[PATCH 0/4] mtd: spi-nor: add a new framework for SPI NOR

[Angus Clark]

On 12/04/2013 02:46 AM, Huang Shijie wrote:
> 于 2013年11月29日 22:52, Angus Clark 写道:
>>     int (*write_reg)(struct spi_nor_info *info,
>>              uint8_t cmd, uint8_t *reg, int len,
>>              int wren, int wtr);
> I guess you add the 'wren' for the issuing write-enable before issuing
> the 'cmd'.
> 
> but what's 'wtr' for? i do not know what's the meaning of the 'wtr'.
> 

'wtr' is for "Wait 'til Ready".  Some register writes are instant, while others
require polling of the "Write In Progress" bit.

Cheers,

Angus