linux-kernel - Re: [PATCH v4 2/6] pinctrl: st: Enhance the controller to manage unavailable registers

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Date:	Wed, 12 Mar 2014 09:38:25 +0000
From:	Lee Jones <lee.jones@...aro.org>
To:	Maxime COQUELIN <maxime.coquelin@...com>
Cc:	Rob Landley <rob@...dley.net>, 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>,
	Russell King <linux@....linux.org.uk>,
	Srinivas Kandagatla <srinivas.kandagatla@...com>,
	Stuart Menefy <stuart.menefy@...com>,
	Linus Walleij <linus.walleij@...aro.org>,
	Giuseppe Cavallaro <peppe.cavallaro@...com>,
	linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
	devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	kernel@...inux.com
Subject: Re: [PATCH v4 2/6] pinctrl: st: Enhance the controller to manage
 unavailable registers

> From: Giuseppe Cavallaro <peppe.cavallaro@...com>
> 
> This patch adds a new logic inside the st pinctrl to manage
> an unsupported scenario: some sysconfig are not available!
> 
> This is the case of STiH407 where, although documented, the
> following registers from SYSCFG_FLASH have been removed from the SoC.
> 
> SYSTEM_CONFIG3040
>    Output Enable pad control for all PIO Alternate Functions
> and
> SYSTEM_ CONFIG3050
>    Pull Up pad control for all PIO Alternate Functions
> 
> Without managing this condition an imprecise external abort
> will be detect.
> 
> To do this the patch also reviews the st_parse_syscfgs
> and other routines to manipulate the registers only if
> actually available.
> In any case, for example the st_parse_syscfgs detected
> an error condition but no action was made in the
> st_pctl_probe_dt.
> 
> Acked-by: Giuseppe Cavallaro <peppe.cavallaro@...com>
> Acked-by: Srinivas Kandagatla <srinivas.kandagatla@...com>
> Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@...com>
> Signed-off-by: Maxime Coquelin <maxime.coquelin@...com>
> ---
>  drivers/pinctrl/pinctrl-st.c | 104 +++++++++++++++++++++++++------------------
>  1 file changed, 61 insertions(+), 43 deletions(-)

Acked-by: Lee Jones <lee.jones@...aro.org>

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