[U-Boot] [U-Boot, v3, 1/3] mmc: dwmmc: socfpga: Add reset ctrl to driver

[Tom Rini]

On Tue, May 08, 2018 at 11:19:24AM +0800, Ley Foon Tan wrote:

> Add code to reset all reset signals as in mmc DT node. A reset property is an optional feature,
> so only print out a warning and do not fail if a reset property is not present.
> 
> If a reset property is discovered, then use it to deassert, thus bringing the
> IP out of reset.
> 
> Signed-off-by: Ley Foon Tan <ley.foon.tan at intel.com>
> Reviewed-by: Simon Glass <sjg at chromium.org>
> ---
>  drivers/mmc/socfpga_dw_mmc.c |   17 +++++++++++++++++
>  1 files changed, 17 insertions(+), 0 deletions(-)
> 
> diff --git a/drivers/mmc/socfpga_dw_mmc.c b/drivers/mmc/socfpga_dw_mmc.c
> index fa0e449..eb7e64e 100644
> --- a/drivers/mmc/socfpga_dw_mmc.c
> +++ b/drivers/mmc/socfpga_dw_mmc.c
> @@ -13,6 +13,7 @@
>  #include <linux/libfdt.h>
>  #include <linux/err.h>
>  #include <malloc.h>
> +#include <reset.h>
>  
>  DECLARE_GLOBAL_DATA_PTR;
>  
> @@ -33,6 +34,20 @@ struct dwmci_socfpga_priv_data {
>  	unsigned int		smplsel;
>  };
>  
> +static void socfpga_dwmci_reset(struct udevice *dev)
> +{
> +	struct reset_ctl_bulk reset_bulk;
> +	int ret;
> +
> +	ret = reset_get_bulk(dev, &reset_bulk);
> +	if (ret) {
> +		dev_warn(dev, "Can't get reset: %d\n", ret);
> +		return;
> +	}
> +
> +	reset_deassert_bulk(&reset_bulk);
> +}

The driver doesn't depend on DM_RESET and this code hunk doesn't either
so it fails to build on a number of platforms.  This type of comment
applies to the whole series, and may be fixed differently in different
cases (it might be OK to enforce DM_RESET for this driver, but not for
the ns16550 driver).

-- 
Tom
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