提交 38a68496 编写于 作者: I Ilkka Koskinen 提交者: Samuel Ortiz

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: NIlkka Koskinen <ilkka.koskinen@nokia.com>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>
上级 75b75722
......@@ -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)
......
......@@ -313,6 +313,10 @@ int twl4030_i2c_read(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes);
/*----------------------------------------------------------------------*/
struct twl4030_clock_init_data {
bool ck32k_lowpwr_enable;
};
struct twl4030_bci_platform_data {
int *battery_tmp_tbl;
unsigned int tblsize;
......@@ -425,6 +429,7 @@ struct twl4030_codec_data {
struct twl4030_platform_data {
unsigned irq_base, irq_end;
struct twl4030_clock_init_data *clock;
struct twl4030_bci_platform_data *bci;
struct twl4030_gpio_platform_data *gpio;
struct twl4030_madc_platform_data *madc;
......
Markdown is supported
0% .
You are about to add 0 people to the discussion. Proceed with caution.
先完成此消息的编辑!
想要评论请 注册