soc/tegra: pmc: Populate powergate debugfs only when needed

The 'powergate' debugfs node is used to show the state of the powergates
but for some devices the 'num_powergates' is 0 and so it displays
nothing. Therefore, only populate this debugfs entry for devices where
num_powergates is greater than 0.

Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>

diff --git a/drivers/soc/tegra/pmc.c b/drivers/soc/tegra/pmc.c
index da60e7e5927df110cbb1e4e52ef998f92eda091b..d4edf701a40f1bd941c38f3fce508eb1b3bda6cb 100644 (file)
--- a/drivers/soc/tegra/pmc.c
+++ b/drivers/soc/tegra/pmc.c
@@ -3160,7 +3160,8 @@ static int tegra_pmc_probe(struct platform_device *pdev)
        if (pmc->soc->set_wake_filters)
                pmc->soc->set_wake_filters(pmc);
 
-       debugfs_create_file("powergate", 0444, NULL, pmc, &powergate_fops);
+       if (pmc->soc->num_powergates)
+               debugfs_create_file("powergate", 0444, NULL, pmc, &powergate_fops);
 
        return 0;