diff options
| -rw-r--r-- | src/mainboard/siemens/mc_ehl/variants/mc_ehl2/mainboard.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/src/mainboard/siemens/mc_ehl/variants/mc_ehl2/mainboard.c b/src/mainboard/siemens/mc_ehl/variants/mc_ehl2/mainboard.c index a798398254..339516057a 100644 --- a/src/mainboard/siemens/mc_ehl/variants/mc_ehl2/mainboard.c +++ b/src/mainboard/siemens/mc_ehl/variants/mc_ehl2/mainboard.c @@ -9,6 +9,8 @@ #include <soc/pci_devs.h> #include <soc/pcr_ids.h> +#define HOSTCTRL2 0x3E +#define HOSTCTRL2_PRESET (1 << 15) #define SD_CAP_BYP 0x810 #define SD_CAP_BYP_EN 0x5A #define SD_CAP_BYP_REG1 0x814 @@ -34,6 +36,7 @@ void variant_mainboard_final(void) dev = pcidev_path_on_root(PCH_DEVFN_SDCARD); if (dev) { uint32_t reg; + uint16_t reg16; struct resource *res = probe_resource(dev, PCI_BASE_ADDRESS_0); if (!res) return; @@ -43,6 +46,11 @@ void variant_mainboard_final(void) reg &= ~(SD_CAP_BYP_SDR104 | SD_CAP_BYP_SDR50); reg |= SD_CAP_BYP_DDR50; write32(res2mmio(res, SD_CAP_BYP_REG1, 0), reg); + + /* Use preset driver strength from preset value registers. */ + reg16 = read16(res2mmio(res, HOSTCTRL2, 0)); + reg16 |= HOSTCTRL2_PRESET; + write16(res2mmio(res, HOSTCTRL2, 0), reg16); } } |