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imx233: implement battery reading using power register (automatically updated & scaled by lradc delay)

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@30988 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Amaury Pouly 2011-11-14 21:45:25 +00:00
parent 4359b40cf1
commit 9e4299f6f0
2 changed files with 5 additions and 2 deletions
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2
firmware/target/arm/imx233/power-imx233.h
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@ -67,6 +67,8 @@
#define HW_POWER_STS__PSWITCH_BM (3 << 20) #define HW_POWER_STS__PSWITCH_BM (3 << 20)
#define HW_POWER_BATTMONITOR (*(volatile uint32_t *)(HW_POWER_BASE + 0xe0)) #define HW_POWER_BATTMONITOR (*(volatile uint32_t *)(HW_POWER_BASE + 0xe0))
#define HW_POWER_BATTMONITOR__BATT_VAL_BP 16
#define HW_POWER_BATTMONITOR__BATT_VAL_BM (0x3ff << 16)
#define HW_POWER_RESET (*(volatile uint32_t *)(HW_POWER_BASE + 0x100)) #define HW_POWER_RESET (*(volatile uint32_t *)(HW_POWER_BASE + 0x100))
#define HW_POWER_RESET__UNLOCK 0x3E770000 #define HW_POWER_RESET__UNLOCK 0x3E770000

5
firmware/target/arm/imx233/powermgmt-imx233.c
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@ -20,7 +20,7 @@
****************************************************************************/ ****************************************************************************/
#include "powermgmt.h" #include "powermgmt.h"
#include "adc-target.h" #include "power-imx233.h"
const unsigned short battery_level_dangerous[BATTERY_TYPES_COUNT] = const unsigned short battery_level_dangerous[BATTERY_TYPES_COUNT] =
{ {
@ -49,7 +49,8 @@ const unsigned short percent_to_volt_charge[11] =
/* Returns battery voltage from ADC [millivolts] */ /* Returns battery voltage from ADC [millivolts] */
unsigned int battery_adc_voltage(void) unsigned int battery_adc_voltage(void)
{ {
return 4100; /* battery value is in 8mV LSB */
return __XTRACT(HW_POWER_BATTMONITOR, BATT_VAL) * 8;
} }
void powermgmt_init_target(void) void powermgmt_init_target(void)