From mboxrd@z Thu Jan 1 00:00:00 1970 From: broonie@opensource.wolfsonmicro.com (Mark Brown) Date: Tue, 15 Dec 2009 14:52:25 +0000 Subject: [PATCH 4/4] regulator: mc13783-regulator: correct the probing time. In-Reply-To: <1260813215.2022.171.camel@climbing-alby> References: <1260808880.2022.98.camel@climbing-alby> <1260810776.2022.130.camel@climbing-alby> <1260811085.2022.135.camel@climbing-alby> <1260811598.2022.144.camel@climbing-alby> <1260813215.2022.171.camel@climbing-alby> Message-ID: <20091215145225.GA29034@rakim.wolfsonmicro.main> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Mon, Dec 14, 2009 at 06:53:35PM +0100, Alberto Panizzo wrote: > When the mc13783-regulator driver is built in kernel, probing it during > the regulator subsystem initialisation result in a fault. > > That is because regulator subsystem is planned to be initialised very early > in the boot process, before the mfd subsystem initialisation. > > The mc12783-regulator probing process need to access to the mc13783-core > functionality to read/write mc13783 registers and so must be called after > the mc13783-core driver initialisation. > > The way to do this is to let the kernel probe the mc13783-regulator driver when > mc13783-core register his regulator subdevice. > > Signed-off-by: Alberto Panizzo Acked-by: Mark Brown