From patchwork Mon Feb 9 23:31:18 2009 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Subject: mtd: Allow platform to set partitions at runtime Date: Mon, 09 Feb 2009 13:31:18 -0000 From: hartleys X-Patchwork-Id: 22838 Message-Id: To: Add a callback to allow platform to initialize the static partitions. Static partitions on a nand device could vary depending on the size of the device. This patch allows an optional platform callback to be used to setup this partition information at runtime. Scan order is: 1) chip.part_probe_types 2) chip.set_parts 3) chip.partitions 4) full mtd device (fallback for no partitions) Some of the existing nand drivers could possibly be replaced by the plat_nand driver by using this patch. These include autcpu12.c and ts7250.c drivers. Signed-off-by: H Hartley Sweeten --- struct platform_nand_chip { @@ -574,6 +575,8 @@ struct platform_nand_chip { int chip_delay; unsigned int options; const char **part_probe_types; + void (*set_parts)(uint64_t size, + struct platform_nand_chip *chip); void *priv; }; diff --git a/drivers/mtd/nand/plat_nand.c b/drivers/mtd/nand/plat_nand.c index 75f9f48..f10b5a6 100644 --- a/drivers/mtd/nand/plat_nand.c +++ b/drivers/mtd/nand/plat_nand.c @@ -86,6 +86,8 @@ static int __init plat_nand_probe(struct platform_device *pdev) return 0; } } + if (pdata->chip.set_parts) + pdata->chip.set_parts(data->mtd.size, &pdata->chip); if (pdata->chip.partitions) { data->parts = pdata->chip.partitions; res = add_mtd_partitions(&data->mtd, data->parts, diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h index db5b63d..4eaf328 100644 --- a/include/linux/mtd/nand.h +++ b/include/linux/mtd/nand.h @@ -563,6 +563,7 @@ extern int nand_do_read(struct mtd_info *mtd, loff_t from, size_t len, * @options: Option flags, e.g. 16bit buswidth * @ecclayout: ecc layout info structure * @part_probe_types: NULL-terminated array of probe types + * @set_parts: platform specific function to set partitions * @priv: hardware controller specific settings */