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Groups > linux.kernel > #1226995

[PATCH v5 17/23] pinctrl: Probe pinctrl devices on demand

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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@collabora.com>
---

Changes in v5: None
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 (;;) {
-- 
2.4.3

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Thread

[PATCH v5 0/23] On-demand device probing Tomeu Vizoso <tomeu.vizoso@collabora.com> - 2015-09-17 15:00 +0200
  [PATCH v5 19/23] dma: of: Probe DMA controllers on demand Tomeu Vizoso <tomeu.vizoso@collabora.com> - 2015-09-17 15:00 +0200
  [PATCH v5 07/23] regulator: core: Remove regulator_list Tomeu Vizoso <tomeu.vizoso@collabora.com> - 2015-09-17 15:00 +0200
    Re: [PATCH v5 07/23] regulator: core: Remove regulator_list Mark Brown <broonie@kernel.org> - 2015-09-20 02:40 +0200
      Re: [PATCH v5 07/23] regulator: core: Remove regulator_list Russell King - ARM Linux <linux@arm.linux.org.uk> - 2015-09-20 22:40 +0200
        Re: [PATCH v5 07/23] regulator: core: Remove regulator_list Tomeu Vizoso <tomeu.vizoso@collabora.com> - 2015-09-21 16:10 +0200
      Re: [PATCH v5 07/23] regulator: core: Remove regulator_list Tomeu Vizoso <tomeu.vizoso@collabora.com> - 2015-09-21 16:10 +0200
  [PATCH v5 21/23] driver core: Allow deferring probes until late init Tomeu Vizoso <tomeu.vizoso@collabora.com> - 2015-09-17 15:00 +0200
  [PATCH v5 17/23] pinctrl: Probe pinctrl devices on demand Tomeu Vizoso <tomeu.vizoso@collabora.com> - 2015-09-17 15:00 +0200
  [PATCH v5 20/23] power-supply: Probe power supplies on demand Tomeu Vizoso <tomeu.vizoso@collabora.com> - 2015-09-17 15:00 +0200
  [PATCH v5 12/23] i2c: core: Probe i2c adapters and devices on demand Tomeu Vizoso <tomeu.vizoso@collabora.com> - 2015-09-17 15:00 +0200
  [PATCH v5 15/23] usb: phy: Probe phy devices on demand Tomeu Vizoso <tomeu.vizoso@collabora.com> - 2015-09-17 15:10 +0200
  [PATCH v5 05/23] gpio: Probe GPIO drivers on demand Tomeu Vizoso <tomeu.vizoso@collabora.com> - 2015-09-17 15:10 +0200
  [PATCH v5 13/23] pwm: Probe PWM chip devices on demand Tomeu Vizoso <tomeu.vizoso@collabora.com> - 2015-09-17 15:10 +0200
  [PATCH v5 10/23] drm: Probe panels on demand Tomeu Vizoso <tomeu.vizoso@collabora.com> - 2015-09-17 15:10 +0200
  [PATCH v5 06/23] gpio: Probe pinctrl devices on demand Tomeu Vizoso <tomeu.vizoso@collabora.com> - 2015-09-17 15:10 +0200
  [PATCH v5 18/23] phy: core: Probe phy providers on demand Tomeu Vizoso <tomeu.vizoso@collabora.com> - 2015-09-17 15:10 +0200
  [PATCH v5 16/23] clk: Probe clk providers on demand Tomeu Vizoso <tomeu.vizoso@collabora.com> - 2015-09-17 15:10 +0200
  [PATCH v5 08/23] regulator: core: Drop redundant locking Tomeu Vizoso <tomeu.vizoso@collabora.com> - 2015-09-17 15:10 +0200
  [PATCH v5 14/23] backlight: Probe backlight devices on demand Tomeu Vizoso <tomeu.vizoso@collabora.com> - 2015-09-17 15:10 +0200
  [PATCH v5 02/23] ARM: amba: Move reading of periphid to pre_probe() Tomeu Vizoso <tomeu.vizoso@collabora.com> - 2015-09-17 15:10 +0200
  [PATCH v5 04/23] of: add function to allow probing a device from a OF node Tomeu Vizoso <tomeu.vizoso@collabora.com> - 2015-09-17 15:10 +0200
  [PATCH v5 11/23] drm/tegra: Probe dpaux devices on demand Tomeu Vizoso <tomeu.vizoso@collabora.com> - 2015-09-17 15:10 +0200

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