Merge tag 'mtd/for-5.13' of git://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux

Pull mtd updates from Miquel Raynal:
 "MTD core:
   - Handle possible -EPROBE_DEFER from parse_mtd_partitions()
   - Constify buf in mtd_write_user_prot_reg()
   - Constify name param in mtd_bdi_init
   - Fix fall-through warnings for Clang
   - Get rid of Big MTD Lock ouf of mtdchar
   - Drop mtd_mutex usage from mtdchar_open()
   - Don't lock when recursively deleting partitions
   - Use module_mtd_blktrans() to register driver when relevant
   - Parse MTD as NVMEM cells
   - New OTP (one-time-programmable) erase ioctl
   - Require write permissions for locking and badblock ioctls
   - physmap:
      - Fix error return code of physmap_flash_remove()
      - physmap-bt1-rom: Fix unintentional stack access
   - ofpart parser:
      - Support Linksys Northstar partitions
      - Make symbol 'bcm4908_partitions_quirks' static
      - Limit parsing of deprecated DT syntax
      - Support BCM4908 fixed partitions
   - Qcom parser:
      - Incompatible with spi-nor 4k sectors
      - Fix error condition
      - Extend Qcom SMEM parser to SPI flash

  CFI:
   - Disable broken buffered writes for CFI chips within ID 0x2201
   - Address a Coverity report for unused value

  SPI NOR core:
   - Add OTP support
   - Fix module unload while an op in progress
   - Add various cleanup patches
   - Add Michael and Pratyush as designated reviewers in MAINTAINERS

  SPI NOR controller drivers:
   - intel-spi:
      - Move platform data header to x86 subfolder

  NAND core:
   - Fix error handling in nand_prog_page_op() (x2)
   - Add a helper to retrieve the number of ECC bytes per step
   - Add a helper to retrieve the number of ECC steps
   - Let ECC engines advertize the exact number of steps
   - ECC Hamming:
      - Populate the public nsteps field
      - Use the public nsteps field
   - ECC BCH:
      - Populate the public nsteps field
      - Use the public nsteps field

  Raw NAND core:
   - Add support for secure regions in NAND memory
   - Try not to use the ECC private structures
   - Remove duplicate include in rawnand.h
   - BBT:
      - Skip bad blocks when searching for the BBT in NAND (APPLIED THEN REVERTED)

  Raw NAND controller drivers:
   - Qcom:
      - Convert bindings to YAML
      - Use dma_mapping_error() for error check
      - Add missing nand_cleanup() in error path
      - Return actual error code instead of -ENODEV
      - Update last code word register
      - Add helper to configure location register
      - Rename parameter name in macro
      - Add helper to check last code word
      - Convert nandc to chip in Read/Write helper
      - Update register macro name for 0x2c offset
   - GPMI:
      - Fix a double free in gpmi_nand_init
   - Rockchip:
      - Use flexible-array member instead of zero-length array
   - Atmel:
      - Update ecc_stats.corrected counter
   - MXC:
      - Remove unneeded of_match_ptr()
   - R852:
      - replace spin_lock_irqsave by spin_lock in hard IRQ
   - Brcmnand:
      - Move to polling in pio mode on oops write
      - Read/write oob during EDU transfer
      - Fix OOB R/W with Hamming ECC
   - FSMC:
      - Fix error code in fsmc_nand_probe()
   - OMAP:
      - Use ECC information from the generic structures

  SPI-NAND core:
   - Add missing MODULE_DEVICE_TABLE()

  SPI-NAND drivers:
   - gigadevice: Support GD5F1GQ5UExxG"

* tag 'mtd/for-5.13' of git://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux: (89 commits)
  Revert "mtd: rawnand: bbt: Skip bad blocks when searching for the BBT in NAND"
  mtd: core: Constify buf in mtd_write_user_prot_reg()
  Revert "mtd: spi-nor: macronix: Add support for mx25l51245g"
  mtd: spi-nor: core: Fix an issue of releasing resources during read/write
  mtd: cfi_cmdset_0002: remove redundant assignment to variable timeo
  mtd: cfi_cmdset_0002: Disable buffered writes for AMD chip 0x2201
  mtd: rawnand: qcom: Use dma_mapping_error() for error check
  mtd: rawnand: gpmi: Fix a double free in gpmi_nand_init
  mtd: rawnand: qcom: Add missing nand_cleanup() in error path
  mtd: rawnand: Add support for secure regions in NAND memory
  dt-bindings: mtd: Add a property to declare secure regions in NAND chips
  dt-bindings: mtd: Convert Qcom NANDc binding to YAML
  mtd: spi-nor: winbond: add OTP support to w25q32fw/jw
  mtd: spi-nor: implement OTP support for Winbond and similar flashes
  mtd: spi-nor: add OTP support
  mtd: spi-nor: swp: Improve code around spi_nor_check_lock_status_sr()
  mtd: spi-nor: Move Software Write Protection logic out of the core
  mtd: rawnand: bbt: Skip bad blocks when searching for the BBT in NAND
  include: linux: mtd: Remove duplicate include of nand.h
  mtd: parsers: ofpart: support Linksys Northstar partitions
  ...

1 files changed, 271 insertions, 0 deletions

diff --git a/drivers/mtd/parsers/ofpart_core.c b/drivers/mtd/parsers/ofpart_core.c
new file mode 100644
index 000000000000..0fd8d2a0db97
--- /dev/null
+++ b/drivers/mtd/parsers/ofpart_core.c
@@ -0,0 +1,271 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Flash partitions described by the OF (or flattened) device tree
+ *
+ * Copyright © 2006 MontaVista Software Inc.
+ * Author: Vitaly Wool <vwool@ru.mvista.com>
+ *
+ * Revised to handle newer style flash binding by:
+ *   Copyright © 2007 David Gibson, IBM Corporation.
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/of.h>
+#include <linux/mtd/mtd.h>
+#include <linux/slab.h>
+#include <linux/mtd/partitions.h>
+
+#include "ofpart_bcm4908.h"
+#include "ofpart_linksys_ns.h"
+
+struct fixed_partitions_quirks {
+	int (*post_parse)(struct mtd_info *mtd, struct mtd_partition *parts, int nr_parts);
+};
+
+static struct fixed_partitions_quirks bcm4908_partitions_quirks = {
+	.post_parse = bcm4908_partitions_post_parse,
+};
+
+static struct fixed_partitions_quirks linksys_ns_partitions_quirks = {
+	.post_parse = linksys_ns_partitions_post_parse,
+};
+
+static const struct of_device_id parse_ofpart_match_table[];
+
+static bool node_has_compatible(struct device_node *pp)
+{
+	return of_get_property(pp, "compatible", NULL);
+}
+
+static int parse_fixed_partitions(struct mtd_info *master,
+				  const struct mtd_partition **pparts,
+				  struct mtd_part_parser_data *data)
+{
+	const struct fixed_partitions_quirks *quirks;
+	const struct of_device_id *of_id;
+	struct mtd_partition *parts;
+	struct device_node *mtd_node;
+	struct device_node *ofpart_node;
+	const char *partname;
+	struct device_node *pp;
+	int nr_parts, i, ret = 0;
+	bool dedicated = true;
+
+	/* Pull of_node from the master device node */
+	mtd_node = mtd_get_of_node(master);
+	if (!mtd_node)
+		return 0;
+
+	ofpart_node = of_get_child_by_name(mtd_node, "partitions");
+	if (!ofpart_node && !master->parent) {
+		/*
+		 * We might get here even when ofpart isn't used at all (e.g.,
+		 * when using another parser), so don't be louder than
+		 * KERN_DEBUG
+		 */
+		pr_debug("%s: 'partitions' subnode not found on %pOF. Trying to parse direct subnodes as partitions.\n",
+			 master->name, mtd_node);
+		ofpart_node = mtd_node;
+		dedicated = false;
+	}
+	if (!ofpart_node)
+		return 0;
+
+	of_id = of_match_node(parse_ofpart_match_table, ofpart_node);
+	if (dedicated && !of_id) {
+		/* The 'partitions' subnode might be used by another parser */
+		return 0;
+	}
+
+	quirks = of_id ? of_id->data : NULL;
+
+	/* First count the subnodes */
+	nr_parts = 0;
+	for_each_child_of_node(ofpart_node,  pp) {
+		if (!dedicated && node_has_compatible(pp))
+			continue;
+
+		nr_parts++;
+	}
+
+	if (nr_parts == 0)
+		return 0;
+
+	parts = kcalloc(nr_parts, sizeof(*parts), GFP_KERNEL);
+	if (!parts)
+		return -ENOMEM;
+
+	i = 0;
+	for_each_child_of_node(ofpart_node,  pp) {
+		const __be32 *reg;
+		int len;
+		int a_cells, s_cells;
+
+		if (!dedicated && node_has_compatible(pp))
+			continue;
+
+		reg = of_get_property(pp, "reg", &len);
+		if (!reg) {
+			if (dedicated) {
+				pr_debug("%s: ofpart partition %pOF (%pOF) missing reg property.\n",
+					 master->name, pp,
+					 mtd_node);
+				goto ofpart_fail;
+			} else {
+				nr_parts--;
+				continue;
+			}
+		}
+
+		a_cells = of_n_addr_cells(pp);
+		s_cells = of_n_size_cells(pp);
+		if (len / 4 != a_cells + s_cells) {
+			pr_debug("%s: ofpart partition %pOF (%pOF) error parsing reg property.\n",
+				 master->name, pp,
+				 mtd_node);
+			goto ofpart_fail;
+		}
+
+		parts[i].offset = of_read_number(reg, a_cells);
+		parts[i].size = of_read_number(reg + a_cells, s_cells);
+		parts[i].of_node = pp;
+
+		partname = of_get_property(pp, "label", &len);
+		if (!partname)
+			partname = of_get_property(pp, "name", &len);
+		parts[i].name = partname;
+
+		if (of_get_property(pp, "read-only", &len))
+			parts[i].mask_flags |= MTD_WRITEABLE;
+
+		if (of_get_property(pp, "lock", &len))
+			parts[i].mask_flags |= MTD_POWERUP_LOCK;
+
+		if (of_property_read_bool(pp, "slc-mode"))
+			parts[i].add_flags |= MTD_SLC_ON_MLC_EMULATION;
+
+		i++;
+	}
+
+	if (!nr_parts)
+		goto ofpart_none;
+
+	if (quirks && quirks->post_parse)
+		quirks->post_parse(master, parts, nr_parts);
+
+	*pparts = parts;
+	return nr_parts;
+
+ofpart_fail:
+	pr_err("%s: error parsing ofpart partition %pOF (%pOF)\n",
+	       master->name, pp, mtd_node);
+	ret = -EINVAL;
+ofpart_none:
+	of_node_put(pp);
+	kfree(parts);
+	return ret;
+}
+
+static const struct of_device_id parse_ofpart_match_table[] = {
+	/* Generic */
+	{ .compatible = "fixed-partitions" },
+	/* Customized */
+	{ .compatible = "brcm,bcm4908-partitions", .data = &bcm4908_partitions_quirks, },
+	{ .compatible = "linksys,ns-partitions", .data = &linksys_ns_partitions_quirks, },
+	{},
+};
+MODULE_DEVICE_TABLE(of, parse_ofpart_match_table);
+
+static struct mtd_part_parser ofpart_parser = {
+	.parse_fn = parse_fixed_partitions,
+	.name = "fixed-partitions",
+	.of_match_table = parse_ofpart_match_table,
+};
+
+static int parse_ofoldpart_partitions(struct mtd_info *master,
+				      const struct mtd_partition **pparts,
+				      struct mtd_part_parser_data *data)
+{
+	struct mtd_partition *parts;
+	struct device_node *dp;
+	int i, plen, nr_parts;
+	const struct {
+		__be32 offset, len;
+	} *part;
+	const char *names;
+
+	/* Pull of_node from the master device node */
+	dp = mtd_get_of_node(master);
+	if (!dp)
+		return 0;
+
+	part = of_get_property(dp, "partitions", &plen);
+	if (!part)
+		return 0; /* No partitions found */
+
+	pr_warn("Device tree uses obsolete partition map binding: %pOF\n", dp);
+
+	nr_parts = plen / sizeof(part[0]);
+
+	parts = kcalloc(nr_parts, sizeof(*parts), GFP_KERNEL);
+	if (!parts)
+		return -ENOMEM;
+
+	names = of_get_property(dp, "partition-names", &plen);
+
+	for (i = 0; i < nr_parts; i++) {
+		parts[i].offset = be32_to_cpu(part->offset);
+		parts[i].size   = be32_to_cpu(part->len) & ~1;
+		/* bit 0 set signifies read only partition */
+		if (be32_to_cpu(part->len) & 1)
+			parts[i].mask_flags = MTD_WRITEABLE;
+
+		if (names && (plen > 0)) {
+			int len = strlen(names) + 1;
+
+			parts[i].name = names;
+			plen -= len;
+			names += len;
+		} else {
+			parts[i].name = "unnamed";
+		}
+
+		part++;
+	}
+
+	*pparts = parts;
+	return nr_parts;
+}
+
+static struct mtd_part_parser ofoldpart_parser = {
+	.parse_fn = parse_ofoldpart_partitions,
+	.name = "ofoldpart",
+};
+
+static int __init ofpart_parser_init(void)
+{
+	register_mtd_parser(&ofpart_parser);
+	register_mtd_parser(&ofoldpart_parser);
+	return 0;
+}
+
+static void __exit ofpart_parser_exit(void)
+{
+	deregister_mtd_parser(&ofpart_parser);
+	deregister_mtd_parser(&ofoldpart_parser);
+}
+
+module_init(ofpart_parser_init);
+module_exit(ofpart_parser_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Parser for MTD partitioning information in device tree");
+MODULE_AUTHOR("Vitaly Wool, David Gibson");
+/*
+ * When MTD core cannot find the requested parser, it tries to load the module
+ * with the same name. Since we provide the ofoldpart parser, we should have
+ * the corresponding alias.
+ */
+MODULE_ALIAS("fixed-partitions");
+MODULE_ALIAS("ofoldpart");