OpenWrt – Blame information for rev 4
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1 | office | 1 | From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <zajec5@gmail.com> |
2 | Subject: [PATCH] mtd: spi-nor: detect JEDEC incompatible w25q128 using 0x90 |
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3 | command |
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4 | MIME-Version: 1.0 |
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5 | Content-Type: text/plain; charset=UTF-8 |
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6 | Content-Transfer-Encoding: 8bit |
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7 | |||
8 | Some w25q128 chipsets don't support RDID (0x9f) command, they reply with |
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9 | 0xff-s only. To suppose such flashes fallback to the 0x90 command. |
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10 | |||
11 | Signed-off-by: Rafał Miłecki <zajec5@gmail.com> |
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12 | --- |
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13 | |||
14 | --- a/drivers/mtd/spi-nor/spi-nor.c |
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15 | +++ b/drivers/mtd/spi-nor/spi-nor.c |
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16 | @@ -1295,6 +1295,18 @@ static const struct flash_info *spi_nor_ |
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17 | } |
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18 | dev_err(nor->dev, "unrecognized JEDEC id bytes: %02x, %02x, %02x\n", |
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19 | id[0], id[1], id[2]); |
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20 | + |
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21 | + tmp = nor->read_reg(nor, 0x90, id, SPI_NOR_MAX_ID_LEN); |
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22 | + if (tmp < 0) { |
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23 | + dev_dbg(nor->dev, " error %d reading JEDEC ID\n", tmp); |
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24 | + return ERR_PTR(tmp); |
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25 | + } |
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26 | + dev_info(nor->dev, "using Read Manufacturer / Device ID command (0x%02x) returned %02x %02x\n", |
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27 | + 0x90, id[0x03], id[0x04]); |
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28 | + if (id[0x03] == 0xef && id[0x04] == 0x17) { |
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29 | + return spi_nor_match_id("w25q128"); |
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30 | + } |
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31 | + |
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32 | return ERR_PTR(-ENODEV); |
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33 | } |
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34 |