From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from metis.ext.pengutronix.de ([2001:67c:670:201:290:27ff:fe1d:cc33]) by bombadil.infradead.org with esmtps (Exim 4.87 #1 (Red Hat Linux)) id 1ctpC4-0005Gc-6f for barebox@lists.infradead.org; Fri, 31 Mar 2017 05:33:56 +0000 From: Sascha Hauer Date: Fri, 31 Mar 2017 07:33:13 +0200 Message-Id: <20170331053323.17821-5-s.hauer@pengutronix.de> In-Reply-To: <20170331053323.17821-1-s.hauer@pengutronix.de> References: <20170331053323.17821-1-s.hauer@pengutronix.de> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "barebox" Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: [PATCH 04/14] mtd: of: Make used partition binding configurable To: Barebox List So far we used the legacy partition binding when fixing up the mtd partition nodes. Change this to default to the new binding with a "partitions" submode. Make this behaviour configurable though: This creates a new of_binding device variable for mtd devices. This can be set to: - "new": Use the new partition binding (default) - "legacy": Use the old partition binding - "donttouch": Do not touch the partition node Signed-off-by: Sascha Hauer --- drivers/of/partition.c | 84 ++++++++++++++++++++++++++++++++++++++++++++----- include/linux/mtd/mtd.h | 1 + 2 files changed, 78 insertions(+), 7 deletions(-) diff --git a/drivers/of/partition.c b/drivers/of/partition.c index 68f3812ed6..f4d6c3322c 100644 --- a/drivers/of/partition.c +++ b/drivers/of/partition.c @@ -23,6 +23,16 @@ #include #include #include +#include +#include + +static unsigned int of_partition_binding; + +enum of_binding_name { + MTD_OF_BINDING_NEW, + MTD_OF_BINDING_LEGACY, + MTD_OF_BINDING_DONTTOUCH, +}; struct cdev *of_parse_partition(struct cdev *cdev, struct device_node *node) { @@ -93,15 +103,36 @@ int of_parse_partitions(struct cdev *cdev, struct device_node *node) return 0; } +static void delete_subnodes(struct device_node *np) +{ + struct device_node *part, *tmp; + + for_each_child_of_node_safe(np, tmp, part) { + if (of_get_property(part, "compatible", NULL)) + continue; + + of_delete_node(part); + } +} + static int of_mtd_fixup(struct device_node *root, void *ctx) { struct cdev *cdev = ctx; struct mtd_info *mtd, *partmtd; - struct device_node *np, *part, *tmp; + struct device_node *np, *part, *partnode; int ret; + int n_cells; mtd = container_of(cdev, struct mtd_info, cdev); + if (of_partition_binding == MTD_OF_BINDING_DONTTOUCH) + return 0; + + if (mtd->size >= 0x100000000) + n_cells = 2; + else + n_cells = 1; + np = of_find_node_by_path_from(root, mtd->of_path); if (!np) { dev_err(&mtd->class_dev, "Cannot find nodepath %s, cannot fixup\n", @@ -109,12 +140,37 @@ static int of_mtd_fixup(struct device_node *root, void *ctx) return -EINVAL; } - for_each_child_of_node_safe(np, tmp, part) { - if (of_get_property(part, "compatible", NULL)) - continue; - of_delete_node(part); + partnode = of_get_child_by_name(np, "partitions"); + if (partnode) { + if (of_partition_binding == MTD_OF_BINDING_LEGACY) { + of_delete_node(partnode); + partnode = np; + } + delete_subnodes(partnode); + } else { + delete_subnodes(np); + + if (of_partition_binding == MTD_OF_BINDING_LEGACY) + partnode = np; + else + partnode = of_new_node(np, "partitions"); + } + + if (of_partition_binding == MTD_OF_BINDING_NEW) { + ret = of_property_write_string(partnode, "compatible", + "fixed-partitions"); + if (ret) + return ret; } + of_property_write_u32(partnode, "#size-cells", n_cells); + if (ret) + return ret; + + of_property_write_u32(partnode, "#addres-cells", n_cells); + if (ret) + return ret; + list_for_each_entry(partmtd, &mtd->partitions, partitions_entry) { int na, ns, len = 0; char *name = basprintf("partition@%0llx", @@ -125,7 +181,7 @@ static int of_mtd_fixup(struct device_node *root, void *ctx) if (!name) return -ENOMEM; - part = of_new_node(np, name); + part = of_new_node(partnode, name); free(name); if (!part) return -ENOMEM; @@ -160,4 +216,18 @@ static int of_mtd_fixup(struct device_node *root, void *ctx) int of_partitions_register_fixup(struct cdev *cdev) { return of_register_fixup(of_mtd_fixup, cdev); -} \ No newline at end of file +} + +static const char *of_binding_names[] = { + "new", "legacy", "donttouch" +}; + +static int of_partition_init(void) +{ + dev_add_param_enum(&global_device, "of_partition_binding", NULL, NULL, + &of_partition_binding, of_binding_names, + ARRAY_SIZE(of_binding_names), NULL); + + return 0; +} +device_initcall(of_partition_init); \ No newline at end of file diff --git a/include/linux/mtd/mtd.h b/include/linux/mtd/mtd.h index f93fac00f2..fa35c7ef39 100644 --- a/include/linux/mtd/mtd.h +++ b/include/linux/mtd/mtd.h @@ -228,6 +228,7 @@ struct mtd_info { struct list_head partitions_entry; char *of_path; + unsigned int of_binding; }; int mtd_erase(struct mtd_info *mtd, struct erase_info *instr); -- 2.11.0 _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox