[PATCH] soc/tegra: Add PM dependency to SOC_TEGRA_PMC Kconfig

[PATCH] soc/tegra: Add PM dependency to SOC_TEGRA_PMC Kconfig

[Sasha Levin]

kconfiglint reports:

  K006: config SOC_TEGRA_PMC selects PM_GENERIC_DOMAINS which depends on PM,
        but SOC_TEGRA_PMC does not depend on PM

SOC_TEGRA_PMC is an internal bool symbol (no prompt) that is selected by
ARCH_TEGRA_*_SOC options to enable the Power Management Controller driver.
It was originally introduced in commit 5e7d4c652941 ("soc/tegra: Implement
Tegra186 PMC support") as a bare `bool` with no
selects of its own.

Over time, additional selects were added:
- Commit 5098e2b95e8e ("soc/tegra: pmc: Select GENERIC_PINCONF") added
  select GENERIC_PINCONF
- Commit 28dbe8231066 ("soc/tegra: pmc: Select IRQ_DOMAIN_HIERARCHY") added
  select IRQ_DOMAIN_HIERARCHY
- Commit f880ee9e9688 ("soc/tegra: pmc: Add core power domain") added select PM_OPP and select PM_GENERIC_DOMAINS to
  support core power domain voltage scaling

PM_GENERIC_DOMAINS is defined in kernel/power/Kconfig as:

  config PM_GENERIC_DOMAINS
      bool
      depends on PM

When commit f880ee9e9688 ("soc/tegra: pmc: Add core power domain") added
the select, it did not add a corresponding `depends on PM` to
SOC_TEGRA_PMC. This was not a functional problem because all callers of
SOC_TEGRA_PMC are inside `if ARCH_TEGRA` blocks, and both the ARM32
definition (arch/arm/mach-tegra/Kconfig) and the ARM64 definition
(arch/arm64/Kconfig.platforms) of ARCH_TEGRA select PM. Thus PM is always
enabled when SOC_TEGRA_PMC is selected in practice.

However, the dependency chain is implicit rather than explicit. Add
`depends on PM` to SOC_TEGRA_PMC to make the requirement explicit and
prevent a theoretical misconfiguration if SOC_TEGRA_PMC were ever selected
outside the ARCH_TEGRA context.

Assisted-by: Claude:claude-opus-4-6 kconfiglint
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/soc/tegra/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/soc/tegra/Kconfig b/drivers/soc/tegra/Kconfig
index 073346c1542ba..8b6fdb9ad1ea3 100644
--- a/drivers/soc/tegra/Kconfig
+++ b/drivers/soc/tegra/Kconfig
@@ -171,6 +171,7 @@ config SOC_TEGRA_FLOWCTRL
 
 config SOC_TEGRA_PMC
 	bool
+	depends on PM
 	select GENERIC_PINCONF
 	select IRQ_DOMAIN_HIERARCHY
 	select PM_OPP
-- 
2.53.0