soc/tegra: pmc: restrict compilation of suspend-related support to ARM

Tegra SoCs with 64-bit ARM support don't currently support deep CPU
low-power states in mainline Linux.  When this support is added in the
future, it will probably look rather different from the existing
32-bit ARM support, since the ARM64 maintainers' strong preference is
to use PSCI to implement it.

So, for the time being, prevent the CPU suspend-related code and data
in the Tegra PMC driver from compiling on ARM64.

Signed-off-by: Paul Walmsley <paul@pwsan.com>
Signed-off-by: Paul Walmsley <pwalmsley@nvidia.com>
Cc: Thierry Reding <treding@nvidia.com>
Cc: Allen Martin <amartin@nvidia.com>
Cc: Stephen Warren <swarren@nvidia.com>
Cc: Alexandre Courbot <gnurou@gmail.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>

1 files changed, 5 insertions, 2 deletions

diff --git a/drivers/soc/tegra/pmc.c b/drivers/soc/tegra/pmc.c
index a2c0ceb95f8f..4bdc654bd747 100644
--- a/drivers/soc/tegra/pmc.c
+++ b/drivers/soc/tegra/pmc.c
@@ -739,7 +739,7 @@ static int tegra_pmc_probe(struct platform_device *pdev)
         return 0;
 }
 
-#ifdef CONFIG_PM_SLEEP
+#if defined(CONFIG_PM_SLEEP) && defined(CONFIG_ARM)
 static int tegra_pmc_suspend(struct device *dev)
 {
         tegra_pmc_writel(virt_to_phys(tegra_resume), PMC_SCRATCH41);
@@ -753,10 +753,11 @@ static int tegra_pmc_resume(struct device *dev)
 
         return 0;
 }
-#endif
 
 static SIMPLE_DEV_PM_OPS(tegra_pmc_pm_ops, tegra_pmc_suspend, tegra_pmc_resume);
 
+#endif
+
 static const char * const tegra20_powergates[] = {
         [TEGRA_POWERGATE_CPU] = "cpu",
         [TEGRA_POWERGATE_3D] = "3d",
@@ -894,7 +895,9 @@ static struct platform_driver tegra_pmc_driver = {
                 .name = "tegra-pmc",
                 .suppress_bind_attrs = true,
                 .of_match_table = tegra_pmc_match,
+#if defined(CONFIG_PM_SLEEP) && defined(CONFIG_ARM)
                 .pm = &tegra_pmc_pm_ops,
+#endif
         },
         .probe = tegra_pmc_probe,
 };