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    Subject[PATCH v7 11/20] pwm: Probe PWM chip devices on demand
    Date
    When looking up a PWM chip through its OF node, probe it if it hasn't
    already.

    The goal is to reduce deferred probes to a minimum, as it makes it very
    cumbersome to find out why a device failed to probe, and can introduce
    very big delays in when a critical device is probed.

    Signed-off-by: Tomeu Vizoso <tomeu.vizoso@collabora.com>
    ---


    drivers/pwm/core.c | 3 +++
    1 file changed, 3 insertions(+)

    diff --git a/drivers/pwm/core.c b/drivers/pwm/core.c
    index 3f9df3ea3350..794a923df0d8 100644
    --- a/drivers/pwm/core.c
    +++ b/drivers/pwm/core.c
    @@ -29,6 +29,7 @@
    #include <linux/device.h>
    #include <linux/debugfs.h>
    #include <linux/seq_file.h>
    +#include <linux/of_device.h>

    #include <dt-bindings/pwm/pwm.h>

    @@ -516,6 +517,8 @@ static struct pwm_chip *of_node_to_pwmchip(struct device_node *np)
    {
    struct pwm_chip *chip;

    + of_device_probe(np);
    +
    mutex_lock(&pwm_lock);

    list_for_each_entry(chip, &pwm_chips, list)
    --
    2.4.3


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