github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-05-23 14:42:08 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

mtd: rawnand: sunxi: Precompute the ECC_CTL register value

Browse Source 
The value computed by this function never changes for a given chip.
Compute the whole register value once up front, instead of every time
the ECC engine is enabled.

Signed-off-by: Samuel Holland <samuel@sholland.org>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20230204143520.9682-4-samuel@sholland.org
This commit is contained in:
Samuel Holland 2023-02-04 08:35:20 -06:00 committed by Miquel Raynal
parent ac1c7072e3
commit ef3e6327ff
1 changed files with 10 additions and 17 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

27
drivers/mtd/nand/raw/sunxi_nand.c
View File

@ -172,10 +172,10 @@ struct sunxi_nand_chip_sel {
/**
* struct sunxi_nand_hw_ecc - stores information related to HW ECC support
*
* @mode: the sunxi ECC mode field deduced from ECC requirements
* @ecc_ctl: ECC_CTL register value for this NAND chip
*/
struct sunxi_nand_hw_ecc {
int mode;
u32 ecc_ctl;
};
/**
@ -689,26 +689,15 @@ static void sunxi_nfc_hw_ecc_enable(struct nand_chip *nand)
{
struct sunxi_nand_chip *sunxi_nand = to_sunxi_nand(nand);
struct sunxi_nfc *nfc = to_sunxi_nfc(nand->controller);
u32 ecc_ctl;
ecc_ctl = readl(nfc->regs + NFC_REG_ECC_CTL);
ecc_ctl &= ~(NFC_ECC_MODE_MSK | NFC_ECC_PIPELINE |
NFC_ECC_BLOCK_SIZE_MSK);
ecc_ctl |= NFC_ECC_EN | NFC_ECC_MODE(sunxi_nand->ecc.mode) |
NFC_ECC_EXCEPTION | NFC_ECC_PIPELINE;
if (nand->ecc.size == 512)
ecc_ctl |= NFC_ECC_BLOCK_512;
writel(ecc_ctl, nfc->regs + NFC_REG_ECC_CTL);
writel(sunxi_nand->ecc.ecc_ctl, nfc->regs + NFC_REG_ECC_CTL);
}
static void sunxi_nfc_hw_ecc_disable(struct nand_chip *nand)
{
struct sunxi_nfc *nfc = to_sunxi_nfc(nand->controller);
writel(readl(nfc->regs + NFC_REG_ECC_CTL) & ~NFC_ECC_EN,
nfc->regs + NFC_REG_ECC_CTL);
writel(0, nfc->regs + NFC_REG_ECC_CTL);
}
static inline void sunxi_nfc_user_data_to_buf(u32 user_data, u8 *buf)
@ -1693,8 +1682,6 @@ static int sunxi_nand_hw_ecc_ctrl_init(struct nand_chip *nand,
return -ENOTSUPP;
}
sunxi_nand->ecc.mode = i;
/* HW ECC always request ECC bytes for 1024 bytes blocks */
ecc->bytes = DIV_ROUND_UP(ecc->strength * fls(8 * 1024), 8);
@ -1726,6 +1713,12 @@ static int sunxi_nand_hw_ecc_ctrl_init(struct nand_chip *nand,
ecc->read_oob_raw = nand_read_oob_std;
ecc->write_oob_raw = nand_write_oob_std;
sunxi_nand->ecc.ecc_ctl = NFC_ECC_MODE(i) | NFC_ECC_EXCEPTION |
NFC_ECC_PIPELINE | NFC_ECC_EN;
if (ecc->size == 512)
sunxi_nand->ecc.ecc_ctl |= NFC_ECC_BLOCK_512;
return 0;
}