diff options
author | Jamie Lentin <jm@lentin.co.uk> | 2012-04-18 10:06:41 (GMT) |
---|---|---|
committer | Jason Cooper <jason@lakedaemon.net> | 2012-05-15 02:29:11 (GMT) |
commit | a0fabf722c9dc73a3eed24ce166476ddb00eda1e (patch) | |
tree | 1a7aec13bc1eee977cb2e5fbeaa0f9540aab5b84 /drivers/mtd/nand/orion_nand.c | |
parent | 9007d1007317658d5b32bda9f59c797c59ce4d47 (diff) | |
download | linux-fsl-qoriq-a0fabf722c9dc73a3eed24ce166476ddb00eda1e.tar.xz |
mtd: Add orion_nand devicetree bindings
Allow a NAND chip using the orion_nand driver to be described using devicetree.
Changes since last submission (V4) [Addressing comments by]:-
* WARN when bank-width is out of range [Andrew Lunn]
Changes since last submission (V3):-
* Document all parameters [Grant Likely]
* Convert bank-width to be in bytes
* Add explicit defaults for cle, ale and bank-width
Signed-off-by: Jamie Lentin <jm@lentin.co.uk>
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
Diffstat (limited to 'drivers/mtd/nand/orion_nand.c')
-rw-r--r-- | drivers/mtd/nand/orion_nand.c | 47 |
1 files changed, 44 insertions, 3 deletions
diff --git a/drivers/mtd/nand/orion_nand.c b/drivers/mtd/nand/orion_nand.c index 1d3bfb2..0f50ef3 100644 --- a/drivers/mtd/nand/orion_nand.c +++ b/drivers/mtd/nand/orion_nand.c @@ -13,6 +13,7 @@ #include <linux/slab.h> #include <linux/module.h> #include <linux/platform_device.h> +#include <linux/of.h> #include <linux/mtd/mtd.h> #include <linux/mtd/nand.h> #include <linux/mtd/partitions.h> @@ -74,11 +75,13 @@ static void orion_nand_read_buf(struct mtd_info *mtd, uint8_t *buf, int len) static int __init orion_nand_probe(struct platform_device *pdev) { struct mtd_info *mtd; + struct mtd_part_parser_data ppdata = {}; struct nand_chip *nc; struct orion_nand_data *board; struct resource *res; void __iomem *io_base; int ret = 0; + u32 val = 0; nc = kzalloc(sizeof(struct nand_chip) + sizeof(struct mtd_info), GFP_KERNEL); if (!nc) { @@ -101,7 +104,32 @@ static int __init orion_nand_probe(struct platform_device *pdev) goto no_res; } - board = pdev->dev.platform_data; + if (pdev->dev.of_node) { + board = devm_kzalloc(&pdev->dev, sizeof(struct orion_nand_data), + GFP_KERNEL); + if (!board) { + printk(KERN_ERR "orion_nand: failed to allocate board structure.\n"); + ret = -ENOMEM; + goto no_res; + } + if (!of_property_read_u32(pdev->dev.of_node, "cle", &val)) + board->cle = (u8)val; + else + board->cle = 0; + if (!of_property_read_u32(pdev->dev.of_node, "ale", &val)) + board->ale = (u8)val; + else + board->ale = 1; + if (!of_property_read_u32(pdev->dev.of_node, + "bank-width", &val)) + board->width = (u8)val * 8; + else + board->width = 8; + if (!of_property_read_u32(pdev->dev.of_node, + "chip-delay", &val)) + board->chip_delay = (u8)val; + } else + board = pdev->dev.platform_data; mtd->priv = nc; mtd->owner = THIS_MODULE; @@ -115,6 +143,10 @@ static int __init orion_nand_probe(struct platform_device *pdev) if (board->chip_delay) nc->chip_delay = board->chip_delay; + WARN(board->width > 16, + "%d bit bus width out of range", + board->width); + if (board->width == 16) nc->options |= NAND_BUSWIDTH_16; @@ -129,8 +161,9 @@ static int __init orion_nand_probe(struct platform_device *pdev) } mtd->name = "orion_nand"; - ret = mtd_device_parse_register(mtd, NULL, NULL, board->parts, - board->nr_parts); + ppdata.of_node = pdev->dev.of_node; + ret = mtd_device_parse_register(mtd, NULL, &ppdata, + board->parts, board->nr_parts); if (ret) { nand_release(mtd); goto no_dev; @@ -161,11 +194,19 @@ static int __devexit orion_nand_remove(struct platform_device *pdev) return 0; } +#ifdef CONFIG_OF +static struct of_device_id orion_nand_of_match_table[] = { + { .compatible = "mrvl,orion-nand", }, + {}, +}; +#endif + static struct platform_driver orion_nand_driver = { .remove = __devexit_p(orion_nand_remove), .driver = { .name = "orion_nand", .owner = THIS_MODULE, + .of_match_table = of_match_ptr(orion_nand_of_match_table), }, }; |