mtd: spi-nor-core: Rework spi_nor_cypress_octal_dtr_enable()
Enabling Octal DTR mode in multi-die package parts requires reister setup
for each die. That can be done by simple for-loop. write_enable() takes
effect to all die at once so we can call it before the loop. Besides we
can replace spi_mem_exec_op() calls with spansion_read/write_any_reg().
And finally, we must mask CFR2V[7:4] when changing dummy cycles, as
CFR2V[7] indicates current addressing mode and that should be 1 (4-byte
address mode) for multi-die package parts.
Signed-off-by: Takahiro Kuwano <Takahiro.Kuwano@infineon.com>
Reviewed-by: Jagan Teki <jagan@amarulasolutions.com>
diff --git a/include/linux/mtd/spi-nor.h b/include/linux/mtd/spi-nor.h
index 8a94e12..d1dbf3e 100644
--- a/include/linux/mtd/spi-nor.h
+++ b/include/linux/mtd/spi-nor.h
@@ -185,6 +185,7 @@
#define SPINOR_REG_CYPRESS_STR1V 0x00800000
#define SPINOR_REG_CYPRESS_CFR1V 0x00800002
#define SPINOR_REG_CYPRESS_CFR2V 0x00800003
+#define SPINOR_REG_CYPRESS_CFR2_MEMLAT_MASK GENMASK(3, 0)
#define SPINOR_REG_CYPRESS_CFR2_MEMLAT_11_24 0xb
#define SPINOR_REG_CYPRESS_CFR3V 0x00800004
#define SPINOR_REG_CYPRESS_CFR3_PGSZ BIT(4) /* Page size. */