[OpenWrt-Devel] [PATCH][RFC][bcm53xx] mtd: nand: bcm_nand: switch from cmdlinepart to ofpart

[Rafał Miłecki]

On 7 December 2014 at 16:08, Hauke Mehrtens <hauke at hauke-m.de> wrote:
> On 12/07/2014 01:18 AM, Rafał Miłecki wrote:
>> bcm_nand uses (and depends on) OF, so there isn't much sense to use
>> cmdlinepart
>>
>> Signed-off-by: Rafał Miłecki <zajec5 at gmail.com>
>> ---
>>  drivers/mtd/nand/bcm_nand.c | 7 +++++--
>>  1 file changed, 5 insertions(+), 2 deletions(-)
>>
>> diff --git a/drivers/mtd/nand/bcm_nand.c b/drivers/mtd/nand/bcm_nand.c
>> index 3c5b1d1..f2bd79e 100644
>> --- a/drivers/mtd/nand/bcm_nand.c
>> +++ b/drivers/mtd/nand/bcm_nand.c
>> @@ -40,6 +40,7 @@
>>
>>  #include <linux/mtd/mtd.h>
>>  #include <linux/mtd/nand.h>
>> +#include <linux/mtd/partitions.h>
>>
>>  #define NANDC_MAX_CHIPS              2       /* Only 2 CSn supported in NorthStar */
>>
>> @@ -1494,13 +1495,14 @@ static int __init bcmnand_idm_init(struct bcmnand_ctrl *ctrl)
>>       return 0;
>>  }
>>
>> -static const char * const part_probes[] = { "bcm47xxpart", "cmdlinepart", NULL };
>> +static const char * const part_probes[] = { "bcm47xxpart", "ofpart", NULL };
>
> This makes sense. Shouldn't ofpart be the first thing we probe for? This
> way we can provide a partition map through device tree and overwrite the
> auto probed one.

You're right, I'll change the order.


>>  /*
>>   * Top-level init function
>>   */
>>  static int bcmnand_probe(struct bcma_device *core)
>>  {
>> +     struct mtd_part_parser_data parser_data;
>>       struct device *dev = &core->dev;
>>       struct device_node *np = dev->of_node;
>>       struct bcmnand_ctrl *ctrl;
>> @@ -1539,7 +1541,8 @@ static int bcmnand_probe(struct bcma_device *core)
>>       if (res)
>>               return res;
>>
>> -     res = mtd_device_parse_register(&ctrl->mtd, part_probes, NULL, NULL, 0);
>> +     parser_data.of_node = np;
>> +     res = mtd_device_parse_register(&ctrl->mtd, part_probes, &parser_data, NULL, 0);
>
> Is this needed for ofpart?

Yes, see drivers/mtd/ofpart.c. There is
struct mtd_part_parser_data *data
and the code calls
node = data->of_node;

-- 
Rafał
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