[PATCH] mmc: host: atmel-mci: Add support for non-removable slots

[Ludovic Desroches]

On Mon, Nov 03, 2014 at 01:12:59PM +0200, Timo Kokkonen wrote:
> Add support for non-removable slots which have no card detection GPIO
> and which should not be polled for a card change.
> 
> Signed-off-by: Timo Kokkonen <timo.kokkonen at offcode.fi>
Acked-by: Ludovic Desroches <ludovic.desroches at atmel.com>

Thanks

> ---
>  drivers/mmc/host/atmel-mci.c | 11 +++++++++--
>  include/linux/atmel-mci.h    |  2 ++
>  2 files changed, 11 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/mmc/host/atmel-mci.c b/drivers/mmc/host/atmel-mci.c
> index 77250d4..4de1a31 100644
> --- a/drivers/mmc/host/atmel-mci.c
> +++ b/drivers/mmc/host/atmel-mci.c
> @@ -560,6 +560,9 @@ atmci_of_init(struct platform_device *pdev)
>  		pdata->slot[slot_id].detect_is_active_high =
>  			of_property_read_bool(cnp, "cd-inverted");
>  
> +		pdata->slot[slot_id].non_removable =
> +			of_property_read_bool(cnp, "non-removable");
> +
>  		pdata->slot[slot_id].wp_pin =
>  			of_get_named_gpio(cnp, "wp-gpios", 0);
>  	}
> @@ -2206,8 +2209,12 @@ static int __init atmci_init_slot(struct atmel_mci *host,
>  		}
>  	}
>  
> -	if (!gpio_is_valid(slot->detect_pin))
> -		mmc->caps |= MMC_CAP_NEEDS_POLL;
> +	if (!gpio_is_valid(slot->detect_pin)) {
> +		if (slot_data->non_removable)
> +			mmc->caps |= MMC_CAP_NONREMOVABLE;
> +		else
> +			mmc->caps |= MMC_CAP_NEEDS_POLL;
> +	}
>  
>  	if (gpio_is_valid(slot->wp_pin)) {
>  		if (devm_gpio_request(&host->pdev->dev, slot->wp_pin,
> diff --git a/include/linux/atmel-mci.h b/include/linux/atmel-mci.h
> index 91b77f8..9177947 100644
> --- a/include/linux/atmel-mci.h
> +++ b/include/linux/atmel-mci.h
> @@ -11,6 +11,7 @@
>   * @detect_pin: GPIO pin wired to the card detect switch
>   * @wp_pin: GPIO pin wired to the write protect sensor
>   * @detect_is_active_high: The state of the detect pin when it is active
> + * @non_removable: The slot is not removable, only detect once
>   *
>   * If a given slot is not present on the board, @bus_width should be
>   * set to 0. The other fields are ignored in this case.
> @@ -26,6 +27,7 @@ struct mci_slot_pdata {
>  	int			detect_pin;
>  	int			wp_pin;
>  	bool			detect_is_active_high;
> +	bool			non_removable;
>  };
>  
>  /**
> -- 
> 1.9.1
>