From 50018a752771efce3ae222457d4d231d1f80a1a5 Mon Sep 17 00:00:00 2001
From: Zoltan Herpai <wigyori@uid0.hu>
Date: Sun, 9 Aug 2015 12:25:18 +0000
Subject: sunxi: add support for 4.1
Signed-off-by: Zoltan HERPAI <wigyori@uid0.hu>
SVN-Revision: 46571
---
.../112-mtd-add-dt-nand-partition-parser.patch | 157 +++++++++++++++++++++
1 file changed, 157 insertions(+)
create mode 100644 target/linux/sunxi/patches-4.1/112-mtd-add-dt-nand-partition-parser.patch
(limited to 'target/linux/sunxi/patches-4.1/112-mtd-add-dt-nand-partition-parser.patch')
diff --git a/target/linux/sunxi/patches-4.1/112-mtd-add-dt-nand-partition-parser.patch b/target/linux/sunxi/patches-4.1/112-mtd-add-dt-nand-partition-parser.patch
new file mode 100644
index 0000000..135f50a
--- /dev/null
+++ b/target/linux/sunxi/patches-4.1/112-mtd-add-dt-nand-partition-parser.patch
@@ -0,0 +1,157 @@
+From 0460e9868fd82a3675db02f6ceb6edfd8501c194 Mon Sep 17 00:00:00 2001
+From: Boris BREZILLON <boris.brezillon@free-electrons.com>
+Date: Mon, 28 Jul 2014 14:31:42 +0200
+Subject: [PATCH] mtd: nand: Add DT NAND partition parser
+
+Add a of_nandpart_parse function to help parsing NAND partitions from DT.
+This function should be called from NAND controller drivers just after the
+nand_scan_tail in place of mtd_device_parse_register.
+The caller can specify a parser function to retrieve HW specific
+informations from the DT.
+
+Signed-off-by: Boris BREZILLON <boris.brezillon@free-electrons.com>
+Signed-off-by: Hans de Goede <hdegoede@redhat.com>
+---
+ drivers/mtd/nand/ofnandpart.c | 104 ++++++++++++++++++++++++++++++++++++++++++
+ include/linux/mtd/nand.h | 17 +++++++
+ 2 files changed, 121 insertions(+)
+ create mode 100644 drivers/mtd/nand/ofnandpart.c
+
+diff --git a/drivers/mtd/nand/ofnandpart.c b/drivers/mtd/nand/ofnandpart.c
+new file mode 100644
+index 0000000..293daee
+--- /dev/null
++++ b/drivers/mtd/nand/ofnandpart.c
+@@ -0,0 +1,104 @@
++/*
++ * NAND Flash partitions described by the OF (or flattened) device tree
++ *
++ * Copyright © 2014 Boris BREZILLON <b.brezillon.dev@gmail.com>
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of the GNU General Public License as published by the
++ * Free Software Foundation; either version 2 of the License, or (at your
++ * option) any later version.
++ */
++
++#include <linux/module.h>
++#include <linux/init.h>
++#include <linux/of.h>
++#include <linux/mtd/mtd.h>
++#include <linux/slab.h>
++#include <linux/mtd/nand.h>
++
++static inline bool node_has_compatible(struct device_node *pp)
++{
++ return of_get_property(pp, "compatible", NULL);
++}
++
++int ofnandpart_parse(struct mtd_info *master,
++ const struct ofnandpart_data *data)
++{
++ struct device_node *node;
++ const char *partname;
++ struct device_node *pp;
++ int i;
++
++ if (!data)
++ return 0;
++
++ node = data->node;
++ if (!node)
++ return 0;
++
++ i = 0;
++ for_each_child_of_node(node, pp) {
++ const __be32 *reg;
++ int len;
++ int a_cells, s_cells;
++ uint64_t offset, size;
++ uint32_t mask_flags = 0;
++ struct nand_part *part;
++
++ if (node_has_compatible(pp))
++ continue;
++
++ reg = of_get_property(pp, "reg", &len);
++ if (!reg)
++ continue;
++
++ a_cells = of_n_addr_cells(pp);
++ s_cells = of_n_size_cells(pp);
++ offset = of_read_number(reg, a_cells);
++ size = of_read_number(reg + a_cells, s_cells);
++
++ partname = of_get_property(pp, "label", &len);
++ if (!partname)
++ partname = of_get_property(pp, "name", &len);
++
++ if (of_get_property(pp, "read-only", &len))
++ mask_flags |= MTD_WRITEABLE;
++
++ if (of_get_property(pp, "lock", &len))
++ mask_flags |= MTD_POWERUP_LOCK;
++
++ if (data->parse)
++ part = data->parse(data->priv, master, pp);
++ else
++ part = nandpart_alloc();
++
++ if (IS_ERR(part))
++ continue;
++
++ part->offset = offset;
++ part->master = master;
++ part->mtd.name = partname;
++ part->mtd.size = size;
++ part->mtd.flags = mask_flags;
++
++ if (nand_add_partition(master, part)) {
++ if (part->release)
++ part->release(part);
++ continue;
++ }
++
++ i++;
++ }
++
++ if (!i) {
++ of_node_put(pp);
++ pr_err("No valid partition found on %s\n", node->full_name);
++ }
++
++ return i;
++}
++EXPORT_SYMBOL(ofnandpart_parse);
++
++MODULE_LICENSE("GPL");
++MODULE_DESCRIPTION("Parser for NAND flash partitioning information in device tree");
++MODULE_AUTHOR("Boris BREZILLON");
+diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h
+index 510e09b..5616f51 100644
+--- a/include/linux/mtd/nand.h
++++ b/include/linux/mtd/nand.h
+@@ -1013,6 +1013,23 @@ static inline int jedec_feature(struct nand_chip *chip)
+ : 0;
+ }
+
++/**
++ * struct ofnandpart_data - struct used to retrieve NAND partitions from a DT
++ * node
++ * @parse: driver specific parser function
++ * @priv: driver private data
++ * @node: OF node containing NAND partitions
++ */
++struct ofnandpart_data {
++ struct nand_part *(*parse)(void *priv, struct mtd_info *master,
++ struct device_node *pp);
++ void *priv;
++ struct device_node *node;
++};
++
++int ofnandpart_parse(struct mtd_info *master,
++ const struct ofnandpart_data *data);
++
+ /*
+ * struct nand_sdr_timings - SDR NAND chip timings
+ *
--
cgit v1.1