diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2023-04-27 10:09:05 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2023-04-27 10:09:05 -0700 |
commit | cb6fe2ceb667eb78f252d473b03deb23999ab1cf (patch) | |
tree | b230a03a1a7d763add665e6c5868fbe6798438db /drivers/of/base.c | |
parent | d42b1c47570eb2ed818dc3fe94b2678124af109d (diff) | |
parent | 1c5e9170ad93d3bd62a7ed8380e60b62c88b90a8 (diff) |
Merge tag 'devicetree-for-6.4-2' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux
Pull more devicetree updates from Rob Herring:
- First part of DT header detangling dropping cpu.h from of_device.h
and replacing some includes with forward declarations. A handful of
drivers needed some adjustment to their includes as a result.
- Refactor of_device.h to be used by bus drivers rather than various
device drivers. This moves non-bus related functions out of
of_device.h. The end goal is for of_platform.h and of_device.h to
stop including each other.
- Refactor open coded parsing of "ranges" in some bus drivers to use DT
address parsing functions
- Add some new address parsing functions of_property_read_reg(),
of_range_count(), and of_range_to_resource() in preparation to
convert more open coded parsing of DT addresses to use them.
- Treewide clean-ups to use of_property_read_bool() and
of_property_present() as appropriate. The ones here are the ones that
didn't get picked up elsewhere.
* tag 'devicetree-for-6.4-2' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux: (34 commits)
bus: tegra-gmi: Replace of_platform.h with explicit includes
hte: Use of_property_present() for testing DT property presence
w1: w1-gpio: Use of_property_read_bool() for boolean properties
virt: fsl: Use of_property_present() for testing DT property presence
soc: fsl: Use of_property_present() for testing DT property presence
sbus: display7seg: Use of_property_read_bool() for boolean properties
sparc: Use of_property_read_bool() for boolean properties
sparc: Use of_property_present() for testing DT property presence
bus: mvebu-mbus: Remove open coded "ranges" parsing
of/address: Add of_property_read_reg() helper
of/address: Add of_range_count() helper
of/address: Add support for 3 address cell bus
of/address: Add of_range_to_resource() helper
of: unittest: Add bus address range parsing tests
of: Drop cpu.h include from of_device.h
OPP: Adjust includes to remove of_device.h
irqchip: loongson-eiointc: Add explicit include for cpuhotplug.h
cpuidle: Adjust includes to remove of_device.h
cpufreq: sun50i: Add explicit include for cpu.h
cpufreq: Adjust includes to remove of_device.h
...
Diffstat (limited to 'drivers/of/base.c')
-rw-r--r-- | drivers/of/base.c | 187 |
1 files changed, 0 insertions, 187 deletions
diff --git a/drivers/of/base.c b/drivers/of/base.c index ac6fde53342f..7f1720af813c 100644 --- a/drivers/of/base.c +++ b/drivers/of/base.c @@ -287,193 +287,6 @@ const void *of_get_property(const struct device_node *np, const char *name, EXPORT_SYMBOL(of_get_property); /** - * of_get_cpu_hwid - Get the hardware ID from a CPU device node - * - * @cpun: CPU number(logical index) for which device node is required - * @thread: The local thread number to get the hardware ID for. - * - * Return: The hardware ID for the CPU node or ~0ULL if not found. - */ -u64 of_get_cpu_hwid(struct device_node *cpun, unsigned int thread) -{ - const __be32 *cell; - int ac, len; - - ac = of_n_addr_cells(cpun); - cell = of_get_property(cpun, "reg", &len); - if (!cell || !ac || ((sizeof(*cell) * ac * (thread + 1)) > len)) - return ~0ULL; - - cell += ac * thread; - return of_read_number(cell, ac); -} - -/* - * arch_match_cpu_phys_id - Match the given logical CPU and physical id - * - * @cpu: logical cpu index of a core/thread - * @phys_id: physical identifier of a core/thread - * - * CPU logical to physical index mapping is architecture specific. - * However this __weak function provides a default match of physical - * id to logical cpu index. phys_id provided here is usually values read - * from the device tree which must match the hardware internal registers. - * - * Returns true if the physical identifier and the logical cpu index - * correspond to the same core/thread, false otherwise. - */ -bool __weak arch_match_cpu_phys_id(int cpu, u64 phys_id) -{ - return (u32)phys_id == cpu; -} - -/* - * Checks if the given "prop_name" property holds the physical id of the - * core/thread corresponding to the logical cpu 'cpu'. If 'thread' is not - * NULL, local thread number within the core is returned in it. - */ -static bool __of_find_n_match_cpu_property(struct device_node *cpun, - const char *prop_name, int cpu, unsigned int *thread) -{ - const __be32 *cell; - int ac, prop_len, tid; - u64 hwid; - - ac = of_n_addr_cells(cpun); - cell = of_get_property(cpun, prop_name, &prop_len); - if (!cell && !ac && arch_match_cpu_phys_id(cpu, 0)) - return true; - if (!cell || !ac) - return false; - prop_len /= sizeof(*cell) * ac; - for (tid = 0; tid < prop_len; tid++) { - hwid = of_read_number(cell, ac); - if (arch_match_cpu_phys_id(cpu, hwid)) { - if (thread) - *thread = tid; - return true; - } - cell += ac; - } - return false; -} - -/* - * arch_find_n_match_cpu_physical_id - See if the given device node is - * for the cpu corresponding to logical cpu 'cpu'. Return true if so, - * else false. If 'thread' is non-NULL, the local thread number within the - * core is returned in it. - */ -bool __weak arch_find_n_match_cpu_physical_id(struct device_node *cpun, - int cpu, unsigned int *thread) -{ - /* Check for non-standard "ibm,ppc-interrupt-server#s" property - * for thread ids on PowerPC. If it doesn't exist fallback to - * standard "reg" property. - */ - if (IS_ENABLED(CONFIG_PPC) && - __of_find_n_match_cpu_property(cpun, - "ibm,ppc-interrupt-server#s", - cpu, thread)) - return true; - - return __of_find_n_match_cpu_property(cpun, "reg", cpu, thread); -} - -/** - * of_get_cpu_node - Get device node associated with the given logical CPU - * - * @cpu: CPU number(logical index) for which device node is required - * @thread: if not NULL, local thread number within the physical core is - * returned - * - * The main purpose of this function is to retrieve the device node for the - * given logical CPU index. It should be used to initialize the of_node in - * cpu device. Once of_node in cpu device is populated, all the further - * references can use that instead. - * - * CPU logical to physical index mapping is architecture specific and is built - * before booting secondary cores. This function uses arch_match_cpu_phys_id - * which can be overridden by architecture specific implementation. - * - * Return: A node pointer for the logical cpu with refcount incremented, use - * of_node_put() on it when done. Returns NULL if not found. - */ -struct device_node *of_get_cpu_node(int cpu, unsigned int *thread) -{ - struct device_node *cpun; - - for_each_of_cpu_node(cpun) { - if (arch_find_n_match_cpu_physical_id(cpun, cpu, thread)) - return cpun; - } - return NULL; -} -EXPORT_SYMBOL(of_get_cpu_node); - -/** - * of_cpu_node_to_id: Get the logical CPU number for a given device_node - * - * @cpu_node: Pointer to the device_node for CPU. - * - * Return: The logical CPU number of the given CPU device_node or -ENODEV if the - * CPU is not found. - */ -int of_cpu_node_to_id(struct device_node *cpu_node) -{ - int cpu; - bool found = false; - struct device_node *np; - - for_each_possible_cpu(cpu) { - np = of_cpu_device_node_get(cpu); - found = (cpu_node == np); - of_node_put(np); - if (found) - return cpu; - } - - return -ENODEV; -} -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. - * - * Return: An idle state node if 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 |