From: Hou Zhiqiang <[email protected]>
To be compatible with legacy device, reset the addressing mode
to the default mode. Such as Freescale eSPI boot, it copies the
images from SPI flash without firing a reset signal previously,
so the reboot command will fail without reseting the addressing
mode of SPI flash.
Hou Zhiqiang (2):
mtd: spi-nor: add a API to restore the addressing mode
mtd: m25p80: restore the addressing mode when stop using the flash
drivers/mtd/devices/m25p80.c | 8 ++++++++
drivers/mtd/spi-nor/spi-nor.c | 8 ++++++++
include/linux/mtd/spi-nor.h | 1 +
3 files changed, 17 insertions(+)
--
2.14.1
From 1584942877362846936@xxx Fri Nov 24 10:28:35 +0000 2017
X-GM-THRID: 1584942877362846936
X-Gmail-Labels: Inbox,Category Forums,HistoricalUnread
From: Hou Zhiqiang <[email protected]>
Add .shutdown function to restore the addressing mode in reboot
process, and add the same operation to the .remove function.
Signed-off-by: Hou Zhiqiang <[email protected]>
---
drivers/mtd/devices/m25p80.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/drivers/mtd/devices/m25p80.c b/drivers/mtd/devices/m25p80.c
index dbe6a1de2bb8..867bd2d5a267 100644
--- a/drivers/mtd/devices/m25p80.c
+++ b/drivers/mtd/devices/m25p80.c
@@ -307,10 +307,17 @@ static int m25p_remove(struct spi_device *spi)
{
struct m25p *flash = spi_get_drvdata(spi);
+ spi_nor_restore_addr_mode(&flash->spi_nor);
/* Clean up MTD stuff. */
return mtd_device_unregister(&flash->spi_nor.mtd);
}
+static void m25p_shutdown(struct spi_device *spi)
+{
+ struct m25p *flash = spi_get_drvdata(spi);
+
+ spi_nor_restore_addr_mode(&flash->spi_nor);
+}
/*
* Do NOT add to this array without reading the following:
*
@@ -386,6 +393,7 @@ static struct spi_driver m25p80_driver = {
.id_table = m25p_ids,
.probe = m25p_probe,
.remove = m25p_remove,
+ .shutdown = m25p_shutdown,
/* REVISIT: many of these chips have deep power-down modes, which
* should clearly be entered on suspend() to minimize power use.
--
2.14.1
From 1585562231949657366@xxx Fri Dec 01 06:32:57 +0000 2017
X-GM-THRID: 1585562231949657366
X-Gmail-Labels: Inbox,Category Forums,HistoricalUnread