diff options
author | Jiri Kosina <jkosina@suse.cz> | 2010-08-10 13:22:08 +0200 |
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committer | Jiri Kosina <jkosina@suse.cz> | 2010-08-10 13:22:08 +0200 |
commit | fb8231a8b139035476f2a8aaac837d0099b66dad (patch) | |
tree | 2875806beb96ea0cdab292146767a5085721dc6a /drivers/of/base.c | |
parent | 426d31071ac476ea62c62656b242930c17b58c00 (diff) | |
parent | f6cec0ae58c17522a7bc4e2f39dae19f199ab534 (diff) |
Merge branch 'master' into for-next
Conflicts:
arch/arm/mach-omap1/board-nokia770.c
Diffstat (limited to 'drivers/of/base.c')
-rw-r--r-- | drivers/of/base.c | 76 |
1 files changed, 15 insertions, 61 deletions
diff --git a/drivers/of/base.c b/drivers/of/base.c index b5ad9740d8b..aa805250de7 100644 --- a/drivers/of/base.c +++ b/drivers/of/base.c @@ -545,74 +545,28 @@ struct device_node *of_find_matching_node(struct device_node *from, EXPORT_SYMBOL(of_find_matching_node); /** - * of_modalias_table: Table of explicit compatible ==> modalias mappings - * - * This table allows particulare compatible property values to be mapped - * to modalias strings. This is useful for busses which do not directly - * understand the OF device tree but are populated based on data contained - * within the device tree. SPI and I2C are the two current users of this - * table. - * - * In most cases, devices do not need to be listed in this table because - * the modalias value can be derived directly from the compatible table. - * However, if for any reason a value cannot be derived, then this table - * provides a method to override the implicit derivation. - * - * At the moment, a single table is used for all bus types because it is - * assumed that the data size is small and that the compatible values - * should already be distinct enough to differentiate between SPI, I2C - * and other devices. - */ -struct of_modalias_table { - char *of_device; - char *modalias; -}; -static struct of_modalias_table of_modalias_table[] = { - { "fsl,mcu-mpc8349emitx", "mcu-mpc8349emitx" }, - { "mmc-spi-slot", "mmc_spi" }, -}; - -/** * of_modalias_node - Lookup appropriate modalias for a device node * @node: pointer to a device tree node * @modalias: Pointer to buffer that modalias value will be copied into * @len: Length of modalias value * - * Based on the value of the compatible property, this routine will determine - * an appropriate modalias value for a particular device tree node. Two - * separate methods are attempted to derive a modalias value. + * Based on the value of the compatible property, this routine will attempt + * to choose an appropriate modalias value for a particular device tree node. + * It does this by stripping the manufacturer prefix (as delimited by a ',') + * from the first entry in the compatible list property. * - * First method is to lookup the compatible value in of_modalias_table. - * Second is to strip off the manufacturer prefix from the first - * compatible entry and use the remainder as modalias - * - * This routine returns 0 on success + * This routine returns 0 on success, <0 on failure. */ int of_modalias_node(struct device_node *node, char *modalias, int len) { - int i, cplen; - const char *compatible; - const char *p; - - /* 1. search for exception list entry */ - for (i = 0; i < ARRAY_SIZE(of_modalias_table); i++) { - compatible = of_modalias_table[i].of_device; - if (!of_device_is_compatible(node, compatible)) - continue; - strlcpy(modalias, of_modalias_table[i].modalias, len); - return 0; - } + const char *compatible, *p; + int cplen; compatible = of_get_property(node, "compatible", &cplen); - if (!compatible) + if (!compatible || strlen(compatible) > cplen) return -ENODEV; - - /* 2. take first compatible entry and strip manufacturer */ p = strchr(compatible, ','); - if (!p) - return -ENODEV; - p++; - strlcpy(modalias, p, len); + strlcpy(modalias, p ? p + 1 : compatible, len); return 0; } EXPORT_SYMBOL_GPL(of_modalias_node); @@ -651,14 +605,14 @@ EXPORT_SYMBOL(of_find_node_by_phandle); struct device_node * of_parse_phandle(struct device_node *np, const char *phandle_name, int index) { - const phandle *phandle; + const __be32 *phandle; int size; phandle = of_get_property(np, phandle_name, &size); if ((!phandle) || (size < sizeof(*phandle) * (index + 1))) return NULL; - return of_find_node_by_phandle(phandle[index]); + return of_find_node_by_phandle(be32_to_cpup(phandle + index)); } EXPORT_SYMBOL(of_parse_phandle); @@ -714,16 +668,16 @@ int of_parse_phandles_with_args(struct device_node *np, const char *list_name, while (list < list_end) { const __be32 *cells; - const phandle *phandle; + phandle phandle; - phandle = list++; + phandle = be32_to_cpup(list++); args = list; /* one cell hole in the list = <>; */ - if (!*phandle) + if (!phandle) goto next; - node = of_find_node_by_phandle(*phandle); + node = of_find_node_by_phandle(phandle); if (!node) { pr_debug("%s: could not find phandle\n", np->full_name); |