在 2018/10/23 14:26, Lee Jones 写道:
The rk809 and rk817 are a Power Management IC (PMIC) for multimedia
and handheld devices. It contains the following components:
- Regulators
- RTC
- Clocking
Both RK809 and RK817 chips are using a similar register map,
so we can reuse the RTC and Clocking and regulators functionality.
Signed-off-by: Tony Xie <tony.xie@xxxxxxxxxxxxxx>
---
drivers/mfd/Kconfig | 6 +-
drivers/mfd/rk808.c | 218 +++++++++++++++++++++++++++++++++++++++++++++-
include/linux/mfd/rk808.h | 172 ++++++++++++++++++++++++++++++++++++
kernel/reboot.c | 1 +
4 files changed, 391 insertions(+), 6 deletions(-)
[...]
diff --git a/kernel/reboot.c b/kernel/reboot.c
index e4ced88..83810d7 100644
--- a/kernel/reboot.c
+++ b/kernel/reboot.c
@@ -49,6 +49,7 @@
*/
void (*pm_power_off_prepare)(void);
+EXPORT_SYMBOL_GPL(pm_power_off_prepare);
Why do you need this where no other driver in the kernel does?
There is a gpio_slp pin for RK809 and RK817，this pin has reset、power
down and sleep functions，so
when system is going to power down, this pin is needed to switch to
power down function，and then we just only control
this pin to high to power down the system in atf at last。
There are other PM call-backs that you can use for this. There
shouldn't be any requirement to export and call functions at this
level directly.
I will use a shutdown call-backs from syscore to implement it.
