diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/base/cpu.c | 2 | ||||
| -rw-r--r-- | drivers/bus/arm-cci.c | 28 | ||||
| -rw-r--r-- | drivers/cpufreq/arm_big_little_dt.c | 40 | ||||
| -rw-r--r-- | drivers/cpufreq/cpufreq-cpu0.c | 23 | ||||
| -rw-r--r-- | drivers/cpufreq/highbank-cpufreq.c | 18 | ||||
| -rw-r--r-- | drivers/cpufreq/imx6q-cpufreq.c | 4 | ||||
| -rw-r--r-- | drivers/cpufreq/kirkwood-cpufreq.c | 8 | ||||
| -rw-r--r-- | drivers/cpufreq/maple-cpufreq.c | 23 | ||||
| -rw-r--r-- | drivers/cpufreq/pmac32-cpufreq.c | 5 | ||||
| -rw-r--r-- | drivers/cpufreq/pmac64-cpufreq.c | 47 | ||||
| -rw-r--r-- | drivers/cpufreq/spear-cpufreq.c | 4 | ||||
| -rw-r--r-- | drivers/of/base.c | 95 |
12 files changed, 153 insertions, 144 deletions
diff --git a/drivers/base/cpu.c b/drivers/base/cpu.c index 4c358bc44c72..4cf071764be3 100644 --- a/drivers/base/cpu.c +++ b/drivers/base/cpu.c @@ -14,6 +14,7 @@ #include <linux/slab.h> #include <linux/percpu.h> #include <linux/acpi.h> +#include <linux/of.h> #include "base.h" @@ -289,6 +290,7 @@ int register_cpu(struct cpu *cpu, int num) cpu->dev.release = cpu_device_release; cpu->dev.offline_disabled = !cpu->hotpluggable; cpu->dev.offline = !cpu_online(num); + cpu->dev.of_node = of_get_cpu_node(num, NULL); #ifdef CONFIG_ARCH_HAS_CPU_AUTOPROBE cpu->dev.bus->uevent = arch_cpu_uevent; #endif diff --git a/drivers/bus/arm-cci.c b/drivers/bus/arm-cci.c index 733288967d4d..200926699778 100644 --- a/drivers/bus/arm-cci.c +++ b/drivers/bus/arm-cci.c @@ -122,17 +122,8 @@ EXPORT_SYMBOL_GPL(cci_ace_get_port); static void __init cci_ace_init_ports(void) { - int port, ac, cpu; - u64 hwid; - const u32 *cell; - struct device_node *cpun, *cpus; - - cpus = of_find_node_by_path("/cpus"); - if (WARN(!cpus, "Missing cpus node, bailing out\n")) - return; - - if (WARN_ON(of_property_read_u32(cpus, "#address-cells", &ac))) - ac = of_n_addr_cells(cpus); + int port, cpu; + struct device_node *cpun; /* * Port index look-up speeds up the function disabling ports by CPU, @@ -141,18 +132,13 @@ static void __init cci_ace_init_ports(void) * The stashed index array is initialized for all possible CPUs * at probe time. */ - for_each_child_of_node(cpus, cpun) { - if (of_node_cmp(cpun->type, "cpu")) - continue; - cell = of_get_property(cpun, "reg", NULL); - if (WARN(!cell, "%s: missing reg property\n", cpun->full_name)) - continue; - - hwid = of_read_number(cell, ac); - cpu = get_logical_index(hwid & MPIDR_HWID_BITMASK); + for_each_possible_cpu(cpu) { + /* too early to use cpu->of_node */ + cpun = of_get_cpu_node(cpu, NULL); - if (cpu < 0 || !cpu_possible(cpu)) + if (WARN(!cpun, "Missing cpu device node\n")) continue; + port = __cci_ace_get_port(cpun, ACE_PORT); if (port < 0) continue; diff --git a/drivers/cpufreq/arm_big_little_dt.c b/drivers/cpufreq/arm_big_little_dt.c index fd9e3ea6a480..480c0bd0468d 100644 --- a/drivers/cpufreq/arm_big_little_dt.c +++ b/drivers/cpufreq/arm_big_little_dt.c @@ -19,12 +19,11 @@ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt -#include <linux/cpu.h> #include <linux/cpufreq.h> #include <linux/device.h> #include <linux/export.h> #include <linux/module.h> -#include <linux/of.h> +#include <linux/of_device.h> #include <linux/opp.h> #include <linux/platform_device.h> #include <linux/slab.h> @@ -34,27 +33,13 @@ /* get cpu node with valid operating-points */ static struct device_node *get_cpu_node_with_valid_op(int cpu) { - struct device_node *np = NULL, *parent; - int count = 0; + struct device_node *np = of_cpu_device_node_get(cpu); - parent = of_find_node_by_path("/cpus"); - if (!parent) { - pr_err("failed to find OF /cpus\n"); - return NULL; + if (!of_get_property(np, "operating-points", NULL)) { + of_node_put(np); + np = NULL; } - for_each_child_of_node(parent, np) { - if (count++ != cpu) - continue; - if (!of_get_property(np, "operating-points", NULL)) { - of_node_put(np); - np = NULL; - } - - break; - } - - of_node_put(parent); return np; } @@ -63,11 +48,12 @@ static int dt_init_opp_table(struct device *cpu_dev) struct device_node *np; int ret; - np = get_cpu_node_with_valid_op(cpu_dev->id); - if (!np) - return -ENODATA; + np = of_node_get(cpu_dev->of_node); + if (!np) { + pr_err("failed to find cpu%d node\n", cpu_dev->id); + return -ENOENT; + } - cpu_dev->of_node = np; ret = of_init_opp_table(cpu_dev); of_node_put(np); @@ -79,9 +65,11 @@ static int dt_get_transition_latency(struct device *cpu_dev) struct device_node *np; u32 transition_latency = CPUFREQ_ETERNAL; - np = get_cpu_node_with_valid_op(cpu_dev->id); - if (!np) + np = of_node_get(cpu_dev->of_node); + if (!np) { + pr_info("Failed to find cpu node. Use CPUFREQ_ETERNAL transition latency\n"); return CPUFREQ_ETERNAL; + } of_property_read_u32(np, "clock-latency", &transition_latency); of_node_put(np); diff --git a/drivers/cpufreq/cpufreq-cpu0.c b/drivers/cpufreq/cpufreq-cpu0.c index 09cd3a76fb2e..bad620e996e5 100644 --- a/drivers/cpufreq/cpufreq-cpu0.c +++ b/drivers/cpufreq/cpufreq-cpu0.c @@ -174,29 +174,17 @@ static struct cpufreq_driver cpu0_cpufreq_driver = { static int cpu0_cpufreq_probe(struct platform_device *pdev) { - struct device_node *np, *parent; + struct device_node *np; int ret; - parent = of_find_node_by_path("/cpus"); - if (!parent) { - pr_err("failed to find OF /cpus\n"); - return -ENOENT; - } - - for_each_child_of_node(parent, np) { - if (of_get_property(np, "operating-points", NULL)) - break; - } + cpu_dev = &pdev->dev; + np = of_node_get(cpu_dev->of_node); if (!np) { pr_err("failed to find cpu0 node\n"); - ret = -ENOENT; - goto out_put_parent; + return -ENOENT; } - cpu_dev = &pdev->dev; - cpu_dev->of_node = np; - cpu_reg = devm_regulator_get(cpu_dev, "cpu0"); if (IS_ERR(cpu_reg)) { /* @@ -268,15 +256,12 @@ static int cpu0_cpufreq_probe(struct platform_device *pdev) } of_node_put(np); - of_node_put(parent); return 0; out_free_table: opp_free_cpufreq_table(cpu_dev, &freq_table); out_put_node: of_node_put(np); -out_put_parent: - of_node_put(parent); return ret; } diff --git a/drivers/cpufreq/highbank-cpufreq.c b/drivers/cpufreq/highbank-cpufreq.c index b61b5a3fad64..794123fcf3e3 100644 --- a/drivers/cpufreq/highbank-cpufreq.c +++ b/drivers/cpufreq/highbank-cpufreq.c @@ -69,23 +69,17 @@ static int hb_cpufreq_driver_init(void) if (!of_machine_is_compatible("calxeda,highbank")) return -ENODEV; - for_each_child_of_node(of_find_node_by_path("/cpus"), np) - if (of_get_property(np, "operating-points", NULL)) - break; - - if (!np) { - pr_err("failed to find highbank cpufreq node\n"); - return -ENOENT; - } - cpu_dev = get_cpu_device(0); if (!cpu_dev) { pr_err("failed to get highbank cpufreq device\n"); - ret = -ENODEV; - goto out_put_node; + return -ENODEV; } - cpu_dev->of_node = np; + np = of_node_get(cpu_dev->of_node); + if (!np) { + pr_err("failed to find highbank cpufreq node\n"); + return -ENOENT; + } cpu_clk = clk_get(cpu_dev, NULL); if (IS_ERR(cpu_clk)) { diff --git a/drivers/cpufreq/imx6q-cpufreq.c b/drivers/cpufreq/imx6q-cpufreq.c index e37cdaedbb5b..b16632bb5a56 100644 --- a/drivers/cpufreq/imx6q-cpufreq.c +++ b/drivers/cpufreq/imx6q-cpufreq.c @@ -221,14 +221,12 @@ static int imx6q_cpufreq_probe(struct platform_device *pdev) cpu_dev = &pdev->dev; - np = of_find_node_by_path("/cpus/cpu@0"); + np = of_node_get(cpu_dev->of_node); if (!np) { dev_err(cpu_dev, "failed to find cpu0 node\n"); return -ENOENT; } - cpu_dev->of_node = np; - arm_clk = devm_clk_get(cpu_dev, "arm"); pll1_sys_clk = devm_clk_get(cpu_dev, "pll1_sys"); pll1_sw_clk = devm_clk_get(cpu_dev, "pll1_sw"); diff --git a/drivers/cpufreq/kirkwood-cpufreq.c b/drivers/cpufreq/kirkwood-cpufreq.c index 45e4d7fc261d..ba10658a9394 100644 --- a/drivers/cpufreq/kirkwood-cpufreq.c +++ b/drivers/cpufreq/kirkwood-cpufreq.c @@ -14,7 +14,7 @@ #include <linux/clk.h> #include <linux/clk-provider.h> #include <linux/cpufreq.h> -#include <linux/of.h> +#include <linux/of_device.h> #include <linux/platform_device.h> #include <linux/io.h> #include <asm/proc-fns.h> @@ -174,9 +174,11 @@ static int kirkwood_cpufreq_probe(struct platform_device *pdev) if (IS_ERR(priv.base)) return PTR_ERR(priv.base); - np = of_find_node_by_path("/cpus/cpu@0"); - if (!np) + np = of_cpu_device_node_get(0); + if (!np) { + dev_err(&pdev->dev, "failed to get cpu device node\n"); return -ENODEV; + } priv.cpu_clk = of_clk_get_by_name(np, "cpu_clk"); if (IS_ERR(priv.cpu_clk)) { diff --git a/drivers/cpufreq/maple-cpufreq.c b/drivers/cpufreq/maple-cpufreq.c index 41c601f4631e..6168d77b296d 100644 --- a/drivers/cpufreq/maple-cpufreq.c +++ b/drivers/cpufreq/maple-cpufreq.c @@ -24,7 +24,7 @@ #include <linux/completion.h> #include <linux/mutex.h> #include <linux/time.h> -#include <linux/of.h> +#include <linux/of_device.h> #define DBG(fmt...) pr_debug(fmt) @@ -200,7 +200,6 @@ static struct cpufreq_driver maple_cpufreq_driver = { static int __init maple_cpufreq_init(void) { - struct device_node *cpus; struct device_node *cpunode; unsigned int psize; unsigned long max_freq; @@ -216,24 +215,11 @@ static int __init maple_cpufreq_init(void) !of_machine_is_compatible("Momentum,Apache")) return 0; - cpus = of_find_node_by_path("/cpus"); - if (cpus == NULL) { - DBG("No /cpus node !\n"); - return -ENODEV; - } - /* Get first CPU node */ - for (cpunode = NULL; - (cpunode = of_get_next_child(cpus, cpunode)) != NULL;) { - const u32 *reg = of_get_property(cpunode, "reg", NULL); - if (reg == NULL || (*reg) != 0) - continue; - if (!strcmp(cpunode->type, "cpu")) - break; - } + cpunode = of_cpu_device_node_get(0); if (cpunode == NULL) { printk(KERN_ERR "cpufreq: Can't find any CPU 0 node\n"); - goto bail_cpus; + goto bail_noprops; } /* Check 970FX for now */ @@ -289,14 +275,11 @@ static int __init maple_cpufreq_init(void) rc = cpufreq_register_driver(&maple_cpufreq_driver); of_node_put(cpunode); - of_node_put(cpus); return rc; bail_noprops: of_node_put(cpunode); -bail_cpus: - of_node_put(cpus); return rc; } diff --git a/drivers/cpufreq/pmac32-cpufreq.c b/drivers/cpufreq/pmac32-cpufreq.c index 38cdc63c38da..a096cd3fa23d 100644 --- a/drivers/cpufreq/pmac32-cpufreq.c +++ b/drivers/cpufreq/pmac32-cpufreq.c @@ -25,6 +25,7 @@ #include <linux/init.h> #include <linux/device.h> #include <linux/hardirq.h> +#include <linux/of_device.h> #include <asm/prom.h> #include <asm/machdep.h> #include <asm/irq.h> @@ -648,8 +649,8 @@ static int __init pmac_cpufreq_setup(void) if (strstr(cmd_line, "nocpufreq")) return 0; - /* Assume only one CPU */ - cpunode = of_find_node_by_type(NULL, "cpu"); + /* Get first CPU node */ + cpunode = of_cpu_device_node_get(0); if (!cpunode) goto out; diff --git a/drivers/cpufreq/pmac64-cpufreq.c b/drivers/cpufreq/pmac64-cpufreq.c index b6850d97f0d5..3a51ad7e47c8 100644 --- a/drivers/cpufreq/pmac64-cpufreq.c +++ b/drivers/cpufreq/pmac64-cpufreq.c @@ -22,6 +22,7 @@ #include <linux/init.h> #include <linux/completion.h> #include <linux/mutex.h> +#include <linux/of_device.h> #include <asm/prom.h> #include <asm/machdep.h> #include <asm/irq.h> @@ -382,9 +383,8 @@ static struct cpufreq_driver g5_cpufreq_driver = { #ifdef CONFIG_PMAC_SMU -static int __init g5_neo2_cpufreq_init(struct device_node *cpus) +static int __init g5_neo2_cpufreq_init(struct device_node *cpunode) { - struct device_node *cpunode; unsigned int psize, ssize; unsigned long max_freq; char *freq_method, *volt_method; @@ -404,20 +404,6 @@ static int __init g5_neo2_cpufreq_init(struct device_node *cpus) else return -ENODEV; - /* Get first CPU node */ - for (cpunode = NULL; - (cpunode = of_get_next_child(cpus, cpunode)) != NULL;) { - const u32 *reg = of_get_property(cpunode, "reg", NULL); - if (reg == NULL || (*reg) != 0) - continue; - if (!strcmp(cpunode->type, "cpu")) - break; - } - if (cpunode == NULL) { - printk(KERN_ERR "cpufreq: Can't find any CPU 0 node\n"); - return -ENODEV; - } - /* Check 970FX for now */ valp = of_get_property(cpunode, "cpu-version", NULL); if (!valp) { @@ -535,9 +521,9 @@ static int __init g5_neo2_cpufreq_init(struct device_node *cpus) #endif /* CONFIG_PMAC_SMU */ -static int __init g5_pm72_cpufreq_init(struct device_node *cpus) +static int __init g5_pm72_cpufreq_init(struct device_node *cpunode) { - struct device_node *cpuid = NULL, *hwclock = NULL, *cpunode = NULL; + struct device_node *cpuid = NULL, *hwclock = NULL; const u8 *eeprom = NULL; const u32 *valp; u64 max_freq, min_freq, ih, il; @@ -546,17 +532,6 @@ static int __init g5_pm72_cpufreq_init(struct device_node *cpus) DBG("cpufreq: Initializing for PowerMac7,2, PowerMac7,3 and" " RackMac3,1...\n"); - /* Get first CPU node */ - for (cpunode = NULL; - (cpunode = of_get_next_child(cpus, cpunode)) != NULL;) { - if (!strcmp(cpunode->type, "cpu")) - break; - } - if (cpunode == NULL) { - printk(KERN_ERR "cpufreq: Can't find any CPU node\n"); - return -ENODEV; - } - /* Lookup the cpuid eeprom node */ cpuid = of_find_node_by_path("/u3@0,f8000000/i2c@f8001000/cpuid@a0"); if (cpuid != NULL) @@ -716,25 +691,25 @@ static int __init g5_pm72_cpufreq_init(struct device_node *cpus) static int __init g5_cpufreq_init(void) { - struct device_node *cpus; + struct device_node *cpunode; int rc = 0; - cpus = of_find_node_by_path("/cpus"); - if (cpus == NULL) { - DBG("No /cpus node !\n"); + /* Get first CPU node */ + cpunode = of_cpu_device_node_get(0); + if (cpunode == NULL) { + pr_err("cpufreq: Can't find any CPU node\n"); return -ENODEV; } if (of_machine_is_compatible("PowerMac7,2") || of_machine_is_compatible("PowerMac7,3") || of_machine_is_compatible("RackMac3,1")) - rc = g5_pm72_cpufreq_init(cpus); + rc = g5_pm72_cpufreq_init(cpunode); #ifdef CONFIG_PMAC_SMU else - rc = g5_neo2_cpufreq_init(cpus); + rc = g5_neo2_cpufreq_init(cpunode); #endif /* CONFIG_PMAC_SMU */ - of_node_put(cpus); return rc; } diff --git a/drivers/cpufreq/spear-cpufreq.c b/drivers/cpufreq/spear-cpufreq.c index c3efa7f2a908..19e364fa5955 100644 --- a/drivers/cpufreq/spear-cpufreq.c +++ b/drivers/cpufreq/spear-cpufreq.c @@ -18,7 +18,7 @@ #include <linux/err.h> #include <linux/init.h> #include <linux/module.h> -#include <linux/of.h> +#include <linux/of_device.h> #include <linux/slab.h> #include <linux/types.h> @@ -223,7 +223,7 @@ static int spear_cpufreq_driver_init(void) const __be32 *val; int cnt, i, ret; - np = of_find_node_by_path("/cpus/cpu@0"); + np = of_cpu_device_node_get(0); if (!np) { pr_err("No cpu node found"); return -ENODEV; diff --git a/drivers/of/base.c b/drivers/of/base.c index 5c5427918eb2..605afa9fbe5e 100644 --- a/drivers/of/base.c +++ b/drivers/of/base.c @@ -18,6 +18,7 @@ * 2 of the License, or (at your option) any later version. */ #include <linux/ctype.h> +#include <linux/cpu.h> #include <linux/module.h> #include <linux/of.h> #include <linux/spinlock.h> @@ -230,6 +231,100 @@ const void *of_get_property(const struct device_node *np, const char *name, } EXPORT_SYMBOL(of_get_property); +/* + * 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) + return false; + prop_len /= sizeof(*cell); + 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; +} + +/** + * 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. + * + * Returns a node pointer for the logical cpu if found, else NULL. + */ +struct device_node *of_get_cpu_node(int cpu, unsigned int *thread) +{ + struct device_node *cpun, *cpus; + + cpus = of_find_node_by_path("/cpus"); + if (!cpus) { + pr_warn("Missing cpus node, bailing out\n"); + return NULL; + } + + for_each_child_of_node(cpus, cpun) { + if (of_node_cmp(cpun->type, "cpu")) + continue; + /* 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 cpun; + if (__of_find_n_match_cpu_property(cpun, "reg", cpu, thread)) + return cpun; + } + return NULL; +} +EXPORT_SYMBOL(of_get_cpu_node); + /** Checks if the given "compat" string matches one of the strings in * the device's "compatible" property */ |