linux-kernel - [PATCH 1/6] i2c: bcm-kona: register with subsys

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Date:	Tue,  4 Feb 2014 07:19:07 -0500
From:	Matt Porter <mporter@...aro.org>
To:	Wolfram Sang <wsa@...-dreams.de>,
	Tim Kryger <tim.kryger@...aro.org>,
	Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Samuel Ortiz <sameo@...ux.intel.com>,
	Lee Jones <lee.jones@...aro.org>,
	Liam Girdwood <lgirdwood@...il.com>,
	Mark Brown <broonie@...nsource.wolfsonmicro.com>,
	Christian Daudt <bcm@...thebug.org>
Cc:	Devicetree List <devicetree@...r.kernel.org>,
	Linux I2C List <linux-i2c@...r.kernel.org>,
	Linux ARM Kernel List <linux-arm-kernel@...ts.infradead.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: [PATCH 1/6] i2c: bcm-kona: register with subsys_initcall

Voltage regulators are needed very early due to deferred probe
being incompatible with built-in USB gadget drivers. In order to
have the PMU driver available before USB UDC, make i2c available
during subsys_initcall.

Signed-off-by: Matt Porter <mporter@...aro.org>
Reviewed-by: Tim Kryger <tim.kryger@...aro.org>
Reviewed-by: Markus Mayer <markus.mayer@...aro.org>
---
 drivers/i2c/busses/i2c-bcm-kona.c | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/drivers/i2c/busses/i2c-bcm-kona.c b/drivers/i2c/busses/i2c-bcm-kona.c
index 18a74a6..bfd4056 100644
--- a/drivers/i2c/busses/i2c-bcm-kona.c
+++ b/drivers/i2c/busses/i2c-bcm-kona.c
@@ -901,7 +901,19 @@ static struct platform_driver bcm_kona_i2c_driver = {
 	.probe = bcm_kona_i2c_probe,
 	.remove = bcm_kona_i2c_remove,
 };
-module_platform_driver(bcm_kona_i2c_driver);
+
+static int __init bcm_kona_i2c_init_driver(void)
+{
+	return platform_driver_register(&bcm_kona_i2c_driver);
+}
+/* PMU access is needed early so use subsys init */
+subsys_initcall(bcm_kona_i2c_init_driver);
+
+static void __exit bcm_kona_i2c_exit_driver(void)
+{
+	platform_driver_unregister(&bcm_kona_i2c_driver);
+}
+module_exit(bcm_kona_i2c_exit_driver);
 
 MODULE_AUTHOR("Tim Kryger <tkryger@...adcom.com>");
 MODULE_DESCRIPTION("Broadcom Kona I2C Driver");
-- 
1.8.4

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