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- From 9e7eb0ea442ecb1c3fe443289e288694f10c5148 Mon Sep 17 00:00:00 2001
- From: Miquel Raynal <[email protected]>
- Date: Thu, 27 Jan 2022 10:18:01 +0100
- Subject: [PATCH 07/15] spi: spi-mem: Add an ecc parameter to the spi_mem_op
- structure
- 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 <[email protected]>
- Acked-by: Pratyush Yadav <[email protected]>
- Reviewed-by: Boris Brezillon <[email protected]>
- Reviewed-by: Tudor Ambarus <[email protected]>
- Link: https://lore.kernel.org/linux-mtd/[email protected]
- (cherry picked from commit a433c2cbd75ab76f277364f44e76f32c7df306e7)
- ---
- drivers/spi/spi-mem.c | 5 +++++
- include/linux/spi/spi-mem.h | 4 ++++
- 2 files changed, 9 insertions(+)
- --- a/drivers/spi/spi-mem.c
- +++ b/drivers/spi/spi-mem.c
- @@ -178,6 +178,11 @@ bool spi_mem_default_supports_op(struct
- return false;
- }
-
- + if (op->data.ecc) {
- + if (!spi_mem_controller_is_capable(ctlr, ecc))
- + return false;
- + }
- +
- return spi_mem_check_buswidth(mem, op);
- }
- EXPORT_SYMBOL_GPL(spi_mem_default_supports_op);
- --- a/include/linux/spi/spi-mem.h
- +++ b/include/linux/spi/spi-mem.h
- @@ -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) \
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