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authorLinus Torvalds <torvalds@linux-foundation.org>2014-04-07 10:17:30 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2014-04-07 10:17:30 -0700
commitc29aa153ef0469cddf0146d41ce6494bd76be78b (patch)
treeb49af4e6cf54e9988dd45640a86c4de7f49ddf6d /drivers/of
parent2b3a8fd735f86ebeb2b9d061054003000c36b654 (diff)
parent4a4163caccae97a23d97c29032664ee7b7a498d0 (diff)
downloadlinux-c29aa153ef0469cddf0146d41ce6494bd76be78b.tar.bz2
Merge tag 'for-linus-20140405' of git://git.infradead.org/linux-mtd
Pull MTD updates from Brian Norris: - A few SPI NOR ID definitions - Kill the NAND "max pagesize" restriction - Fix some x16 bus-width NAND support - Add NAND JEDEC parameter page support - DT bindings for NAND ECC - GPMI NAND updates (subpage reads) - More OMAP NAND refactoring - New STMicro SPI NOR driver (now in 40 patches!) - A few other random bugfixes * tag 'for-linus-20140405' of git://git.infradead.org/linux-mtd: (120 commits) Fix index regression in nand_read_subpage mtd: diskonchip: mem resource name is not optional mtd: nand: fix mention to CONFIG_MTD_NAND_ECC_BCH mtd: nand: fix GET/SET_FEATURES address on 16-bit devices mtd: omap2: Use devm_ioremap_resource() mtd: denali_dt: Use devm_ioremap_resource() mtd: devices: elm: update DRIVER_NAME as "omap-elm" mtd: devices: elm: configure parallel channels based on ecc_steps mtd: devices: elm: clean elm_load_syndrome mtd: devices: elm: check for hardware engine's design constraints mtd: st_spi_fsm: Succinctly reorganise .remove() mtd: st_spi_fsm: Allow loop to run at least once before giving up CPU mtd: st_spi_fsm: Correct vendor name spelling issue - missing "M" mtd: st_spi_fsm: Avoid duplicating MTD core code mtd: st_spi_fsm: Remove useless consts from function arguments mtd: st_spi_fsm: Convert ST SPI FSM (NOR) Flash driver to new DT partitions mtd: st_spi_fsm: Move runtime configurable msg sequences into device's struct mtd: st_spi_fsm: Supply the W25Qxxx chip specific configuration call-back mtd: st_spi_fsm: Supply the S25FLxxx chip specific configuration call-back mtd: st_spi_fsm: Supply the MX25xxx chip specific configuration call-back ...
Diffstat (limited to 'drivers/of')
-rw-r--r--drivers/of/of_mtd.c34
1 files changed, 34 insertions, 0 deletions
diff --git a/drivers/of/of_mtd.c b/drivers/of/of_mtd.c
index a27ec94877e4..b7361ed70537 100644
--- a/drivers/of/of_mtd.c
+++ b/drivers/of/of_mtd.c
@@ -50,6 +50,40 @@ int of_get_nand_ecc_mode(struct device_node *np)
EXPORT_SYMBOL_GPL(of_get_nand_ecc_mode);
/**
+ * 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
+ *
+ * return the ECC step size, or errno in error case.
+ */
+int of_get_nand_ecc_step_size(struct device_node *np)
+{
+ int ret;
+ u32 val;
+
+ ret = of_property_read_u32(np, "nand-ecc-step-size", &val);
+ return ret ? ret : val;
+}
+EXPORT_SYMBOL_GPL(of_get_nand_ecc_step_size);
+
+/**
+ * of_get_nand_ecc_strength - Get required ECC strength over the
+ * correspnding step size as defined by 'nand-ecc-size'
+ * @np: Pointer to the given device_node
+ *
+ * return the ECC strength, or errno in error case.
+ */
+int of_get_nand_ecc_strength(struct device_node *np)
+{
+ int ret;
+ u32 val;
+
+ ret = of_property_read_u32(np, "nand-ecc-strength", &val);
+ return ret ? ret : val;
+}
+EXPORT_SYMBOL_GPL(of_get_nand_ecc_strength);
+
+/**
* of_get_nand_bus_width - Get nand bus witdh for given device_node
* @np: Pointer to the given device_node
*