You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
81 lines
2.4 KiB
Diff
81 lines
2.4 KiB
Diff
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(+)
|
|
|
|
--- a/drivers/of/of_mtd.c
|
|
+++ b/drivers/of/of_mtd.c
|
|
@@ -84,6 +84,41 @@ int of_get_nand_ecc_strength(struct devi
|
|
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
|
|
*
|
|
--- 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);
|
|
|
|
@@ -34,6 +35,11 @@ static inline int of_get_nand_ecc_streng
|
|
{
|
|
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)
|
|
{
|