| /* 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 "dsm_calib.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; |
| } |