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| author | Tony Lindgren <tony@atomide.com> | 2015-05-04 17:54:41 +0200 |
|---|---|---|
| committer | Tony Lindgren <tony@atomide.com> | 2015-05-04 17:54:41 +0200 |
| commit | 102bcb6ed2d1c3ffcc7269afc957c2df11942085 (patch) | |
| tree | 3b60828f50eb8bbd667973f92015fb352491ba2d /arch/arm/mach-omap2/prm-regbits-44xx.h | |
| parent | Linux 4.1-rc1 (diff) | |
| download | linux-102bcb6ed2d1c3ffcc7269afc957c2df11942085.tar.xz linux-102bcb6ed2d1c3ffcc7269afc957c2df11942085.zip | |
ARM: OMAP2+: Fix omap off idle power consumption creeping up
If we use a combination of VMODE and I2C4 for retention modes,
eventually the off idle power consumption will creep up by about
23mW, even during off mode with I2C4 always staying enabled.
Turns out this is because of erratum i531 "Extra Power Consumed
When Repeated Start Operation Mode Is Enabled on I2C Interface
Dedicated for Smart Reflex (I2C4)" as pointed out by Nishanth
Menon <nm@ti.com>.
Let's fix the issue by adding i2c_cfg_clear_mask for the bits
to clear when initializing the I2C4 adapter so we can clear
SREN bit that drives the I2C4 lines low otherwise when there
is no traffic.
Fixes: 3b8c4ebb7630 ("ARM: OMAP3: Fix idle mode signaling for
Cc: stable@vger.kernel.org # v3.16+
sys_clkreq and sys_off_mode")
Cc: Kevin Hilman <khilman@kernel.org>
Cc: Tero Kristo <t-kristo@ti.com>
Reviewed-by: Nishanth Menon <nm@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>
Diffstat (limited to 'arch/arm/mach-omap2/prm-regbits-44xx.h')
| -rw-r--r-- | arch/arm/mach-omap2/prm-regbits-44xx.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/arm/mach-omap2/prm-regbits-44xx.h b/arch/arm/mach-omap2/prm-regbits-44xx.h index b1c7a33e00e7..e794828dee55 100644 --- a/arch/arm/mach-omap2/prm-regbits-44xx.h +++ b/arch/arm/mach-omap2/prm-regbits-44xx.h @@ -35,6 +35,7 @@ #define OMAP4430_GLOBAL_WARM_SW_RST_SHIFT 1 #define OMAP4430_GLOBAL_WUEN_MASK (1 << 16) #define OMAP4430_HSMCODE_MASK (0x7 << 0) +#define OMAP4430_SRMODEEN_MASK (1 << 4) #define OMAP4430_HSMODEEN_MASK (1 << 3) #define OMAP4430_HSSCLL_SHIFT 24 #define OMAP4430_ICEPICK_RST_SHIFT 9 |