linux/arch/arm
Martin Fuzzey 1579c7b9fe ARM: imx53: Set DDR pins to high impedance when in suspend to RAM.
In order to save power the DDR pins should be put into high
impedance when in suspend to RAM.

This requires manually requesting self refresh (rather than using the
automatic mode implemented by the CCM / ESDCTL), followed by
reconfiguring the IOMUXC.

Of course the code to do this cannot itself run from DDR so the
code is copied to and executed from internal memory.

In my tests using a custom i.MX53 board with LPDDR2 RAM
this reduced the suspend power consumption from 200mW to 60mW.

Signed-off-by: Martin Fuzzey <mfuzzey@parkeon.com>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
2015-06-03 14:49:36 +08:00
..
boot Merge git://www.linux-watchdog.org/linux-watchdog 2015-04-22 11:22:55 -07:00
common ARM: SoC platform updates for v4.1 2015-04-22 09:08:39 -07:00
configs ARM: SoC defconfig updates for v4.1 2015-04-22 09:21:30 -07:00
crypto Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2015-04-15 10:42:15 -07:00
firmware
include ARM: imx7d: add low level debug uart support 2015-06-03 14:49:35 +08:00
kernel Merge branch 'for-linus' of git://ftp.arm.linux.org.uk/~rmk/linux-arm 2015-04-24 08:10:53 -07:00
kvm This mostly includes the PPC changes for 4.1, which this time cover 2015-04-26 13:06:22 -07:00
lib ARM: ensure delay timer has sufficient accuracy for delays 2015-04-14 22:28:07 +01:00
mach-alpine ARM: alpine: add support for generic pci 2015-04-14 01:15:57 +02:00
mach-asm9260
mach-at91 Fourth batch of cleanup for 4.1: 2015-04-14 01:50:21 +02:00
mach-axxia
mach-bcm ARM: cygnus: fix const declaration bcm_cygnus_dt_compat 2015-03-24 15:13:23 -07:00
mach-berlin
mach-clps711x
mach-cns3xxx ARM: cns3xxx: don't export static symbol 2015-03-13 11:02:15 +01:00
mach-davinci ARM: DT updates for v4.1 2015-04-22 09:09:46 -07:00
mach-digicolor
mach-dove PCI: Cleanup control flow 2015-03-19 10:17:22 -05:00
mach-ebsa110
mach-efm32
mach-ep93xx
mach-exynos ARM: SoC driver updates for v4.1 2015-04-22 09:18:17 -07:00
mach-footbridge
mach-gemini
mach-highbank
mach-hisi
mach-imx ARM: imx53: Set DDR pins to high impedance when in suspend to RAM. 2015-06-03 14:49:36 +08:00
mach-integrator
mach-iop13xx
mach-iop32x
mach-iop33x
mach-ixp4xx
mach-keystone
mach-ks8695
mach-lpc32xx
mach-mediatek ARM: mediatek: enable the pin controller 2015-03-10 14:31:10 +01:00
mach-meson
mach-mmp
mach-moxart
mach-mv78xx0 PCI: Cleanup control flow 2015-03-19 10:17:22 -05:00
mach-mvebu ARM: SoC platform updates for v4.1 2015-04-22 09:08:39 -07:00
mach-mxs
mach-netx
mach-nomadik
mach-nspire
mach-omap1 ARM: OMAP1: PM: fix some build warnings on 1510-only Kconfigs 2015-03-16 16:09:23 -07:00
mach-omap2 ARM: SoC late changes for v4.1 2015-04-22 09:24:55 -07:00
mach-orion5x PCI: Cleanup control flow 2015-03-19 10:17:22 -05:00
mach-picoxcell
mach-prima2
mach-pxa power supply and reset changes for the v4.1 series 2015-04-13 15:21:34 -07:00
mach-qcom firmware: qcom: scm: Clean cold boot entry to export only the API 2015-03-11 15:15:05 -05:00
mach-realview
mach-rockchip ARM: rockchip: disable watchdog during suspend 2015-03-11 22:41:02 +01:00
mach-rpc
mach-s3c24xx
mach-s3c64xx ARM: SoC platform updates for v4.1 2015-04-22 09:08:39 -07:00
mach-s5pv210 ARM: 8326/1: s5pv210: move resume code to .text section 2015-03-29 23:11:58 +01:00
mach-sa1100
mach-shmobile Merge branch 'for-linus' of git://git.infradead.org/users/vkoul/slave-dma 2015-04-24 09:49:37 -07:00
mach-socfpga
mach-spear
mach-sti ARM: STi: Add STiH410 SoC support 2015-03-11 15:34:45 +01:00
mach-sunxi
mach-tegra Power management and ACPI updates for v4.1-rc1 2015-04-14 20:21:54 -07:00
mach-u300
mach-ux500 ARM: ux500: switch from gic_arch_extn to gic_set_irqchip_flags 2015-03-15 01:28:11 +00:00
mach-versatile
mach-vexpress ARM: SoC driver updates for v4.1 2015-04-22 09:18:17 -07:00
mach-vt8500
mach-w90x900
mach-zynq ARM: zynq: switch from gic_arch_extn to gic_set_irqchip_flags 2015-03-15 01:28:12 +00:00
mm Merge branch 'for-linus' of git://ftp.arm.linux.org.uk/~rmk/linux-arm 2015-04-24 08:10:53 -07:00
net
nwfpe ARM: 8322/1: keep .text and .fixup regions closer together 2015-03-29 23:11:56 +01:00
oprofile
plat-iop
plat-omap ARM, clocksource/drivers: Provide read_boot_clock64() and read_persistent_clock64() and use them 2015-04-03 08:18:23 +02:00
plat-orion
plat-pxa ARM: plat-pxa: remove use of seq_printf return value 2015-04-15 16:35:25 -07:00
plat-samsung
plat-versatile
probes
tools
vdso ARM: 8344/1: VDSO: honor CONFIG_VDSO in Makefile 2015-04-21 15:28:02 +01:00
vfp
xen xen/privcmd: improve performance of MMAPBATCH_V2 2015-03-16 14:49:15 +00:00
Kconfig ARM: SoC multiplatform code changes for v4.1 2015-04-22 09:20:15 -07:00
Kconfig-nommu
Kconfig.debug ARM: imx7d: add low level debug uart support 2015-06-03 14:49:35 +08:00
Makefile ARM: SoC platform updates for v4.1 2015-04-22 09:08:39 -07:00