diff options
Diffstat (limited to 'drivers/of')
| -rw-r--r-- | drivers/of/Kconfig | 9 | ||||
| -rw-r--r-- | drivers/of/Makefile | 1 | ||||
| -rw-r--r-- | drivers/of/base.c | 40 | ||||
| -rw-r--r-- | drivers/of/device.c | 30 | ||||
| -rw-r--r-- | drivers/of/of_mtd.c | 85 | ||||
| -rw-r--r-- | drivers/of/platform.c | 6 | ||||
| -rw-r--r-- | drivers/of/selftest.c | 29 |
7 files changed, 179 insertions, 21 deletions
diff --git a/drivers/of/Kconfig b/drivers/of/Kconfig index 268163d..8e84ce9 100644 --- a/drivers/of/Kconfig +++ b/drivers/of/Kconfig @@ -35,9 +35,10 @@ config OF_EARLY_FLATTREE config OF_PROMTREE bool +# Hardly any platforms need this. It is safe to select, but only do so if you +# need it. config OF_DYNAMIC - def_bool y - depends on PPC_OF + bool config OF_ADDRESS def_bool y @@ -90,4 +91,8 @@ config OF_PCI_IRQ help OpenFirmware PCI IRQ routing helpers +config OF_MTD + depends on MTD + def_bool y + endmenu # OF diff --git a/drivers/of/Makefile b/drivers/of/Makefile index a73f5a5..aa90e60 100644 --- a/drivers/of/Makefile +++ b/drivers/of/Makefile @@ -12,3 +12,4 @@ obj-$(CONFIG_OF_SELFTEST) += selftest.o obj-$(CONFIG_OF_MDIO) += of_mdio.o obj-$(CONFIG_OF_PCI) += of_pci.o obj-$(CONFIG_OF_PCI_IRQ) += of_pci_irq.o +obj-$(CONFIG_OF_MTD) += of_mtd.o diff --git a/drivers/of/base.c b/drivers/of/base.c index 133908a..5806449 100644 --- a/drivers/of/base.c +++ b/drivers/of/base.c @@ -88,7 +88,7 @@ int of_n_size_cells(struct device_node *np) } EXPORT_SYMBOL(of_n_size_cells); -#if !defined(CONFIG_SPARC) /* SPARC doesn't do ref counting (yet) */ +#if defined(CONFIG_OF_DYNAMIC) /** * of_node_get - Increment refcount of a node * @node: Node to inc refcount, NULL is supported to @@ -161,7 +161,7 @@ void of_node_put(struct device_node *node) kref_put(&node->kref, of_node_release); } EXPORT_SYMBOL(of_node_put); -#endif /* !CONFIG_SPARC */ +#endif /* CONFIG_OF_DYNAMIC */ struct property *of_find_property(const struct device_node *np, const char *name, @@ -761,6 +761,42 @@ int of_property_read_string_index(struct device_node *np, const char *propname, } EXPORT_SYMBOL_GPL(of_property_read_string_index); +/** + * of_property_match_string() - Find string in a list and return index + * @np: pointer to node containing string list property + * @propname: string list property name + * @string: pointer to string to search for in string list + * + * This function searches a string list property and returns the index + * of a specific string value. + */ +int of_property_match_string(struct device_node *np, const char *propname, + const char *string) +{ + struct property *prop = of_find_property(np, propname, NULL); + size_t l; + int i; + const char *p, *end; + + if (!prop) + return -EINVAL; + if (!prop->value) + return -ENODATA; + + p = prop->value; + end = p + prop->length; + + for (i = 0; p < end; i++, p += l) { + l = strlen(p) + 1; + if (p + l > end) + return -EILSEQ; + pr_debug("comparing %s with %s\n", string, p); + if (strcmp(string, p) == 0) + return i; /* Found it; return index */ + } + return -ENODATA; +} +EXPORT_SYMBOL_GPL(of_property_match_string); /** * of_property_count_strings - Find and return the number of strings from a diff --git a/drivers/of/device.c b/drivers/of/device.c index 62b4b32..4c74e4f 100644 --- a/drivers/of/device.c +++ b/drivers/of/device.c @@ -128,39 +128,41 @@ ssize_t of_device_get_modalias(struct device *dev, char *str, ssize_t len) /** * of_device_uevent - Display OF related uevent information */ -int of_device_uevent(struct device *dev, struct kobj_uevent_env *env) +void of_device_uevent(struct device *dev, struct kobj_uevent_env *env) { const char *compat; int seen = 0, cplen, sl; if ((!dev) || (!dev->of_node)) - return -ENODEV; - - if (add_uevent_var(env, "OF_NAME=%s", dev->of_node->name)) - return -ENOMEM; + return; - if (add_uevent_var(env, "OF_TYPE=%s", dev->of_node->type)) - return -ENOMEM; + add_uevent_var(env, "OF_NAME=%s", dev->of_node->name); + add_uevent_var(env, "OF_FULLNAME=%s", dev->of_node->full_name); + if (dev->of_node->type && strcmp("<NULL>", dev->of_node->type) != 0) + add_uevent_var(env, "OF_TYPE=%s", dev->of_node->type); /* Since the compatible field can contain pretty much anything * it's not really legal to split it out with commas. We split it * up using a number of environment variables instead. */ - compat = of_get_property(dev->of_node, "compatible", &cplen); while (compat && *compat && cplen > 0) { - if (add_uevent_var(env, "OF_COMPATIBLE_%d=%s", seen, compat)) - return -ENOMEM; - + add_uevent_var(env, "OF_COMPATIBLE_%d=%s", seen, compat); sl = strlen(compat) + 1; compat += sl; cplen -= sl; seen++; } + add_uevent_var(env, "OF_COMPATIBLE_N=%d", seen); +} - if (add_uevent_var(env, "OF_COMPATIBLE_N=%d", seen)) - return -ENOMEM; +int of_device_uevent_modalias(struct device *dev, struct kobj_uevent_env *env) +{ + int sl; + + if ((!dev) || (!dev->of_node)) + return -ENODEV; - /* modalias is trickier, we add it in 2 steps */ + /* Devicetree modalias is tricky, we add it in 2 steps */ if (add_uevent_var(env, "MODALIAS=")) return -ENOMEM; diff --git a/drivers/of/of_mtd.c b/drivers/of/of_mtd.c new file mode 100644 index 0000000..e7cad62 --- /dev/null +++ b/drivers/of/of_mtd.c @@ -0,0 +1,85 @@ +/* + * Copyright 2012 Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> + * + * OF helpers for mtd. + * + * This file is released under the GPLv2 + * + */ +#include <linux/kernel.h> +#include <linux/of_mtd.h> +#include <linux/mtd/nand.h> +#include <linux/export.h> + +/** + * It maps 'enum nand_ecc_modes_t' found in include/linux/mtd/nand.h + * into the device tree binding of 'nand-ecc', so that MTD + * device driver can get nand ecc from device tree. + */ +static const char *nand_ecc_modes[] = { + [NAND_ECC_NONE] = "none", + [NAND_ECC_SOFT] = "soft", + [NAND_ECC_HW] = "hw", + [NAND_ECC_HW_SYNDROME] = "hw_syndrome", + [NAND_ECC_HW_OOB_FIRST] = "hw_oob_first", + [NAND_ECC_SOFT_BCH] = "soft_bch", +}; + +/** + * of_get_nand_ecc_mode - Get nand ecc mode for given device_node + * @np: Pointer to the given device_node + * + * The function gets ecc mode string from property 'nand-ecc-mode', + * and return its index in nand_ecc_modes table, or errno in error case. + */ +const int of_get_nand_ecc_mode(struct device_node *np) +{ + const char *pm; + int err, i; + + err = of_property_read_string(np, "nand-ecc-mode", &pm); + if (err < 0) + return err; + + for (i = 0; i < ARRAY_SIZE(nand_ecc_modes); i++) + if (!strcasecmp(pm, nand_ecc_modes[i])) + return i; + + return -ENODEV; +} +EXPORT_SYMBOL_GPL(of_get_nand_ecc_mode); + +/** + * of_get_nand_bus_width - Get nand bus witdh for given device_node + * @np: Pointer to the given device_node + * + * return bus width option, or errno in error case. + */ +int of_get_nand_bus_width(struct device_node *np) +{ + u32 val; + + if (of_property_read_u32(np, "nand-bus-width", &val)) + return 8; + + switch(val) { + case 8: + case 16: + return val; + default: + return -EIO; + } +} +EXPORT_SYMBOL_GPL(of_get_nand_bus_width); + +/** + * of_get_nand_on_flash_bbt - Get nand on flash bbt for given device_node + * @np: Pointer to the given device_node + * + * return true if present false other wise + */ +bool of_get_nand_on_flash_bbt(struct device_node *np) +{ + return of_property_read_bool(np, "nand-on-flash-bbt"); +} +EXPORT_SYMBOL_GPL(of_get_nand_on_flash_bbt); diff --git a/drivers/of/platform.c b/drivers/of/platform.c index 20fbebd..343ad29 100644 --- a/drivers/of/platform.c +++ b/drivers/of/platform.c @@ -253,7 +253,7 @@ static struct amba_device *of_amba_device_create(struct device_node *node, if (!of_device_is_available(node)) return NULL; - dev = kzalloc(sizeof(*dev), GFP_KERNEL); + dev = amba_device_alloc(NULL, 0, 0); if (!dev) return NULL; @@ -283,14 +283,14 @@ static struct amba_device *of_amba_device_create(struct device_node *node, if (ret) goto err_free; - ret = amba_device_register(dev, &iomem_resource); + ret = amba_device_add(dev, &iomem_resource); if (ret) goto err_free; return dev; err_free: - kfree(dev); + amba_device_put(dev); return NULL; } #else /* CONFIG_ARM_AMBA */ diff --git a/drivers/of/selftest.c b/drivers/of/selftest.c index 9d2b480..f24ffd7 100644 --- a/drivers/of/selftest.c +++ b/drivers/of/selftest.c @@ -120,6 +120,34 @@ static void __init of_selftest_parse_phandle_with_args(void) pr_info("end - %s\n", passed_all ? "PASS" : "FAIL"); } +static void __init of_selftest_property_match_string(void) +{ + struct device_node *np; + int rc; + + pr_info("start\n"); + np = of_find_node_by_path("/testcase-data/phandle-tests/consumer-a"); + if (!np) { + pr_err("No testcase data in device tree\n"); + return; + } + + rc = of_property_match_string(np, "phandle-list-names", "first"); + selftest(rc == 0, "first expected:0 got:%i\n", rc); + rc = of_property_match_string(np, "phandle-list-names", "second"); + selftest(rc == 1, "second expected:0 got:%i\n", rc); + rc = of_property_match_string(np, "phandle-list-names", "third"); + selftest(rc == 2, "third expected:0 got:%i\n", rc); + rc = of_property_match_string(np, "phandle-list-names", "fourth"); + selftest(rc == -ENODATA, "unmatched string; rc=%i", rc); + rc = of_property_match_string(np, "missing-property", "blah"); + selftest(rc == -EINVAL, "missing property; rc=%i", rc); + rc = of_property_match_string(np, "empty-property", "blah"); + selftest(rc == -ENODATA, "empty property; rc=%i", rc); + rc = of_property_match_string(np, "unterminated-string", "blah"); + selftest(rc == -EILSEQ, "unterminated string; rc=%i", rc); +} + static int __init of_selftest(void) { struct device_node *np; @@ -133,6 +161,7 @@ static int __init of_selftest(void) pr_info("start of selftest - you will see error messages\n"); of_selftest_parse_phandle_with_args(); + of_selftest_property_match_string(); pr_info("end of selftest - %s\n", selftest_passed ? "PASS" : "FAIL"); return 0; } |