diff options
Diffstat (limited to 'drivers/of')
| -rw-r--r-- | drivers/of/Kconfig | 1 | ||||
| -rw-r--r-- | drivers/of/fdt.c | 28 | ||||
| -rw-r--r-- | drivers/of/irq.c | 19 | ||||
| -rw-r--r-- | drivers/of/of_mdio.c | 38 | ||||
| -rw-r--r-- | drivers/of/of_numa.c | 4 | ||||
| -rw-r--r-- | drivers/of/of_reserved_mem.c | 94 |
6 files changed, 147 insertions, 37 deletions
diff --git a/drivers/of/Kconfig b/drivers/of/Kconfig index b3bec3aaa45d..bc07ad30c9bf 100644 --- a/drivers/of/Kconfig +++ b/drivers/of/Kconfig @@ -74,6 +74,7 @@ config OF_NET config OF_MDIO def_tristate PHYLIB depends on PHYLIB + select FIXED_PHY help OpenFirmware MDIO bus (Ethernet PHY) accessors diff --git a/drivers/of/fdt.c b/drivers/of/fdt.c index 14f2f8c7c260..0e02947a8a7a 100644 --- a/drivers/of/fdt.c +++ b/drivers/of/fdt.c @@ -395,7 +395,7 @@ static int unflatten_dt_nodes(const void *blob, struct device_node **nodepp) { struct device_node *root; - int offset = 0, depth = 0; + int offset = 0, depth = 0, initial_depth = 0; #define FDT_MAX_DEPTH 64 unsigned int fpsizes[FDT_MAX_DEPTH]; struct device_node *nps[FDT_MAX_DEPTH]; @@ -405,11 +405,22 @@ static int unflatten_dt_nodes(const void *blob, if (nodepp) *nodepp = NULL; + /* + * We're unflattening device sub-tree if @dad is valid. There are + * possibly multiple nodes in the first level of depth. We need + * set @depth to 1 to make fdt_next_node() happy as it bails + * immediately when negative @depth is found. Otherwise, the device + * nodes except the first one won't be unflattened successfully. + */ + if (dad) + depth = initial_depth = 1; + root = dad; fpsizes[depth] = dad ? strlen(of_node_full_name(dad)) : 0; nps[depth] = dad; + for (offset = 0; - offset >= 0 && depth >= 0; + offset >= 0 && depth >= initial_depth; offset = fdt_next_node(blob, offset, &depth)) { if (WARN_ON_ONCE(depth >= FDT_MAX_DEPTH)) continue; @@ -733,6 +744,19 @@ int __init of_scan_flat_dt(int (*it)(unsigned long node, } /** + * of_get_flat_dt_subnode_by_name - get the subnode by given name + * + * @node: the parent node + * @uname: the name of subnode + * @return offset of the subnode, or -FDT_ERR_NOTFOUND if there is none + */ + +int of_get_flat_dt_subnode_by_name(unsigned long node, const char *uname) +{ + return fdt_subnode_offset(initial_boot_params, node, uname); +} + +/** * of_get_flat_dt_root - find the root node in the flat blob */ unsigned long __init of_get_flat_dt_root(void) diff --git a/drivers/of/irq.c b/drivers/of/irq.c index e7bfc175b8e1..6ec743faabe8 100644 --- a/drivers/of/irq.c +++ b/drivers/of/irq.c @@ -386,13 +386,13 @@ int of_irq_to_resource(struct device_node *dev, int index, struct resource *r) EXPORT_SYMBOL_GPL(of_irq_to_resource); /** - * of_irq_get - Decode a node's IRQ and return it as a Linux irq number + * of_irq_get - Decode a node's IRQ and return it as a Linux IRQ number * @dev: pointer to device tree node - * @index: zero-based index of the irq - * - * Returns Linux irq number on success, or -EPROBE_DEFER if the irq domain - * is not yet created. + * @index: zero-based index of the IRQ * + * Returns Linux IRQ number on success, or 0 on the IRQ mapping failure, or + * -EPROBE_DEFER if the IRQ domain is not yet created, or error code in case + * of any other failure. */ int of_irq_get(struct device_node *dev, int index) { @@ -413,12 +413,13 @@ int of_irq_get(struct device_node *dev, int index) EXPORT_SYMBOL_GPL(of_irq_get); /** - * of_irq_get_byname - Decode a node's IRQ and return it as a Linux irq number + * of_irq_get_byname - Decode a node's IRQ and return it as a Linux IRQ number * @dev: pointer to device tree node - * @name: irq name + * @name: IRQ name * - * Returns Linux irq number on success, or -EPROBE_DEFER if the irq domain - * is not yet created, or error code in case of any other failure. + * Returns Linux IRQ number on success, or 0 on the IRQ mapping failure, or + * -EPROBE_DEFER if the IRQ domain is not yet created, or error code in case + * of any other failure. */ int of_irq_get_byname(struct device_node *dev, const char *name) { diff --git a/drivers/of/of_mdio.c b/drivers/of/of_mdio.c index e051e1b57609..b470f7e3521d 100644 --- a/drivers/of/of_mdio.c +++ b/drivers/of/of_mdio.c @@ -19,6 +19,7 @@ #include <linux/of_gpio.h> #include <linux/of_irq.h> #include <linux/of_mdio.h> +#include <linux/of_net.h> #include <linux/module.h> MODULE_AUTHOR("Grant Likely <grant.likely@secretlab.ca>"); @@ -332,6 +333,41 @@ struct phy_device *of_phy_connect(struct net_device *dev, EXPORT_SYMBOL(of_phy_connect); /** + * of_phy_get_and_connect + * - Get phy node and connect to the phy described in the device tree + * @dev: pointer to net_device claiming the phy + * @np: Pointer to device tree node for the net_device claiming the phy + * @hndlr: Link state callback for the network device + * + * If successful, returns a pointer to the phy_device with the embedded + * struct device refcount incremented by one, or NULL on failure. The + * refcount must be dropped by calling phy_disconnect() or phy_detach(). + */ +struct phy_device *of_phy_get_and_connect(struct net_device *dev, + struct device_node *np, + void (*hndlr)(struct net_device *)) +{ + phy_interface_t iface; + struct device_node *phy_np; + struct phy_device *phy; + + iface = of_get_phy_mode(np); + if (iface < 0) + return NULL; + + phy_np = of_parse_phandle(np, "phy-handle", 0); + if (!phy_np) + return NULL; + + phy = of_phy_connect(dev, phy_np, hndlr, 0, iface); + + of_node_put(phy_np); + + return phy; +} +EXPORT_SYMBOL(of_phy_get_and_connect); + +/** * of_phy_attach - Attach to a PHY without starting the state machine * @dev: pointer to net_device claiming the phy * @phy_np: Node pointer for the PHY @@ -361,7 +397,6 @@ struct phy_device *of_phy_attach(struct net_device *dev, } EXPORT_SYMBOL(of_phy_attach); -#if defined(CONFIG_FIXED_PHY) /* * of_phy_is_fixed_link() and of_phy_register_fixed_link() must * support two DT bindings: @@ -451,4 +486,3 @@ int of_phy_register_fixed_link(struct device_node *np) return -ENODEV; } EXPORT_SYMBOL(of_phy_register_fixed_link); -#endif diff --git a/drivers/of/of_numa.c b/drivers/of/of_numa.c index 0f2784bc1874..ed5a097f0801 100644 --- a/drivers/of/of_numa.c +++ b/drivers/of/of_numa.c @@ -91,8 +91,8 @@ static int __init of_numa_parse_memory_nodes(void) pr_debug("NUMA: base = %llx len = %llx, node = %u\n", rsrc.start, rsrc.end - rsrc.start + 1, nid); - r = numa_add_memblk(nid, rsrc.start, - rsrc.end - rsrc.start + 1); + + r = numa_add_memblk(nid, rsrc.start, rsrc.end + 1); if (r) break; } diff --git a/drivers/of/of_reserved_mem.c b/drivers/of/of_reserved_mem.c index ed01c0172e4a..06af99f64ad8 100644 --- a/drivers/of/of_reserved_mem.c +++ b/drivers/of/of_reserved_mem.c @@ -21,6 +21,7 @@ #include <linux/sizes.h> #include <linux/of_reserved_mem.h> #include <linux/sort.h> +#include <linux/slab.h> #define MAX_RESERVED_REGIONS 16 static struct reserved_mem reserved_mem[MAX_RESERVED_REGIONS]; @@ -127,8 +128,15 @@ static int __init __reserved_mem_alloc_size(unsigned long node, } /* Need adjust the alignment to satisfy the CMA requirement */ - if (IS_ENABLED(CONFIG_CMA) && of_flat_dt_is_compatible(node, "shared-dma-pool")) - align = max(align, (phys_addr_t)PAGE_SIZE << max(MAX_ORDER - 1, pageblock_order)); + if (IS_ENABLED(CONFIG_CMA) + && of_flat_dt_is_compatible(node, "shared-dma-pool") + && of_get_flat_dt_prop(node, "reusable", NULL) + && !of_get_flat_dt_prop(node, "no-map", NULL)) { + unsigned long order = + max_t(unsigned long, MAX_ORDER - 1, pageblock_order); + + align = max(align, (phys_addr_t)PAGE_SIZE << order); + } prop = of_get_flat_dt_prop(node, "alloc-ranges", &len); if (prop) { @@ -289,53 +297,95 @@ static inline struct reserved_mem *__find_rmem(struct device_node *node) return NULL; } +struct rmem_assigned_device { + struct device *dev; + struct reserved_mem *rmem; + struct list_head list; +}; + +static LIST_HEAD(of_rmem_assigned_device_list); +static DEFINE_MUTEX(of_rmem_assigned_device_mutex); + /** - * of_reserved_mem_device_init() - assign reserved memory region to given device + * of_reserved_mem_device_init_by_idx() - assign reserved memory region to + * given device + * @dev: Pointer to the device to configure + * @np: Pointer to the device_node with 'reserved-memory' property + * @idx: Index of selected region + * + * This function assigns respective DMA-mapping operations based on reserved + * memory region specified by 'memory-region' property in @np node to the @dev + * device. When driver needs to use more than one reserved memory region, it + * should allocate child devices and initialize regions by name for each of + * child device. * - * This function assign memory region pointed by "memory-region" device tree - * property to the given device. + * Returns error code or zero on success. */ -int of_reserved_mem_device_init(struct device *dev) +int of_reserved_mem_device_init_by_idx(struct device *dev, + struct device_node *np, int idx) { + struct rmem_assigned_device *rd; + struct device_node *target; struct reserved_mem *rmem; - struct device_node *np; int ret; - np = of_parse_phandle(dev->of_node, "memory-region", 0); - if (!np) + if (!np || !dev) + return -EINVAL; + + target = of_parse_phandle(np, "memory-region", idx); + if (!target) return -ENODEV; - rmem = __find_rmem(np); - of_node_put(np); + rmem = __find_rmem(target); + of_node_put(target); if (!rmem || !rmem->ops || !rmem->ops->device_init) return -EINVAL; + rd = kmalloc(sizeof(struct rmem_assigned_device), GFP_KERNEL); + if (!rd) + return -ENOMEM; + ret = rmem->ops->device_init(rmem, dev); - if (ret == 0) + if (ret == 0) { + rd->dev = dev; + rd->rmem = rmem; + + mutex_lock(&of_rmem_assigned_device_mutex); + list_add(&rd->list, &of_rmem_assigned_device_list); + mutex_unlock(&of_rmem_assigned_device_mutex); + dev_info(dev, "assigned reserved memory node %s\n", rmem->name); + } else { + kfree(rd); + } return ret; } -EXPORT_SYMBOL_GPL(of_reserved_mem_device_init); +EXPORT_SYMBOL_GPL(of_reserved_mem_device_init_by_idx); /** * of_reserved_mem_device_release() - release reserved memory device structures + * @dev: Pointer to the device to deconfigure * * This function releases structures allocated for memory region handling for * the given device. */ void of_reserved_mem_device_release(struct device *dev) { - struct reserved_mem *rmem; - struct device_node *np; - - np = of_parse_phandle(dev->of_node, "memory-region", 0); - if (!np) - return; - - rmem = __find_rmem(np); - of_node_put(np); + struct rmem_assigned_device *rd; + struct reserved_mem *rmem = NULL; + + mutex_lock(&of_rmem_assigned_device_mutex); + list_for_each_entry(rd, &of_rmem_assigned_device_list, list) { + if (rd->dev == dev) { + rmem = rd->rmem; + list_del(&rd->list); + kfree(rd); + break; + } + } + mutex_unlock(&of_rmem_assigned_device_mutex); if (!rmem || !rmem->ops || !rmem->ops->device_release) return; |