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imx8: power: Add PD device lookup interface to power domain uclass

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Add power_domain_lookup_name interface to power domain uclass to find
a power domain device by its DTB node name, not using its associated
client device.

Through this interface, we can operate the power domain devices directly.
This is needed for non-DM drivers.

Modified from Ye's NXP downstream patch

only for legacy imx8 power domain driver, since we have not migrated
to use new power domain driver.

Signed-off-by: Ye Li <ye.li@nxp.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
This commit is contained in:
Peng Fan 2020-05-04 21:16:50 +08:00 • committed by Stefano Babic
parent e6405713d8
commit 8c0a1c6de8
2 changed files with 35 additions and 0 deletions
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7
arch/arm/include/asm/arch-imx8/sys_proto.h
View file

@ -5,6 +5,11 @@
#include <asm/arch/sci/sci.h>
#include <asm/mach-imx/sys_proto.h>
#include <asm/arch/power-domain.h>
#include <dm/platdata.h>
#include <dm/device-internal.h>
#include <dm/device.h>
#include <power-domain.h>
#include <linux/types.h>
struct pass_over_info_t {
@ -21,3 +26,5 @@ void build_info(void);
enum boot_device get_boot_device(void);
int print_bootinfo(void);
int sc_pm_setup_uart(sc_rsrc_t uart_rsrc, sc_pm_clock_rate_t clk_rate);
int imx8_power_domain_lookup_name(const char *name,
struct power_domain *power_domain);

28
drivers/power/domain/imx8-power-domain-legacy.c
View file

@ -19,6 +19,34 @@ struct imx8_power_domain_priv {
bool state_on;
};
int imx8_power_domain_lookup_name(const char *name,
struct power_domain *power_domain)
{
struct udevice *dev;
struct power_domain_ops *ops;
int ret;
debug("%s(power_domain=%p name=%s)\n", __func__, power_domain, name);
ret = uclass_get_device_by_name(UCLASS_POWER_DOMAIN, name, &dev);
if (ret) {
printf("%s fail: %s, ret = %d\n", __func__, name, ret);
return ret;
}
ops = (struct power_domain_ops *)dev->driver->ops;
power_domain->dev = dev;
ret = ops->request(power_domain);
if (ret) {
debug("ops->request() failed: %d\n", ret);
return ret;
}
debug("%s ok: %s\n", __func__, dev->name);
return 0;
}
static int imx8_power_domain_request(struct power_domain *power_domain)
{
debug("%s(power_domain=%p)\n", __func__, power_domain);