LS1046A watchdog force pull high/low in u-boot

charleshuang — Tue, 11 Jan 2022 08:37:31 GMT

Hi NXP Team.

We want to force pull-high or pull-low the Enable/Trigger pins in U-Boot.

So we add some code as below, but it look like no use.

Do you have any suggestion for us ?

Enable pin => GPIO2_2

Trigger pin => GPIO2_3

*** u-boot/board/freescale/ls1046ardb/ls1046ardb.c ***

#define WDT_DIRMASK_TRIG 0xefffffff
#define WDT_DATMASK_TRIG 0x10000000
#define WDT_DIRMASK_EN 0xdfffffff
#define WDT_DATMASK_EN 0xdfffffff

static inline void wdt_pinmux_init(void)
{
u32 val;
struct ccsr_gpio *pgpio = (void *)(GPIO2_BASE_ADDR);

/* en pin */
val = in_be32(&pgpio->gpdir);
val &= WDT_DIRMASK_EN;
out_be32(&pgpio->gpdir, val);

printf("WDT_DIRMASK_EN val (0x%X)\n", val);

val = in_be32(&pgpio->gpdat);
val &= WDT_DATMASK_EN;
out_be32(&pgpio->gpdat, val);

printf("WDT_DATMASK_EN val (0x%X)\n", val);

/* trig pin */
val = in_be32(&pgpio->gpdir);
val &= WDT_DIRMASK_TRIG;
out_be32(&pgpio->gpdir, val);

printf("WDT_DIRMASK_TRIG val (0x%X)\n", val);

val = in_be32(&pgpio->gpdat);
val |= WDT_DATMASK_TRIG;
out_be32(&pgpio->gpdat, val);

printf("WDT_DATMASK_TRIG val (0x%X)\n", val);
}

void config_board_mux(void)
{

.....

/* adv-wdt mux init */
wdt_pinmux_init();
}

Re: LS1046A watchdog force pull high/low in u-boot

Pavel — Fri, 14 Jan 2022 05:33:20 GMT

Are these pins assigned to GPIO in the LS1046a RCW?

See the Section 3.4.6 in the LS1046a Reference Manual:

charleshuang — Tue, 18 Jan 2022 02:11:51 GMT

Yes, GPIO2_2/GPIO2_3 pins is already set in RCW.