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fw/abb/twl3025: Add function to query PWON state 

This allows us to detect power button presses on the Pirelli
DP-L10 and the Huawei GTM900-B module. Polling will only be
activated once the power button has been pressed and we received
the interrupt. The goal is to reduce the required amount of
TWL3025 register accesses to a minimum.

Change-Id: I31be61c8089173aed616abd1ede6c4cf5c9b6770
This commit is contained in:
Steve Markgraf 2019-08-11 02:10:24 +02:00
parent a1de51d357
commit da7cd7408a
2 changed files with 30 additions and 0 deletions
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28
src/target/firmware/abb/twl3025.c
View File

@ -60,8 +60,15 @@ const uint16_t twl3025_default_ramp[16] = {
ABB_RAMP_VAL( 0, 0),
};
typedef enum pwon_state {
PWON_IDLE,
PWON_DETECTED,
PWON_REPORTED,
} pwon_state_t;
struct twl3025 {
uint8_t page;
pwon_state_t pwon;
};
static struct twl3025 twl3025_state;
@ -106,6 +113,8 @@ static void twl3025_irq(enum irq_nr nr)
case IRQ_EXTERNAL: // charger in/out, pwrbtn, adc done
src = twl3025_reg_read(ITSTATREG);
// printd("itstatreg 0x%02x\n", src);
if ((src & 0x04) && twl3025_state.pwon == PWON_IDLE)
twl3025_state.pwon = PWON_DETECTED;
if (src & 0x08)
handle_charger();
if (src & 0x20)
@ -127,6 +136,7 @@ void twl3025_init(void)
twl3025_clk13m(1);
twl3025_reg_write(AFCCTLADD, 0x01); /* AFCCK(1:0) must not be zero! */
twl3025_unit_enable(TWL3025_UNIT_AFC, 1);
twl3025_state.pwon = PWON_IDLE;
irq_register_handler(IRQ_EXTERNAL, &twl3025_irq);
irq_config(IRQ_EXTERNAL, 0, 0, 0);
@ -185,6 +195,24 @@ static void twl3025_wait_ibic_access(void)
delay_ms(1);
}
int twl3025_get_pwon(void)
{
switch (twl3025_state.pwon) {
case PWON_DETECTED:
twl3025_state.pwon = PWON_REPORTED;
break;
case PWON_REPORTED:
if (twl3025_reg_read(VRPCSTS) & 0x10)
twl3025_state.pwon = PWON_IDLE;
break;
case PWON_IDLE:
default:
break;
}
return (twl3025_state.pwon != PWON_IDLE);
}
void twl3025_power_off(void)
{
unsigned long flags;

2
src/target/firmware/include/abb/twl3025.h
View File

@ -144,6 +144,8 @@ void twl3025_init(void);
void twl3025_reg_write(uint8_t reg, uint16_t data);
uint16_t twl3025_reg_read(uint8_t reg);
int twl3025_get_pwon(void);
void twl3025_power_off(void);
void twl3025_clk13m(int enable);