mtd: core: Don't fail mtd_otp_nvmem_add() if OTP is unsupported
Handle the case where -EOPNOTSUPP is returned from OTP driver. This addresses an issue that occurs with the Intel SPI flash controller, which has a limited supported opcode set. Whilst the OTP functionality is not available due to this restriction, other parts of the MTD functionality of the device are intact. This change allows the driver to gracefully handle the restriction by allowing the supported functionality to remain available instead of failing the probe altogether. Signed-off-by: Aapo Vienamo <aapo.vienamo@linux.intel.com> Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com> Reviewed-by: Michael Walle <mwalle@kernel.org> Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com> Link: https://lore.kernel.org/linux-mtd/20240313173425.1325790-3-aapo.vienamo@linux.intel.com
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@ -1014,7 +1014,11 @@ static int mtd_otp_nvmem_add(struct mtd_info *mtd)
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err:
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nvmem_unregister(mtd->otp_user_nvmem);
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return dev_err_probe(dev, err, "Failed to register OTP NVMEM device\n");
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/* Don't report error if OTP is not supported. */
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if (err != -EOPNOTSUPP)
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return dev_err_probe(dev, err,
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"Failed to register OTP NVMEM device\n");
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return 0;
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}
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/**
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