diff options
Diffstat (limited to 'drivers/devfreq')
| -rw-r--r-- | drivers/devfreq/devfreq-event.c | 14 | ||||
| -rw-r--r-- | drivers/devfreq/devfreq.c | 68 | ||||
| -rw-r--r-- | drivers/devfreq/exynos-bus.c | 7 | ||||
| -rw-r--r-- | drivers/devfreq/rk3399_dmc.c | 2 | ||||
| -rw-r--r-- | drivers/devfreq/tegra30-devfreq.c | 12 |
5 files changed, 71 insertions, 32 deletions
diff --git a/drivers/devfreq/devfreq-event.c b/drivers/devfreq/devfreq-event.c index 56efbeb7851e..6765c03334bc 100644 --- a/drivers/devfreq/devfreq-event.c +++ b/drivers/devfreq/devfreq-event.c @@ -213,20 +213,21 @@ EXPORT_SYMBOL_GPL(devfreq_event_reset_event); * devfreq_event_get_edev_by_phandle() - Get the devfreq-event dev from * devicetree. * @dev : the pointer to the given device + * @phandle_name: name of property holding a phandle value * @index : the index into list of devfreq-event device * * Note that this function return the pointer of devfreq-event device. */ struct devfreq_event_dev *devfreq_event_get_edev_by_phandle(struct device *dev, - int index) + const char *phandle_name, int index) { struct device_node *node; struct devfreq_event_dev *edev; - if (!dev->of_node) + if (!dev->of_node || !phandle_name) return ERR_PTR(-EINVAL); - node = of_parse_phandle(dev->of_node, "devfreq-events", index); + node = of_parse_phandle(dev->of_node, phandle_name, index); if (!node) return ERR_PTR(-ENODEV); @@ -258,19 +259,20 @@ EXPORT_SYMBOL_GPL(devfreq_event_get_edev_by_phandle); /** * devfreq_event_get_edev_count() - Get the count of devfreq-event dev * @dev : the pointer to the given device + * @phandle_name: name of property holding a phandle value * * Note that this function return the count of devfreq-event devices. */ -int devfreq_event_get_edev_count(struct device *dev) +int devfreq_event_get_edev_count(struct device *dev, const char *phandle_name) { int count; - if (!dev->of_node) { + if (!dev->of_node || !phandle_name) { dev_err(dev, "device does not have a device node entry\n"); return -EINVAL; } - count = of_property_count_elems_of_size(dev->of_node, "devfreq-events", + count = of_property_count_elems_of_size(dev->of_node, phandle_name, sizeof(u32)); if (count < 0) { dev_err(dev, diff --git a/drivers/devfreq/devfreq.c b/drivers/devfreq/devfreq.c index 561d91b2d3bf..861c100f9fac 100644 --- a/drivers/devfreq/devfreq.c +++ b/drivers/devfreq/devfreq.c @@ -984,47 +984,74 @@ EXPORT_SYMBOL(devm_devfreq_add_device); #ifdef CONFIG_OF /* + * devfreq_get_devfreq_by_node - Get the devfreq device from devicetree + * @node - pointer to device_node + * + * return the instance of devfreq device + */ +struct devfreq *devfreq_get_devfreq_by_node(struct device_node *node) +{ + struct devfreq *devfreq; + + if (!node) + return ERR_PTR(-EINVAL); + + mutex_lock(&devfreq_list_lock); + list_for_each_entry(devfreq, &devfreq_list, node) { + if (devfreq->dev.parent + && devfreq->dev.parent->of_node == node) { + mutex_unlock(&devfreq_list_lock); + return devfreq; + } + } + mutex_unlock(&devfreq_list_lock); + + return ERR_PTR(-ENODEV); +} + +/* * devfreq_get_devfreq_by_phandle - Get the devfreq device from devicetree * @dev - instance to the given device + * @phandle_name - name of property holding a phandle value * @index - index into list of devfreq * * return the instance of devfreq device */ -struct devfreq *devfreq_get_devfreq_by_phandle(struct device *dev, int index) +struct devfreq *devfreq_get_devfreq_by_phandle(struct device *dev, + const char *phandle_name, int index) { struct device_node *node; struct devfreq *devfreq; - if (!dev) + if (!dev || !phandle_name) return ERR_PTR(-EINVAL); if (!dev->of_node) return ERR_PTR(-EINVAL); - node = of_parse_phandle(dev->of_node, "devfreq", index); + node = of_parse_phandle(dev->of_node, phandle_name, index); if (!node) return ERR_PTR(-ENODEV); - mutex_lock(&devfreq_list_lock); - list_for_each_entry(devfreq, &devfreq_list, node) { - if (devfreq->dev.parent - && devfreq->dev.parent->of_node == node) { - mutex_unlock(&devfreq_list_lock); - of_node_put(node); - return devfreq; - } - } - mutex_unlock(&devfreq_list_lock); + devfreq = devfreq_get_devfreq_by_node(node); of_node_put(node); - return ERR_PTR(-EPROBE_DEFER); + return devfreq; } + #else -struct devfreq *devfreq_get_devfreq_by_phandle(struct device *dev, int index) +struct devfreq *devfreq_get_devfreq_by_node(struct device_node *node) +{ + return ERR_PTR(-ENODEV); +} + +struct devfreq *devfreq_get_devfreq_by_phandle(struct device *dev, + const char *phandle_name, int index) { return ERR_PTR(-ENODEV); } #endif /* CONFIG_OF */ +EXPORT_SYMBOL_GPL(devfreq_get_devfreq_by_node); EXPORT_SYMBOL_GPL(devfreq_get_devfreq_by_phandle); /** @@ -1766,20 +1793,23 @@ static int devfreq_summary_show(struct seq_file *s, void *data) struct devfreq *p_devfreq = NULL; unsigned long cur_freq, min_freq, max_freq; unsigned int polling_ms; + unsigned int timer; - seq_printf(s, "%-30s %-30s %-15s %10s %12s %12s %12s\n", + seq_printf(s, "%-30s %-30s %-15s %-10s %10s %12s %12s %12s\n", "dev", "parent_dev", "governor", + "timer", "polling_ms", "cur_freq_Hz", "min_freq_Hz", "max_freq_Hz"); - seq_printf(s, "%30s %30s %15s %10s %12s %12s %12s\n", + seq_printf(s, "%30s %30s %15s %10s %10s %12s %12s %12s\n", "------------------------------", "------------------------------", "---------------", "----------", + "----------", "------------", "------------", "------------"); @@ -1803,13 +1833,15 @@ static int devfreq_summary_show(struct seq_file *s, void *data) cur_freq = devfreq->previous_freq; get_freq_range(devfreq, &min_freq, &max_freq); polling_ms = devfreq->profile->polling_ms; + timer = devfreq->profile->timer; mutex_unlock(&devfreq->lock); seq_printf(s, - "%-30s %-30s %-15s %10d %12ld %12ld %12ld\n", + "%-30s %-30s %-15s %-10s %10d %12ld %12ld %12ld\n", dev_name(&devfreq->dev), p_devfreq ? dev_name(&p_devfreq->dev) : "null", devfreq->governor_name, + polling_ms ? timer_name[timer] : "null", polling_ms, cur_freq, min_freq, diff --git a/drivers/devfreq/exynos-bus.c b/drivers/devfreq/exynos-bus.c index 8fa8eb541373..1e684a448c9e 100644 --- a/drivers/devfreq/exynos-bus.c +++ b/drivers/devfreq/exynos-bus.c @@ -193,7 +193,7 @@ static int exynos_bus_parent_parse_of(struct device_node *np, * Get the devfreq-event devices to get the current utilization of * buses. This raw data will be used in devfreq ondemand governor. */ - count = devfreq_event_get_edev_count(dev); + count = devfreq_event_get_edev_count(dev, "devfreq-events"); if (count < 0) { dev_err(dev, "failed to get the count of devfreq-event dev\n"); ret = count; @@ -209,7 +209,8 @@ static int exynos_bus_parent_parse_of(struct device_node *np, } for (i = 0; i < count; i++) { - bus->edev[i] = devfreq_event_get_edev_by_phandle(dev, i); + bus->edev[i] = devfreq_event_get_edev_by_phandle(dev, + "devfreq-events", i); if (IS_ERR(bus->edev[i])) { ret = -EPROBE_DEFER; goto err_regulator; @@ -360,7 +361,7 @@ static int exynos_bus_profile_init_passive(struct exynos_bus *bus, profile->exit = exynos_bus_passive_exit; /* Get the instance of parent devfreq device */ - parent_devfreq = devfreq_get_devfreq_by_phandle(dev, 0); + parent_devfreq = devfreq_get_devfreq_by_phandle(dev, "devfreq", 0); if (IS_ERR(parent_devfreq)) return -EPROBE_DEFER; diff --git a/drivers/devfreq/rk3399_dmc.c b/drivers/devfreq/rk3399_dmc.c index 027769e39f9b..2e912166a993 100644 --- a/drivers/devfreq/rk3399_dmc.c +++ b/drivers/devfreq/rk3399_dmc.c @@ -341,7 +341,7 @@ static int rk3399_dmcfreq_probe(struct platform_device *pdev) return PTR_ERR(data->dmc_clk); } - data->edev = devfreq_event_get_edev_by_phandle(dev, 0); + data->edev = devfreq_event_get_edev_by_phandle(dev, "devfreq-events", 0); if (IS_ERR(data->edev)) return -EPROBE_DEFER; diff --git a/drivers/devfreq/tegra30-devfreq.c b/drivers/devfreq/tegra30-devfreq.c index e94a27804c20..f5e74c2ede85 100644 --- a/drivers/devfreq/tegra30-devfreq.c +++ b/drivers/devfreq/tegra30-devfreq.c @@ -822,8 +822,6 @@ static int tegra_devfreq_probe(struct platform_device *pdev) return err; } - reset_control_assert(tegra->reset); - err = clk_prepare_enable(tegra->clock); if (err) { dev_err(&pdev->dev, @@ -831,12 +829,17 @@ static int tegra_devfreq_probe(struct platform_device *pdev) return err; } - reset_control_deassert(tegra->reset); + err = reset_control_reset(tegra->reset); + if (err) { + dev_err(&pdev->dev, "Failed to reset hardware: %d\n", err); + goto disable_clk; + } rate = clk_round_rate(tegra->emc_clock, ULONG_MAX); if (rate < 0) { dev_err(&pdev->dev, "Failed to round clock rate: %ld\n", rate); - return rate; + err = rate; + goto disable_clk; } tegra->max_freq = rate / KHZ; @@ -897,6 +900,7 @@ remove_opps: dev_pm_opp_remove_all_dynamic(&pdev->dev); reset_control_reset(tegra->reset); +disable_clk: clk_disable_unprepare(tegra->clock); return err; |