[U-Boot] [UBOOT][PATCH 5/5] am43xx: add delay before xfer

[Sourav Poddar <sourav.poddar@ti.com>]

On Thursday 19 December 2013 12:17 AM, Jagan Teki wrote:
> On Thu, Nov 14, 2013 at 9:09 PM, Sourav Poddar<sourav.poddar@ti.com>  wrote:
>> Without this delay, write/read is failing.
>> Looks like, the WIP always remain set and hence a timeout
>> occurs leading to the error.
>>
>> Signed-off-by: Sourav Poddar<sourav.poddar@ti.com>
>> ---
>> Hi Jagan,
>> This patch seems to be necessary for read/write.
>> I tested by changing few timing variables, but it did not help.
>> The same driver works on J6 with a differnet flash(S25FL256S).
>> Is any one tested macronix flash at uboot?
> Delay must be for macronix?
> or common for all flashes.
>
For macronix.
> I haven't tested macronix
>
>>   drivers/spi/ti_qspi.c |    3 +++
>>   1 files changed, 3 insertions(+), 0 deletions(-)
>>
>> diff --git a/drivers/spi/ti_qspi.c b/drivers/spi/ti_qspi.c
>> index 5666250..aa7b6ae 100644
>> --- a/drivers/spi/ti_qspi.c
>> +++ b/drivers/spi/ti_qspi.c
>> @@ -285,6 +285,9 @@ int spi_xfer(struct spi_slave *slave, unsigned int bitlen, const void *dout,
>>                  qslave->cmd |= QSPI_3_PIN;
>>          qslave->cmd |= 0xfff;
>>
>> +#ifdef CONFIG_AM43XX
>> +       udelay(100);
>> +#endif
>>          while (words--) {
>>                  if (txp) {
>>                          debug("tx cmd %08x dc %08x data %02x\n",
>> --
>> 1.7.1
>>
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>
>