RE: [PATCH 03/11] spi: Add a driver for the Freescale/NXP QuadSPI controller

From: Yogesh Narayan Gaur
Date: Fri Jun 15 2018 - 09:42:22 EST

Hi Boris,

I am still debugging the issue.
With some analysis, able to check that proper values are not being written for QUADSPI_SFA2AD/ QUADSPI_SFB1AD/ QUADSPI_SFB2AD register.

In current code, value of map_addr are being assigned to these register.
map_addr = q->memmap_phy +
2 * q->devtype_data->ahb_buf_size;

qspi_writel(q, map_addr, q->iobase + QUADSPI_SFA1AD + (i * 4));

But instead of "q->devtype_data->ahb_buf_size" it should be flash size.
For my case flash size is 0x4000000 and with this hard coded value I am able to perform Write and Erase operation.
One more change, I have to do is adding the flash_size when writing the base_address in SFAR register for case when "mem->spi->chip_select == 1"
qspi_writel(q, q->memmap_phy + 0x4000000, base + QUADSPI_SFAR);

Thus, there should be mechanism or the entry in structure where we can have the information of the size of the connected slave device.

With both of above hardcoded changes, I am able to perform Write and Erase operation on my second flash device but still facing issue in Read operation, debugging in progress for that.

Yogesh Gaur

-----Original Message-----
From: Boris Brezillon [mailto:boris.brezillon@xxxxxxxxxxx]
Sent: Friday, June 15, 2018 6:20 PM
To: Yogesh Narayan Gaur <yogeshnarayan.gaur@xxxxxxx>
Cc: richard@xxxxxx; Prabhakar Kushwaha <prabhakar.kushwaha@xxxxxxx>; Han Xu <han.xu@xxxxxxx>; linux-kernel@xxxxxxxxxxxxxxx; linux-spi@xxxxxxxxxxxxxxx; marek.vasut@xxxxxxxxx; Frieder Schrempf <frieder.schrempf@xxxxxxxxx>; broonie@xxxxxxxxxx; linux-mtd@xxxxxxxxxxxxxxxxxxx; miquel.raynal@xxxxxxxxxxx; Fabio Estevam <fabio.estevam@xxxxxxx>; David Wolfe <david.wolfe@xxxxxxx>; computersforpeace@xxxxxxxxx; dwmw2@xxxxxxxxxxxxx
Subject: Re: [PATCH 03/11] spi: Add a driver for the Freescale/NXP QuadSPI controller

On Tue, 12 Jun 2018 08:51:25 +0000
Yogesh Narayan Gaur <yogeshnarayan.gaur@xxxxxxx> wrote:

> I am working on lsxxx platform. With further debugging, I found that my erase operation for second flash device is not working properly.
> Need to have debugging for this in Frieder Patch.

Did you find the problem? Could it be a wrong "reg = <>" definition in your DT (Frieder changed the CS numbering scheme in the new driver)?