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-rw-r--r--target/linux/sunxi/patches-4.1/115-mtd-fetch-randomizer-mode.patch84
1 files changed, 84 insertions, 0 deletions
diff --git a/target/linux/sunxi/patches-4.1/115-mtd-fetch-randomizer-mode.patch b/target/linux/sunxi/patches-4.1/115-mtd-fetch-randomizer-mode.patch
new file mode 100644
index 0000000000..f4c36ec56c
--- /dev/null
+++ b/target/linux/sunxi/patches-4.1/115-mtd-fetch-randomizer-mode.patch
@@ -0,0 +1,84 @@
+From eb7f9115409710732ebc4dfe1be629252280910e Mon Sep 17 00:00:00 2001
+From: Boris BREZILLON <boris.brezillon@free-electrons.com>
+Date: Mon, 28 Jul 2014 14:47:04 +0200
+Subject: [PATCH] of: mtd: Add NAND randomizer mode retrieval
+
+Add a of_get_nand_rnd_mode() helper function.
+
+Signed-off-by: Boris BREZILLON <boris.brezillon@free-electrons.com>
+Signed-off-by: Hans de Goede <hdegoede@redhat.com>
+---
+ drivers/of/of_mtd.c | 35 +++++++++++++++++++++++++++++++++++
+ include/linux/of_mtd.h | 6 ++++++
+ 2 files changed, 41 insertions(+)
+
+diff --git a/drivers/of/of_mtd.c b/drivers/of/of_mtd.c
+index b7361ed..4e42c26 100644
+--- a/drivers/of/of_mtd.c
++++ b/drivers/of/of_mtd.c
+@@ -84,6 +84,41 @@ int of_get_nand_ecc_strength(struct device_node *np)
+ EXPORT_SYMBOL_GPL(of_get_nand_ecc_strength);
+
+ /**
++ * It maps 'enum nand_rnd_modes_t' found in include/linux/mtd/nand.h
++ * into the device tree binding of 'nand-rnd', so that MTD
++ * device driver can get nand rnd from device tree.
++ */
++static const char *nand_rnd_modes[] = {
++ [NAND_RND_NONE] = "none",
++ [NAND_RND_SOFT] = "soft",
++ [NAND_RND_HW] = "hw",
++};
++
++/**
++ * of_get_nand_rnd_mode - Get nand randomizer mode for given device_node
++ * @np: Pointer to the given device_node
++ *
++ * The function gets randomizer mode string from property 'nand-rnd-mode',
++ * and return its index in nand_rnd_modes table, or errno in error case.
++ */
++int of_get_nand_rnd_mode(struct device_node *np)
++{
++ const char *pm;
++ int err, i;
++
++ err = of_property_read_string(np, "nand-rnd-mode", &pm);
++ if (err < 0)
++ return err;
++
++ for (i = 0; i < ARRAY_SIZE(nand_rnd_modes); i++)
++ if (!strcasecmp(pm, nand_rnd_modes[i]))
++ return i;
++
++ return -ENODEV;
++}
++EXPORT_SYMBOL_GPL(of_get_nand_rnd_mode);
++
++/**
+ * of_get_nand_bus_width - Get nand bus witdh for given device_node
+ * @np: Pointer to the given device_node
+ *
+diff --git a/include/linux/of_mtd.h b/include/linux/of_mtd.h
+index e266caa..1059472 100644
+--- a/include/linux/of_mtd.h
++++ b/include/linux/of_mtd.h
+@@ -15,6 +15,7 @@
+ int of_get_nand_ecc_mode(struct device_node *np);
+ int of_get_nand_ecc_step_size(struct device_node *np);
+ int of_get_nand_ecc_strength(struct device_node *np);
++int of_get_nand_rnd_mode(struct device_node *np);
+ int of_get_nand_bus_width(struct device_node *np);
+ bool of_get_nand_on_flash_bbt(struct device_node *np);
+
+@@ -35,6 +36,11 @@ static inline int of_get_nand_ecc_strength(struct device_node *np)
+ return -ENOSYS;
+ }
+
++static inline int of_get_nand_rnd_mode(struct device_node *np)
++{
++ return -ENOSYS;
++}
++
+ static inline int of_get_nand_bus_width(struct device_node *np)
+ {
+ return -ENOSYS;