linux-kernel - Re: s3c24xx nand: add command line partition table parsing support (resend)

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Message-ID: <5767b9100809180858r3bb9952el3bc76dab18930713@mail.gmail.com>
Date:	Thu, 18 Sep 2008 23:58:14 +0800
From:	"Conke Hu" <conke.hu@...il.com>
To:	"Russell King - ARM Linux" <linux@....linux.org.uk>
Cc:	Linux-arm-kernel@...ts.arm.linux.org.uk,
	"Ben Dooks" <ben-linux@...ff.org>,
	"Linux Kernel Mailing List" <linux-kernel@...r.kernel.org>
Subject: Re: s3c24xx nand: add command line partition table parsing support (resend)

Add mtd id and  command line partition table parsing support for
s3c24xx nand driver.

Signed-off-by: Conke Hu <conke.hu@...il.com>
Signed-off-by: Linke Wang <linke.wang@...il.com>
------------------
diff --git a/drivers/mtd/nand/s3c2410.c b/drivers/mtd/nand/s3c2410.c
index 556139e..db0d331 100644
--- a/drivers/mtd/nand/s3c2410.c
+++ b/drivers/mtd/nand/s3c2410.c
@@ -48,6 +48,8 @@
 #include <asm/plat-s3c/regs-nand.h>
 #include <asm/plat-s3c/nand.h>

+#define S3C_NAND_NAME_LEN 16
+
 #ifdef CONFIG_MTD_NAND_S3C2410_HWECC
 static int hardware_ecc = 1;
 #else
@@ -60,6 +62,9 @@ static int clock_stop = 1;
 static const int clock_stop = 0;
 #endif

+#ifdef CONFIG_MTD_PARTITIONS
+static const char *s3c_part_probes[] = {"cmdlinepart", NULL};
+#endif

 /* new oob placement block for use with hardware ecc generation
  */
@@ -80,6 +85,7 @@ struct s3c2410_nand_mtd {
 	struct s3c2410_nand_set		*set;
 	struct s3c2410_nand_info	*info;
 	int				scan_res;
+	char			name[S3C_NAND_NAME_LEN];
 };

 enum s3c_cpu_type {
@@ -649,6 +655,15 @@ static int s3c2410_nand_add_partition(struct
s3c2410_nand_info *info,
 				      struct s3c2410_nand_mtd *mtd,
 				      struct s3c2410_nand_set *set)
 {
+#ifdef CONFIG_MTD_CMDLINE_PARTS
+	int nr_parts;
+	struct mtd_partition *partitions;
+
+	nr_parts = parse_mtd_partitions(&mtd->mtd, s3c_part_probes, &partitions, 0);
+	if (nr_parts > 0 && partitions != NULL)
+		return add_mtd_partitions(&mtd->mtd, partitions, nr_parts);
+#endif
+
 	if (set == NULL)
 		return add_mtd_device(&mtd->mtd);

@@ -892,6 +907,9 @@ static int s3c24xx_nand_probe(struct platform_device *pdev,
 	for (setno = 0; setno < nr_sets; setno++, nmtd++) {
 		pr_debug("initialising set %d (%p, info %p)\n", setno, nmtd, info);

+		snprintf(nmtd->name, sizeof(nmtd->name), "s3c_nand%d", setno);
+		nmtd->mtd.name = nmtd->name;
+
 		s3c2410_nand_init_chip(info, nmtd, sets);

 		nmtd->scan_res = nand_scan_ident(&nmtd->mtd,
--
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