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91 lines
2.5 KiB
Diff
91 lines
2.5 KiB
Diff
From 6b54054c4053215fe4add195c67daca9a466ba92 Mon Sep 17 00:00:00 2001
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From: "ying.zhang" <ying.zhang22455@nxp.com>
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Date: Fri, 23 Dec 2016 22:21:22 +0800
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Subject: [PATCH] mtd: extend physmap_of to let the device tree specify the
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parition probe
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This is to support custom partitioning schemes for embedded PPC. To use
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define your own mtd_part_parser and then add something like:
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linux,part-probe = "my_probe", "cmdlinepart";
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To the board's dts file.
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If linux,part-probe is not specified then this behaves the same as before.
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Signed-off-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
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Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
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---
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drivers/mtd/maps/physmap_of.c | 46 ++++++++++++++++++++++++++++++++++++++++-
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1 file changed, 45 insertions(+), 1 deletion(-)
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diff --git a/drivers/mtd/maps/physmap_of.c b/drivers/mtd/maps/physmap_of.c
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index fef1d1b..e46b4e9 100644
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--- a/drivers/mtd/maps/physmap_of.c
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+++ b/drivers/mtd/maps/physmap_of.c
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@@ -112,9 +112,47 @@ static struct mtd_info *obsolete_probe(struct platform_device *dev,
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static const char * const part_probe_types_def[] = {
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"cmdlinepart", "RedBoot", "ofpart", "ofoldpart", NULL };
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+static const char * const *of_get_probes(struct device_node *dp)
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+{
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+ const char *cp;
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+ int cplen;
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+ unsigned int l;
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+ unsigned int count;
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+ const char **res;
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+
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+ cp = of_get_property(dp, "linux,part-probe", &cplen);
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+ if (cp == NULL)
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+ return part_probe_types_def;
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+
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+ count = 0;
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+ for (l = 0; l != cplen; l++)
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+ if (cp[l] == 0)
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+ count++;
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+
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+ res = kzalloc((count + 1)*sizeof(*res), GFP_KERNEL);
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+ if (!res)
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+ return NULL;
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+ count = 0;
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+ while (cplen > 0) {
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+ res[count] = cp;
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+ l = strlen(cp) + 1;
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+ cp += l;
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+ cplen -= l;
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+ count++;
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+ }
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+ return res;
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+}
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+
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+static void of_free_probes(const char * const *probes)
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+{
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+ if (probes != part_probe_types_def)
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+ kfree(probes);
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+}
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+
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static const struct of_device_id of_flash_match[];
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static int of_flash_probe(struct platform_device *dev)
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{
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+ const char * const *part_probe_types;
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const struct of_device_id *match;
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struct device_node *dp = dev->dev.of_node;
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struct resource res;
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@@ -273,8 +311,14 @@ static int of_flash_probe(struct platform_device *dev)
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goto err_out;
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ppdata.of_node = dp;
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- mtd_device_parse_register(info->cmtd, part_probe_types_def, &ppdata,
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+ part_probe_types = of_get_probes(dp);
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+ if (!part_probe_types) {
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+ err = -ENOMEM;
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+ goto err_out;
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+ }
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+ mtd_device_parse_register(info->cmtd, part_probe_types, &ppdata,
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NULL, 0);
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+ of_free_probes(part_probe_types);
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kfree(mtd_list);
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--
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1.7.9.5
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