Re: [PATCH 4/4] MMC: omap_hsmmc: add DT property for max bus frequency

Rob Herring
2012-10-12T15:25:42Z

On 10/12/2012 05:58 AM, Daniel Mack wrote:
> Maximum bus frequency can be limited by external circuitry like level
> shifters etc. Allow passing this value from DT.
>
> Signed-off-by: Daniel Mack <zonque@gmail.com>
> Cc: Venkatraman S <svenkatr@ti.com>
> Cc: Chris Ball <cjb@laptop.org>
> Cc: Grant Likely <grant.likely@secretlab.ca>
> Cc: Rob Herring <rob.herring@calxeda.com>
> Cc: linux-omap@vger.kernel.org
> ---
> drivers/mmc/host/omap_hsmmc.c | 5 ++++-
> 1 file changed, 4 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c
> index 86f0759..4650ef7 100644
> --- a/drivers/mmc/host/omap_hsmmc.c
> +++ b/drivers/mmc/host/omap_hsmmc.c
> @@ -1676,7 +1676,7 @@ static struct omap_mmc_platform_data *of_get_hsmmc_pdata(struct device *dev)
> {
> struct omap_mmc_platform_data *pdata;
> struct device_node *np = dev->of_node;
> - u32 bus_width;
> + u32 bus_width, max_freq;
>
> pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
> if (!pdata)
> @@ -1703,6 +1703,9 @@ static struct omap_mmc_platform_data *of_get_hsmmc_pdata(struct device *dev)
> if (of_find_property(np, "ti,needs-special-reset", NULL))
> pdata->slots[0].features |= HSMMC_HAS_UPDATED_RESET;
>
> + if (!of_property_read_u32(np, "max-frequency", &max_freq))
> + pdata->max_freq = max_freq;
> +

Is this property documented?

Rob

> return pdata;
> }
> #else
>