linux-kernel - Re: [RESEND PATCH v5 1/5] mfd: RK808: Add RK818 support

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Date:	Thu, 9 Jun 2016 15:11:56 +0200
From:	Wadim Egorov <w.egorov@...tec.de>
To:	Lee Jones <lee.jones@...aro.org>
Cc:	linux-kernel@...r.kernel.org, linux-clk@...r.kernel.org,
	rtc-linux@...glegroups.com, devicetree@...r.kernel.org,
	linux-rockchip@...ts.infradead.org, robh+dt@...nel.org,
	pawel.moll@....com, mark.rutland@....com,
	ijc+devicetree@...lion.org.uk, galak@...eaurora.org,
	mturquette@...libre.com, sboyd@...eaurora.org, lgirdwood@...il.com,
	broonie@...nel.org, a.zummo@...ertech.it,
	alexandre.belloni@...e-electrons.com, dianders@...omium.org,
	zyw@...k-chips.com
Subject: Re: [RESEND PATCH v5 1/5] mfd: RK808: Add RK818 support



On 09.06.2016 13:12, Lee Jones wrote:
> On Thu, 09 Jun 2016, Wadim Egorov wrote:
>> On 08.06.2016 16:17, Lee Jones wrote:
>>> On Thu, 02 Jun 2016, Wadim Egorov wrote:
>>>
>>>> The RK818 chip is a power management IC for multimedia and handheld
>>> "Power Management IC (PMIC)"
>>>
>>>> devices. It contains the following components:
>>>>
>>>> - Regulators
>>>> - RTC
>>>> - Clkout
>>> Clocking
>>>
>>>> - battery support
>>> Battery support
>>>
>>>> Both chips RK808 and RK818 are using a similar register map.
>>> "Both RK808 ad RK818 chips"
>>>
>>>> So we can reuse the RTC and Clkout functionality.
>>> Swap '.' for ','.
>>>
>>>> Signed-off-by: Wadim Egorov <w.egorov@...tec.de>
>>>> ---
>>>>  drivers/mfd/Kconfig       |   4 +-
>>>>  drivers/mfd/rk808.c       | 231 ++++++++++++++++++++++++++++++++++++++--------
>>>>  include/linux/mfd/rk808.h | 162 ++++++++++++++++++++++++++++++--
>>>>  3 files changed, 350 insertions(+), 47 deletions(-)
> [...]
>
>>>> -struct rk808_reg_data {
>>>> -	int addr;
>>>> -	int mask;
>>>> -	int value;
>>>> -};
>>> Why are you moving this to the header?
>> It is now part of the rk808 struct.
> Why?
>
For me it seemed reasonable. My idea was to have only one chip variant
check.

I can move the rk808_reg_data struct back to the c file, check for the
chip variant within the probe function and initialize the proper
reg_data variable.
This would also apply to the mfd_cell variables.