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authorTony Lindgren <tony@atomide.com>2014-05-14 03:34:09 +0200
committerLee Jones <lee.jones@linaro.org>2014-05-28 09:06:18 +0200
commit43fef47f94a1ae46fb2720dada32fa3b5547bee2 (patch)
treef01e73e8aed5a4fb21a6a46314a6a105fb614627 /drivers/mfd
parentmfd: twl4030-power: Add support for board specific configuration (diff)
downloadlinux-43fef47f94a1ae46fb2720dada32fa3b5547bee2.tar.xz
linux-43fef47f94a1ae46fb2720dada32fa3b5547bee2.zip
mfd: twl4030-power: Add a configuration to turn off oscillator during off-idle
Some oscillators can be turned off during off-idle saving few a little bit power at the cost of the oscillator start up latency. If you board can do this, you can now enable it by using the ti,twl4030-power-idle-osc-off compatible flag. Signed-off-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Lee Jones <lee.jones@linaro.org>
Diffstat (limited to 'drivers/mfd')
-rw-r--r--drivers/mfd/twl4030-power.c17
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/mfd/twl4030-power.c b/drivers/mfd/twl4030-power.c
index 4846c7b48ebb..3bc969a5916b 100644
--- a/drivers/mfd/twl4030-power.c
+++ b/drivers/mfd/twl4030-power.c
@@ -761,6 +761,19 @@ static struct twl4030_power_data omap3_idle = {
.resource_config = omap3_idle_rconfig,
};
+/* Disable 32 KiHz oscillator during idle */
+static struct twl4030_resconfig osc_off_rconfig[] = {
+ TWL_REMAP_OFF(RES_CLKEN, DEV_GRP_P1 | DEV_GRP_P3, 3, 2),
+ { /* Terminator */ },
+};
+
+static struct twl4030_power_data osc_off_idle = {
+ .scripts = omap3_idle_scripts,
+ .num = ARRAY_SIZE(omap3_idle_scripts),
+ .resource_config = omap3_idle_rconfig,
+ .board_config = osc_off_rconfig,
+};
+
static struct of_device_id twl4030_power_of_match[] = {
{
.compatible = "ti,twl4030-power-reset",
@@ -770,6 +783,10 @@ static struct of_device_id twl4030_power_of_match[] = {
.compatible = "ti,twl4030-power-idle",
.data = &omap3_idle,
},
+ {
+ .compatible = "ti,twl4030-power-idle-osc-off",
+ .data = &osc_off_idle,
+ },
{ },
};
MODULE_DEVICE_TABLE(of, twl4030_power_of_match);