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ath79: ar934x-nand: add kernel 5.10 compatibility

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Adapt the driver to make it work with the NAND subsystem changes between
kernel 5.4 and 5.10.

Tested-on: Aerohive HiveAP121

Signed-off-by: David Bauer <mail@david-bauer.net>
This commit is contained in:
David Bauer 2021-02-17 22:12:43 +01:00
parent da55758cc5
commit fb64e2c30f
1 changed files with 30 additions and 0 deletions
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30
target/linux/ath79/files/drivers/mtd/nand/raw/ar934x_nand.c
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@ -14,6 +14,9 @@
#include <linux/module.h>
#include <linux/dma-mapping.h>
#include <linux/mtd/mtd.h>
#if LINUX_VERSION_CODE >= KERNEL_VERSION(5,9,0)
#include <linux/mtd/nand.h>
#endif
#include <linux/mtd/rawnand.h>
#include <linux/mtd/partitions.h>
#include <linux/platform_device.h>
@ -719,7 +722,11 @@ static void ar934x_nfc_cmdfunc(struct nand_chip *nand, unsigned int command,
break;
case NAND_CMD_PAGEPROG:
#if LINUX_VERSION_CODE >= KERNEL_VERSION(5,9,0)
if (nand->ecc.engine_type == NAND_ECC_ENGINE_TYPE_ON_HOST) {
#else
if (nand->ecc.mode == NAND_ECC_HW) {
#endif
/* the data is already written */
break;
}
@ -1325,15 +1332,29 @@ static int ar934x_nfc_attach_chip(struct nand_chip *nand)
if (ret)
return ret;
#if LINUX_VERSION_CODE >= KERNEL_VERSION(5,9,0)
if (nand->ecc.engine_type == NAND_ECC_ENGINE_TYPE_ON_HOST) {
#else
if (nand->ecc.mode == NAND_ECC_HW) {
#endif
ret = ar934x_nfc_setup_hwecc(nfc);
if (ret)
return ret;
#if LINUX_VERSION_CODE >= KERNEL_VERSION(5,9,0)
} else if (nand->ecc.engine_type == NAND_ECC_ENGINE_TYPE_SOFT) {
dev_err(dev, "unknown ECC mode %d\n", nand->ecc.engine_type);
#else
} else if (nand->ecc.mode != NAND_ECC_SOFT) {
dev_err(dev, "unknown ECC mode %d\n", nand->ecc.mode);
#endif
return -EINVAL;
#if LINUX_VERSION_CODE >= KERNEL_VERSION(5,9,0)
} else if ((nand->ecc.algo != NAND_ECC_ALGO_BCH) &&
(nand->ecc.algo != NAND_ECC_ALGO_HAMMING)) {
#else
} else if ((nand->ecc.algo != NAND_ECC_BCH) &&
(nand->ecc.algo != NAND_ECC_HAMMING)) {
#endif
dev_err(dev, "unknown software ECC algo %d\n", nand->ecc.algo);
return -EINVAL;
}
@ -1422,7 +1443,11 @@ static int ar934x_nfc_probe(struct platform_device *pdev)
nand->legacy.read_byte = ar934x_nfc_read_byte;
nand->legacy.write_buf = ar934x_nfc_write_buf;
nand->legacy.read_buf = ar934x_nfc_read_buf;
#if LINUX_VERSION_CODE >= KERNEL_VERSION(5,9,0)
nand->ecc.engine_type = NAND_ECC_ENGINE_TYPE_ON_HOST; /* default */
#else
nand->ecc.mode = NAND_ECC_HW; /* default */
#endif
nand->priv = nfc;
platform_set_drvdata(pdev, nfc);
@ -1462,7 +1487,12 @@ static int ar934x_nfc_remove(struct platform_device *pdev)
nfc = platform_get_drvdata(pdev);
if (nfc) {
#if LINUX_VERSION_CODE >= KERNEL_VERSION(5,8,0)
mtd_device_unregister(nand_to_mtd(&nfc->nand_chip));
nand_cleanup(&nfc->nand_chip);
#else
nand_release(&nfc->nand_chip);
#endif
ar934x_nfc_free_buf(nfc);
}