pwm: Autodetect default value for of_pwm_n_cells from device tree

[linux-2.6-microblaze.git] / drivers / pwm / core.c

diff --git a/drivers/pwm/core.c b/drivers/pwm/core.c
index 821ee19..c165c58 100644 (file)
--- a/drivers/pwm/core.c
+++ b/drivers/pwm/core.c
@@ -158,8 +158,14 @@ static void of_pwmchip_add(struct pwm_chip *chip)
                return;
 
        if (!chip->of_xlate) {
+               u32 pwm_cells;
+
+               if (of_property_read_u32(chip->dev->of_node, "#pwm-cells",
+                                        &pwm_cells))
+                       pwm_cells = 2;
+
                chip->of_xlate = of_pwm_xlate_with_flags;
-               chip->of_pwm_n_cells = 2;
+               chip->of_pwm_n_cells = pwm_cells;
        }
 
        of_node_get(chip->dev->of_node);