shinys000114/linux
1
0
Fork 0
mirror of https://github.com/hardkernel/linux.git synced 2026-06-06 10:58:48 +09:00
Code Issues Packages Projects Releases Wiki Activity

mtd: spi-nor: spansion: Consider reserved bits in CFR5 register

Browse Source 
commit 3f592a869f upstream.

CFR5[6] is reserved bit and must be always 1. Set it to comply with flash
requirements. While fixing SPINOR_REG_CYPRESS_CFR5V_OCT_DTR_{EN, DS}
definition, stop using magic numbers and describe the missing bit fields
in CFR5 register. This is useful for both readability and future possible
addition of Octal STR mode support.

Fixes: c3266af101 ("mtd: spi-nor: spansion: add support for Cypress Semper flash")
Cc: stable@vger.kernel.org
Reported-by: Takahiro Kuwano <Takahiro.Kuwano@infineon.com>
Signed-off-by: Tudor Ambarus <tudor.ambarus@linaro.org>
Reviewed-by: Dhruva Gole <d-gole@ti.com>
Reviewed-by: Pratyush Yadav <ptyadav@amazon.de>
Tested-by: Dhruva Gole <d-gole@ti.com>
Link: https://lore.kernel.org/linux-mtd/20230110164703.83413-1-tudor.ambarus@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Tudor Ambarus
2023-01-10 18:47:02 +02:00
committed by Greg Kroah-Hartman
parent 73a4cbf91e
commit afd61540ba
1 changed files with 7 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

9
drivers/mtd/spi-nor/spansion.c
View File

@@ -15,8 +15,13 @@
#define SPINOR_REG_CYPRESS_CFR3V 0x00800004
#define SPINOR_REG_CYPRESS_CFR3V_PGSZ BIT(4) /* Page size. */
#define SPINOR_REG_CYPRESS_CFR5V 0x00800006
#define SPINOR_REG_CYPRESS_CFR5V_OCT_DTR_EN 0x3
#define SPINOR_REG_CYPRESS_CFR5V_OCT_DTR_DS 0
#define SPINOR_REG_CYPRESS_CFR5_BIT6 BIT(6)
#define SPINOR_REG_CYPRESS_CFR5_DDR BIT(1)
#define SPINOR_REG_CYPRESS_CFR5_OPI BIT(0)
#define SPINOR_REG_CYPRESS_CFR5V_OCT_DTR_EN \
(SPINOR_REG_CYPRESS_CFR5_BIT6 | SPINOR_REG_CYPRESS_CFR5_DDR | \
SPINOR_REG_CYPRESS_CFR5_OPI)
#define SPINOR_REG_CYPRESS_CFR5V_OCT_DTR_DS SPINOR_REG_CYPRESS_CFR5_BIT6
#define SPINOR_OP_CYPRESS_RD_FAST 0xee
/**