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mtd: nand: sunxi: Improve sunxi_nfc_cmd_ctrl() 

We only need to call sunxi_nfc_wait_cmd_fifo_empty() if we want to send
a new command. Move the sunxi_nfc_wait_cmd_fifo_empty() call to right
place to avoid extra register reads.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
This commit is contained in:
Boris Brezillon 2017-01-06 10:42:07 +01:00
parent 8de15e1feb
commit cad3274121
1 changed files with 4 additions and 4 deletions
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8
drivers/mtd/nand/sunxi_nand.c
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@ -604,10 +604,6 @@ static void sunxi_nfc_cmd_ctrl(struct mtd_info *mtd, int dat,
struct sunxi_nfc *nfc = to_sunxi_nfc(sunxi_nand->nand.controller);
int ret;
ret = sunxi_nfc_wait_cmd_fifo_empty(nfc);
if (ret)
return;
if (dat == NAND_CMD_NONE && (ctrl & NAND_NCE) &&
!(ctrl & (NAND_CLE | NAND_ALE))) {
u32 cmd = 0;
@ -637,6 +633,10 @@ static void sunxi_nfc_cmd_ctrl(struct mtd_info *mtd, int dat,
writel(sunxi_nand->addr[1],
nfc->regs + NFC_REG_ADDR_HIGH);
ret = sunxi_nfc_wait_cmd_fifo_empty(nfc);
if (ret)
return;
writel(cmd, nfc->regs + NFC_REG_CMD);
sunxi_nand->addr[0] = 0;
sunxi_nand->addr[1] = 0;