diff options
Diffstat (limited to 'drivers/soc/tegra/fuse')
-rw-r--r-- | drivers/soc/tegra/fuse/fuse-tegra.c | 60 | ||||
-rw-r--r-- | drivers/soc/tegra/fuse/fuse-tegra20.c | 11 | ||||
-rw-r--r-- | drivers/soc/tegra/fuse/fuse-tegra30.c | 16 | ||||
-rw-r--r-- | drivers/soc/tegra/fuse/fuse.h | 2 |
4 files changed, 80 insertions, 9 deletions
diff --git a/drivers/soc/tegra/fuse/fuse-tegra.c b/drivers/soc/tegra/fuse/fuse-tegra.c index 3d9da3d359da..f2151815db58 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) @@ -246,14 +249,71 @@ static int tegra_fuse_probe(struct platform_device *pdev) return 0; 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 int __maybe_unused tegra_fuse_suspend(struct device *dev) +{ + int ret; + + /* + * Critical for RAM re-repair operation, which must occur on resume + * from LP1 system suspend and as part of CCPLEX cluster switching. + */ + if (fuse->soc->clk_suspend_on) + ret = pm_runtime_resume_and_get(dev); + else + ret = pm_runtime_force_suspend(dev); + + return ret; +} + +static int __maybe_unused tegra_fuse_resume(struct device *dev) +{ + int ret = 0; + + if (fuse->soc->clk_suspend_on) + pm_runtime_put(dev); + else + ret = pm_runtime_force_resume(dev); + + return ret; +} + +static const struct dev_pm_ops tegra_fuse_pm = { + SET_RUNTIME_PM_OPS(tegra_fuse_runtime_suspend, tegra_fuse_runtime_resume, + NULL) + SET_SYSTEM_SLEEP_PM_OPS(tegra_fuse_suspend, tegra_fuse_resume) +}; + 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, diff --git a/drivers/soc/tegra/fuse/fuse-tegra20.c b/drivers/soc/tegra/fuse/fuse-tegra20.c index 16aaa28573ac..8ec9fc5e5e4b 100644 --- a/drivers/soc/tegra/fuse/fuse-tegra20.c +++ b/drivers/soc/tegra/fuse/fuse-tegra20.c @@ -16,6 +16,7 @@ #include <linux/kobject.h> #include <linux/of_device.h> #include <linux/platform_device.h> +#include <linux/pm_runtime.h> #include <linux/random.h> #include <soc/tegra/fuse.h> @@ -46,6 +47,10 @@ static u32 tegra20_fuse_read(struct tegra_fuse *fuse, unsigned int offset) u32 value = 0; int err; + err = pm_runtime_resume_and_get(fuse->dev); + if (err) + return err; + mutex_lock(&fuse->apbdma.lock); fuse->apbdma.config.src_addr = fuse->phys + FUSE_BEGIN + offset; @@ -66,8 +71,6 @@ static u32 tegra20_fuse_read(struct tegra_fuse *fuse, unsigned int offset) reinit_completion(&fuse->apbdma.wait); - clk_prepare_enable(fuse->clk); - dmaengine_submit(dma_desc); dma_async_issue_pending(fuse->apbdma.chan); time_left = wait_for_completion_timeout(&fuse->apbdma.wait, @@ -78,10 +81,9 @@ static u32 tegra20_fuse_read(struct tegra_fuse *fuse, unsigned int offset) else value = *fuse->apbdma.virt; - clk_disable_unprepare(fuse->clk); - out: mutex_unlock(&fuse->apbdma.lock); + pm_runtime_put(fuse->dev); return value; } @@ -165,4 +167,5 @@ const struct tegra_fuse_soc tegra20_fuse_soc = { .probe = tegra20_fuse_probe, .info = &tegra20_fuse_info, .soc_attr_group = &tegra_soc_attr_group, + .clk_suspend_on = false, }; diff --git a/drivers/soc/tegra/fuse/fuse-tegra30.c b/drivers/soc/tegra/fuse/fuse-tegra30.c index c1aa7815bd6e..b071d433d74f 100644 --- a/drivers/soc/tegra/fuse/fuse-tegra30.c +++ b/drivers/soc/tegra/fuse/fuse-tegra30.c @@ -12,6 +12,7 @@ #include <linux/of_device.h> #include <linux/of_address.h> #include <linux/platform_device.h> +#include <linux/pm_runtime.h> #include <linux/random.h> #include <soc/tegra/fuse.h> @@ -52,15 +53,13 @@ static u32 tegra30_fuse_read(struct tegra_fuse *fuse, unsigned int offset) u32 value; int err; - err = clk_prepare_enable(fuse->clk); - if (err < 0) { - dev_err(fuse->dev, "failed to enable FUSE clock: %d\n", err); + err = pm_runtime_resume_and_get(fuse->dev); + if (err) return 0; - } value = readl_relaxed(fuse->base + FUSE_BEGIN + offset); - clk_disable_unprepare(fuse->clk); + pm_runtime_put(fuse->dev); return value; } @@ -113,6 +112,7 @@ const struct tegra_fuse_soc tegra30_fuse_soc = { .speedo_init = tegra30_init_speedo_data, .info = &tegra30_fuse_info, .soc_attr_group = &tegra_soc_attr_group, + .clk_suspend_on = false, }; #endif @@ -128,6 +128,7 @@ const struct tegra_fuse_soc tegra114_fuse_soc = { .speedo_init = tegra114_init_speedo_data, .info = &tegra114_fuse_info, .soc_attr_group = &tegra_soc_attr_group, + .clk_suspend_on = false, }; #endif @@ -209,6 +210,7 @@ const struct tegra_fuse_soc tegra124_fuse_soc = { .lookups = tegra124_fuse_lookups, .num_lookups = ARRAY_SIZE(tegra124_fuse_lookups), .soc_attr_group = &tegra_soc_attr_group, + .clk_suspend_on = true, }; #endif @@ -295,6 +297,7 @@ const struct tegra_fuse_soc tegra210_fuse_soc = { .lookups = tegra210_fuse_lookups, .num_lookups = ARRAY_SIZE(tegra210_fuse_lookups), .soc_attr_group = &tegra_soc_attr_group, + .clk_suspend_on = false, }; #endif @@ -325,6 +328,7 @@ const struct tegra_fuse_soc tegra186_fuse_soc = { .lookups = tegra186_fuse_lookups, .num_lookups = ARRAY_SIZE(tegra186_fuse_lookups), .soc_attr_group = &tegra_soc_attr_group, + .clk_suspend_on = false, }; #endif @@ -355,6 +359,7 @@ const struct tegra_fuse_soc tegra194_fuse_soc = { .lookups = tegra194_fuse_lookups, .num_lookups = ARRAY_SIZE(tegra194_fuse_lookups), .soc_attr_group = &tegra194_soc_attr_group, + .clk_suspend_on = false, }; #endif @@ -385,5 +390,6 @@ const struct tegra_fuse_soc tegra234_fuse_soc = { .lookups = tegra234_fuse_lookups, .num_lookups = ARRAY_SIZE(tegra234_fuse_lookups), .soc_attr_group = &tegra194_soc_attr_group, + .clk_suspend_on = false, }; #endif diff --git a/drivers/soc/tegra/fuse/fuse.h b/drivers/soc/tegra/fuse/fuse.h index e057a58e2060..de58feba0435 100644 --- a/drivers/soc/tegra/fuse/fuse.h +++ b/drivers/soc/tegra/fuse/fuse.h @@ -34,6 +34,8 @@ struct tegra_fuse_soc { unsigned int num_lookups; const struct attribute_group *soc_attr_group; + + bool clk_suspend_on; }; struct tegra_fuse { |