On 06/03/2013 07:59 AM, Heiko Stübner wrote:
> Cortex-A9 SoCs from Rockchip use a slightly modified variant of dw_mmc
> controllers that seems to require the SDMMC_CMD_USE_HOLD_REG bit to
> always be set.
>
> There also seem to be no other modifications (additional register etc)
> present, so to keep the footprint low, add this small variant to the
> pltfm driver.
>
> Signed-off-by: Heiko Stuebner <he...@sntech.de>
> ---
> drivers/mmc/host/dw_mmc-pltfm.c | 48 +++++++++++++++++++++++++++-----------
> 1 files changed, 34 insertions(+), 14 deletions(-)
>
> diff --git a/drivers/mmc/host/dw_mmc-pltfm.c b/drivers/mmc/host/dw_mmc-pltfm.c
> index 0048da8..7d041b5 100644
> --- a/drivers/mmc/host/dw_mmc-pltfm.c
> +++ b/drivers/mmc/host/dw_mmc-pltfm.c
> @@ -24,6 +24,16 @@
>
> #include "dw_mmc.h"
>
> +
> +static void dw_mci_rockchip_prepare_command(struct dw_mci *host, u32 *cmdr)
How about using "dw_mci_pltfm_prepare_command()"?
Maybe HOLD_REG could be used at other SoC.
> +{
> + *cmdr |= SDMMC_CMD_USE_HOLD_REG;
> +}
> +
> +static const struct dw_mci_drv_data rockchip_drv_data = {
> + .prepare_command = dw_mci_rockchip_prepare_command,
> +};
> +
> int dw_mci_pltfm_register(struct platform_device *pdev,
> const struct dw_mci_drv_data *drv_data)
> {
> @@ -63,20 +73,6 @@ int dw_mci_pltfm_register(struct platform_device *pdev,
> }
> EXPORT_SYMBOL_GPL(dw_mci_pltfm_register);
>
> -static int dw_mci_pltfm_probe(struct platform_device *pdev)
> -{
> - return dw_mci_pltfm_register(pdev, NULL);
> -}
> -
> -int dw_mci_pltfm_remove(struct platform_device *pdev)
> -{
> - struct dw_mci *host = platform_get_drvdata(pdev);
> -
> - dw_mci_remove(host);
> - return 0;
> -}
> -EXPORT_SYMBOL_GPL(dw_mci_pltfm_remove);
> -
> #ifdef CONFIG_PM_SLEEP
> /*
> * TODO: we should probably disable the clock to the card in the suspend
> path.
> @@ -114,10 +110,34 @@ EXPORT_SYMBOL_GPL(dw_mci_pltfm_pmops);
>
> static const struct of_device_id dw_mci_pltfm_match[] = {
> { .compatible = "snps,dw-mshc", },
> + { .compatible = "rockchip,cortex-a9-dw-mshc",
> + .data = &rockchip_drv_data },
> {},
> };
> MODULE_DEVICE_TABLE(of, dw_mci_pltfm_match);
>
> +static int dw_mci_pltfm_probe(struct platform_device *pdev)
> +{
> + const struct dw_mci_drv_data *drv_data = NULL;
> + const struct of_device_id *match;
> +
> + if (pdev->dev.of_node) {
> + match = of_match_node(dw_mci_pltfm_match, pdev->dev.of_node);
> + drv_data = match->data;
> + }
> +
> + return dw_mci_pltfm_register(pdev, drv_data);
> +}
> +
> +int dw_mci_pltfm_remove(struct platform_device *pdev)
> +{
> + struct dw_mci *host = platform_get_drvdata(pdev);
> +
> + dw_mci_remove(host);
> + return 0;
> +}
> +EXPORT_SYMBOL_GPL(dw_mci_pltfm_remove);
> +
> static struct platform_driver dw_mci_pltfm_driver = {
> .probe = dw_mci_pltfm_probe,
> .remove = dw_mci_pltfm_remove,
>
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