Hi, one more request
On 16/11/2015 18:03, 未命名 wrote: > Instead of use the set_4byte function in spi-nor.c, I use this patch > for simplest modification. In fact, set_4byte also send 0xe9 command to > the spi flash. > > Signed-off-by: Shonn Lu <countryside...@qq.com> > --- > .../0064-reset-m25p80-when-shutdown.patch | 27 > ++++++++++++++++++++++ > 1 file changed, 27 insertions(+) > create mode 100644 > target/linux/ramips/patches-3.18/0064-reset-m25p80-when-shutdown.patch > > diff --git > a/target/linux/ramips/patches-3.18/0064-reset-m25p80-when-shutdown.patch > b/target/linux/ramips/patches-3.18/0064-reset-m25p80-when-shutdown.patch > new file mode 100644 > index 0000000..aca758d > --- /dev/null > +++ b/target/linux/ramips/patches-3.18/0064-reset-m25p80-when-shutdown.patch > @@ -0,0 +1,27 @@ > +--- a/drivers/mtd/devices/m25p80.c > ++++ b/drivers/mtd/devices/m25p80.c > +@@ -322,6 +322,16 @@ > + { > + struct m25p *flash = spi_get_drvdata(spi); > + > ++ if ((&flash->spi_nor)->addr_width > 3) { > ++ printk(KERN_INFO "m25p80: exit 4-byte address mode\n"); > ++ flash->command[0] = SPINOR_OP_EX4B; // exit 4-byte address mode: 0xe9 > ++ spi_write(flash->spi, flash->command, 1); > ++ flash->command[0] = 0x66; // enable reset > ++ spi_write(flash->spi, flash->command, 1); > ++ flash->command[0] = 0x99; // reset > ++ spi_write(flash->spi, flash->command, 1); this needs to be indented with tabs John > ++ } > ++ > + /* Clean up MTD stuff. */ > + return mtd_device_unregister(&flash->mtd); > + } > +@@ -385,6 +395,7 @@ > + .id_table = m25p_ids, > + .probe = m25p_probe, > + .remove = m25p_remove, > ++ .shutdown = m25p_remove, // add shutdown method to reset spi flash > + > + /* REVISIT: many of these chips have deep power-down modes, which > + * should clearly be entered on suspend() to minimize power use. > -- > 1.9.1 > > > _______________________________________________ > openwrt-devel mailing list > openwrt-devel@lists.openwrt.org > https://lists.openwrt.org/cgi-bin/mailman/listinfo/openwrt-devel > _______________________________________________ openwrt-devel mailing list openwrt-devel@lists.openwrt.org https://lists.openwrt.org/cgi-bin/mailman/listinfo/openwrt-devel