Re: [PATCHv2 1/3] mmc: host: add slot argument to mmc_of_parse

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On 26 May 2014 13:35, Jaehoon Chung <jh80.chung@xxxxxxxxxxx> wrote:
> From: Ludovic Desroches <ludovic.desroches@xxxxxxxxx>
>
> Some hosts manage several slots. In these case information such as the
> bus width, chip detect and others are into the slot node. So we have to
> parse child node. If not NULL, slot node will be used instead of the
> device node.
>
> Signed-off-by: Ludovic Desroches <ludovic.desroches@xxxxxxxxx>
> Signed-off-by: Jaehoon Chung <jh80.chung@xxxxxxxxxxx>

Thanks Jaehoon/Ludovic,

Signed-off-by: Ulf Hansson <ulf.hansson@xxxxxxxxxx>

> ---
> Changelog V2:
>         - Fix the typo.
>
>  drivers/mmc/core/host.c  |   13 +++++++++----
>  include/linux/mmc/host.h |   10 +++++++++-
>  2 files changed, 18 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/mmc/core/host.c b/drivers/mmc/core/host.c
> index 95cceae..0f677b3 100644
> --- a/drivers/mmc/core/host.c
> +++ b/drivers/mmc/core/host.c
> @@ -298,15 +298,17 @@ static inline void mmc_host_clk_sysfs_init(struct mmc_host *host)
>  #endif
>
>  /**
> - *     mmc_of_parse() - parse host's device-tree node
> + *     __mmc_of_parse() - parse host's device-tree node
>   *     @host: host whose node should be parsed.
> + *     @slot : some device provide several slots so the node to parse
> + *             is not the host one.
>   *
>   * To keep the rest of the MMC subsystem unaware of whether DT has been
>   * used to to instantiate and configure this host instance or not, we
>   * parse the properties and set respective generic mmc-host flags and
>   * parameters.
>   */
> -int mmc_of_parse(struct mmc_host *host)
> +int __mmc_of_parse(struct mmc_host *host, struct device_node *slot)
>  {
>         struct device_node *np;
>         u32 bus_width;
> @@ -317,7 +319,10 @@ int mmc_of_parse(struct mmc_host *host)
>         if (!host->parent || !host->parent->of_node)
>                 return 0;
>
> -       np = host->parent->of_node;
> +       if (slot)
> +               np = slot;
> +       else
> +               np = host->parent->of_node;
>
>         /* "bus-width" is translated to MMC_CAP_*_BIT_DATA flags */
>         if (of_property_read_u32(np, "bus-width", &bus_width) < 0) {
> @@ -459,7 +464,7 @@ out:
>         return ret;
>  }
>
> -EXPORT_SYMBOL(mmc_of_parse);
> +EXPORT_SYMBOL(__mmc_of_parse);
>
>  /**
>   *     mmc_alloc_host - initialise the per-host structure.
> diff --git a/include/linux/mmc/host.h b/include/linux/mmc/host.h
> index 7960424..c62af91 100644
> --- a/include/linux/mmc/host.h
> +++ b/include/linux/mmc/host.h
> @@ -372,7 +372,15 @@ struct mmc_host *mmc_alloc_host(int extra, struct device *);
>  int mmc_add_host(struct mmc_host *);
>  void mmc_remove_host(struct mmc_host *);
>  void mmc_free_host(struct mmc_host *);
> -int mmc_of_parse(struct mmc_host *host);
> +int __mmc_of_parse(struct mmc_host *host, struct device_node *slot);
> +/*
> + * mmc_of_parse - parse host's device-tree node
> + *     @host: host whose node should be parsed.
> + */
> +static inline int mmc_of_parse(struct mmc_host *host)
> +{
> +       return __mmc_of_parse(host, NULL);
> +}
>
>  static inline void *mmc_priv(struct mmc_host *host)
>  {
> --
> 1.7.9.5
>
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