diff options
Diffstat (limited to 'src/drivers')
| -rw-r--r-- | src/drivers/generic/bayhub/bh720.c | 13 | ||||
| -rw-r--r-- | src/drivers/generic/bayhub/chip.h | 3 |
2 files changed, 16 insertions, 0 deletions
diff --git a/src/drivers/generic/bayhub/bh720.c b/src/drivers/generic/bayhub/bh720.c index cdac9fe35a..24386642eb 100644 --- a/src/drivers/generic/bayhub/bh720.c +++ b/src/drivers/generic/bayhub/bh720.c @@ -44,6 +44,19 @@ static void bh720_init(struct device *dev) } board_bh720(dev); + + if (config && config->vih_tuning_value) { + /* Tune VIH */ + u32 bh720_pcr_data; + pci_write_config32(dev, BH720_PROTECT, + BH720_PROTECT_OFF | BH720_PROTECT_LOCK_OFF); + bh720_pcr_data = pci_read_config32(dev, BH720_PCR_DrvStrength_PLL); + bh720_pcr_data &= 0xFFFFFF00; + bh720_pcr_data |= config->vih_tuning_value; + pci_write_config32(dev, BH720_PCR_DrvStrength_PLL, bh720_pcr_data); + pci_write_config32(dev, BH720_PROTECT, + BH720_PROTECT_ON | BH720_PROTECT_LOCK_ON); + } } static struct device_operations bh720_ops = { diff --git a/src/drivers/generic/bayhub/chip.h b/src/drivers/generic/bayhub/chip.h index dacad7cb84..f898378cb4 100644 --- a/src/drivers/generic/bayhub/chip.h +++ b/src/drivers/generic/bayhub/chip.h @@ -8,4 +8,7 @@ struct drivers_generic_bayhub_config { /* 1 to enable power-saving mode, 0 to disable */ int power_saving; + + /* CLK and DAT tuning values */ + uint8_t vih_tuning_value; }; |