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npcx7: Export entering PSL mode.

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Some boards (like nocturne) use PSL mode, but the deassertion of PSL_OUT
does not directly cut the EC's VCC1 rail.  Therefore, the board needs to
implement a board specific implementation of hibernate while also being
able to configure PSL mode.  This commit exports a function of entering
PSL mode which could be used in a board specific hibernate
implementation.

BUG=b:79713379
BRANCH=poppy
TEST=`make -j buildall`

Change-Id: I8debcae5e713b85c6d23ee3419416b6ae5d5dbf0
Signed-off-by: Aseda Aboagye <aaboagye@google.com>
Reviewed-on: https://chromium-review.googlesource.com/1067891
Commit-Ready: Aseda Aboagye <aaboagye@chromium.org>
Tested-by: Aseda Aboagye <aaboagye@chromium.org>
Reviewed-by: Furquan Shaikh <furquan@chromium.org>
This commit is contained in:
Aseda Aboagye
2018-05-21 13:48:39 -07:00
committed by chrome-bot
parent a2a1f66cb5
commit ad8a612321
2 changed files with 9 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
chip/npcx/system-npcx7.c
View File

@@ -32,8 +32,7 @@ void system_mpu_config(void)
#error "Do not enable CONFIG_HIBERNATE_PSL if npcx ec doesn't support PSL mode!"
#endif
/* Hibernate function implemented by PSL (Power Switch Logic) mode. */
void __keep __attribute__ ((noreturn)) __enter_hibernate_in_psl(void)
void system_enter_psl_mode(void)
{
/* Configure pins from GPIOs to PSL which rely on VSBY power rail. */
gpio_config_module(MODULE_PMU, 1);
@@ -49,7 +48,12 @@ void __keep __attribute__ ((noreturn)) __enter_hibernate_in_psl(void)
* setting bit 5 of PDOUT(8).
*/
SET_BIT(NPCX_PDOUT(GPIO_PORT_8), 5);
}
/* Hibernate function implemented by PSL (Power Switch Logic) mode. */
void __keep __attribute__ ((noreturn)) __enter_hibernate_in_psl(void)
{
system_enter_psl_mode();
/* Spin and wait for PSL cuts power; should never return */
while (1)
;

3
chip/npcx/system_chip.h
View File

@@ -67,6 +67,9 @@ extern unsigned int __flash_lplfw_end;
/* Configure PSL mode setting for the wake-up pins. */
int system_config_psl_mode(enum gpio_signal signal);
/* Configure PSL pins and enter PSL mode. */
void system_enter_psl_mode(void);
/* End address for hibernate utility; defined in linker script */
extern unsigned int __after_init_end;