSM_PREFIX))) { printk(BIOS_ERR, "got invalid dsm_calib key: %s\n", key); return CB_ERR; } ret = vpd_gets(key, buf, DSM_BUF_LEN, VPD_RO); if (!ret) { printk(BIOS_ERR, "failed to find key in VPD: %s\n", key); return CB_ERR; } value_from_vpd = atol(buf); if (value_from_vpd <= 0) { printk(BIOS_ERR, "got invalid dsm_calib from VPD: %ld\n", value_from_vpd); return CB_ERR; } *value = value_from_vpd; return CB_SUCCESS; }