A-Team_Digital_Solutions/android_kernel_motorola_sm6375
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mfd: Enable twl4030 32kHz oscillator low-power mode

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Allows TWL's 32kHz oscillator to go in low-power mode when
main battery voltage is running low.

Signed-off-by: Ilkka Koskinen <[email protected]>
Signed-off-by: Samuel Ortiz <[email protected]>
This commit is contained in:
Ilkka Koskinen 2009-10-22 14:14:09 +03:00 • committed by Samuel Ortiz
commit 38a684963f
2 changed files with 12 additions and 2 deletions
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9
drivers/mfd/twl4030-core.c
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@ -183,6 +183,7 @@
#define HFCLK_FREQ_26_MHZ (2 << 0)
#define HFCLK_FREQ_38p4_MHZ (3 << 0)
#define HIGH_PERF_SQ (1 << 3)
#define CK32K_LOWPWR_EN (1 << 7)
/* chip-specific feature flags, for i2c_device_id.driver_data */
@ -695,7 +696,8 @@ static inline int __init unprotect_pm_master(void)
return e;
}
static void clocks_init(struct device *dev)
static void clocks_init(struct device *dev,
struct twl4030_clock_init_data *clock)
{
int e = 0;
struct clk *osc;
@ -742,6 +744,9 @@ static void clocks_init(struct device *dev)
}
ctrl |= HIGH_PERF_SQ;
if (clock && clock->ck32k_lowpwr_enable)
ctrl |= CK32K_LOWPWR_EN;
e |= unprotect_pm_master();
/* effect->MADC+USB ck en */
e |= twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, ctrl, R_CFG_BOOT);
@ -820,7 +825,7 @@ twl4030_probe(struct i2c_client *client, const struct i2c_device_id *id)
inuse = true;
/* setup clock framework */
clocks_init(&client->dev);
clocks_init(&client->dev, pdata->clock);
/* load power event scripts */
if (twl_has_power() && pdata->power)