From mboxrd@z Thu Jan 1 00:00:00 1970 From: maxime.ripard@free-electrons.com (Maxime Ripard) Date: Mon, 25 Jul 2016 11:55:32 +0200 Subject: [PATCH v2 3/4] mfd: add support for Allwinner SoCs ADC In-Reply-To: <20160722135556.GG14925@dell> References: <1468576754-3273-1-git-send-email-quentin.schulz@free-electrons.com> <1468576754-3273-4-git-send-email-quentin.schulz@free-electrons.com> <20160719073109.GD17074@dell> <20160721121253.GE14925@dell> <20160721200802.GL5993@lukather> <20160722135556.GG14925@dell> Message-ID: <20160725095532.GK7419@lukather> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Fri, Jul 22, 2016 at 02:55:56PM +0100, Lee Jones wrote: > On Thu, 21 Jul 2016, Maxime Ripard wrote: > > > 1;4205;0c > > On Thu, Jul 21, 2016 at 01:12:53PM +0100, Lee Jones wrote: > > > On Wed, 20 Jul 2016, Jonathan Cameron wrote: > > > > > > > On 19/07/16 08:31, Lee Jones wrote: > > > > > On Mon, 18 Jul 2016, Jonathan Cameron wrote: > > > > > > > > > >> On 15/07/16 10:59, Quentin Schulz wrote: > > > > >>> The Allwinner SoCs all have an ADC that can also act as a touchscreen > > > > >>> controller and a thermal sensor. For now, only the ADC and the thermal > > > > >>> sensor drivers are probed by the MFD, the touchscreen controller support > > > > >>> will be added later. > > > > >>> > > > > >>> Signed-off-by: Quentin Schulz > > > > >> Hmm. Previous patch includes the header this one creates. Ordering issue? > > > > >> The depends kind of prevents build failures by ensuring that can't be built > > > > >> until this one is in place, but it is certainly an ugly way to do it. > > > > >> > > > > >> Few little bits innline. > > > > >>> --- > > > > >>> > > > > >>> v2: > > > > >>> - add license headers, > > > > >>> - reorder alphabetically includes, > > > > >>> - add SUNXI_GPADC_ prefixes for defines, > > > > >>> > > > > >>> drivers/mfd/Kconfig | 14 +++ > > > > >>> drivers/mfd/Makefile | 2 + > > > > >>> drivers/mfd/sunxi-gpadc-mfd.c | 197 ++++++++++++++++++++++++++++++++++++ > > > > >>> include/linux/mfd/sunxi-gpadc-mfd.h | 23 +++++ > > > > >>> 4 files changed, 236 insertions(+) > > > > >>> create mode 100644 drivers/mfd/sunxi-gpadc-mfd.c > > > > >>> create mode 100644 include/linux/mfd/sunxi-gpadc-mfd.h > > > > > > > > > > [...] > > > > > > > > > >>> +static struct mfd_cell sun6i_gpadc_mfd_cells[] = { > > > > >>> + { > > > > >>> + .name = "sun6i-a31-gpadc-iio", > > > > >>> + .resources = adc_resources, > > > > >>> + .num_resources = ARRAY_SIZE(adc_resources), > > > > >>> + }, { > > > > >>> + .name = "iio_hwmon", > > > > >> I still really dislike using this to force the probe of that driver but > > > > >> kind of up to the hwmon / mfd guys on this. > > > > > > > > > > Can you at least say *why* you don't like it? > > > > It just feels odd to have an mfd child that isn't really dependent > > > > on the mfd hardware itself. > > > > > > > > Still if you are happy, mfd is your domain and my objections were > > > > as you probably noticed not that strong - or well described!) > > > > > > > > So I'm fine with this. > > > > > > I see. So it's not actually part of the same IP/chip? > > > > The chip has a temperature sensor, and we want to expose that > > temperature through IIO. > > > > But we don't really have the choice on how we probe iio-hwmon > > here. The binding was already there, and we have to keep it. > > What binding? The binding introduced for the original driver this serie aims to replace: https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/Documentation/devicetree/bindings/input/touchscreen/sun4i.txt Maxime -- Maxime Ripard, Free Electrons Embedded Linux and Kernel engineering http://free-electrons.com -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 819 bytes Desc: not available URL: