diff options
Diffstat (limited to 'drivers/soc/tegra/pmc.c')
| -rw-r--r-- | drivers/soc/tegra/pmc.c | 171 |
1 files changed, 134 insertions, 37 deletions
diff --git a/drivers/soc/tegra/pmc.c b/drivers/soc/tegra/pmc.c index 0df258518693..5648e5c09ef5 100644 --- a/drivers/soc/tegra/pmc.c +++ b/drivers/soc/tegra/pmc.c @@ -272,6 +272,14 @@ static const char * const tegra30_reset_sources[] = { "WATCHDOG", "SENSOR", "SW_MAIN", + "LP0" +}; + +static const char * const tegra210_reset_sources[] = { + "POWER_ON_RESET", + "WATCHDOG", + "SENSOR", + "SW_MAIN", "LP0", "AOTAG" }; @@ -656,10 +664,15 @@ static int tegra_genpd_power_on(struct generic_pm_domain *domain) int err; err = tegra_powergate_power_up(pg, true); - if (err) + if (err) { dev_err(dev, "failed to turn on PM domain %s: %d\n", pg->genpd.name, err); + goto out; + } + + reset_control_release(pg->reset); +out: return err; } @@ -669,10 +682,18 @@ static int tegra_genpd_power_off(struct generic_pm_domain *domain) struct device *dev = pg->pmc->dev; int err; + err = reset_control_acquire(pg->reset); + if (err < 0) { + pr_err("failed to acquire resets: %d\n", err); + return err; + } + err = tegra_powergate_power_down(pg); - if (err) + if (err) { dev_err(dev, "failed to turn off PM domain %s: %d\n", pg->genpd.name, err); + reset_control_release(pg->reset); + } return err; } @@ -937,38 +958,53 @@ static int tegra_powergate_of_get_resets(struct tegra_powergate *pg, struct device *dev = pg->pmc->dev; int err; - pg->reset = of_reset_control_array_get_exclusive(np); + pg->reset = of_reset_control_array_get_exclusive_released(np); if (IS_ERR(pg->reset)) { err = PTR_ERR(pg->reset); dev_err(dev, "failed to get device resets: %d\n", err); return err; } - if (off) + err = reset_control_acquire(pg->reset); + if (err < 0) { + pr_err("failed to acquire resets: %d\n", err); + goto out; + } + + if (off) { err = reset_control_assert(pg->reset); - else + } else { err = reset_control_deassert(pg->reset); + if (err < 0) + goto out; - if (err) + reset_control_release(pg->reset); + } + +out: + if (err) { + reset_control_release(pg->reset); reset_control_put(pg->reset); + } return err; } -static void tegra_powergate_add(struct tegra_pmc *pmc, struct device_node *np) +static int tegra_powergate_add(struct tegra_pmc *pmc, struct device_node *np) { struct device *dev = pmc->dev; struct tegra_powergate *pg; - int id, err; + int id, err = 0; bool off; pg = kzalloc(sizeof(*pg), GFP_KERNEL); if (!pg) - return; + return -ENOMEM; id = tegra_powergate_lookup(pmc, np->name); if (id < 0) { dev_err(dev, "powergate lookup failed for %pOFn: %d\n", np, id); + err = -ENODEV; goto free_mem; } @@ -1021,7 +1057,7 @@ static void tegra_powergate_add(struct tegra_pmc *pmc, struct device_node *np) dev_dbg(dev, "added PM domain %s\n", pg->genpd.name); - return; + return 0; remove_genpd: pm_genpd_remove(&pg->genpd); @@ -1040,25 +1076,67 @@ set_available: free_mem: kfree(pg); + + return err; } -static void tegra_powergate_init(struct tegra_pmc *pmc, - struct device_node *parent) +static int tegra_powergate_init(struct tegra_pmc *pmc, + struct device_node *parent) { struct device_node *np, *child; - unsigned int i; + int err = 0; + + np = of_get_child_by_name(parent, "powergates"); + if (!np) + return 0; + + for_each_child_of_node(np, child) { + err = tegra_powergate_add(pmc, child); + if (err < 0) { + of_node_put(child); + break; + } + } + + of_node_put(np); + + return err; +} + +static void tegra_powergate_remove(struct generic_pm_domain *genpd) +{ + struct tegra_powergate *pg = to_powergate(genpd); + + reset_control_put(pg->reset); + + while (pg->num_clks--) + clk_put(pg->clks[pg->num_clks]); + + kfree(pg->clks); - /* Create a bitmap of the available and valid partitions */ - for (i = 0; i < pmc->soc->num_powergates; i++) - if (pmc->soc->powergates[i]) - set_bit(i, pmc->powergates_available); + set_bit(pg->id, pmc->powergates_available); + + kfree(pg); +} + +static void tegra_powergate_remove_all(struct device_node *parent) +{ + struct generic_pm_domain *genpd; + struct device_node *np, *child; np = of_get_child_by_name(parent, "powergates"); if (!np) return; - for_each_child_of_node(np, child) - tegra_powergate_add(pmc, child); + for_each_child_of_node(np, child) { + of_genpd_del_provider(child); + + genpd = of_genpd_remove_last(child); + if (IS_ERR(genpd)) + continue; + + tegra_powergate_remove(genpd); + } of_node_put(np); } @@ -1709,13 +1787,16 @@ static int tegra_pmc_pinctrl_init(struct tegra_pmc *pmc) static ssize_t reset_reason_show(struct device *dev, struct device_attribute *attr, char *buf) { - u32 value, rst_src; + u32 value; value = tegra_pmc_readl(pmc, pmc->soc->regs->rst_status); - rst_src = (value & pmc->soc->regs->rst_source_mask) >> - pmc->soc->regs->rst_source_shift; + value &= pmc->soc->regs->rst_source_mask; + value >>= pmc->soc->regs->rst_source_shift; + + if (WARN_ON(value >= pmc->soc->num_reset_sources)) + return sprintf(buf, "%s\n", "UNKNOWN"); - return sprintf(buf, "%s\n", pmc->soc->reset_sources[rst_src]); + return sprintf(buf, "%s\n", pmc->soc->reset_sources[value]); } static DEVICE_ATTR_RO(reset_reason); @@ -1723,13 +1804,16 @@ static DEVICE_ATTR_RO(reset_reason); static ssize_t reset_level_show(struct device *dev, struct device_attribute *attr, char *buf) { - u32 value, rst_lvl; + u32 value; value = tegra_pmc_readl(pmc, pmc->soc->regs->rst_status); - rst_lvl = (value & pmc->soc->regs->rst_level_mask) >> - pmc->soc->regs->rst_level_shift; + value &= pmc->soc->regs->rst_level_mask; + value >>= pmc->soc->regs->rst_level_shift; - return sprintf(buf, "%s\n", pmc->soc->reset_levels[rst_lvl]); + if (WARN_ON(value >= pmc->soc->num_reset_levels)) + return sprintf(buf, "%s\n", "UNKNOWN"); + + return sprintf(buf, "%s\n", pmc->soc->reset_levels[value]); } static DEVICE_ATTR_RO(reset_level); @@ -1999,7 +2083,7 @@ static int tegra_pmc_probe(struct platform_device *pdev) if (IS_ENABLED(CONFIG_DEBUG_FS)) { err = tegra_powergate_debugfs_init(); if (err < 0) - return err; + goto cleanup_sysfs; } err = register_restart_handler(&tegra_pmc_restart_handler); @@ -2013,9 +2097,13 @@ static int tegra_pmc_probe(struct platform_device *pdev) if (err) goto cleanup_restart_handler; + err = tegra_powergate_init(pmc, pdev->dev.of_node); + if (err < 0) + goto cleanup_powergates; + err = tegra_pmc_irq_init(pmc); if (err < 0) - goto cleanup_restart_handler; + goto cleanup_powergates; mutex_lock(&pmc->powergates_lock); iounmap(pmc->base); @@ -2026,10 +2114,15 @@ static int tegra_pmc_probe(struct platform_device *pdev) return 0; +cleanup_powergates: + tegra_powergate_remove_all(pdev->dev.of_node); cleanup_restart_handler: unregister_restart_handler(&tegra_pmc_restart_handler); cleanup_debugfs: debugfs_remove(pmc->debugfs); +cleanup_sysfs: + device_remove_file(&pdev->dev, &dev_attr_reset_reason); + device_remove_file(&pdev->dev, &dev_attr_reset_level); return err; } @@ -2185,7 +2278,7 @@ static const struct tegra_pmc_soc tegra30_pmc_soc = { .init = tegra20_pmc_init, .setup_irq_polarity = tegra20_pmc_setup_irq_polarity, .reset_sources = tegra30_reset_sources, - .num_reset_sources = 5, + .num_reset_sources = ARRAY_SIZE(tegra30_reset_sources), .reset_levels = NULL, .num_reset_levels = 0, }; @@ -2236,7 +2329,7 @@ static const struct tegra_pmc_soc tegra114_pmc_soc = { .init = tegra20_pmc_init, .setup_irq_polarity = tegra20_pmc_setup_irq_polarity, .reset_sources = tegra30_reset_sources, - .num_reset_sources = 5, + .num_reset_sources = ARRAY_SIZE(tegra30_reset_sources), .reset_levels = NULL, .num_reset_levels = 0, }; @@ -2347,7 +2440,7 @@ static const struct tegra_pmc_soc tegra124_pmc_soc = { .init = tegra20_pmc_init, .setup_irq_polarity = tegra20_pmc_setup_irq_polarity, .reset_sources = tegra30_reset_sources, - .num_reset_sources = 5, + .num_reset_sources = ARRAY_SIZE(tegra30_reset_sources), .reset_levels = NULL, .num_reset_levels = 0, }; @@ -2452,8 +2545,8 @@ static const struct tegra_pmc_soc tegra210_pmc_soc = { .regs = &tegra20_pmc_regs, .init = tegra20_pmc_init, .setup_irq_polarity = tegra20_pmc_setup_irq_polarity, - .reset_sources = tegra30_reset_sources, - .num_reset_sources = 5, + .reset_sources = tegra210_reset_sources, + .num_reset_sources = ARRAY_SIZE(tegra210_reset_sources), .reset_levels = NULL, .num_reset_levels = 0, }; @@ -2578,9 +2671,9 @@ static const struct tegra_pmc_soc tegra186_pmc_soc = { .init = NULL, .setup_irq_polarity = tegra186_pmc_setup_irq_polarity, .reset_sources = tegra186_reset_sources, - .num_reset_sources = 14, + .num_reset_sources = ARRAY_SIZE(tegra186_reset_sources), .reset_levels = tegra186_reset_levels, - .num_reset_levels = 3, + .num_reset_levels = ARRAY_SIZE(tegra186_reset_levels), .num_wake_events = ARRAY_SIZE(tegra186_wake_events), .wake_events = tegra186_wake_events, }; @@ -2719,6 +2812,7 @@ static int __init tegra_pmc_early_init(void) const struct of_device_id *match; struct device_node *np; struct resource regs; + unsigned int i; bool invert; mutex_init(&pmc->powergates_lock); @@ -2775,7 +2869,10 @@ static int __init tegra_pmc_early_init(void) if (pmc->soc->maybe_tz_only) pmc->tz_only = tegra_pmc_detect_tz_only(pmc); - tegra_powergate_init(pmc, np); + /* Create a bitmap of the available and valid partitions */ + for (i = 0; i < pmc->soc->num_powergates; i++) + if (pmc->soc->powergates[i]) + set_bit(i, pmc->powergates_available); /* * Invert the interrupt polarity if a PMC device tree node |