From mboxrd@z Thu Jan 1 00:00:00 1970 From: vladimir_zapolskiy@mentor.com (Vladimir Zapolskiy) Date: Fri, 2 Sep 2016 16:11:46 +0300 Subject: [PATCH 0/3] gpio/pinctrl: imx: let IOMUX controller know about on-SoC GPIOs In-Reply-To: <1471644615-10320-1-git-send-email-vladimir_zapolskiy@mentor.com> References: <1471644615-10320-1-git-send-email-vladimir_zapolskiy@mentor.com> Message-ID: To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Hi Shawn, Fabio, On 08/20/2016 01:10 AM, Vladimir Zapolskiy wrote: > The change establishes a connection between on-SoC IOMUX controller(s) > and GPIO controllers found on some SoC from Freescale/NXP iMX series, > if a GPIO controller device node contains common gpio-ranges information. > > The change is backward compatible with respect to potentially not updated > outdated DTB data without gpio-ranges propery, for such boards the only > functional change is lowered initcall priority of GPIO controller driver, > which in general anyway is exected to be used only after pinctrl/pinmux > controller. > > If this change is applied the next interesting applications may be done > as a follow-up work, for example switching pad function to GPIO on gpiod > request, converting iomux controller driver to strict type and so on. > > For actual values of gpio-ranges properties please reference series > "ARM: dts: imx: add gpio-ranges properties to some iMX GPIO controllers" > http://archive.arm.linux.org.uk/lurker/message/20160819.220621.86d845d1.en.html > > Deepak Das (1): > gpio: mxc: lower level of gpio_mxc_init() initcall > > Vladimir Zapolskiy (2): > pinctrl: imx: accept gpio request/free from pinctrl > gpio: mxc: add generic gpio request/free callbacks to pinctrl > > drivers/gpio/gpio-mxc.c | 7 ++++++- > drivers/pinctrl/freescale/pinctrl-imx.c | 4 ++-- > 2 files changed, 8 insertions(+), 3 deletions(-) > no comments so far, please could you express your concerns about this change? IMHO it would be nice to have this feature enabled in v4.9. I assume that the most worrisome commit is the change of GPIO controller driver init level, but I belive it is safe enough, no? Thank you. -- With best wishes, Vladimir