Two more comments...

On Tue, Aug 07, 2018 at 04:59:58PM +0300, Aapo Vienamo wrote:
> Parse and program the HS400 DQS trim value from dt. Program a fallback
> value in case the property is missing.

"dt" -> "DT" because it is an abbreviation.

> 
> Signed-off-by: Aapo Vienamo <avienamo@nvidia.com>
> ---
>  drivers/mmc/host/sdhci-tegra.c | 32 +++++++++++++++++++++++++++++---
>  1 file changed, 29 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/mmc/host/sdhci-tegra.c b/drivers/mmc/host/sdhci-tegra.c
[...]
> @@ -545,20 +555,33 @@ static unsigned int tegra_sdhci_get_max_clock(struct sdhci_host *host)
>  	return clk_round_rate(pltfm_host->clk, UINT_MAX);
>  }
>  
> +static void tegra_sdhci_set_dqs_trim(struct sdhci_host *host, u8 val)
> +{
> +	u32 reg;
> +
> +	reg = sdhci_readl(host, SDHCI_TEGRA_VENDOR_CAP_OVERRIDES);
> +	reg &= ~SDHCI_TEGRA_CAP_OVERRIDES_DQS_TRIM_MASK;
> +	reg |= val<<SDHCI_TEGRA_CAP_OVERRIDES_DQS_TRIM_SHIFT;

Also, you should add spaces around '<<'.

Thierry