diff options
Diffstat (limited to 'drivers/of')
| -rw-r--r-- | drivers/of/base.c | 36 | ||||
| -rw-r--r-- | drivers/of/device.c | 2 | ||||
| -rw-r--r-- | drivers/of/of_mdio.c | 17 |
3 files changed, 50 insertions, 5 deletions
diff --git a/drivers/of/base.c b/drivers/of/base.c index 8d173fb3552a..ae03b1218b06 100644 --- a/drivers/of/base.c +++ b/drivers/of/base.c @@ -416,6 +416,42 @@ int of_cpu_node_to_id(struct device_node *cpu_node) EXPORT_SYMBOL(of_cpu_node_to_id); /** + * of_get_cpu_state_node - Get CPU's idle state node at the given index + * + * @cpu_node: The device node for the CPU + * @index: The index in the list of the idle states + * + * Two generic methods can be used to describe a CPU's idle states, either via + * a flattened description through the "cpu-idle-states" binding or via the + * hierarchical layout, using the "power-domains" and the "domain-idle-states" + * bindings. This function check for both and returns the idle state node for + * the requested index. + * + * In case an idle state node is found at @index, the refcount is incremented + * for it, so call of_node_put() on it when done. Returns NULL if not found. + */ +struct device_node *of_get_cpu_state_node(struct device_node *cpu_node, + int index) +{ + struct of_phandle_args args; + int err; + + err = of_parse_phandle_with_args(cpu_node, "power-domains", + "#power-domain-cells", 0, &args); + if (!err) { + struct device_node *state_node = + of_parse_phandle(args.np, "domain-idle-states", index); + + of_node_put(args.np); + if (state_node) + return state_node; + } + + return of_parse_phandle(cpu_node, "cpu-idle-states", index); +} +EXPORT_SYMBOL(of_get_cpu_state_node); + +/** * __of_device_is_compatible() - Check if the node matches given constraints * @device: pointer to node * @compat: required compatible string, NULL or "" for any match diff --git a/drivers/of/device.c b/drivers/of/device.c index e9127db7b067..27203bfd0b22 100644 --- a/drivers/of/device.c +++ b/drivers/of/device.c @@ -161,7 +161,7 @@ int of_dma_configure(struct device *dev, struct device_node *np, bool force_dma) coherent ? " " : " not "); iommu = of_iommu_configure(dev, np); - if (IS_ERR(iommu) && PTR_ERR(iommu) == -EPROBE_DEFER) + if (PTR_ERR(iommu) == -EPROBE_DEFER) return -EPROBE_DEFER; dev_dbg(dev, "device is%sbehind an iommu\n", diff --git a/drivers/of/of_mdio.c b/drivers/of/of_mdio.c index f5c2a5487761..8270bbf505fb 100644 --- a/drivers/of/of_mdio.c +++ b/drivers/of/of_mdio.c @@ -81,13 +81,15 @@ static int of_mdiobus_register_phy(struct mii_bus *mdio, else phy = get_phy_device(mdio, addr, is_c45); if (IS_ERR(phy)) { - unregister_mii_timestamper(mii_ts); + if (mii_ts) + unregister_mii_timestamper(mii_ts); return PTR_ERR(phy); } rc = of_irq_get(child, 0); if (rc == -EPROBE_DEFER) { - unregister_mii_timestamper(mii_ts); + if (mii_ts) + unregister_mii_timestamper(mii_ts); phy_device_free(phy); return rc; } @@ -116,12 +118,19 @@ static int of_mdiobus_register_phy(struct mii_bus *mdio, * register it */ rc = phy_device_register(phy); if (rc) { - unregister_mii_timestamper(mii_ts); + if (mii_ts) + unregister_mii_timestamper(mii_ts); phy_device_free(phy); of_node_put(child); return rc; } - phy->mii_ts = mii_ts; + + /* phy->mii_ts may already be defined by the PHY driver. A + * mii_timestamper probed via the device tree will still have + * precedence. + */ + if (mii_ts) + phy->mii_ts = mii_ts; dev_dbg(&mdio->dev, "registered phy %pOFn at address %i\n", child, addr); |
