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

Daniel Mack
2012-10-12T15:26:43Z

On 12.10.2012 17:25, Rob Herring wrote:
> 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?

Yes, in the generic part. Forgot to mention that.

Documentation/devicetree/bindings/mmc/mmc.txt