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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