lkml.org 
[lkml]   [2019]   [May]   [6]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    From
    Subject[PATCH 4.19 88/99] gpio: mxc: add check to return defer probe if clock tree NOT ready
    Date
    From: Anson Huang <anson.huang@nxp.com>

    commit a329bbe707cee2cf8c660890ef2ad0d00ec7e8a3 upstream.

    On i.MX8MQ platform, clock driver uses platform driver
    model and it is probed after GPIO driver, so when GPIO
    driver fails to get clock, it should check the error type
    to decide whether to return defer probe or just ignore
    the clock operation.

    Fixes: 2808801aab8a ("gpio: mxc: add clock operation")
    Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
    Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

    ---
    drivers/gpio/gpio-mxc.c | 5 ++++-
    1 file changed, 4 insertions(+), 1 deletion(-)

    --- a/drivers/gpio/gpio-mxc.c
    +++ b/drivers/gpio/gpio-mxc.c
    @@ -438,8 +438,11 @@ static int mxc_gpio_probe(struct platfor

    /* the controller clock is optional */
    port->clk = devm_clk_get(&pdev->dev, NULL);
    - if (IS_ERR(port->clk))
    + if (IS_ERR(port->clk)) {
    + if (PTR_ERR(port->clk) == -EPROBE_DEFER)
    + return -EPROBE_DEFER;
    port->clk = NULL;
    + }

    err = clk_prepare_enable(port->clk);
    if (err) {

    \
     
     \ /
      Last update: 2019-05-06 17:00    [W:4.576 / U:0.296 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site