diff options
| author | Dmitry Osipenko <digetx@gmail.com> | 2021-08-03 01:13:34 +0300 |
|---|---|---|
| committer | Thierry Reding <treding@nvidia.com> | 2021-08-11 12:55:04 +0300 |
| commit | 24a15252ff049ca76bdcc51dd445503b88b2c6df (patch) | |
| tree | 5a79709ff16ad1562f7153eed1c5b19a252bb325 /drivers/soc/tegra/fuse/fuse-tegra.c | |
| parent | a65a4ea1563218b401a9a638a198e2b8165e967a (diff) | |
| download | linux-24a15252ff049ca76bdcc51dd445503b88b2c6df.tar.xz | |
soc/tegra: fuse: Add runtime PM support
The Tegra FUSE belongs to the core power domain and we're going to enable
GENPD support for the core domain. Now FUSE device must be resumed using
runtime PM API in order to initialize the FUSE power state. Add runtime PM
support to the FUSE driver.
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Diffstat (limited to 'drivers/soc/tegra/fuse/fuse-tegra.c')
| -rw-r--r-- | drivers/soc/tegra/fuse/fuse-tegra.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/drivers/soc/tegra/fuse/fuse-tegra.c b/drivers/soc/tegra/fuse/fuse-tegra.c index 2434c570b53c..747237865aff 100644 --- a/drivers/soc/tegra/fuse/fuse-tegra.c +++ b/drivers/soc/tegra/fuse/fuse-tegra.c @@ -13,6 +13,7 @@ #include <linux/of.h> #include <linux/of_address.h> #include <linux/platform_device.h> +#include <linux/pm_runtime.h> #include <linux/slab.h> #include <linux/sys_soc.h> @@ -210,6 +211,8 @@ static int tegra_fuse_probe(struct platform_device *pdev) platform_set_drvdata(pdev, fuse); fuse->dev = &pdev->dev; + pm_runtime_enable(&pdev->dev); + if (fuse->soc->probe) { err = fuse->soc->probe(fuse); if (err < 0) @@ -248,13 +251,40 @@ static int tegra_fuse_probe(struct platform_device *pdev) restore: fuse->clk = NULL; fuse->base = base; + pm_runtime_disable(&pdev->dev); return err; } +static int __maybe_unused tegra_fuse_runtime_resume(struct device *dev) +{ + int err; + + err = clk_prepare_enable(fuse->clk); + if (err < 0) { + dev_err(dev, "failed to enable FUSE clock: %d\n", err); + return err; + } + + return 0; +} + +static int __maybe_unused tegra_fuse_runtime_suspend(struct device *dev) +{ + clk_disable_unprepare(fuse->clk); + + return 0; +} + +static const struct dev_pm_ops tegra_fuse_pm = { + SET_RUNTIME_PM_OPS(tegra_fuse_runtime_suspend, tegra_fuse_runtime_resume, + NULL) +}; + static struct platform_driver tegra_fuse_driver = { .driver = { .name = "tegra-fuse", .of_match_table = tegra_fuse_match, + .pm = &tegra_fuse_pm, .suppress_bind_attrs = true, }, .probe = tegra_fuse_probe, |