diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2010-08-05 18:57:35 -0400 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-08-05 18:57:35 -0400 |
commit | 03c0c29aff7e56b722eb6c47eace222b140d0377 (patch) | |
tree | 47267a19b523159cf36a050ef3c35f4dbdb33016 /drivers/of/base.c | |
parent | c60c6a96b7bb0f1f8bb635fdfcf5b592aaf062b4 (diff) | |
parent | 7fb8f881c54beb05dd4d2c947dada1c636581d87 (diff) |
Merge branch 'next-devicetree' of git://git.secretlab.ca/git/linux-2.6
* 'next-devicetree' of git://git.secretlab.ca/git/linux-2.6: (63 commits)
of/platform: Register of_platform_drivers with an "of:" prefix
of/address: Clean up function declarations
of/spi: call of_register_spi_devices() from spi core code
of: Provide default of_node_to_nid() implementation.
of/device: Make of_device_make_bus_id() usable by other code.
of/irq: Fix endian issues in parsing interrupt specifiers
of: Fix phandle endian issues
of/flattree: fix of_flat_dt_is_compatible() to match the full compatible string
of: remove of_default_bus_ids
of: make of_find_device_by_node generic
microblaze: remove references to of_device and to_of_device
sparc: remove references to of_device and to_of_device
powerpc: remove references to of_device and to_of_device
of/device: Replace of_device with platform_device in includes and core code
of/device: Protect against binding of_platform_drivers to non-OF devices
of: remove asm/of_device.h
of: remove asm/of_platform.h
of/platform: remove all of_bus_type and of_platform_bus_type references
of: Merge of_platform_bus_type with platform_bus_type
drivercore/of: Add OF style matching to platform bus
...
Fix up trivial conflicts in arch/microblaze/kernel/Makefile due to just
some obj-y removals by the devicetree branch, while the microblaze
updates added a new file.
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 b5ad9740d8b2..aa805250de76 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, | |||
545 | EXPORT_SYMBOL(of_find_matching_node); | 545 | EXPORT_SYMBOL(of_find_matching_node); |
546 | 546 | ||
547 | /** | 547 | /** |
548 | * of_modalias_table: Table of explicit compatible ==> modalias mappings | ||
549 | * | ||
550 | * This table allows particulare compatible property values to be mapped | ||
551 | * to modalias strings. This is useful for busses which do not directly | ||
552 | * understand the OF device tree but are populated based on data contained | ||
553 | * within the device tree. SPI and I2C are the two current users of this | ||
554 | * table. | ||
555 | * | ||
556 | * In most cases, devices do not need to be listed in this table because | ||
557 | * the modalias value can be derived directly from the compatible table. | ||
558 | * However, if for any reason a value cannot be derived, then this table | ||
559 | * provides a method to override the implicit derivation. | ||
560 | * | ||
561 | * At the moment, a single table is used for all bus types because it is | ||
562 | * assumed that the data size is small and that the compatible values | ||
563 | * should already be distinct enough to differentiate between SPI, I2C | ||
564 | * and other devices. | ||
565 | */ | ||
566 | struct of_modalias_table { | ||
567 | char *of_device; | ||
568 | char *modalias; | ||
569 | }; | ||
570 | static struct of_modalias_table of_modalias_table[] = { | ||
571 | { "fsl,mcu-mpc8349emitx", "mcu-mpc8349emitx" }, | ||
572 | { "mmc-spi-slot", "mmc_spi" }, | ||
573 | }; | ||
574 | |||
575 | /** | ||
576 | * of_modalias_node - Lookup appropriate modalias for a device node | 548 | * of_modalias_node - Lookup appropriate modalias for a device node |
577 | * @node: pointer to a device tree node | 549 | * @node: pointer to a device tree node |
578 | * @modalias: Pointer to buffer that modalias value will be copied into | 550 | * @modalias: Pointer to buffer that modalias value will be copied into |
579 | * @len: Length of modalias value | 551 | * @len: Length of modalias value |
580 | * | 552 | * |
581 | * Based on the value of the compatible property, this routine will determine | 553 | * Based on the value of the compatible property, this routine will attempt |
582 | * an appropriate modalias value for a particular device tree node. Two | 554 | * to choose an appropriate modalias value for a particular device tree node. |
583 | * separate methods are attempted to derive a modalias value. | 555 | * It does this by stripping the manufacturer prefix (as delimited by a ',') |
556 | * from the first entry in the compatible list property. | ||
584 | * | 557 | * |
585 | * First method is to lookup the compatible value in of_modalias_table. | 558 | * This routine returns 0 on success, <0 on failure. |
586 | * Second is to strip off the manufacturer prefix from the first | ||
587 | * compatible entry and use the remainder as modalias | ||
588 | * | ||
589 | * This routine returns 0 on success | ||
590 | */ | 559 | */ |
591 | int of_modalias_node(struct device_node *node, char *modalias, int len) | 560 | int of_modalias_node(struct device_node *node, char *modalias, int len) |
592 | { | 561 | { |
593 | int i, cplen; | 562 | const char *compatible, *p; |
594 | const char *compatible; | 563 | int cplen; |
595 | const char *p; | ||
596 | |||
597 | /* 1. search for exception list entry */ | ||
598 | for (i = 0; i < ARRAY_SIZE(of_modalias_table); i++) { | ||
599 | compatible = of_modalias_table[i].of_device; | ||
600 | if (!of_device_is_compatible(node, compatible)) | ||
601 | continue; | ||
602 | strlcpy(modalias, of_modalias_table[i].modalias, len); | ||
603 | return 0; | ||
604 | } | ||
605 | 564 | ||
606 | compatible = of_get_property(node, "compatible", &cplen); | 565 | compatible = of_get_property(node, "compatible", &cplen); |
607 | if (!compatible) | 566 | if (!compatible || strlen(compatible) > cplen) |
608 | return -ENODEV; | 567 | return -ENODEV; |
609 | |||
610 | /* 2. take first compatible entry and strip manufacturer */ | ||
611 | p = strchr(compatible, ','); | 568 | p = strchr(compatible, ','); |
612 | if (!p) | 569 | strlcpy(modalias, p ? p + 1 : compatible, len); |
613 | return -ENODEV; | ||
614 | p++; | ||
615 | strlcpy(modalias, p, len); | ||
616 | return 0; | 570 | return 0; |
617 | } | 571 | } |
618 | EXPORT_SYMBOL_GPL(of_modalias_node); | 572 | EXPORT_SYMBOL_GPL(of_modalias_node); |
@@ -651,14 +605,14 @@ EXPORT_SYMBOL(of_find_node_by_phandle); | |||
651 | struct device_node * | 605 | struct device_node * |
652 | of_parse_phandle(struct device_node *np, const char *phandle_name, int index) | 606 | of_parse_phandle(struct device_node *np, const char *phandle_name, int index) |
653 | { | 607 | { |
654 | const phandle *phandle; | 608 | const __be32 *phandle; |
655 | int size; | 609 | int size; |
656 | 610 | ||
657 | phandle = of_get_property(np, phandle_name, &size); | 611 | phandle = of_get_property(np, phandle_name, &size); |
658 | if ((!phandle) || (size < sizeof(*phandle) * (index + 1))) | 612 | if ((!phandle) || (size < sizeof(*phandle) * (index + 1))) |
659 | return NULL; | 613 | return NULL; |
660 | 614 | ||
661 | return of_find_node_by_phandle(phandle[index]); | 615 | return of_find_node_by_phandle(be32_to_cpup(phandle + index)); |
662 | } | 616 | } |
663 | EXPORT_SYMBOL(of_parse_phandle); | 617 | EXPORT_SYMBOL(of_parse_phandle); |
664 | 618 | ||
@@ -714,16 +668,16 @@ int of_parse_phandles_with_args(struct device_node *np, const char *list_name, | |||
714 | 668 | ||
715 | while (list < list_end) { | 669 | while (list < list_end) { |
716 | const __be32 *cells; | 670 | const __be32 *cells; |
717 | const phandle *phandle; | 671 | phandle phandle; |
718 | 672 | ||
719 | phandle = list++; | 673 | phandle = be32_to_cpup(list++); |
720 | args = list; | 674 | args = list; |
721 | 675 | ||
722 | /* one cell hole in the list = <>; */ | 676 | /* one cell hole in the list = <>; */ |
723 | if (!*phandle) | 677 | if (!phandle) |
724 | goto next; | 678 | goto next; |
725 | 679 | ||
726 | node = of_find_node_by_phandle(*phandle); | 680 | node = of_find_node_by_phandle(phandle); |
727 | if (!node) { | 681 | if (!node) { |
728 | pr_debug("%s: could not find phandle\n", | 682 | pr_debug("%s: could not find phandle\n", |
729 | np->full_name); | 683 | np->full_name); |