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allwinner: implement system power down on H6 w/ AXP805 

The AXP805 PMIC used with H6 is capable of shutting down the system.

Add support for using it to shut down the system power.

The original placeholder power off code is moved to A64 code, as it's
still TODO to implement PMIC operations for A64.

Signed-off-by: Icenowy Zheng <icenowy@aosc.io>
This commit is contained in:
Icenowy Zheng 2018-07-22 21:52:50 +08:00
parent 6d37282807
commit 5069c1cfef
4 changed files with 33 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
plat/allwinner/common/sunxi_pm.c
View File

@ -54,9 +54,7 @@ static void __dead2 sunxi_system_off(void)
/* Turn off all secondary CPUs */
sunxi_disable_secondary_cpus(plat_my_core_pos());
ERROR("PSCI: Full shutdown not implemented, halting\n");
wfi();
panic();
sunxi_power_down();
}
static void __dead2 sunxi_system_reset(void)

2
plat/allwinner/common/sunxi_private.h
View File

@ -17,4 +17,6 @@ uint16_t sunxi_read_soc_id(void);
void sunxi_pmic_setup(void);
void sunxi_security_setup(void);
void __dead2 sunxi_power_down(void);
#endif /* __SUNXI_PRIVATE_H__ */

8
plat/allwinner/sun50i_a64/sunxi_power.c
View File

@ -5,6 +5,7 @@
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <arch_helpers.h>
#include <debug.h>
int sunxi_pmic_setup(void)
@ -14,3 +15,10 @@ int sunxi_pmic_setup(void)
return 0;
}
void __dead2 sunxi_power_down(void)
{
ERROR("PSCI: Full shutdown not implemented, halting\n");
wfi();
panic();
}

22
plat/allwinner/sun50i_h6/sunxi_power.c
View File

@ -5,6 +5,7 @@
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <arch_helpers.h>
#include <debug.h>
#include <delay_timer.h>
#include <errno.h>
@ -119,3 +120,24 @@ int sunxi_pmic_setup(void)
return 0;
}
void __dead2 sunxi_power_down(void)
{
uint8_t val;
switch (pmic) {
case AXP805:
val = 0x26; /* Default value for REG 32H */
axp_i2c_read(AXP805_ADDR, 0x32, &val);
val |= 0x80;
axp_i2c_write(AXP805_ADDR, 0x32, val);
break;
default:
break;
}
udelay(1000);
ERROR("PSCI: Cannot communicate with PMIC, halting\n");
wfi();
panic();
}