diff options
| author | Masahisa KOJIMA <kojima.masahisa@socionext.com> | 2018-02-28 17:04:51 +0900 |
|---|---|---|
| committer | Ard Biesheuvel <ard.biesheuvel@linaro.org> | 2018-02-28 08:36:27 +0000 |
| commit | 3a5604ade17a8f921d36dff440ab3961490deac9 (patch) | |
| tree | a960687870428cb5b3b62aed54d210c8e46d9b60 | |
| parent | 7d0afe144a4ac35f321dddace37a5bdc11d80453 (diff) | |
synquacer: add multiple GPIO poweroff sequence
In some hardware problem, GPIO low output is not effective.
This issue rarely happen.
As a software workaround, continuouslly perform GPIO poweroff sequence
until poweroff succeeds.
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
| -rw-r--r-- | plat/arm/css/common/css_pm.c | 19 |
1 files changed, 12 insertions, 7 deletions
diff --git a/plat/arm/css/common/css_pm.c b/plat/arm/css/common/css_pm.c index 6893e914..2c6db590 100644 --- a/plat/arm/css/common/css_pm.c +++ b/plat/arm/css/common/css_pm.c @@ -234,7 +234,7 @@ void css_pwr_domain_suspend_finish( ******************************************************************************/ void __dead2 css_system_off(void) { - uint32_t *gpio = (uint32_t *)0x51000000; + volatile uint32_t *gpio = (uint32_t *)0x51000000; uint32_t i; /* set PD[9] high to power off the system */ @@ -245,14 +245,19 @@ void __dead2 css_system_off(void) for (i = 0; i < 1000000; i++) __asm__("nop"); - gpio[1] &= ~0x2; /* set low */ - dmbst(); + while (1) { + gpio[1] &= ~0x2; /* set low */ + dmbst(); - for (i = 0; i < 1000000; i++) - __asm__("nop"); + for (i = 0; i < 1000000; i++) + __asm__("nop"); - gpio[1] |= 0x2; /* set high */ - dmbst(); + gpio[1] |= 0x2; /* set high */ + dmbst(); + + for (i = 0; i < 100000000; i++) + __asm__("nop"); + } wfi(); ERROR("CSS System Off: operation not handled.\n"); |