From mboxrd@z Thu Jan 1 00:00:00 1970 From: Thierry Reding Subject: [PATCH v3 0/2] Implement wake event support on Tegra186 and later Date: Wed, 29 May 2019 16:53:20 +0200 Message-ID: <20190529145322.20630-1-thierry.reding@gmail.com> Mime-Version: 1.0 Content-Transfer-Encoding: 8bit Return-path: Sender: linux-kernel-owner@vger.kernel.org To: Linus Walleij Cc: Thomas Gleixner , Lina Iyer , Jon Hunter , Sowjanya Komatineni , Bitan Biswas , linux-gpio@vger.kernel.org, linux-tegra@vger.kernel.org, linux-kernel@vger.kernel.org List-Id: linux-tegra@vger.kernel.org From: Thierry Reding Hi, The following is a set of patches that allow certain interrupts to be used as wakeup sources on Tegra186 and later. To implement this, each of the GPIO controllers' IRQ domain needs to become hierarchical, and parented to the PMC domain. The PMC domain in turn implements a new IRQ domain that is a child to the GIC IRQ domain. The above ensures that the interrupt chip implementation of the PMC is called at the correct time. The ->irq_set_type() and ->irq_set_wake() implementations program the PMC wake registers in a way to enable the given interrupts as wakeup sources. This is based on a suggestion from Thomas Gleixner that resulted from the following thread: https://lkml.org/lkml/2018/9/13/1042 Changes in v3: - use irq_create_fwspec_mapping() instead of irq_domain_alloc_irqs() - drop preparatory patch exporting irq_domain_alloc_irqs() - properly set GPIO instance on Tegra186 Changes in v2: - dropped the Tegra PMC specific patches to simplify the series - drop wakeup-parent usage, lookup up PMC by compatible - convert Tegra186 GPIO driver to use valid mask - move hierarchy support code into gpiolib core Linus, this is a new revision based on our previous discussion. Sorry it took so long to get back to this. I also verified that with this series I can make things work with gpio-keys whether I use the "gpios" property or the "interrupts" property, which was your primary concern. I'm also adding Lina to the thread since she's been basing her QCOM series on top of this patch. Lina, it'd be great if you could confirm that the changes I made in this version continue to work for you. Thierry Thierry Reding (2): gpio: Add support for hierarchical IRQ domains gpio: tegra186: Implement wake event support drivers/gpio/Kconfig | 1 + drivers/gpio/gpio-tegra186.c | 120 +++++++++++++++++++++++++++++++---- drivers/gpio/gpiolib.c | 33 ++++++++-- include/linux/gpio/driver.h | 8 +++ 4 files changed, 144 insertions(+), 18 deletions(-) -- 2.21.0