[PATCH 2/2] gpio: mvebu: fix gpio bank registration when pwm is used

[Richard Genoud]

If more than one gpio bank has the "pwm" property, only one will be
registered successfully, all the others will fail with:
mvebu-gpio: probe of f1018140.gpio failed with error -17

That's because in alloc_pwms(), the chip->base (aka "int pwm"), was not
set (thus, ==0) ; and 0 is a meaningful start value in alloc_pwm().
What was intended is chip->base = -1.
Like that, the numbering will be done auto-magically

Tested on clearfog-pro (Marvell 88F6828)

Signed-off-by: Richard Genoud <richard.genoud at gmail.com>
---
 drivers/gpio/gpio-mvebu.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpio/gpio-mvebu.c b/drivers/gpio/gpio-mvebu.c
index cdef2c78cb3b..4734923e11fd 100644
--- a/drivers/gpio/gpio-mvebu.c
+++ b/drivers/gpio/gpio-mvebu.c
@@ -768,6 +768,7 @@ static int mvebu_pwm_probe(struct platform_device *pdev,
 	mvpwm->chip.dev = dev;
 	mvpwm->chip.ops = &mvebu_pwm_ops;
 	mvpwm->chip.npwm = mvchip->chip.ngpio;
+	mvpwm->chip.base = -1;
 
 	spin_lock_init(&mvpwm->lock);