[PATCH V9 12/14] thermal: tegra: add PM support

[Wei Ni]

Add suspend/resume function in soctherm driver.

Signed-off-by: Wei Ni <w...@nvidia.com>
---
 drivers/thermal/tegra/soctherm.c | 46 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 46 insertions(+)

diff --git a/drivers/thermal/tegra/soctherm.c b/drivers/thermal/tegra/soctherm.c
index d2b7c255d71f..559c74279eb8 100644
--- a/drivers/thermal/tegra/soctherm.c
+++ b/drivers/thermal/tegra/soctherm.c
@@ -88,6 +88,7 @@ struct tegra_soctherm {
        struct clk *clock_tsensor;
        struct clk *clock_soctherm;
        void __iomem *regs;
+       struct thermal_zone_device **thermctl_tzs;
 
        u32 *calib;
        struct tegra_soctherm_soc *soc;
@@ -566,6 +567,12 @@ static int tegra_soctherm_probe(struct platform_device 
*pdev)
                        return err;
        }
 
+       tegra->thermctl_tzs = devm_kzalloc(&pdev->dev,
+                                          sizeof(*z) * soc->num_ttgs,
+                                          GFP_KERNEL);
+       if (!tegra->thermctl_tzs)
+               return -ENOMEM;
+
        err = soctherm_clk_enable(pdev, true);
        if (err)
                return err;
@@ -595,6 +602,7 @@ static int tegra_soctherm_probe(struct platform_device 
*pdev)
                }
 
                zone->tz = z;
+               tegra->thermctl_tzs[soc->ttgs[i]->id] = z;
 
                /* Configure hw trip points */
                tegra_soctherm_set_hwtrips(&pdev->dev, soc->ttgs[i], z);
@@ -621,11 +629,49 @@ static int tegra_soctherm_remove(struct platform_device 
*pdev)
        return 0;
 }
 
+static int soctherm_suspend(struct device *dev)
+{
+       struct platform_device *pdev = to_platform_device(dev);
+
+       soctherm_clk_enable(pdev, false);
+
+       return 0;
+}
+
+static int soctherm_resume(struct device *dev)
+{
+       struct platform_device *pdev = to_platform_device(dev);
+       struct tegra_soctherm *tegra = platform_get_drvdata(pdev);
+       struct tegra_soctherm_soc *soc = tegra->soc;
+       int err, i;
+
+       err = soctherm_clk_enable(pdev, true);
+       if (err) {
+               dev_err(&pdev->dev,
+                       "Resume failed: enable clocks failed\n");
+               return err;
+       }
+
+       soctherm_init(pdev);
+
+       for (i = 0; i < soc->num_ttgs; ++i) {
+               struct thermal_zone_device *tz;
+
+               tz = tegra->thermctl_tzs[soc->ttgs[i]->id];
+               tegra_soctherm_set_hwtrips(dev, soc->ttgs[i], tz);
+       }
+
+       return 0;
+}
+
+static SIMPLE_DEV_PM_OPS(tegra_soctherm_pm, soctherm_suspend, soctherm_resume);
+
 static struct platform_driver tegra_soctherm_driver = {
        .probe = tegra_soctherm_probe,
        .remove = tegra_soctherm_remove,
        .driver = {
                .name = "tegra_soctherm",
+               .pm = &tegra_soctherm_pm,
                .of_match_table = tegra_soctherm_of_match,
        },
 };
-- 
1.9.1