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    Subject[PATCH AUTOSEL 5.4 206/350] nvmem: imx-ocotp: reset error status on probe
    Date
    From: Lucas Stach <l.stach@pengutronix.de>

    [ Upstream commit c33c585f1b3a99d53920bdac614aca461d8db06f ]

    If software running before the OCOTP driver is loaded left the
    controller with the error status pending, the driver will never
    be able to complete the read timing setup. Reset the error status
    on probe to make sure the controller is in usable state.

    Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
    Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
    Link: https://lore.kernel.org/r/20191029114240.14905-6-srinivas.kandagatla@linaro.org
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
    Signed-off-by: Sasha Levin <sashal@kernel.org>
    ---
    drivers/nvmem/imx-ocotp.c | 4 ++++
    1 file changed, 4 insertions(+)

    diff --git a/drivers/nvmem/imx-ocotp.c b/drivers/nvmem/imx-ocotp.c
    index dff2f3c357f56..fc40555ca4cdd 100644
    --- a/drivers/nvmem/imx-ocotp.c
    +++ b/drivers/nvmem/imx-ocotp.c
    @@ -521,6 +521,10 @@ static int imx_ocotp_probe(struct platform_device *pdev)
    if (IS_ERR(priv->clk))
    return PTR_ERR(priv->clk);

    + clk_prepare_enable(priv->clk);
    + imx_ocotp_clr_err_if_set(priv->base);
    + clk_disable_unprepare(priv->clk);
    +
    priv->params = of_device_get_match_data(&pdev->dev);
    imx_ocotp_nvmem_config.size = 4 * priv->params->nregs;
    imx_ocotp_nvmem_config.dev = dev;
    --
    2.20.1
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