> +static void fun_select_chip(struct mtd_info *mtd, int chip_nr)
> +{
> + struct nand_chip *chip = mtd->priv;
> + struct fsl_upm_nand *fun = to_fsl_upm_nand(mtd);
> +
> + if (chip_nr == -1) {
> + chip->cmd_ctrl(mtd, NAND_CMD_NONE, 0 |
> NAND_CTRL_CHANGE);
> + } else if (chip_nr >= 0) {
> + fun->chip_number = chip_nr;
> + chip->IO_ADDR_R = chip->IO_ADDR_W =
> + fun->io_base + chip_nr * fun->chip_offset;
> + } else {
> + BUG();
> + }
braces are not required here...
> + prop = of_get_property(ofdev->node, "num-chips", &size);
> + if (prop && size == sizeof(uint32_t)) {
> + fun->num_chips = *prop;
> + if (fun->num_chips >= NAND_MAX_CHIPS) {
> + dev_err(&ofdev->dev, "too much chips");
> + ret = -EINVAL;
> + goto err1;
> + }
> + } else {
> + fun->num_chips = 1;
> + }
ditto...
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