diff options
| author | Masahisa Kojima <masahisa.kojima@linaro.org> | 2018-02-27 12:06:17 +0000 |
|---|---|---|
| committer | Ard Biesheuvel <ard.biesheuvel@linaro.org> | 2018-02-27 12:08:42 +0000 |
| commit | 7d0afe144a4ac35f321dddace37a5bdc11d80453 (patch) | |
| tree | 5c0446e7ba5b1d8fec6d9f326c471fa0d4eb70c8 | |
| parent | cd3de9253d90f5ab6eed046fb7bb9f4e9f87ae5a (diff) | |
synquacer: add more delay in GPIO poweroff sequence
To ensure that the MCU can observe a high to low transition followed by
a low to high transition, force the GPIO high when configuring it as
output, and add another delay to keep it in that state for ~1 ms.
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
| -rw-r--r-- | plat/arm/css/common/css_pm.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/plat/arm/css/common/css_pm.c b/plat/arm/css/common/css_pm.c index 6abac246..6893e914 100644 --- a/plat/arm/css/common/css_pm.c +++ b/plat/arm/css/common/css_pm.c @@ -239,6 +239,12 @@ void __dead2 css_system_off(void) /* set PD[9] high to power off the system */ gpio[5] |= 0x2; /* set output */ + gpio[1] |= 0x2; /* set high */ + dmbst(); + + for (i = 0; i < 1000000; i++) + __asm__("nop"); + gpio[1] &= ~0x2; /* set low */ dmbst(); |