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board: freescale: p1_p2_rdb_pc: Delete watchdog max6370 node in load_default mode

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CPLD in load_default mode ignores watchdog reset signal. It does not reset
board when watchdog triggers reset signal.

Detect load_default mode by GPIO7 - LOAD_DEFAULT_N and delete watchdog
max6370 node from device to prevent registering driver for non-working
watchdog.

Signed-off-by: Pali Rohár <pali@kernel.org>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
This commit is contained in:
Pali Rohár
2022-08-01 15:35:43 +02:00
committed by Peng Fan
parent 61fed3155f
commit 645993bdd7
1 changed files with 28 additions and 0 deletions
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28
board/freescale/p1_p2_rdb_pc/p1_p2_rdb_pc.c
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@@ -414,6 +414,24 @@ int board_eth_init(struct bd_info *bis)
}
#endif
#if defined(CONFIG_OF_BOARD_SETUP) || defined(CONFIG_OF_BOARD_FIXUP)
static void fix_max6370_watchdog(void *blob)
{
int off = fdt_node_offset_by_compatible(blob, -1, "maxim,max6370");
ccsr_gpio_t *pgpio = (void *)(CONFIG_SYS_MPC85xx_GPIO_ADDR);
u32 gpioval = in_be32(&pgpio->gpdat);
/*
* Delete watchdog max6370 node in load_default mode (detected by
* GPIO7 - LOAD_DEFAULT_N) because CPLD in load_default mode ignores
* watchdog reset signal. CPLD in load_default mode does not reset
* board when watchdog triggers reset signal.
*/
if (!(gpioval & BIT(31-7)) && off >= 0)
fdt_del_node(blob, off);
}
#endif
#ifdef CONFIG_OF_BOARD_SETUP
int ft_board_setup(void *blob, struct bd_info *bd)
{
@@ -439,6 +457,8 @@ int ft_board_setup(void *blob, struct bd_info *bd)
sizeof("okay"), 0);
#endif
fix_max6370_watchdog(blob);
#if defined(CONFIG_HAS_FSL_DR_USB)
fsl_fdt_fixup_dr_usb(blob, bd);
#endif
@@ -490,3 +510,11 @@ int ft_board_setup(void *blob, struct bd_info *bd)
return 0;
}
#endif
#ifdef CONFIG_OF_BOARD_FIXUP
int board_fix_fdt(void *blob)
{
fix_max6370_watchdog(blob);
return 0;
}
#endif