ARM: OMAP2+: nand: bch capability check
Capability of bch schemes could be discovered using soc revision checks. If soc revision indicates that selected ecc scheme is not supported bail out. Signed-off-by: Afzal Mohammed <afzal@ti.com>
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@ -90,6 +90,27 @@ static int omap2_nand_gpmc_retime(
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return 0;
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return 0;
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}
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}
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static bool __init gpmc_hwecc_bch_capable(enum omap_ecc ecc_opt)
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{
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/* support only OMAP3 class */
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if (!cpu_is_omap34xx()) {
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pr_err("BCH ecc is not supported on this CPU\n");
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return 0;
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}
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/*
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* For now, assume 4-bit mode is only supported on OMAP3630 ES1.x, x>=1.
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* Other chips may be added if confirmed to work.
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*/
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if ((ecc_opt == OMAP_ECC_BCH4_CODE_HW) &&
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(!cpu_is_omap3630() || (GET_OMAP_REVISION() == 0))) {
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pr_err("BCH 4-bit mode is not supported on this CPU\n");
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return 0;
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}
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return 1;
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}
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int __init gpmc_nand_init(struct omap_nand_platform_data *gpmc_nand_data,
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int __init gpmc_nand_init(struct omap_nand_platform_data *gpmc_nand_data,
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struct gpmc_timings *gpmc_t)
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struct gpmc_timings *gpmc_t)
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{
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{
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@ -128,6 +149,9 @@ int __init gpmc_nand_init(struct omap_nand_platform_data *gpmc_nand_data,
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gpmc_update_nand_reg(&gpmc_nand_data->reg, gpmc_nand_data->cs);
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gpmc_update_nand_reg(&gpmc_nand_data->reg, gpmc_nand_data->cs);
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if (!gpmc_hwecc_bch_capable(gpmc_nand_data->ecc_opt))
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return -EINVAL;
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err = platform_device_register(&gpmc_nand_device);
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err = platform_device_register(&gpmc_nand_device);
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if (err < 0) {
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if (err < 0) {
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dev_err(dev, "Unable to register NAND device\n");
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dev_err(dev, "Unable to register NAND device\n");
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