From 166f08c7b6ab2f98eebbb6fc1fdb0be1efe0a566 Mon Sep 17 00:00:00 2001 From: Boris Brezillon Date: Mon, 7 Mar 2016 15:25:17 +0100 Subject: [PATCH] mtd: nand: sunxi: make use of readl_poll_timeout() Replace open coded polling loops by readl_poll_timeout() calls. Signed-off-by: Boris Brezillon --- drivers/mtd/nand/sunxi_nand.c | 34 +++++++++++++++++----------------- 1 file changed, 17 insertions(+), 17 deletions(-) diff --git a/drivers/mtd/nand/sunxi_nand.c b/drivers/mtd/nand/sunxi_nand.c index fff28512cd71..d4d79b2f1d43 100644 --- a/drivers/mtd/nand/sunxi_nand.c +++ b/drivers/mtd/nand/sunxi_nand.c @@ -38,7 +38,7 @@ #include #include #include -#include +#include #define NFC_REG_CTL 0x0000 #define NFC_REG_ST 0x0004 @@ -322,33 +322,33 @@ static int sunxi_nfc_wait_int(struct sunxi_nfc *nfc, u32 flags, static int sunxi_nfc_wait_cmd_fifo_empty(struct sunxi_nfc *nfc) { - unsigned long timeout = jiffies + - msecs_to_jiffies(NFC_DEFAULT_TIMEOUT_MS); + u32 status; + int ret; - do { - if (!(readl(nfc->regs + NFC_REG_ST) & NFC_CMD_FIFO_STATUS)) - return 0; - } while (time_before(jiffies, timeout)); + ret = readl_poll_timeout(nfc->regs + NFC_REG_ST, status, + !(status & NFC_CMD_FIFO_STATUS), 1, + NFC_DEFAULT_TIMEOUT_MS * 1000); + if (ret) + dev_err(nfc->dev, "wait for empty cmd FIFO timedout\n"); - dev_err(nfc->dev, "wait for empty cmd FIFO timedout\n"); - return -ETIMEDOUT; + return ret; } static int sunxi_nfc_rst(struct sunxi_nfc *nfc) { - unsigned long timeout = jiffies + - msecs_to_jiffies(NFC_DEFAULT_TIMEOUT_MS); + u32 ctl; + int ret; writel(0, nfc->regs + NFC_REG_ECC_CTL); writel(NFC_RESET, nfc->regs + NFC_REG_CTL); - do { - if (!(readl(nfc->regs + NFC_REG_CTL) & NFC_RESET)) - return 0; - } while (time_before(jiffies, timeout)); + ret = readl_poll_timeout(nfc->regs + NFC_REG_CTL, ctl, + !(ctl & NFC_RESET), 1, + NFC_DEFAULT_TIMEOUT_MS * 1000); + if (ret) + dev_err(nfc->dev, "wait for NAND controller reset timedout\n"); - dev_err(nfc->dev, "wait for NAND controller reset timedout\n"); - return -ETIMEDOUT; + return ret; } static int sunxi_nfc_dev_ready(struct mtd_info *mtd) -- 2.20.1