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authorThierry Reding <treding@nvidia.com>2019-12-22 15:10:29 +0100
committerThierry Reding <treding@nvidia.com>2020-01-09 19:12:55 +0100
commit177602b006414b02152d3ef670746beb2bfde9cd (patch)
treeea88eff982bb4510aa7ef9335c19ea3ebceaf02d /drivers/memory
parent6d3ba7616347d3787f361bd7f2fcf8f01bf52c2a (diff)
downloadlinux-177602b006414b02152d3ef670746beb2bfde9cd.tar.bz2
memory: tegra: Add system sleep support
Add system suspend/resume support for the memory controller found on Tegra186 and later. This is required so that the SID registers can be reprogrammed after their content was lost during system sleep. Signed-off-by: Thierry Reding <treding@nvidia.com>
Diffstat (limited to 'drivers/memory')
-rw-r--r--drivers/memory/tegra/tegra186.c19
1 files changed, 19 insertions, 0 deletions
diff --git a/drivers/memory/tegra/tegra186.c b/drivers/memory/tegra/tegra186.c
index 57895116c8e5..77a313f1bf0e 100644
--- a/drivers/memory/tegra/tegra186.c
+++ b/drivers/memory/tegra/tegra186.c
@@ -602,10 +602,29 @@ static const struct of_device_id tegra186_mc_of_match[] = {
};
MODULE_DEVICE_TABLE(of, tegra186_mc_of_match);
+static int tegra186_mc_suspend(struct device *dev)
+{
+ return 0;
+}
+
+static int tegra186_mc_resume(struct device *dev)
+{
+ struct tegra186_mc *mc = dev_get_drvdata(dev);
+
+ tegra186_mc_program_sid(mc);
+
+ return 0;
+}
+
+static const struct dev_pm_ops tegra186_mc_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(tegra186_mc_suspend, tegra186_mc_resume)
+};
+
static struct platform_driver tegra186_mc_driver = {
.driver = {
.name = "tegra186-mc",
.of_match_table = tegra186_mc_of_match,
+ .pm = &tegra186_mc_pm_ops,
.suppress_bind_attrs = true,
},
.prevent_deferred_probe = true,