linux/arch
Faiz Abbas fb59ee37cf ARM: dts: am57xx: Disable voltage switching for SD card
If UHS speed modes are enabled, a compatible SD card switches down to
1.8V during enumeration. If after this a software reboot/crash takes
place and on-chip ROM tries to enumerate the SD card, the difference in
IO voltages (host @ 3.3V and card @ 1.8V) may end up damaging the card.

The fix for this is to have support for power cycling the card in
hardware (with a PORz/soft-reset line causing a power cycle of the
card). Because the beaglebone X15 (rev A,B and C), am57xx-idks and
am57xx-evms don't have this capability, disable voltage switching for
these boards.

The major effect of this is that the maximum supported speed
mode is now high speed(50 MHz) down from SDR104(200 MHz).

commit 88a748419b ("ARM: dts: am57xx-idk: Remove support for voltage
switching for SD card") did this only for idk boards. Do it for all
affected boards.

Signed-off-by: Faiz Abbas <faiz_abbas@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
2019-06-27 04:38:32 -07:00
..
alpha alpha: move arch/alpha/defconfig to arch/alpha/configs/defconfig 2019-05-18 11:49:55 +09:00
arc asm-generic: kill <asm/segment.h> and improve nommu generic uaccess helpers 2019-05-16 11:26:37 -07:00
arm ARM: dts: am57xx: Disable voltage switching for SD card 2019-06-27 04:38:32 -07:00
arm64 Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2019-05-19 10:58:45 -07:00
c6x asm-generic: kill <asm/segment.h> and improve nommu generic uaccess helpers 2019-05-16 11:26:37 -07:00
csky arch: remove dangling asm-generic wrappers 2019-05-18 11:49:52 +09:00
h8300 arch: remove dangling asm-generic wrappers 2019-05-18 11:49:52 +09:00
hexagon asm-generic: kill <asm/segment.h> and improve nommu generic uaccess helpers 2019-05-16 11:26:37 -07:00
ia64 ia64: require -Wl,--hash-style=sysv 2019-05-18 11:29:01 +09:00
m68k Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2019-05-17 09:46:31 -07:00
microblaze Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2019-05-17 09:46:31 -07:00
mips Kbuild updates for v5.2 (2nd) 2019-05-19 11:53:58 -07:00
nds32 arch: remove dangling asm-generic wrappers 2019-05-18 11:49:52 +09:00
nios2 asm-generic: kill <asm/segment.h> and improve nommu generic uaccess helpers 2019-05-16 11:26:37 -07:00
openrisc asm-generic: kill <asm/segment.h> and improve nommu generic uaccess helpers 2019-05-16 11:26:37 -07:00
parisc Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2019-05-17 09:46:31 -07:00
powerpc Merge branch 'akpm' (patches from Andrew) 2019-05-19 12:15:32 -07:00
riscv Kbuild updates for v5.2 (2nd) 2019-05-19 11:53:58 -07:00
s390 * ARM: support for SVE and Pointer Authentication in guests, PMU improvements 2019-05-17 10:33:30 -07:00
sh treewide: prefix header search paths with $(srctree)/ 2019-05-18 11:49:57 +09:00
sparc Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2019-05-17 09:46:31 -07:00
um Merge branch 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2019-05-19 10:23:24 -07:00
unicore32 Merge branch 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2019-05-19 10:23:24 -07:00
x86 Kbuild updates for v5.2 (2nd) 2019-05-19 11:53:58 -07:00
xtensa treewide: prefix header search paths with $(srctree)/ 2019-05-18 11:49:57 +09:00
.gitignore
Kconfig Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2019-05-16 11:00:20 -07:00