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2013/7/5 Johannes Stezenbach :
> On Fri, Jul 05, 2013 at 06:24:40PM +0800, yuhang wang wrote:
>>
>> 2 Questions here:
>> 1.In m25p80.c probe, the kmalloc below I feel very strange.
>> flash->command = kmalloc(MAX_CMD_SIZE + (flash->fast_read ? 1 : 0),
>>
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On Fri, Jul 05, 2013 at 06:24:40PM +0800, yuhang wang wrote:
>
> 2 Questions here:
> 1.In m25p80.c probe, the kmalloc below I feel very strange.
> flash->command = kmalloc(MAX_CMD_SIZE + (flash->fast_read ? 1 : 0),
> GFP_KERNEL);
>
> (flash->fast_read
2013/7/5 Sourav Poddar :
> On Friday 05 July 2013 02:47 PM, yuhang wang wrote:
>>
>> 2013/7/5 Sourav Poddar:
>>>
>>> On Friday 05 July 2013 02:37 PM, yuhang wang wrote:
>
> if (!quad_mode)
> dra7xxx_writel(qspi, qspi->cmd |
> QSPI_
>> Flash data sheets use the terms Dual and Quad I/O Mode,
>> e.g. for MX25L25635E
>> http://www.macronix.com/QuickPlace/hq/PageLibrary4825740B00298A3B.nsf/h_Index/6F878CF760C559BD482576E00022E6CC/?OpenDocument&EPN=MX25L25635E
>
> OK, but this is not a flash specific feature but rather something at
On Friday 05 July 2013 02:47 PM, yuhang wang wrote:
> 2013/7/5 Sourav Poddar:
>> On Friday 05 July 2013 02:37 PM, yuhang wang wrote:
if (!quad_mode)
dra7xxx_writel(qspi, qspi->cmd |
QSPI_RD_SNGL,
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2013/7/5 Sourav Poddar :
> On Friday 05 July 2013 02:37 PM, yuhang wang wrote:
>>>
>>> if (!quad_mode)
>>> dra7xxx_writel(qspi, qspi->cmd |
>>> QSPI_RD_SNGL,
>>> QSPI_SPI_CMD_REG);
>>>
On Friday 05 July 2013 02:37 PM, yuhang wang wrote:
>> if (!quad_mode)
>> dra7xxx_writel(qspi, qspi->cmd | QSPI_RD_SNGL,
>> QSPI_SPI_CMD_REG);
>> else
>>
> if (!quad_mode)
> dra7xxx_writel(qspi, qspi->cmd | QSPI_RD_SNGL,
> QSPI_SPI_CMD_REG);
> else
> dra7xxx_writel(qspi, qspi->cmd | QSPI_RD_QUAD,
>
On Friday 05 July 2013 02:18 PM, yuhang wang wrote:
>> To add to all the discussion going on,
>> I am using a qspi controller with a spansion flash device.
>> I tried using quad read mode bit, and what is required to change in
>> my case is the following:
>>
>> 1. enable quad mode in flash configur
> To add to all the discussion going on,
> I am using a qspi controller with a spansion flash device.
> I tried using quad read mode bit, and what is required to change in
> my case is the following:
>
> 1. enable quad mode in flash configuration register.
> 2. change my read opcode to QUAD READ op
> > [Pekon]: Does below generic framework for spianand, suit your driver?
> > http://lists.infradead.org/pipermail/linux-mtd/2013-July/047434.html
> >
> > you should be able to extend the generic spinand API for all
> > serial modes (SPI, Dual-SPI, Quad-SPI).
> > As QSPI and Dual-SPI devices should
On Friday 05 July 2013 01:05 PM, Johannes Stezenbach wrote:
> On Fri, Jul 05, 2013 at 06:45:01AM +, Gupta, Pekon wrote:
>>> Just as Johannes said. In my patch m25p80's changes is incomplete.
>>> Because my inicial aim is to add the transfer width member to tell
>>> controller
>>> the mode flas
On Friday 05 July 2013 11:55 AM, yuhang wang wrote:
> Hi Thomas:
>
>>> Well, there's two bits here. One is the support in the client drivers
>>> for using the extra data lines and the other is the support in the SPI
>>> core for telling controllers to do this. We need that second bit in
>>> place
On Fri, Jul 05, 2013 at 06:45:01AM +, Gupta, Pekon wrote:
>
> > Just as Johannes said. In my patch m25p80's changes is incomplete.
> > Because my inicial aim is to add the transfer width member to tell
> > controller
> > the mode flash in. And I will attach new patch about m25p80 later.
> > A
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