Hi, Am 2021-11-17 03:48, schrieb chaochao2021...@163.com:
From: chao zeng <chao.z...@siemens.com>When operating the write-protection flash,spi_flash_std_write() and spi_flash_std_erase() would return wrong result.The flash is protected, but write or erase the flash would show "OK". Check the flash write protection state before operating the flash and give a prompt to show it has been locked if the write-protection has enbale Signed-off-by: chao zeng <chao.z...@siemens.com> --- Changes for V2: - Return 0 not ENOPROTOOPT to refelect the flash feature - Output prompt information Changes for V3: - Modify output information - Delete return statement --- drivers/mtd/spi/sf_probe.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/mtd/spi/sf_probe.c b/drivers/mtd/spi/sf_probe.c index f461082e03..f9e879aec5 100644 --- a/drivers/mtd/spi/sf_probe.c +++ b/drivers/mtd/spi/sf_probe.c @@ -109,6 +109,9 @@ static int spi_flash_std_write(struct udevice *dev, u32 offset, size_t len, struct mtd_info *mtd = &flash->mtd; size_t retlen;+ if (flash->flash_is_locked && flash->flash_is_locked(flash, offset, len)) + printf("SF: Operate on the protected area.Writes will be ignored\n");
I don't think this is the correct place for this output. This could also be called from a board file programmatically and then it might display this error, which is annoying. Also, this is issuing an additional command "read SR" for every write. What is your intention here? To make the user aware that he is going to write to a write-protected region when he is using the "sf" command? If that is the case, this should be added to that command instead.
+ return mtd->_write(mtd, offset, len, &retlen, buf); } @@ -127,6 +130,9 @@ static int spi_flash_std_erase(struct udevice *dev, u32 offset, size_t len) instr.addr = offset; instr.len = len;+ if (flash->flash_is_locked && flash->flash_is_locked(flash, offset, len))+ printf("SF: Operate on the protected area.Erase will be ignored\n");
likewise. -michael
