shinys000114/linux
1
0
Fork 0
mirror of https://github.com/hardkernel/linux.git synced 2026-06-08 20:07:46 +09:00
Code Issues Packages Projects Releases Wiki Activity

rk30:sdk:Support wm8326 adc for low battery detection

Browse Source
This commit is contained in:
张晴
2012-05-03 13:50:32 +08:00
parent 1f21e7a58a
commit 035e3ba750
3 changed files with 59 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

26
arch/arm/mach-rk30/board-rk30-sdk-wm8326.c
View File

@@ -140,6 +140,27 @@ static int wm831x_mask_interrupt(struct wm831x *Wm831x)
/*****************************************************************/
}
#ifdef CONFIG_WM8326_VBAT_LOW_DETECTION
static int wm831x_low_power_detection(struct wm831x *wm831x)
{
wm831x_reg_write(wm831x,WM831X_AUXADC_CONTROL,0x803f); //open adc
wm831x_reg_write(wm831x,WM831X_AUXADC_CONTROL,0xd03f);
wm831x_reg_write(wm831x,WM831X_AUXADC_SOURCE,0x0001);
wm831x_reg_write(wm831x,WM831X_COMPARATOR_CONTROL,0x0001);
wm831x_reg_write(wm831x,WM831X_COMPARATOR_1,0x2910); //set the low power is 3.4v
wm831x_reg_write(wm831x,WM831X_INTERRUPT_STATUS_1_MASK,0x99ee);
wm831x_set_bits(wm831x,WM831X_SYSTEM_INTERRUPTS_MASK,0x0100,0x0000);
if (wm831x_reg_read(wm831x,WM831X_AUXADC_DATA)< 0x1900){
printk("The vbat is too low.\n");
wm831x_device_shutdown(wm831x);
}
return 0;
}
#endif
int wm831x_post_init(struct wm831x *Wm831x)
{
struct regulator *dcdc;
@@ -258,6 +279,11 @@ int wm831x_post_init(struct wm831x *Wm831x)
udelay(100);
wm831x_mask_interrupt(Wm831x);
#ifdef CONFIG_WM8326_VBAT_LOW_DETECTION
wm831x_low_power_detection(Wm831x);
#endif
printk("wm831x_post_init end");
return 0;
}

29
drivers/mfd/wm831x-core.c
View File

@@ -28,6 +28,8 @@
#include <linux/mfd/wm831x/regulator.h>
#include <linux/mfd/wm831x/pmu.h>
#include <mach/board.h>
/* Current settings - values are 2*2^(reg_val/4) microamps. These are
* exported since they are used by multiple drivers.
@@ -421,6 +423,15 @@ out:
}
EXPORT_SYMBOL_GPL(wm831x_auxadc_read);
#ifdef CONFIG_WM8326_VBAT_LOW_DETECTION
static irqreturn_t wm831x_vbatlo_irq(int irq, void *irq_data)
{
rk28_send_wakeup_key();
return IRQ_HANDLED;
}
#endif
static irqreturn_t wm831x_auxadc_irq(int irq, void *irq_data)
{
struct wm831x *wm831x = irq_data;
@@ -1617,14 +1628,32 @@ int wm831x_device_init(struct wm831x *wm831x, unsigned long id, int irq)
if (ret != 0)
goto err;
switch (parent) {
#ifdef CONFIG_WM8326_VBAT_LOW_DETECTION
case WM8326:
if (wm831x->irq_base) {
ret = request_threaded_irq(wm831x->irq_base +
WM831X_IRQ_AUXADC_DCOMP1,
NULL, wm831x_vbatlo_irq, IRQF_TRIGGER_RISING,
"dcomp1", wm831x);
}
if (ret < 0)
dev_err(wm831x->dev, "dcomp1 IRQ request failed: %d\n",
ret);
break;
#endif
default:
if (wm831x->irq_base) {
ret = request_threaded_irq(wm831x->irq_base +
WM831X_IRQ_AUXADC_DATA,
NULL, wm831x_auxadc_irq, 0,
"auxadc", wm831x);
}
if (ret < 0)
dev_err(wm831x->dev, "AUXADC IRQ request failed: %d\n",
ret);
}
/* The core device is up, instantiate the subdevices. */

4
drivers/power/Kconfig
View File

@@ -325,4 +325,8 @@ config BATTERY_RK30_VOL3V8
config POWER_ON_CHARGER_DISPLAY
bool "Support charger display"
config WM8326_VBAT_LOW_DETECTION
tristate "Support for WM8326 battery voltage detection."
default n
endif # POWER_SUPPLY