Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
mtd: spinand: Add support for setting a bus interface
Create a bus interface enumeration, currently only containing the
one we support: SSDR, for single SDR, so any operation whose command is
sent over a single data line in SDR mode, ie. any operation matching
1S-XX-XX.
The main spinand_device structure gets a new parameter to store this
enumeration, for now unused. Of course it is set to SSDR during the SSDR
templates initialization to further clarify the state we are in at the
moment.
This member is subject to be used to know in which bus configuration we
and be updated by the core when we switch to faster mode(s).
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
+11
+1
drivers/mtd/nand/spi/core.c
+1
drivers/mtd/nand/spi/core.c
···
1407
1407
tmpl->page_read = (struct spi_mem_op)SPINAND_PAGE_READ_1S_1S_0_OP(0);
1408
1408
tmpl->prog_exec = (struct spi_mem_op)SPINAND_PROG_EXEC_1S_1S_0_OP(0);
1409
1409
spinand->op_templates = &spinand->ssdr_op_templates;
1410
+
spinand->bus_iface = SSDR;
1410
1411
}
1411
1412
1412
1413
static int spinand_support_vendor_ops(struct spinand_device *spinand,
+10
include/linux/mtd/spinand.h
+10
include/linux/mtd/spinand.h
···
483
483
};
484
484
485
485
/**
486
+
* enum spinand_bus_interface - SPI NAND bus interface types
487
+
* @SSDR: Bus configuration supporting all 1S-XX-XX operations, including dual and quad
488
+
*/
489
+
enum spinand_bus_interface {
490
+
SSDR,
491
+
};
492
+
493
+
/**
486
494
* struct spinand_info - Structure used to describe SPI NAND chips
487
495
* @model: model name
488
496
* @devid: device ID
···
652
644
* @flags: NAND flags
653
645
* @ssdr_op_templates: Templates for all single SDR SPI mem operations
654
646
* @op_templates: Templates for all SPI mem operations
647
+
* @bus_iface: Current bus interface
655
648
* @select_target: select a specific target/die. Usually called before sending
656
649
* a command addressing a page or an eraseblock embedded in
657
650
* this die. Only required if your chip exposes several dies
···
688
679
689
680
struct spinand_mem_ops ssdr_op_templates;
690
681
struct spinand_mem_ops *op_templates;
682
+
enum spinand_bus_interface bus_iface;
691
683
692
684
struct spinand_dirmap *dirmaps;
693
685