lkml.org 
[lkml]   [2019]   [Aug]   [1]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [PATCH v3 2/3] mtd: spi-nor: Move m25p80 code in spi-nor.c
From
Date


On 01/08/19 11:22 AM, Boris Brezillon wrote:
> On Thu, 1 Aug 2019 10:00:51 +0530
> Vignesh Raghavendra <vigneshr@ti.com> wrote:
>
>> From: Boris Brezillon <boris.brezillon@bootlin.com>
>>
>> The m25p80 driver is actually a generic wrapper around the spi-mem
>> layer. Not only the driver name is misleading, but we'd expect such a
>> common logic to be directly available in the core. Another reason for
>> moving this code is that SPI NOR controller drivers should
>> progressively be replaced by SPI controller drivers implementing the
>> spi_mem_ops interface, and when the conversion is done, we should have
>> a single spi-nor driver directly interfacing with the spi-mem layer.
>>
>> While moving the code we also fix a longstanding issue when
>> non-DMA-able buffers are passed by the MTD layer.
>>
>> Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
>> Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
>> ---
>> v3:
>> Simplify register read/write by dropping spi_nor_exec_op() and using
>> spi_mem_exec_op() directly
>> Modify spi_nor_spimem_xfer_data() to drop "enum spi_nor_protocol proto"
>> Fix misc coding style comments by Tudor
>>
>> v2:
>> Add docs for new functions added
>> Add spi_nor_ prefix to new functions
>> Incorporate Andrey's patches https://lkml.org/lkml/2019/4/1/32
>> to avoid looping spi_nor_spimem_* APIs
>>
>> drivers/mtd/devices/Kconfig | 18 -
>> drivers/mtd/devices/Makefile | 1 -
>> drivers/mtd/devices/m25p80.c | 347 -------------------
>> drivers/mtd/spi-nor/Kconfig | 2 +
>> drivers/mtd/spi-nor/spi-nor.c | 632 ++++++++++++++++++++++++++++++++--
>> include/linux/mtd/spi-nor.h | 3 +
>> 6 files changed, 604 insertions(+), 399 deletions(-)
>> delete mode 100644 drivers/mtd/devices/m25p80.c
>>
>
> [...]
>
>
>> @@ -348,6 +530,16 @@ static int read_cr(struct spi_nor *nor)
>> */
>> static int write_sr(struct spi_nor *nor, u8 val)
>> {
>> + if (nor->spimem) {
>> + struct spi_mem_op op =
>> + SPI_MEM_OP(SPI_MEM_OP_CMD(SPINOR_OP_WRSR, 1),
>> + SPI_MEM_OP_NO_ADDR,
>> + SPI_MEM_OP_NO_DUMMY,
>> + SPI_MEM_OP_DATA_IN(1, nor->bouncebuf, 1));
>> +
>> + return spi_mem_exec_op(nor->spimem, &op);
>> + }
>> +
>> nor->bouncebuf[0] = val;
>
> The above line should be moved at the beginning of the function if you
> want the spimem path to work correctly.


Good catch! will send v4 with this fixed


--
Regards
Vignesh

\
 
 \ /
  Last update: 2019-08-01 08:46    [W:0.064 / U:0.028 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site