From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dmitry Torokhov Subject: [PATCH 2/2] spi: wire up wakeup-source/wakeirq handling Date: Mon, 11 Nov 2019 21:54:11 -0800 Message-ID: <20191112055412.192675-3-dmitry.torokhov@gmail.com> References: <20191112055412.192675-1-dmitry.torokhov@gmail.com> Mime-Version: 1.0 Content-Transfer-Encoding: 8bit Cc: linux-kernel@vger.kernel.org, linux-spi@vger.kernel.org To: Mark Brown Return-path: In-Reply-To: <20191112055412.192675-1-dmitry.torokhov@gmail.com> Sender: linux-kernel-owner@vger.kernel.org List-Id: linux-spi.vger.kernel.org Many SPI drivers need to configure their devices for waking up the system. Instead of forcing them to reimplement wakeup handling, let's mirror what I2C core is doing and handle "wakeup-source" device property in SPI core. Also, let's allow naming device's interrupt lines as "irq" and "wakeup" and automatically configure the right one as wakeirq when device is supposed to be a wakeup source. Implementing this is very helpful for drivers that use both I2C and SPI for transport, such as tsc2004/tsc2005. Signed-off-by: Dmitry Torokhov --- drivers/spi/spi.c | 27 ++++++++++++++++++++++++++- 1 file changed, 26 insertions(+), 1 deletion(-) diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c index 50769a8475d66..baa7aac300d9f 100644 --- a/drivers/spi/spi.c +++ b/drivers/spi/spi.c @@ -22,6 +22,7 @@ #include #include #include +#include #include #include #include @@ -394,13 +395,37 @@ static int spi_drv_probe(struct device *dev) return ret; if (dev->of_node) { - spi->irq = of_irq_get(dev->of_node, 0); + spi->irq = of_irq_get_byname(dev->of_node, "irq"); + if (spi->irq == -EINVAL || spi->irq == -ENODATA) + spi->irq = of_irq_get(dev->of_node, 0); if (spi->irq == -EPROBE_DEFER) return -EPROBE_DEFER; if (spi->irq < 0) spi->irq = 0; } + if (device_property_read_bool(dev, "wakeup-source")) { + int wakeirq = -ENOENT; + + if (dev->of_node) { + wakeirq = of_irq_get_byname(dev->of_node, "wakeup"); + if (wakeirq == -EPROBE_DEFER) + return wakeirq; + } + + device_init_wakeup(dev, true); + + if (wakeirq > 0 && wakeirq != spi->irq) + ret = dev_pm_set_dedicated_wake_irq(dev, wakeirq); + else if (spi->irq > 0) + ret = dev_pm_set_wake_irq(dev, spi->irq); + else + ret = 0; + + if (ret) + dev_warn(dev, "failed to set up wakeup irq: %d\n", ret); + } + ret = dev_pm_domain_attach(dev, true); if (ret) return ret; -- 2.24.0.rc1.363.gb1bccd3e3d-goog