diff options
| author |   Ilkka Koskinen <ilkka.koskinen@nokia.com> | 2009-10-22 14:14:09 +0300 |
|---|---|---|
| committer |   Samuel Ortiz <sameo@linux.intel.com> | 2009-12-13 19:21:33 +0100 |
| commit | 38a684963f619eb9117cb898b92bde92cdd09127 (patch) | |
| tree | 11165f43948f3406110e5135c0479b244cc662fd /drivers/mfd | |
| parent | mfd: Allow platforms to specify an IRQ base for WM8350 (diff) | |
| download | linux-dev-38a684963f619eb9117cb898b92bde92cdd09127.tar.xz linux-dev-38a684963f619eb9117cb898b92bde92cdd09127.zip | |
mfd: Enable twl4030 32kHz oscillator low-power mode
Allows TWL's 32kHz oscillator to go in low-power mode when
main battery voltage is running low.
Signed-off-by: Ilkka Koskinen <ilkka.koskinen@nokia.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Diffstat (limited to 'drivers/mfd')
| -rw-r--r-- | drivers/mfd/twl4030-core.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/drivers/mfd/twl4030-core.c b/drivers/mfd/twl4030-core.c index e3abbf66cc5c..90a38e43c313 100644 --- a/drivers/mfd/twl4030-core.c +++ b/drivers/mfd/twl4030-core.c @@ -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) |