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spi: spi-mem: Add an ecc parameter to the spi_mem_op structure

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Soon the SPI-NAND core will need a way to request a SPI controller to
enable ECC support for a given operation. This is because of the
pipelined integration of certain ECC engines, which are directly managed
by the SPI controller itself.

Introduce a spi_mem_op additional field for this purpose: ecc.

So far this field is left unset and checked to be false by all
the SPI controller drivers in their ->supports_op() hook, as they all
call spi_mem_default_supports_op().

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Acked-by: Pratyush Yadav <p.yadav@ti.com>
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
Reviewed-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Link: https://lore.kernel.org/linux-mtd/20220127091808.1043392-7-miquel.raynal@bootlin.com
This commit is contained in:
Miquel Raynal
2022-01-27 10:18:01 +01:00
parent 9a15efc5d5
commit a433c2cbd7
2 changed files with 9 additions and 0 deletions
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4
include/linux/spi/spi-mem.h
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@@ -89,6 +89,7 @@ enum spi_mem_data_dir {
* @dummy.dtr: whether the dummy bytes should be sent in DTR mode or not
* @data.buswidth: number of IO lanes used to send/receive the data
* @data.dtr: whether the data should be sent in DTR mode or not
* @data.ecc: whether error correction is required or not
* @data.dir: direction of the transfer
* @data.nbytes: number of data bytes to send/receive. Can be zero if the
* operation does not involve transferring data
@@ -119,6 +120,7 @@ struct spi_mem_op {
struct {
u8 buswidth;
u8 dtr : 1;
u8 ecc : 1;
enum spi_mem_data_dir dir;
unsigned int nbytes;
union {
@@ -288,9 +290,11 @@ struct spi_controller_mem_ops {
/**
* struct spi_controller_mem_caps - SPI memory controller capabilities
* @dtr: Supports DTR operations
* @ecc: Supports operations with error correction
*/
struct spi_controller_mem_caps {
bool dtr;
bool ecc;
};
#define spi_mem_controller_is_capable(ctlr, cap) \