Hi Judith,
> -----Original Message-----
> From: Judith Mendez <[email protected]>
> Sent: Tuesday, April 16, 2024 6:28 AM
> To: Peng Fan <[email protected]>; Jaehoon Chung <[email protected]>; Tom
> Rini <[email protected]>
> Cc: Nitin Yadav <[email protected]>; Simon Glass <[email protected]>;
> [email protected]
> Subject: [PATCH 2/5] mmc: am654_sdhci: Fix OTAP/ITAP delay values
>
> From: Nitin Yadav <[email protected]>
>
> U-Boot is failing to boot class U1 UHS SD cards due to incorrect
> OTAP and ITAP delay select values. Update OTAP and ITAP delay select
> values from DT.
>
> Fixes: c7d106b4eb3 ("mmc: am654_sdhci: Update output tap delay writes")
> Signed-off-by: Nitin Yadav <[email protected]>
> Signed-off-by: Judith Mendez <[email protected]>
> ---
> drivers/mmc/am654_sdhci.c | 23 +++++++++++++++++++----
> 1 file changed, 19 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/mmc/am654_sdhci.c b/drivers/mmc/am654_sdhci.c
> index e5ad00e2531..1dd032e1e36 100644
> --- a/drivers/mmc/am654_sdhci.c
> +++ b/drivers/mmc/am654_sdhci.c
> @@ -513,12 +513,27 @@ static int j721e_4bit_sdhci_set_ios_post(struct
> sdhci_host *host)
> {
> struct udevice *dev = host->mmc->dev;
> struct am654_sdhci_plat *plat = dev_get_plat(dev);
> - u32 otap_del_sel, mask, val;
> + int mode = host->mmc->selected_mode;
> + u32 otap_del_sel;
> + u32 itap_del_sel;
> + u32 mask, val;
> +
> + otap_del_sel = plat->otap_del_sel[mode];
>
> - otap_del_sel = plat->otap_del_sel[host->mmc->selected_mode];
> mask = OTAPDLYENA_MASK | OTAPDLYSEL_MASK;
> - val = (1 << OTAPDLYENA_SHIFT) | (otap_del_sel << OTAPDLYSEL_SHIFT);
> + val = (1 << OTAPDLYENA_SHIFT) |
> + (otap_del_sel << OTAPDLYSEL_SHIFT);
Is there any reason to touch this? And I can't understood this, this val
doesn’t use anywhere.
Because val is resetting the below. It seems same value, right?
> +
> + itap_del_sel = plat->itap_del_sel[mode];
> +
> + mask |= ITAPDLYENA_MASK | ITAPDLYSEL_MASK;
Can it be set at above?
mask |= OTAPDLYENA_MASK | OTAPDLYSEL_MASK |
ITAPDLYENA_MASK | ITAPDLYSEL_MASK;
Best Regards,
Jaehoon Chung
> + val = (1 << ITAPDLYENA_SHIFT) |
> + (itap_del_sel << ITAPDLYSEL_SHIFT);
> +
> + regmap_update_bits(plat->base, PHY_CTRL4, ITAPCHGWIN_MASK,
> + 1 << ITAPCHGWIN_SHIFT);
> regmap_update_bits(plat->base, PHY_CTRL4, mask, val);
> + regmap_update_bits(plat->base, PHY_CTRL4, ITAPCHGWIN_MASK, 0);
>
> regmap_update_bits(plat->base, PHY_CTRL5, CLKBUFSEL_MASK,
> plat->clkbuf_sel);
> @@ -572,7 +587,7 @@ static int sdhci_am654_get_otap_delay(struct udevice *dev,
> * Remove the corresponding capability if an otap-del-sel
> * value is not found
> */
> - for (i = MMC_HS; i <= MMC_HS_400; i++) {
> + for (i = MMC_LEGACY; i <= MMC_HS_400; i++) {
> ret = dev_read_u32(dev, td[i].otap_binding,
> &plat->otap_del_sel[i]);
> if (ret) {
> --
> 2.43.2
