linux-kernel - Re: [PATCH 09/10] mtd: st_spi_fsm: Provide mask to obtain correct boot device pins

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Message-ID: <20140522115216.GV6679@lee--X1>
Date:	Thu, 22 May 2014 12:52:16 +0100
From:	Lee Jones <lee.jones@...aro.org>
To:	Arnd Bergmann <arnd@...db.de>
Cc:	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	Christophe Kerello <christophe.kerello@...com>,
	computersforpeace@...il.com, linux-mtd@...ts.infradead.org
Subject: Re: [PATCH 09/10] mtd: st_spi_fsm: Provide mask to obtain correct
 boot device pins

> On Thursday 22 May 2014 12:24:07 Lee Jones wrote:
> > +       /* Mask to apply on boot_device_reg */
> > +       ret = of_property_read_u32(np, "st,boot-device-msk", &boot_device_msk);
> > +       if (ret)
> > +               goto boot_device_fail;
> > +
> > 
> 
> The binding defines this property as "optional", but the driver fails
> here if it's not provided. I suggest you add a default value here so you
> can deal with existing dts. The default should be documented in
> the binding as well.

The property is optional. It doesn't fail completely, merely skips the
boot device check and falls back to using SPI.  I can update the
documentation to this effect though, no problem.

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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