diff options
| author | Peng Fan <peng.fan@nxp.com> | 2020-05-05 20:28:40 +0800 |
|---|---|---|
| committer | Stefano Babic <sbabic@denx.de> | 2020-05-10 20:55:20 +0200 |
| commit | 231401de2eab8b8e503eb21afb6579ec24f872c6 (patch) | |
| tree | 34f496d11fca0c3d0faa25839a98ed43ca25d3ec /drivers | |
| parent | 8103767256dde5e0ca949790f0896268ae0832d3 (diff) | |
imx: imx8qm/imx8qxp: Power down the resources before SPL jump to u-boot
Make sure that all devices that are powered up by SPL are powered down
before entering into the u-boot. Otherwise the subsystem/device will
never be powered down by SCFW, due to SPL and u-boot are in different
partitions.
Benefiting from power domain driver, this patch implements the function
"imx8_power_off_pd_devices" to power off all active devices.
Signed-off-by: Peng Fan <peng.fan@nxp.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/power/domain/imx8-power-domain-legacy.c | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/drivers/power/domain/imx8-power-domain-legacy.c b/drivers/power/domain/imx8-power-domain-legacy.c index f679df9e5d..7ba4056e2d 100644 --- a/drivers/power/domain/imx8-power-domain-legacy.c +++ b/drivers/power/domain/imx8-power-domain-legacy.c @@ -11,6 +11,7 @@ #include <asm/arch/power-domain.h> #include <dm/device-internal.h> #include <dm/device.h> +#include <dm/uclass-internal.h> #include <asm/arch/sci/sci.h> DECLARE_GLOBAL_DATA_PTR; @@ -19,6 +20,40 @@ struct imx8_power_domain_priv { bool state_on; }; +static bool check_device_power_off(struct udevice *dev, + const char *permanent_on_devices[], + int size) +{ + int i; + + for (i = 0; i < size; i++) { + if (!strcmp(dev->name, permanent_on_devices[i])) + return false; + } + + return true; +} + +void imx8_power_off_pd_devices(const char *permanent_on_devices[], int size) +{ + struct udevice *dev; + struct power_domain pd; + + for (uclass_find_first_device(UCLASS_POWER_DOMAIN, &dev); dev; + uclass_find_next_device(&dev)) { + if (!device_active(dev)) + continue; + /* + * Power off active pd devices except the permanent + * power on devices + */ + if (check_device_power_off(dev, permanent_on_devices, size)) { + pd.dev = dev; + power_domain_off(&pd); + } + } +} + int imx8_power_domain_lookup_name(const char *name, struct power_domain *power_domain) { |