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pmdomain: imx: scu-pd: allow building as a module

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Convert CONFIG_IMX_SCU_PD from bool to tristate to allow building as a
loadable module. This is needed on Android devices using the Generic
Kernel Image (GKI), where SoC-specific drivers must be built as modules
rather than built into the core kernel image.

For i.MX8Q devices running Android with a GKI kernel, the SCU power
domain driver must be loadable. Without tristate support, power domains
cannot be properly initialized, preventing these systems from
functioning under GKI.

Use subsys_initcall() so that when built-in the power domain provider
probes before its consumers (e.g. the SCU clock driver at
device_initcall level), fixing "failed to attached the power domain"
warnings at boot. When built as a module, subsys_initcall() is
equivalent to module_init(). No module_exit() is provided because the
SCU power domain provider is a system-level resource that cannot be
safely removed at runtime.

Add MODULE_DEVICE_TABLE() for OF-based module autoloading.

Signed-off-by: Zhipeng Wang <zhipeng.wang_1@nxp.com>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
Signed-off-by: Ulf Hansson <ulfh@kernel.org>
This commit is contained in:
Zhipeng Wang 2026-07-23 11:05:23 +09:00 committed by Ulf Hansson
parent fad41cdd09
commit daa5fba89c
2 changed files with 8 additions and 2 deletions
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2
drivers/pmdomain/imx/Kconfig
View File

@ -24,7 +24,7 @@ config IMX9_BLK_CTRL
default y
config IMX_SCU_PD
bool "IMX SCU Power Domain driver"
tristate "IMX SCU Power Domain driver"
depends on IMX_SCU
help
The System Controller Firmware (SCFW) based power domain driver.

8
drivers/pmdomain/imx/scu-pd.c
View File

@ -531,6 +531,7 @@ static const struct of_device_id imx_sc_pd_match[] = {
{ .compatible = "fsl,scu-pd", &imx8qxp_scu_pd},
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, imx_sc_pd_match);
static struct platform_driver imx_sc_pd_driver = {
.driver = {
@ -540,7 +541,12 @@ static struct platform_driver imx_sc_pd_driver = {
},
.probe = imx_sc_pd_probe,
};
builtin_platform_driver(imx_sc_pd_driver);
static int __init imx_sc_pd_driver_init(void)
{
return platform_driver_register(&imx_sc_pd_driver);
}
subsys_initcall(imx_sc_pd_driver_init);
MODULE_AUTHOR("Dong Aisheng <aisheng.dong@nxp.com>");
MODULE_DESCRIPTION("IMX SCU Power Domain driver");