[ARM] tegra: stingray: Fix CPU DVFS

P0 and later models were changed to put the cpu_vdd regulator
in MODE 1, rather than the previous MODE 3 value. This caused
DVFS to appear to work but actually have no impact on the
cpu voltage.

In addition, when resuming from LP0, the CPU voltage must be
1.0v.  To guarantee this, the voltage needs to be set upon
entering suspend, so when the regulator is re-enabled, it is
the correct voltage before code begins executing.

Change-Id: I3580c832dbb4b5ce9ce7bd0089352a72b3b3869c
Signed-off-by: Greg Meiste <w30289@motorola.com>

diff --git a/arch/arm/mach-tegra/board-stingray-power.c b/arch/arm/mach-tegra/board-stingray-power.c
index 3f97f7435a79c33d3e222046bd2672656fe6755f..9ba3518b87ad78dae4ea2c2ad15f600e5da15efa 100644 (file)
--- a/arch/arm/mach-tegra/board-stingray-power.c
+++ b/arch/arm/mach-tegra/board-stingray-power.c
@@ -660,6 +660,11 @@ struct regulator_init_data max8649_regulator_init_data[] = {
                        .max_uV                 = 1100000,
                        .valid_ops_mask         = REGULATOR_CHANGE_VOLTAGE,
                        .always_on              = 1,
+                       .state_mem = {
+                                .uV            = 1000000,
+                                .enabled       = 1,
+                                .disabled      = 0,
+                       }
                },
                .num_consumer_supplies  = ARRAY_SIZE(max8649_consumers),
                .consumer_supplies      = max8649_consumers,
@@ -668,7 +673,7 @@ struct regulator_init_data max8649_regulator_init_data[] = {
 
 struct max8649_platform_data stingray_max8649_pdata = {
        .regulator = max8649_regulator_init_data,
-       .mode = 3,
+       .mode = 1,
        .extclk = 0,
        .ramp_timing = MAX8649_RAMP_32MV,
        .ramp_down = 0,
@@ -727,6 +732,8 @@ int __init stingray_power_init(void)
                stingray_display_led.led_regulator = "sw5";
                stingray_display_led.cpcap_register = CPCAP_REG_KLC,
                stingray_privacy_led.led_regulator = "sw5";
+
+               stingray_max8649_pdata.mode = 3;
        }
 
        tegra_gpio_enable(TEGRA_GPIO_PT2);