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    Subject[PATCH 5.12 206/242] extcon: intel-mrfld: Sync hardware and software state on init
    Date
    From: Ferry Toth <ftoth@exalondelft.nl>

    commit ecb5bdff901139850fb3ca3ae2d0cccac045bc52 upstream.

    extcon driver for Basin Cove PMIC shadows the switch status used for dwc3
    DRD to detect a change in the switch position. This change initializes the
    status at probe time.

    Cc: stable@vger.kernel.org
    Fixes: 492929c54791 ("extcon: mrfld: Introduce extcon driver for Basin Cove PMIC")
    Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
    Signed-off-by: Ferry Toth <ftoth@exalondelft.nl>
    Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
    ---
    drivers/extcon/extcon-intel-mrfld.c | 9 +++++++++
    1 file changed, 9 insertions(+)

    --- a/drivers/extcon/extcon-intel-mrfld.c
    +++ b/drivers/extcon/extcon-intel-mrfld.c
    @@ -197,6 +197,7 @@ static int mrfld_extcon_probe(struct pla
    struct intel_soc_pmic *pmic = dev_get_drvdata(dev->parent);
    struct regmap *regmap = pmic->regmap;
    struct mrfld_extcon_data *data;
    + unsigned int status;
    unsigned int id;
    int irq, ret;

    @@ -244,6 +245,14 @@ static int mrfld_extcon_probe(struct pla
    /* Get initial state */
    mrfld_extcon_role_detect(data);

    + /*
    + * Cached status value is used for cable detection, see comments
    + * in mrfld_extcon_cable_detect(), we need to sync cached value
    + * with a real state of the hardware.
    + */
    + regmap_read(regmap, BCOVE_SCHGRIRQ1, &status);
    + data->status = status;
    +
    mrfld_extcon_clear(data, BCOVE_MIRQLVL1, BCOVE_LVL1_CHGR);
    mrfld_extcon_clear(data, BCOVE_MCHGRIRQ1, BCOVE_CHGRIRQ_ALL);


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