C++ (Cpp) readb_poll_timeout示例

示例#1

文件： mtk_qspi.c 项目： Noltari/u-boot

static int mtk_qspi_execute_cmd(struct mtk_qspi_priv *priv, u8 cmd)
{
	u8 tmp;
	u8 val = cmd & ~MTK_QSPI_AUTOINC;

	writeb(cmd, &priv->regs->cmd);

	return readb_poll_timeout(&priv->regs->cmd, tmp, !(val & tmp),
				  MTK_QSPI_CMD_POLLINGREG_US);
}

示例#2

文件： nxp-spifi.c 项目： aejsmith/linux

static int nxp_spifi_wait_for_cmd(struct nxp_spifi *spifi)
{
    u8 stat;
    int ret;

    ret = readb_poll_timeout(spifi->io_base + SPIFI_STAT, stat,
                             !(stat & SPIFI_STAT_CMD), 10, 30);
    if (ret)
        dev_warn(spifi->dev, "command timed out\n");

    return ret;
}

示例#3

文件： nxp-spifi.c 项目： aejsmith/linux

static int nxp_spifi_reset(struct nxp_spifi *spifi)
{
    u8 stat;
    int ret;

    writel(SPIFI_STAT_RESET, spifi->io_base + SPIFI_STAT);
    ret = readb_poll_timeout(spifi->io_base + SPIFI_STAT, stat,
                             !(stat & SPIFI_STAT_RESET), 10, 30);
    if (ret)
        dev_warn(spifi->dev, "state reset timed out\n");

    return ret;
}

示例#4

文件： nxp-spifi.c 项目： aejsmith/linux

static int nxp_spifi_set_memory_mode_on(struct nxp_spifi *spifi)
{
    u8 stat;
    int ret;

    if (spifi->memory_mode)
        return 0;

    writel(spifi->mcmd, spifi->io_base + SPIFI_MCMD);
    ret = readb_poll_timeout(spifi->io_base + SPIFI_STAT, stat,
                             stat & SPIFI_STAT_MCINIT, 10, 30);
    if (ret)
        dev_err(spifi->dev, "unable to enter memory mode\n");
    else
        spifi->memory_mode = true;

    return ret;
}