mirror of https://gitee.com/openkylin/linux.git
mtd: spi-nor: Introduce spi_nor_get_flash_info()
Dedicate a function for getting the pointer to the flash_info const struct. Trim a bit the spi_nor_scan() huge function. Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com> Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com> Reviewed-by: Vignesh Raghavendra <vigneshr@ti.com>
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@ -4767,10 +4767,50 @@ static int spi_nor_set_addr_width(struct spi_nor *nor)
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return 0;
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}
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static const struct flash_info *spi_nor_get_flash_info(struct spi_nor *nor,
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const char *name)
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{
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const struct flash_info *info = NULL;
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if (name)
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info = spi_nor_match_id(name);
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/* Try to auto-detect if chip name wasn't specified or not found */
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if (!info)
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info = spi_nor_read_id(nor);
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if (IS_ERR_OR_NULL(info))
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return ERR_PTR(-ENOENT);
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/*
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* If caller has specified name of flash model that can normally be
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* detected using JEDEC, let's verify it.
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*/
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if (name && info->id_len) {
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const struct flash_info *jinfo;
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jinfo = spi_nor_read_id(nor);
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if (IS_ERR(jinfo)) {
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return jinfo;
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} else if (jinfo != info) {
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/*
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* JEDEC knows better, so overwrite platform ID. We
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* can't trust partitions any longer, but we'll let
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* mtd apply them anyway, since some partitions may be
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* marked read-only, and we don't want to lose that
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* information, even if it's not 100% accurate.
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*/
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dev_warn(nor->dev, "found %s, expected %s\n",
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jinfo->name, info->name);
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info = jinfo;
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}
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}
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return info;
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}
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int spi_nor_scan(struct spi_nor *nor, const char *name,
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const struct spi_nor_hwcaps *hwcaps)
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{
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const struct flash_info *info = NULL;
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const struct flash_info *info;
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struct device *dev = nor->dev;
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struct mtd_info *mtd = &nor->mtd;
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struct device_node *np = spi_nor_get_flash_node(nor);
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@ -4801,37 +4841,9 @@ int spi_nor_scan(struct spi_nor *nor, const char *name,
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if (!nor->bouncebuf)
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return -ENOMEM;
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if (name)
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info = spi_nor_match_id(name);
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/* Try to auto-detect if chip name wasn't specified or not found */
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if (!info)
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info = spi_nor_read_id(nor);
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if (IS_ERR_OR_NULL(info))
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return -ENOENT;
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/*
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* If caller has specified name of flash model that can normally be
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* detected using JEDEC, let's verify it.
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*/
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if (name && info->id_len) {
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const struct flash_info *jinfo;
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jinfo = spi_nor_read_id(nor);
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if (IS_ERR(jinfo)) {
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return PTR_ERR(jinfo);
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} else if (jinfo != info) {
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/*
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* JEDEC knows better, so overwrite platform ID. We
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* can't trust partitions any longer, but we'll let
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* mtd apply them anyway, since some partitions may be
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* marked read-only, and we don't want to lose that
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* information, even if it's not 100% accurate.
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*/
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dev_warn(dev, "found %s, expected %s\n",
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jinfo->name, info->name);
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info = jinfo;
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}
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}
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info = spi_nor_get_flash_info(nor, name);
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if (IS_ERR(info))
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return PTR_ERR(info);
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nor->info = info;
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