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authorBrian Norris <computersforpeace@gmail.com>2016-01-29 11:25:35 -0800
committerBrian Norris <computersforpeace@gmail.com>2016-03-07 18:01:57 -0800
commit76a4707de5e18dc32d9cb4e990686140c5664a15 (patch)
tree51e3aa5ca1b1f79246e3d6cb9e57a1b7c8bcad9e /drivers/mtd
parent0618114e2c5dd059f8d22787e62e3f1723af68fc (diff)
downloadop-kernel-dev-76a4707de5e18dc32d9cb4e990686140c5664a15.zip
op-kernel-dev-76a4707de5e18dc32d9cb4e990686140c5664a15.tar.gz
mtd: spi-nor: add SPI_NOR_HAS_LOCK flag
We can't determine this purely by manufacturer type (see commit 67b9bcd36906 ("mtd: spi-nor: fix Spansion regressions (aliased with Winbond)")), and it's not autodetectable by anything like SFDP. So make a new flag for it. Signed-off-by: Brian Norris <computersforpeace@gmail.com> Reviewed-by: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar> Tested-by: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>
Diffstat (limited to 'drivers/mtd')
-rw-r--r--drivers/mtd/spi-nor/spi-nor.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/mtd/spi-nor/spi-nor.c b/drivers/mtd/spi-nor/spi-nor.c
index 72d87c2..d1edafc 100644
--- a/drivers/mtd/spi-nor/spi-nor.c
+++ b/drivers/mtd/spi-nor/spi-nor.c
@@ -69,6 +69,7 @@ struct flash_info {
#define SPI_NOR_DUAL_READ BIT(5) /* Flash supports Dual Read */
#define SPI_NOR_QUAD_READ BIT(6) /* Flash supports Quad Read */
#define USE_FSR BIT(7) /* use flag status register */
+#define SPI_NOR_HAS_LOCK BIT(8) /* Flash supports lock/unlock via SR */
};
#define JEDEC_MFR(info) ((info)->id[0])
@@ -1237,7 +1238,8 @@ int spi_nor_scan(struct spi_nor *nor, const char *name, enum read_mode mode)
if (JEDEC_MFR(info) == SNOR_MFR_ATMEL ||
JEDEC_MFR(info) == SNOR_MFR_INTEL ||
- JEDEC_MFR(info) == SNOR_MFR_SST) {
+ JEDEC_MFR(info) == SNOR_MFR_SST ||
+ info->flags & SPI_NOR_HAS_LOCK) {
write_enable(nor);
write_sr(nor, 0);
spi_nor_wait_till_ready(nor);
@@ -1254,7 +1256,8 @@ int spi_nor_scan(struct spi_nor *nor, const char *name, enum read_mode mode)
mtd->_read = spi_nor_read;
/* NOR protection support for STmicro/Micron chips and similar */
- if (JEDEC_MFR(info) == SNOR_MFR_MICRON) {
+ if (JEDEC_MFR(info) == SNOR_MFR_MICRON ||
+ info->flags & SPI_NOR_HAS_LOCK) {
nor->flash_lock = stm_lock;
nor->flash_unlock = stm_unlock;
nor->flash_is_locked = stm_is_locked;
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