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authorBoris Brezillon <boris.brezillon@free-electrons.com>2017-01-06 12:42:07 +0300
committerBoris Brezillon <boris.brezillon@free-electrons.com>2017-02-06 11:35:19 +0300
commitcad32741218299eee3f75de21ac9ccab8485bd62 (patch)
tree3a3dae165a09485be7686cd88e10e9d0df7c0144 /drivers/mtd
parent8de15e1feb232086d1d14e01a6a7648d10002c19 (diff)
downloadlinux-cad32741218299eee3f75de21ac9ccab8485bd62.tar.xz
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>
Diffstat (limited to 'drivers/mtd')
-rw-r--r--drivers/mtd/nand/sunxi_nand.c8
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/mtd/nand/sunxi_nand.c b/drivers/mtd/nand/sunxi_nand.c
index 76449f79d4c5..0eeeb8b889ea 100644
--- a/drivers/mtd/nand/sunxi_nand.c
+++ b/drivers/mtd/nand/sunxi_nand.c
@@ -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;