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    Subject[PATCH 14/21] pwm: Probe PWM chip devices on demand
    Date
    When looking up a PWM chip through its DT node, ensure that the
    corresponding device has been registered.

    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 ba34c7d..31f486c 100644
    --- a/drivers/pwm/core.c
    +++ b/drivers/pwm/core.c
    @@ -24,6 +24,7 @@
    #include <linux/radix-tree.h>
    #include <linux/list.h>
    #include <linux/mutex.h>
    +#include <linux/of_platform.h>
    #include <linux/err.h>
    #include <linux/slab.h>
    #include <linux/device.h>
    @@ -479,6 +480,8 @@ static struct pwm_chip *of_node_to_pwmchip(struct device_node *np)
    {
    struct pwm_chip *chip;

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

    list_for_each_entry(chip, &pwm_chips, list)
    --
    2.4.1


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