linux-kernel - Re: [PATCH 2/4] input: add Qualcomm QPNP haptics driver

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Message-ID: <YMY8OcMrDh2D4qVg@yoga>
Date:   Sun, 13 Jun 2021 12:11:21 -0500
From:   Bjorn Andersson <bjorn.andersson@...aro.org>
To:     Caleb Connolly <caleb@...nolly.tech>
Cc:     Dmitry Torokhov <dmitry.torokhov@...il.com>,
        ~postmarketos/upstreaming@...ts.sr.ht, phone-devel@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-input@...r.kernel.org
Subject: Re: [PATCH 2/4] input: add Qualcomm QPNP haptics driver

On Sun 13 Jun 11:24 CDT 2021, Caleb Connolly wrote:

> Hi Bjorn,
> 
> Thanks a lot for your feedback.
> 
> On 13/06/2021 5:09 am, Bjorn Andersson wrote:
> > On Sat 12 Jun 15:54 CDT 2021, Caleb Connolly wrote:
> >
> >> Add support for the haptics found in pmi8998 and related PMICs.
> >> Based on the ff-memless interface. Currently this driver provides
> >> a partial implementation of hardware features.
> >>
> >> This driver only supports LRAs (Linear Resonant Actuators) in the "buffer"
> >> mode with a single wave pattern.
> >>
> >> Signed-off-by: Caleb Connolly <caleb@...nolly.tech>
> >
> > Please use a cover letter when posting multiple patches.
> I'm not sure why the cover letter didn't make it to your inbox, here's a
> link:
> https://lore.kernel.org/linux-arm-msm/20210612205405.1233588-1-caleb@connolly.tech/

It arrived later, for some reason. Sorry for the fuzz.

> >
> >> ---
> >>  drivers/input/misc/Kconfig        |   11 +
> >>  drivers/input/misc/Makefile       |    1 +
> >>  drivers/input/misc/qpnp-haptics.c | 1022 +++++++++++++++++++++++++++++
> >>  3 files changed, 1034 insertions(+)
> >>  create mode 100644 drivers/input/misc/qpnp-haptics.c
> >>
> >> diff --git a/drivers/input/misc/Kconfig b/drivers/input/misc/Kconfig
> >> index 498cde376981..b5ba03e6cf58 100644
> >> --- a/drivers/input/misc/Kconfig
> >> +++ b/drivers/input/misc/Kconfig
> >> @@ -186,6 +186,17 @@ config INPUT_PMIC8XXX_PWRKEY
> >>  	  To compile this driver as a module, choose M here: the
> >>  	  module will be called pmic8xxx-pwrkey.
> >>
> >> +config INPUT_QPNP_HAPTICS
> >
> > No-one knows what "QPNP" really is, so please name this
> > "INPUT_QCOM_SPMI_HAPTICS"
> >
> >> +	tristate "Qualcomm QPNP HAPTICS"
> >> +	depends on ARCH_QCOM
> >
> > "depends on SPMI" makes sense here.
> >
> >> +	select INPUT_FF_MEMLESS
> >> +	help
> >> +	  This option enables support for the haptics found in pmi8998 and
> >> +	  related PMICs. Based on the ff-memless interface.
> >> +
> >> +	  To compile this driver as module, choose M here: the
> >> +	  module will be called qpnp-haptics.
> >> +
> >>  config INPUT_SPARCSPKR
> >>  	tristate "SPARC Speaker support"
> >>  	depends on PCI && SPARC64
> >> diff --git a/drivers/input/misc/Makefile b/drivers/input/misc/Makefile
> >> index f593beed7e05..c43290163db0 100644
> >> --- a/drivers/input/misc/Makefile
> >> +++ b/drivers/input/misc/Makefile
> >> @@ -65,6 +65,7 @@ obj-$(CONFIG_INPUT_PMIC8XXX_PWRKEY)	+= pmic8xxx-pwrkey.o
> >>  obj-$(CONFIG_INPUT_POWERMATE)		+= powermate.o
> >>  obj-$(CONFIG_INPUT_PWM_BEEPER)		+= pwm-beeper.o
> >>  obj-$(CONFIG_INPUT_PWM_VIBRA)		+= pwm-vibra.o
> >> +obj-$(CONFIG_INPUT_QPNP_HAPTICS)	+= qpnp-haptics.o
> >>  obj-$(CONFIG_INPUT_RAVE_SP_PWRBUTTON)	+= rave-sp-pwrbutton.o
> >>  obj-$(CONFIG_INPUT_RB532_BUTTON)	+= rb532_button.o
> >>  obj-$(CONFIG_INPUT_REGULATOR_HAPTIC)	+= regulator-haptic.o
> >> diff --git a/drivers/input/misc/qpnp-haptics.c b/drivers/input/misc/qpnp-haptics.c
> >
> > Again, qcom-spmi-haptics.c
> >
> >> new file mode 100644
> >> index 000000000000..daa7a18ffc7d
> >> --- /dev/null
> >> +++ b/drivers/input/misc/qpnp-haptics.c
> >> @@ -0,0 +1,1022 @@
> >> +// SPDX-License-Identifier: GPL-2.0-only
> >> +/*
> >> + * Copyright (c) 2021, Caleb Connolly <caleb@...nolly.tech>
> >> + * Qualcomm Plug and Play haptics driver for pmi8998 and related PMICs.
> >> + * Based on ./pm8xxx-vibrator.c
> >
> > Enough "based on" to warrant carrying some copyrights?
> Hmm, I only stole the input device parts, so perhaps not.

Then I think you can drop this comment as well.

Regards,
Bjorn