diff options
Diffstat (limited to 'target/linux/sunxi/patches-4.1/115-mtd-fetch-randomizer-mode.patch')
| -rw-r--r-- | target/linux/sunxi/patches-4.1/115-mtd-fetch-randomizer-mode.patch | 84 |
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; |