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SubjectRe: [PATCH v6 1/2] mtd: nand: add sunxi NAND flash controller support
On 10/20/2014 05:15 PM, Boris Brezillon wrote:
> Add support for the sunxi NAND Flash Controller (NFC).
>
(...)

> +
> +static int sunxi_nfc_dev_ready(struct mtd_info *mtd)
> +{
> + struct nand_chip *nand = mtd->priv;
> + struct sunxi_nand_chip *sunxi_nand = to_sunxi_nand(nand);
> + struct sunxi_nfc *nfc = to_sunxi_nfc(sunxi_nand->nand.controller);
> + struct sunxi_nand_rb *rb;
> + unsigned long timeo = (sunxi_nand->nand.state == FL_ERASING ? 400 : 20);
> + int ret;
> +
> + if (sunxi_nand->selected < 0)
> + return 0;
> +
> + rb = &sunxi_nand->sels[sunxi_nand->selected].rb;
> +
> + switch (rb->type) {
> + case RB_NATIVE:
> + ret = !!(readl(nfc->regs + NFC_REG_ST) &
> + (NFC_RB_STATE0 << rb->info.nativeid));
> + if (ret)
> + break;
> +
> + sunxi_nfc_wait_int(nfc, NFC_RB_B2R, timeo);
> + ret = !!(readl(nfc->regs + NFC_REG_ST) &
> + (NFC_RB_STATE0 << rb->info.nativeid));
> + break;
> + case RB_GPIO:
> + ret = gpio_get_value(rb->info.gpio);
> + break;
> + case RB_NONE:
> + default:
> + ret = 0;
> + pr_err("cannot check R/B NAND status!");

Missed terminating new line... :-)

> + break;
> + }
> +
> + return ret;
> +}
> +
> +

(...)

> +static struct platform_driver sunxi_nfc_driver = {
> + .driver = {
> + .name = "sunxi_nand",
> + .owner = THIS_MODULE,

This field updated by module_platform_driver()..

> + .of_match_table = sunxi_nfc_ids,
> + },
> + .probe = sunxi_nfc_probe,
> + .remove = sunxi_nfc_remove,
> +};
> +module_platform_driver(sunxi_nfc_driver);
> +
> +MODULE_LICENSE("GPL v2");
> +MODULE_AUTHOR("Boris BREZILLON");
> +MODULE_DESCRIPTION("Allwinner NAND Flash Controller driver");
> +MODULE_ALIAS("platform:sunxi_nand");

--
Regards,
Varka Bhadram.



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