diff options
Diffstat (limited to 'target/linux/layerscape/patches-4.4/1086-mtd-spi-nor-wait-until-lock-unlock-operations-are-re.patch')
| -rw-r--r-- | target/linux/layerscape/patches-4.4/1086-mtd-spi-nor-wait-until-lock-unlock-operations-are-re.patch | 66 |
1 files changed, 0 insertions, 66 deletions
diff --git a/target/linux/layerscape/patches-4.4/1086-mtd-spi-nor-wait-until-lock-unlock-operations-are-re.patch b/target/linux/layerscape/patches-4.4/1086-mtd-spi-nor-wait-until-lock-unlock-operations-are-re.patch deleted file mode 100644 index 47f2c83..0000000 --- a/target/linux/layerscape/patches-4.4/1086-mtd-spi-nor-wait-until-lock-unlock-operations-are-re.patch +++ /dev/null @@ -1,66 +0,0 @@ -From 3a06c61b48fbc23046928275e37a693e1055ae74 Mon Sep 17 00:00:00 2001 -From: =?UTF-8?q?Ezequiel=20Garc=C3=ADa?= <ezequiel@vanguardiasur.com.ar> -Date: Mon, 28 Dec 2015 17:54:51 -0300 -Subject: [PATCH 086/113] mtd: spi-nor: wait until lock/unlock operations are - ready - -On Micron and Numonyx devices, the status register write command -(WRSR), raises a work-in-progress bit (WIP) on the status register. -The datasheets for these devices specify that while the status -register write is in progress, the status register WIP bit can still -be read to check the end of the operation. - -This commit adds a wait_till_ready call on lock/unlock operations, -which is required for Micron and Numonyx but should be harmless for -others. This is needed to prevent applications from issuing erase or -program operations before the unlock operation is completed. - -Reported-by: Stas Sergeev <stsp@list.ru> -Signed-off-by: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar> -Signed-off-by: Brian Norris <computersforpeace@gmail.com> ---- - drivers/mtd/spi-nor/spi-nor.c | 12 ++++++++++-- - 1 file changed, 10 insertions(+), 2 deletions(-) - ---- a/drivers/mtd/spi-nor/spi-nor.c -+++ b/drivers/mtd/spi-nor/spi-nor.c -@@ -482,6 +482,7 @@ static int stm_lock(struct spi_nor *nor, - int status_old, status_new; - u8 mask = SR_BP2 | SR_BP1 | SR_BP0; - u8 shift = ffs(mask) - 1, pow, val; -+ int ret; - - status_old = read_sr(nor); - if (status_old < 0) -@@ -520,7 +521,10 @@ static int stm_lock(struct spi_nor *nor, - return -EINVAL; - - write_enable(nor); -- return write_sr(nor, status_new); -+ ret = write_sr(nor, status_new); -+ if (ret) -+ return ret; -+ return spi_nor_wait_till_ready(nor); - } - - /* -@@ -534,6 +538,7 @@ static int stm_unlock(struct spi_nor *no - int status_old, status_new; - u8 mask = SR_BP2 | SR_BP1 | SR_BP0; - u8 shift = ffs(mask) - 1, pow, val; -+ int ret; - - status_old = read_sr(nor); - if (status_old < 0) -@@ -570,7 +575,10 @@ static int stm_unlock(struct spi_nor *no - return -EINVAL; - - write_enable(nor); -- return write_sr(nor, status_new); -+ ret = write_sr(nor, status_new); -+ if (ret) -+ return ret; -+ return spi_nor_wait_till_ready(nor); - } - - /* |