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Groups > linux.kernel > #1220125

[PATCH v4 15/22] clk: Probe clk providers on demand

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When looking up a clock 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 v4: None
Changes in v3: None
Changes in v2: None

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

diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
index 43e2c3ad6c31..e5fe02a11c36 100644
--- a/drivers/clk/clk.c
+++ b/drivers/clk/clk.c
@@ -19,6 +19,7 @@
 #include <linux/list.h>
 #include <linux/slab.h>
 #include <linux/of.h>
+#include <linux/of_device.h>
 #include <linux/device.h>
 #include <linux/init.h>
 #include <linux/sched.h>
@@ -3004,6 +3005,8 @@ struct clk *__of_clk_get_from_provider(struct of_phandle_args *clkspec,
 	if (!clkspec)
 		return ERR_PTR(-EINVAL);
 
+	of_device_probe(clkspec->np);
+
 	/* Check if we have such a provider in our array */
 	mutex_lock(&of_clk_mutex);
 	list_for_each_entry(provider, &of_clk_providers, link) {
-- 
2.4.3

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Thread

[PATCH v4 0/22] On-demand device probing Tomeu Vizoso <tomeu.vizoso@collabora.com> - 2015-09-07 14:30 +0200
  [PATCH v4 13/22] backlight: Probe backlight devices on demand Tomeu Vizoso <tomeu.vizoso@collabora.com> - 2015-09-07 14:30 +0200
  [PATCH v4 05/22] gpio: Probe GPIO drivers on demand Tomeu Vizoso <tomeu.vizoso@collabora.com> - 2015-09-07 14:30 +0200
  [PATCH v4 03/22] of/platform: Point to struct device from device node Tomeu Vizoso <tomeu.vizoso@collabora.com> - 2015-09-07 14:30 +0200
  [PATCH v4 09/22] drm: Probe panels on demand Tomeu Vizoso <tomeu.vizoso@collabora.com> - 2015-09-07 14:30 +0200
  [PATCH v4 20/22] driver core: Allow deferring probes until late init Tomeu Vizoso <tomeu.vizoso@collabora.com> - 2015-09-07 14:30 +0200
    Re: [PATCH v4 20/22] driver core: Allow deferring probes until late  init Mark Brown <broonie@kernel.org> - 2015-09-11 14:20 +0200
      Re: [PATCH v4 20/22] driver core: Allow deferring probes until late init Tomeu Vizoso <tomeu.vizoso@collabora.com> - 2015-09-14 11:10 +0200
  [PATCH v4 14/22] usb: phy: Probe phy devices on demand Tomeu Vizoso <tomeu.vizoso@collabora.com> - 2015-09-07 14:30 +0200
  [PATCH v4 15/22] clk: Probe clk providers on demand Tomeu Vizoso <tomeu.vizoso@collabora.com> - 2015-09-07 14:30 +0200
  [PATCH v4 22/22] of/platform: Defer probes of registered devices Tomeu Vizoso <tomeu.vizoso@collabora.com> - 2015-09-07 14:30 +0200
  [PATCH v4 16/22] pinctrl: Probe pinctrl devices on demand Tomeu Vizoso <tomeu.vizoso@collabora.com> - 2015-09-07 14:30 +0200
  [PATCH v4 21/22] driver core: Start processing deferred probes earlier Tomeu Vizoso <tomeu.vizoso@collabora.com> - 2015-09-07 14:30 +0200
    Re: [PATCH v4 21/22] driver core: Start processing deferred probes  earlier Mark Brown <broonie@kernel.org> - 2015-09-11 14:30 +0200
      Re: [PATCH v4 21/22] driver core: Start processing deferred probes earlier Tomeu Vizoso <tomeu.vizoso@collabora.com> - 2015-09-15 15:20 +0200
  [PATCH v4 07/22] regulator: core: Reduce critical area in _regulator_get Tomeu Vizoso <tomeu.vizoso@collabora.com> - 2015-09-07 14:40 +0200
    Re: [PATCH v4 07/22] regulator: core: Reduce critical area in  _regulator_get Mark Brown <broonie@kernel.org> - 2015-09-11 14:20 +0200
  [PATCH v4 11/22] i2c: core: Probe i2c adapters and devices on demand Tomeu Vizoso <tomeu.vizoso@collabora.com> - 2015-09-07 14:40 +0200
  [PATCH v4 12/22] pwm: Probe PWM chip devices on demand Tomeu Vizoso <tomeu.vizoso@collabora.com> - 2015-09-07 14:40 +0200
  [PATCH v4 02/22] ARM: amba: Move reading of periphid to pre_probe() Tomeu Vizoso <tomeu.vizoso@collabora.com> - 2015-09-07 14:40 +0200
  [PATCH v4 01/22] driver core: Add pre_probe callback to bus_type Tomeu Vizoso <tomeu.vizoso@collabora.com> - 2015-09-07 14:40 +0200
    Re: [PATCH v4 01/22] driver core: Add pre_probe callback to bus_type Mark Brown <broonie@kernel.org> - 2015-09-11 14:10 +0200
  [PATCH v4 10/22] drm/tegra: Probe dpaux devices on demand Tomeu Vizoso <tomeu.vizoso@collabora.com> - 2015-09-07 14:40 +0200
  Re: [PATCH v4 0/22] On-demand device probing Rob Herring <robherring2@gmail.com> - 2015-09-07 23:00 +0200
    Re: [PATCH v4 0/22] On-demand device probing Tomeu Vizoso <tomeu.vizoso@collabora.com> - 2015-09-08 09:40 +0200
      Re: [PATCH v4 0/22] On-demand device probing Rob Herring <robh@kernel.org> - 2015-09-09 07:50 +0200
        Re: [PATCH v4 0/22] On-demand device probing Tomeu Vizoso <tomeu.vizoso@collabora.com> - 2015-09-09 11:50 +0200

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