On 08/01/18 17:44, Ard Biesheuvel wrote:
> The Fujitsu SDH30 SDHCI controller may be described as a SCX0002 ACPI
> device on ACPI platforms incorporating the Socionext SynQuacer SoC.
>
> Given that mmc_of_parse() has already been made ACPI/DT agnostic,
> making the SDH30 driver ACPI capable is actually rather simple:
> all we need to do is make the call to sdhci_get_of_property() [which
> does not set any properties we care about] and the clock handling
> dependent on whether we are dealing with a DT device, and exposing
> the ACPI id via the platform_driver struct and the module metadata.
>
> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@xxxxxxxxxx>
Acked-by: Adrian Hunter <adrian.hunter@xxxxxxxxx>
> ---
> v2: make OF optional now that ACPI is supported
> drop dev_of_node() check when disabling the clocks - those routines
> tolerate NULL pointers so there's no need
>
> drivers/mmc/host/Kconfig | 2 +-
> drivers/mmc/host/sdhci_f_sdh30.c | 52 +++++++++++++-------
> 2 files changed, 35 insertions(+), 19 deletions(-)
>
> diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig
> index 567028c9219a..07ed947ed10b 100644
> --- a/drivers/mmc/host/Kconfig
> +++ b/drivers/mmc/host/Kconfig
> @@ -320,7 +320,7 @@ config MMC_SDHCI_BCM_KONA
> config MMC_SDHCI_F_SDH30
> tristate "SDHCI support for Fujitsu Semiconductor F_SDH30"
> depends on MMC_SDHCI_PLTFM
> - depends on OF
> + depends on OF || ACPI
> help
> This selects the Secure Digital Host Controller Interface (SDHCI)
> Needed by some Fujitsu SoC for MMC / SD / SDIO support.
> diff --git a/drivers/mmc/host/sdhci_f_sdh30.c b/drivers/mmc/host/sdhci_f_sdh30.c
> index 04ca0d33a521..485f7591fae4 100644
> --- a/drivers/mmc/host/sdhci_f_sdh30.c
> +++ b/drivers/mmc/host/sdhci_f_sdh30.c
> @@ -10,9 +10,11 @@
> * the Free Software Foundation, version 2 of the License.
> */
>
> +#include <linux/acpi.h>
> #include <linux/err.h>
> #include <linux/delay.h>
> #include <linux/module.h>
> +#include <linux/of.h>
> #include <linux/property.h>
> #include <linux/clk.h>
>
> @@ -146,7 +148,6 @@ static int sdhci_f_sdh30_probe(struct platform_device *pdev)
>
> platform_set_drvdata(pdev, host);
>
> - sdhci_get_of_property(pdev);
> host->hw_name = "f_sdh30";
> host->ops = &sdhci_f_sdh30_ops;
> host->irq = irq;
> @@ -158,25 +159,29 @@ static int sdhci_f_sdh30_probe(struct platform_device *pdev)
> goto err;
> }
>
> - priv->clk_iface = devm_clk_get(&pdev->dev, "iface");
> - if (IS_ERR(priv->clk_iface)) {
> - ret = PTR_ERR(priv->clk_iface);
> - goto err;
> - }
> + if (dev_of_node(dev)) {
> + sdhci_get_of_property(pdev);
>
> - ret = clk_prepare_enable(priv->clk_iface);
> - if (ret)
> - goto err;
> + priv->clk_iface = devm_clk_get(&pdev->dev, "iface");
> + if (IS_ERR(priv->clk_iface)) {
> + ret = PTR_ERR(priv->clk_iface);
> + goto err;
> + }
>
> - priv->clk = devm_clk_get(&pdev->dev, "core");
> - if (IS_ERR(priv->clk)) {
> - ret = PTR_ERR(priv->clk);
> - goto err_clk;
> - }
> + ret = clk_prepare_enable(priv->clk_iface);
> + if (ret)
> + goto err;
>
> - ret = clk_prepare_enable(priv->clk);
> - if (ret)
> - goto err_clk;
> + priv->clk = devm_clk_get(&pdev->dev, "core");
> + if (IS_ERR(priv->clk)) {
> + ret = PTR_ERR(priv->clk);
> + goto err_clk;
> + }
> +
> + ret = clk_prepare_enable(priv->clk);
> + if (ret)
> + goto err_clk;
> + }
>
> /* init vendor specific regs */
> ctrl = sdhci_readw(host, F_SDH30_AHB_CONFIG);
> @@ -226,16 +231,27 @@ static int sdhci_f_sdh30_remove(struct platform_device *pdev)
> return 0;
> }
>
> +#ifdef CONFIG_OF
> static const struct of_device_id f_sdh30_dt_ids[] = {
> { .compatible = "fujitsu,mb86s70-sdhci-3.0" },
> { /* sentinel */ }
> };
> MODULE_DEVICE_TABLE(of, f_sdh30_dt_ids);
> +#endif
> +
> +#ifdef CONFIG_ACPI
> +static const struct acpi_device_id f_sdh30_acpi_ids[] = {
> + { "SCX0002" },
> + { /* sentinel */ }
> +};
> +MODULE_DEVICE_TABLE(acpi, f_sdh30_acpi_ids);
> +#endif
>
> static struct platform_driver sdhci_f_sdh30_driver = {
> .driver = {
> .name = "f_sdh30",
> - .of_match_table = f_sdh30_dt_ids,
> + .of_match_table = of_match_ptr(f_sdh30_dt_ids),
> + .acpi_match_table = ACPI_PTR(f_sdh30_acpi_ids),
> .pm = &sdhci_pltfm_pmops,
> },
> .probe = sdhci_f_sdh30_probe,
>
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