forked from luck/tmp_suning_uos_patched
mtd: nand: move of_get_nand_xxx() helpers into nand_base.c
Now that all drivers go through nand_set_flash_node() to parse the generic NAND properties, we can move all of_get_nand_xxx() helpers in to nand_base.c, make them static and remove of_mtd.c and of_mtd.h. Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
This commit is contained in:
Boris Brezillon
parent
14667d8d58
commit
d48f62b9a0
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@ -45,7 +45,7 @@
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#include <linux/bitops.h>
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#include <linux/io.h>
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#include <linux/mtd/partitions.h>
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#include <linux/of_mtd.h>
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#include <linux/of.h>
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static int nand_get_device(struct mtd_info *mtd, int new_state);
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@ -3971,6 +3971,98 @@ static struct nand_flash_dev *nand_get_flash_type(struct mtd_info *mtd,
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return type;
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}
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static const char * const nand_ecc_modes[] = {
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[NAND_ECC_NONE] = "none",
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[NAND_ECC_SOFT] = "soft",
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[NAND_ECC_HW] = "hw",
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[NAND_ECC_HW_SYNDROME] = "hw_syndrome",
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[NAND_ECC_HW_OOB_FIRST] = "hw_oob_first",
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[NAND_ECC_SOFT_BCH] = "soft_bch",
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};
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static int of_get_nand_ecc_mode(struct device_node *np)
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{
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const char *pm;
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int err, i;
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err = of_property_read_string(np, "nand-ecc-mode", &pm);
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if (err < 0)
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return err;
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for (i = 0; i < ARRAY_SIZE(nand_ecc_modes); i++)
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if (!strcasecmp(pm, nand_ecc_modes[i]))
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return i;
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return -ENODEV;
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}
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static int of_get_nand_ecc_algo(struct device_node *np)
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{
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const char *pm;
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int err;
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/*
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* TODO: Read ECC algo OF property and map it to enum nand_ecc_algo.
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* It's not implemented yet as currently NAND subsystem ignores
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* algorithm explicitly set this way. Once it's handled we should
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* document & support new property.
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*/
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/*
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* For backward compatibility we also read "nand-ecc-mode" checking
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* for some obsoleted values that were specifying ECC algorithm.
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*/
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err = of_property_read_string(np, "nand-ecc-mode", &pm);
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if (err < 0)
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return err;
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if (!strcasecmp(pm, "soft"))
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return NAND_ECC_HAMMING;
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else if (!strcasecmp(pm, "soft_bch"))
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return NAND_ECC_BCH;
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return -ENODEV;
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}
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static int of_get_nand_ecc_step_size(struct device_node *np)
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{
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int ret;
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u32 val;
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ret = of_property_read_u32(np, "nand-ecc-step-size", &val);
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return ret ? ret : val;
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}
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static int of_get_nand_ecc_strength(struct device_node *np)
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{
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int ret;
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u32 val;
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ret = of_property_read_u32(np, "nand-ecc-strength", &val);
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return ret ? ret : val;
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}
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static int of_get_nand_bus_width(struct device_node *np)
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{
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u32 val;
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if (of_property_read_u32(np, "nand-bus-width", &val))
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return 8;
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switch (val) {
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case 8:
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case 16:
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return val;
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default:
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return -EIO;
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}
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}
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static bool of_get_nand_on_flash_bbt(struct device_node *np)
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{
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return of_property_read_bool(np, "nand-on-flash-bbt");
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}
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static int nand_dt_init(struct nand_chip *chip)
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{
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struct device_node *dn = nand_get_flash_node(chip);
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@ -10,7 +10,6 @@ obj-$(CONFIG_OF_UNITTEST) += unittest.o
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obj-$(CONFIG_OF_MDIO) += of_mdio.o
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obj-$(CONFIG_OF_PCI) += of_pci.o
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obj-$(CONFIG_OF_PCI_IRQ) += of_pci_irq.o
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obj-$(CONFIG_OF_MTD) += of_mtd.o
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obj-$(CONFIG_OF_RESERVED_MEM) += of_reserved_mem.o
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obj-$(CONFIG_OF_RESOLVE) += resolver.o
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obj-$(CONFIG_OF_OVERLAY) += overlay.o
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@ -1,155 +0,0 @@
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/*
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* Copyright 2012 Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
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*
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* OF helpers for mtd.
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*
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* This file is released under the GPLv2
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*
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*/
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#include <linux/kernel.h>
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#include <linux/of_mtd.h>
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#include <linux/mtd/nand.h>
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#include <linux/export.h>
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/**
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* It maps 'enum nand_ecc_modes_t' found in include/linux/mtd/nand.h
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* into the device tree binding of 'nand-ecc', so that MTD
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* device driver can get nand ecc from device tree.
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*/
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static const char *nand_ecc_modes[] = {
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[NAND_ECC_NONE] = "none",
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[NAND_ECC_SOFT] = "soft",
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[NAND_ECC_HW] = "hw",
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[NAND_ECC_HW_SYNDROME] = "hw_syndrome",
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[NAND_ECC_HW_OOB_FIRST] = "hw_oob_first",
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[NAND_ECC_SOFT_BCH] = "soft_bch",
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};
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/**
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* of_get_nand_ecc_mode - Get nand ecc mode for given device_node
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* @np: Pointer to the given device_node
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*
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* The function gets ecc mode string from property 'nand-ecc-mode',
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* and return its index in nand_ecc_modes table, or errno in error case.
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*/
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int of_get_nand_ecc_mode(struct device_node *np)
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{
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const char *pm;
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int err, i;
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err = of_property_read_string(np, "nand-ecc-mode", &pm);
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if (err < 0)
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return err;
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for (i = 0; i < ARRAY_SIZE(nand_ecc_modes); i++)
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if (!strcasecmp(pm, nand_ecc_modes[i]))
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return i;
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return -ENODEV;
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}
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EXPORT_SYMBOL_GPL(of_get_nand_ecc_mode);
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/**
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* of_get_nand_ecc_algo - Get nand ecc algorithm for given device_node
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* @np: Pointer to the given device_node
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*
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* The function gets ecc algorithm and returns its enum value, or errno in error
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* case.
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*/
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int of_get_nand_ecc_algo(struct device_node *np)
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{
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const char *pm;
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int err;
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/*
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* TODO: Read ECC algo OF property and map it to enum nand_ecc_algo.
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* It's not implemented yet as currently NAND subsystem ignores
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* algorithm explicitly set this way. Once it's handled we should
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* document & support new property.
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*/
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/*
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* For backward compatibility we also read "nand-ecc-mode" checking
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* for some obsoleted values that were specifying ECC algorithm.
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*/
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err = of_property_read_string(np, "nand-ecc-mode", &pm);
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if (err < 0)
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return err;
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if (!strcasecmp(pm, "soft"))
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return NAND_ECC_HAMMING;
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else if (!strcasecmp(pm, "soft_bch"))
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return NAND_ECC_BCH;
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return -ENODEV;
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}
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EXPORT_SYMBOL_GPL(of_get_nand_ecc_algo);
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/**
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* of_get_nand_ecc_step_size - Get ECC step size associated to
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* the required ECC strength (see below).
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* @np: Pointer to the given device_node
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*
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* return the ECC step size, or errno in error case.
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*/
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int of_get_nand_ecc_step_size(struct device_node *np)
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{
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int ret;
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u32 val;
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ret = of_property_read_u32(np, "nand-ecc-step-size", &val);
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return ret ? ret : val;
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}
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EXPORT_SYMBOL_GPL(of_get_nand_ecc_step_size);
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/**
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* of_get_nand_ecc_strength - Get required ECC strength over the
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* correspnding step size as defined by 'nand-ecc-size'
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* @np: Pointer to the given device_node
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*
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* return the ECC strength, or errno in error case.
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*/
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int of_get_nand_ecc_strength(struct device_node *np)
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{
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int ret;
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u32 val;
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ret = of_property_read_u32(np, "nand-ecc-strength", &val);
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return ret ? ret : val;
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}
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EXPORT_SYMBOL_GPL(of_get_nand_ecc_strength);
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/**
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* of_get_nand_bus_width - Get nand bus witdh for given device_node
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* @np: Pointer to the given device_node
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*
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* return bus width option, or errno in error case.
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*/
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int of_get_nand_bus_width(struct device_node *np)
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{
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u32 val;
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if (of_property_read_u32(np, "nand-bus-width", &val))
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return 8;
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switch(val) {
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case 8:
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case 16:
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return val;
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default:
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return -EIO;
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}
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}
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EXPORT_SYMBOL_GPL(of_get_nand_bus_width);
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/**
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* of_get_nand_on_flash_bbt - Get nand on flash bbt for given device_node
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* @np: Pointer to the given device_node
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*
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* return true if present false other wise
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*/
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bool of_get_nand_on_flash_bbt(struct device_node *np)
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{
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return of_property_read_bool(np, "nand-on-flash-bbt");
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}
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EXPORT_SYMBOL_GPL(of_get_nand_on_flash_bbt);
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@ -1,56 +0,0 @@
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/*
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* Copyright 2012 Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
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*
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* OF helpers for mtd.
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*
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* This file is released under the GPLv2
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*/
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#ifndef __LINUX_OF_MTD_H
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#define __LINUX_OF_MTD_H
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#ifdef CONFIG_OF_MTD
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#include <linux/of.h>
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int of_get_nand_ecc_mode(struct device_node *np);
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int of_get_nand_ecc_algo(struct device_node *np);
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int of_get_nand_ecc_step_size(struct device_node *np);
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int of_get_nand_ecc_strength(struct device_node *np);
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int of_get_nand_bus_width(struct device_node *np);
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bool of_get_nand_on_flash_bbt(struct device_node *np);
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#else /* CONFIG_OF_MTD */
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static inline int of_get_nand_ecc_mode(struct device_node *np)
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{
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return -ENOSYS;
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}
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static inline int of_get_nand_ecc_algo(struct device_node *np)
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{
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return -ENOSYS;
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}
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static inline int of_get_nand_ecc_step_size(struct device_node *np)
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{
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return -ENOSYS;
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}
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static inline int of_get_nand_ecc_strength(struct device_node *np)
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{
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return -ENOSYS;
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}
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static inline int of_get_nand_bus_width(struct device_node *np)
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{
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return -ENOSYS;
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}
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static inline bool of_get_nand_on_flash_bbt(struct device_node *np)
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{
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return false;
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}
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#endif /* CONFIG_OF_MTD */
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#endif /* __LINUX_OF_MTD_H */
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