Thread (19 messages) 19 messages, 2 authors, 2019-02-01

Re: [PATCH v2 10/10] spi: atmel-quadspi: add support for sam9x60 qspi controller

From: <hidden>
Date: 2019-02-01 14:49:35
Also in: linux-devicetree, linux-spi, lkml


On 02/01/2019 09:57 AM, Boris Brezillon wrote:
On Fri, 1 Feb 2019 07:07:40 +0000
[off-list ref] wrote:
quoted
quoted
  
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 #define QSPI_IFR_TFRTYP_MASK            GENMASK(13, 12)
 #define QSPI_IFR_TFRTYP_TRSFR_READ      (0 << 12)
 #define QSPI_IFR_TFRTYP_TRSFR_READ_MEM  (1 << 12)  
Looks like the read/write flag is on bit 13. Can we just add  
for sama5d2 only
Feel free to prefix macros with the SoC name to make it clear:

#define QSPI_IFR_SAMA5D2_WRITE_TRSFR		BIT(13)
agreed
cut
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+#define QSPI_IFR_APBTFRTYP_READ		BIT(24)
And this one would be

define QSPI_IFR_SAM9X60_READ_TRSFR		BIT(24)
I prefer letting this bit named as in the datasheet, QSPI_IFR_APBTFRTYP_READ,
and change it if future versions of the IP will modify its sense. It is a READ
transfer done on APB, it is more generic this way. If you have a strong opinion
on this, please let me know.

ta
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