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>
diff --git a/drivers/mfd/twl4030-core.c b/drivers/mfd/twl4030-core.c
index e3abbf6..90a38e4 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 @@
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 @@
}
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 @@
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)