On 09:34 Sun 14 Apr , Christophe JAILLET wrote:
> Le 14/04/2024 à 00:14, Andrea della Porta a écrit :
> > Broadcom BCM2712 SDHCI controller is SD Express capable. Add support
> > for sde capability where the implementation is based on downstream driver,
> > diverging from it in the way that init_sd_express callback is invoked:
> > in downstream the sdhci_ops structure has been augmented with a new
> > function ptr 'init_sd_express' that just propagate the call to the
> > driver specific callback so that the callstack from a structure
> > standpoint is mmc_host_ops -> sdhci_ops. The drawback here is in the
> > added level of indirection (the newly added init_sd_express is
> > redundant) and the sdhci_ops structure declaration has to be changed.
> > To overcome this the presented approach consist in patching the mmc_host_ops
> > init_sd_express callback to point directly to the custom function defined in
> > this driver (see struct brcmstb_match_priv).
> >
> > Signed-off-by: Andrea della Porta <andrea.porta-IBi9RG/b67k@xxxxxxxxxxxxxxxx>
> > ---
> > drivers/mmc/host/Kconfig | 1 +
> > drivers/mmc/host/sdhci-brcmstb.c | 147 ++++++++++++++++++++++++++++++-
> > 2 files changed, 147 insertions(+), 1 deletion(-)
>
> ...
>
> > + if (brcmstb_priv->sde_pcie) {
> > + struct of_changeset changeset;
> > + static struct property okay_property = {
> > + .name = "status",
> > + .value = "okay",
> > + .length = 5,
> > + };
> > +
> > + /* Enable the pcie controller */
> > + of_changeset_init(&changeset);
> > + ret = of_changeset_update_property(&changeset,
> > + brcmstb_priv->sde_pcie,
> > + &okay_property);
> > + if (ret) {
> > + dev_err(dev, "%s: failed to update property - %d\n", __func__,
> > + ret);
> > + return -ENODEV;
> > + }
> > + ret = of_changeset_apply(&changeset);
> > + }
> > +
> > + dev_dbg(dev, "%s -> %d\n", __func__, ret);
>
> Is this really useful?
Not really. Removed.
>
> > + return ret;
> > +}
> > +
>
> ...
>
> > @@ -468,6 +581,24 @@ static int sdhci_brcmstb_probe(struct platform_device *pdev)
> > if (res)
> > goto err;
> > + priv->sde_1v8 = devm_regulator_get_optional(&pdev->dev, "sde-1v8");
> > + if (IS_ERR(priv->sde_1v8))
> > + priv->flags &= ~BRCMSTB_PRIV_FLAGS_HAS_SD_EXPRESS;
> > +
> > + iomem = platform_get_resource(pdev, IORESOURCE_MEM, 2);
> > + if (iomem) {
> > + priv->sde_ioaddr = devm_ioremap_resource(&pdev->dev, iomem);
> > + if (IS_ERR(priv->sde_ioaddr))
> > + priv->sde_ioaddr = NULL;
> > + }
> > +
> > + iomem = platform_get_resource(pdev, IORESOURCE_MEM, 3);
> > + if (iomem) {
> > + priv->sde_ioaddr2 = devm_ioremap_resource(&pdev->dev, iomem);
> > + if (IS_ERR(priv->sde_ioaddr2))
> > + priv->sde_ioaddr = NULL;
>
> sde_ioaddr2 ?
>
> > + }
> > +
> > priv->pinctrl = devm_pinctrl_get(&pdev->dev);
> > if (IS_ERR(priv->pinctrl)) {
> > no_pinctrl = true;
> > @@ -478,8 +609,16 @@ static int sdhci_brcmstb_probe(struct platform_device *pdev)
> > no_pinctrl = true;
> > }
> > - if (no_pinctrl )
> > + priv->pins_sdex = pinctrl_lookup_state(priv->pinctrl, "sd-express");
> > + if (IS_ERR(priv->pins_sdex)) {
> > + dev_dbg(&pdev->dev, "No pinctrl sd-express state\n");
> > + no_pinctrl = true;
>
> Indentation looks too large.
Ack.
>
> > + }
> > +
> > + if (no_pinctrl || !priv->sde_ioaddr || !priv->sde_ioaddr2) {
> > priv->pinctrl = NULL;
> > + priv->flags &= ~BRCMSTB_PRIV_FLAGS_HAS_SD_EXPRESS;
> > + }
> > /*
> > * Automatic clock gating does not work for SD cards that may
>
> ...
>
In general I'll drop SD express patch for now, it will be re-introduced in a future patch.
Best regards,
Andrea
