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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>
This commit is contained in:
Thierry Reding 2019-12-22 15:10:29 +01:00
parent 6d3ba76163
commit 177602b006
1 changed files with 19 additions and 0 deletions
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19
drivers/memory/tegra/tegra186.c
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@ -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,