diff options
Diffstat (limited to 'target/linux/oxnas/patches-4.4/0073-of-mtd-prepare-helper-reading-NAND-ECC-algo-from-DT.patch')
| -rw-r--r-- | target/linux/oxnas/patches-4.4/0073-of-mtd-prepare-helper-reading-NAND-ECC-algo-from-DT.patch | 91 |
1 files changed, 0 insertions, 91 deletions
diff --git a/target/linux/oxnas/patches-4.4/0073-of-mtd-prepare-helper-reading-NAND-ECC-algo-from-DT.patch b/target/linux/oxnas/patches-4.4/0073-of-mtd-prepare-helper-reading-NAND-ECC-algo-from-DT.patch deleted file mode 100644 index aa45441afa..0000000000 --- a/target/linux/oxnas/patches-4.4/0073-of-mtd-prepare-helper-reading-NAND-ECC-algo-from-DT.patch +++ /dev/null @@ -1,91 +0,0 @@ -From 410a91f6efa1c4c3c4369d1dd2c31286749dff33 Mon Sep 17 00:00:00 2001 -From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <zajec5@gmail.com> -Date: Wed, 23 Mar 2016 11:19:01 +0100 -Subject: [PATCH 073/102] of: mtd: prepare helper reading NAND ECC algo from - DT -MIME-Version: 1.0 -Content-Type: text/plain; charset=UTF-8 -Content-Transfer-Encoding: 8bit - -NAND subsystem is being slightly reworked to store ECC details in -separated fields. In future we'll want to add support for more DT -properties as specifying every possible setup with a single -"nand-ecc-mode" is a pretty bad idea. -To allow this let's add a helper that will support something like -"nand-ecc-algo" in future. Right now we use it for keeping backward -compatibility. - -Signed-off-by: Rafał Miłecki <zajec5@gmail.com> -Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com> ---- - drivers/of/of_mtd.c | 36 ++++++++++++++++++++++++++++++++++++ - include/linux/of_mtd.h | 6 ++++++ - 2 files changed, 42 insertions(+) - ---- a/drivers/of/of_mtd.c -+++ b/drivers/of/of_mtd.c -@@ -50,6 +50,42 @@ int of_get_nand_ecc_mode(struct device_n - EXPORT_SYMBOL_GPL(of_get_nand_ecc_mode); - - /** -+ * of_get_nand_ecc_algo - Get nand ecc algorithm for given device_node -+ * @np: Pointer to the given device_node -+ * -+ * The function gets ecc algorithm and returns its enum value, or errno in error -+ * case. -+ */ -+int of_get_nand_ecc_algo(struct device_node *np) -+{ -+ const char *pm; -+ int err; -+ -+ /* -+ * TODO: Read ECC algo OF property and map it to enum nand_ecc_algo. -+ * It's not implemented yet as currently NAND subsystem ignores -+ * algorithm explicitly set this way. Once it's handled we should -+ * document & support new property. -+ */ -+ -+ /* -+ * For backward compatibility we also read "nand-ecc-mode" checking -+ * for some obsoleted values that were specifying ECC algorithm. -+ */ -+ err = of_property_read_string(np, "nand-ecc-mode", &pm); -+ if (err < 0) -+ return err; -+ -+ if (!strcasecmp(pm, "soft")) -+ return NAND_ECC_HAMMING; -+ else if (!strcasecmp(pm, "soft_bch")) -+ return NAND_ECC_BCH; -+ -+ return -ENODEV; -+} -+EXPORT_SYMBOL_GPL(of_get_nand_ecc_algo); -+ -+/** - * of_get_nand_ecc_step_size - Get ECC step size associated to - * the required ECC strength (see below). - * @np: Pointer to the given device_node ---- a/include/linux/of_mtd.h -+++ b/include/linux/of_mtd.h -@@ -13,6 +13,7 @@ - - #include <linux/of.h> - int of_get_nand_ecc_mode(struct device_node *np); -+int of_get_nand_ecc_algo(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_bus_width(struct device_node *np); -@@ -24,6 +25,11 @@ static inline int of_get_nand_ecc_mode(s - { - return -ENOSYS; - } -+ -+static inline int of_get_nand_ecc_algo(struct device_node *np) -+{ -+ return -ENOSYS; -+} - - static inline int of_get_nand_ecc_step_size(struct device_node *np) - { |