[PATCH v4 16/22] pinctrl: Probe pinctrl devices on demand

From: Tomeu Vizoso
Date: Mon Sep 07 2015 - 08:25:16 EST

When looking up a pin controller 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@xxxxxxxxxxxxx>

Changes in v4: None
Changes in v3: None
Changes in v2: None

drivers/pinctrl/devicetree.c | 3 +++
1 file changed, 3 insertions(+)

diff --git a/drivers/pinctrl/devicetree.c b/drivers/pinctrl/devicetree.c
index fe04e748dfe4..f5340b8e1dbe 100644
--- a/drivers/pinctrl/devicetree.c
+++ b/drivers/pinctrl/devicetree.c
@@ -18,6 +18,7 @@

#include <linux/device.h>
#include <linux/of.h>
+#include <linux/of_device.h>
#include <linux/pinctrl/pinctrl.h>
#include <linux/slab.h>

@@ -110,6 +111,8 @@ static int dt_to_map_one_config(struct pinctrl *p, const char *statename,
struct pinctrl_map *map;
unsigned num_maps;

+ of_device_probe(np_config);
/* Find the pin controller containing np_config */
np_pctldev = of_node_get(np_config);
for (;;) {

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