From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750922AbdAXSkO (ORCPT ); Tue, 24 Jan 2017 13:40:14 -0500 Received: from mezzanine.sirena.org.uk ([106.187.55.193]:35042 "EHLO mezzanine.sirena.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750883AbdAXSkK (ORCPT ); Tue, 24 Jan 2017 13:40:10 -0500 From: Mark Brown To: Jan Kiszka Cc: Robert Jarzmik , Mark Brown , Mark Brown , Robert Jarzmik , linux-spi@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Daniel Mack , Haojian Zhuang , linux-kernel@vger.kernel.org, Andy Shevchenko , Mika Westerberg , Jarkko Nikula , Sascha Weisenberger , linux-spi@vger.kernel.org In-Reply-To: <7e5fb21d-35bd-6ac3-9e6f-cffed656997f@siemens.com> Message-Id: Date: Tue, 24 Jan 2017 18:39:51 +0000 X-SA-Exim-Connect-IP: 2001:470:1f1d:6b5::3 X-SA-Exim-Mail-From: broonie@sirena.org.uk Subject: Applied "spi: pxa2xx: Prepare for edge-triggered interrupts" to the spi tree X-SA-Exim-Version: 4.2.1 (built Mon, 26 Dec 2011 16:24:06 +0000) X-SA-Exim-Scanned: No (on mezzanine.sirena.org.uk); Unknown failure Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The patch spi: pxa2xx: Prepare for edge-triggered interrupts has been applied to the spi tree at git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git All being well this means that it will be integrated into the linux-next tree (usually sometime in the next 24 hours) and sent to Linus during the next merge window (or sooner if it is a bug fix), however if problems are discovered then the patch may be dropped or reverted. You may get further e-mails resulting from automated or manual testing and review of the tree, please engage with people reporting problems and send followup patches addressing any issues that are reported if needed. If any updates are required or you are submitting further changes they should be sent as incremental updates against current git, existing patches will not be replaced. Please add any relevant lists and maintainers to the CCs when replying to this mail. Thanks, Mark >>From e51e9b93049f624c179bab2c651995bca22b5bb7 Mon Sep 17 00:00:00 2001 From: Jan Kiszka Date: Sat, 21 Jan 2017 10:06:38 +0100 Subject: [PATCH] spi: pxa2xx: Prepare for edge-triggered interrupts When using the a device with edge-triggered interrupts, such as MSIs, the interrupt handler has to ensure that there is a point in time during its execution where all interrupts sources are silent so that a new event can trigger a new interrupt again. This is achieved here by disabling all interrupt sources for a moment before processing them according to the status register. If a new interrupt should have arrived after we read the status, it will now re-trigger the interrupt, even in edge mode. Signed-off-by: Jan Kiszka Acked-by: Robert Jarzmik Signed-off-by: Mark Brown --- drivers/spi/spi-pxa2xx.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/spi/spi-pxa2xx.c b/drivers/spi/spi-pxa2xx.c index 8c65bc1823f3..06ade434c083 100644 --- a/drivers/spi/spi-pxa2xx.c +++ b/drivers/spi/spi-pxa2xx.c @@ -785,6 +785,9 @@ static irqreturn_t ssp_int(int irq, void *dev_id) if (!(status & mask)) return IRQ_NONE; + pxa2xx_spi_write(drv_data, SSCR1, sccr1_reg & ~drv_data->int_cr1); + pxa2xx_spi_write(drv_data, SSCR1, sccr1_reg); + if (!drv_data->master->cur_msg) { handle_bad_msg(drv_data); /* Never fail */ -- 2.11.0 From mboxrd@z Thu Jan 1 00:00:00 1970 From: broonie@kernel.org (Mark Brown) Date: Tue, 24 Jan 2017 18:39:51 +0000 Subject: Applied "spi: pxa2xx: Prepare for edge-triggered interrupts" to the spi tree In-Reply-To: <7e5fb21d-35bd-6ac3-9e6f-cffed656997f@siemens.com> Message-ID: To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org The patch spi: pxa2xx: Prepare for edge-triggered interrupts has been applied to the spi tree at git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git All being well this means that it will be integrated into the linux-next tree (usually sometime in the next 24 hours) and sent to Linus during the next merge window (or sooner if it is a bug fix), however if problems are discovered then the patch may be dropped or reverted. You may get further e-mails resulting from automated or manual testing and review of the tree, please engage with people reporting problems and send followup patches addressing any issues that are reported if needed. If any updates are required or you are submitting further changes they should be sent as incremental updates against current git, existing patches will not be replaced. Please add any relevant lists and maintainers to the CCs when replying to this mail. Thanks, Mark >>From e51e9b93049f624c179bab2c651995bca22b5bb7 Mon Sep 17 00:00:00 2001 From: Jan Kiszka Date: Sat, 21 Jan 2017 10:06:38 +0100 Subject: [PATCH] spi: pxa2xx: Prepare for edge-triggered interrupts When using the a device with edge-triggered interrupts, such as MSIs, the interrupt handler has to ensure that there is a point in time during its execution where all interrupts sources are silent so that a new event can trigger a new interrupt again. This is achieved here by disabling all interrupt sources for a moment before processing them according to the status register. If a new interrupt should have arrived after we read the status, it will now re-trigger the interrupt, even in edge mode. Signed-off-by: Jan Kiszka Acked-by: Robert Jarzmik Signed-off-by: Mark Brown --- drivers/spi/spi-pxa2xx.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/spi/spi-pxa2xx.c b/drivers/spi/spi-pxa2xx.c index 8c65bc1823f3..06ade434c083 100644 --- a/drivers/spi/spi-pxa2xx.c +++ b/drivers/spi/spi-pxa2xx.c @@ -785,6 +785,9 @@ static irqreturn_t ssp_int(int irq, void *dev_id) if (!(status & mask)) return IRQ_NONE; + pxa2xx_spi_write(drv_data, SSCR1, sccr1_reg & ~drv_data->int_cr1); + pxa2xx_spi_write(drv_data, SSCR1, sccr1_reg); + if (!drv_data->master->cur_msg) { handle_bad_msg(drv_data); /* Never fail */ -- 2.11.0