linux-kernel - Re: [PATCH V7 5/5] rtc: max77686: move initialisation of rtc regmap, irq chip locally

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Date:	Wed, 10 Feb 2016 16:08:28 +0000
From:	Lee Jones <lee.jones@...aro.org>
To:	Laxman Dewangan <ldewangan@...dia.com>
Cc:	alexandre.belloni@...e-electrons.com, k.kozlowski@...sung.com,
	javier@....samsung.com, broonie@...nel.org,
	gregkh@...uxfoundation.org, a.zummo@...ertech.it,
	cw00.choi@...sung.com, linux-kernel@...r.kernel.org,
	rtc-linux@...glegroups.com
Subject: Re: [PATCH V7 5/5] rtc: max77686: move initialisation of rtc regmap,
 irq chip locally

On Tue, 09 Feb 2016, Laxman Dewangan wrote:

> To make RTC block of MAX77686/MAX77802 as independent driver,
> move the registration of i2c device, regmap for register access
> and irq_chip for interrupt support inside the RTC driver.
> Removed the same initialisation from MFD driver.
> 
> Having this change will allow to reuse this driver for different
> PMIC/devices from Maxim Semiconductor if they kept same RTC IP on
> different PMIC. Some of examples as PMIC MAX77620, MAX20024 where
> same RTC IP used and hence driver for these chips will use this
> driver only for RTC support.
> 
> Suggested-by: Krzysztof Kozlowski <k.kozlowski@...sung.com>
> Signed-off-by: Laxman Dewangan <ldewangan@...dia.com>
> CC: Krzysztof Kozlowski <k.kozlowski@...sung.com>
> CC: Javier Martinez Canillas <javier@....samsung.com>
> Tested-by: Javier Martinez Canillas <javier@....samsung.com>
> Reviewed-by: Javier Martinez Canillas <javier@....samsung.com>
> 
> ---
> Changes from V1:
> - Remove changes from Kconfig.
> - Maintain all register definition in max77686 private header and remove
>   the movement to rtc driver.
> - Taken care of all comments on V1 from Krzysztof and Javier.
> 
> Changes from V2:
> - Taken care of missed sequence for removing the resource.
> - Fix the crash when doing unbind by using requested_threaded_irq()
>   instead of demv_requested_threaded_irq().
> 
> Changes from V3:
> - Fix the issue of suspend-resume with unbind/bind by unmapping the
>   virq.
> 
> Changes from V4:
> - Dispose mapped irq in error path in probe
> 
> Changes from V5:
> - Remove the new APIs from regmap as functionality added to dispose the
>   virq inside the regmap_del_irq_chip().
> 
> Changes from V6:
> Make this as 5th of series as regmap change applied independently.
> Also rebase on linux-next 20160209
> 
>  drivers/mfd/max77686.c               |  85 +-------------------
>  drivers/rtc/rtc-max77686.c           | 148 ++++++++++++++++++++++++++++++-----
>  include/linux/mfd/max77686-private.h |   3 -
>  3 files changed, 130 insertions(+), 106 deletions(-)

Yes, yes, yes!

This is how it should have been done in the first place IMHO.

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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