From b30f2f65568f840e5ca522d98ba2ad73b8f59cde Mon Sep 17 00:00:00 2001 From: Hans de Goede Date: Sat, 6 Oct 2018 10:25:39 +0200 Subject: i2c: designware: Set IRQF_NO_SUSPEND flag for all BYT and CHT controllers On some Cherry Trail systems the GPU ACPI fwnode has power-resources which point to the PMIC, which is connected over a LPSS I2C controller. The GPU is a PCI device and PCI devices are powered-on at the resume_noirq resume phase. Since the GPU power-resources need the I2C controller, recent acpi_lpss.c changes now also power-up the LPSS I2C controllers on BYT and CHT devices in the resume_noirq resume phase. But during this phase the IRQ of the controller is disabled leading to these errors: i2c_designware 808622C1:06: controller timed out ACPI Error: AE_ERROR, Returned by Handler for [UserDefinedRegion] ACPI Error: Method parse/execution failed \_SB.P18W._ON, AE_ERROR video LNXVIDEO:00: Failed to change power state to D0 This commit makes the i2c-designware controller set the IRQF_NO_SUSPEND flag when requesting the interrupt on BYT and CHT devices, so that the IRQ is left enabled during the noirq phase, fixing this. Tested-by: Jarkko Nikula Acked-by: Jarkko Nikula Reviewed-by: Andy Shevchenko Signed-off-by: Hans de Goede Reviewed-by: Mika Westerberg Signed-off-by: Wolfram Sang --- drivers/i2c/busses/i2c-designware-core.h | 1 + drivers/i2c/busses/i2c-designware-master.c | 2 +- drivers/i2c/busses/i2c-designware-platdrv.c | 4 ++-- 3 files changed, 4 insertions(+), 3 deletions(-) diff --git a/drivers/i2c/busses/i2c-designware-core.h b/drivers/i2c/busses/i2c-designware-core.h index fb40d76639da..9ec8394f4787 100644 --- a/drivers/i2c/busses/i2c-designware-core.h +++ b/drivers/i2c/busses/i2c-designware-core.h @@ -278,6 +278,7 @@ struct dw_i2c_dev { #define ACCESS_SWAP 0x00000001 #define ACCESS_16BIT 0x00000002 #define ACCESS_INTR_MASK 0x00000004 +#define ACCESS_NO_IRQ_SUSPEND 0x00000008 #define MODEL_CHERRYTRAIL 0x00000100 #define MODEL_MSCC_OCELOT 0x00000200 diff --git a/drivers/i2c/busses/i2c-designware-master.c b/drivers/i2c/busses/i2c-designware-master.c index 2ccb527735f9..2a630ac35ba2 100644 --- a/drivers/i2c/busses/i2c-designware-master.c +++ b/drivers/i2c/busses/i2c-designware-master.c @@ -707,7 +707,7 @@ int i2c_dw_probe(struct dw_i2c_dev *dev) adap->dev.parent = dev->dev; i2c_set_adapdata(adap, dev); - if (dev->shared_with_punit) { + if (dev->flags & ACCESS_NO_IRQ_SUSPEND) { irq_flags = IRQF_NO_SUSPEND; } else { irq_flags = IRQF_SHARED | IRQF_COND_SUSPEND; diff --git a/drivers/i2c/busses/i2c-designware-platdrv.c b/drivers/i2c/busses/i2c-designware-platdrv.c index 51cb17287c47..997bbb3d925f 100644 --- a/drivers/i2c/busses/i2c-designware-platdrv.c +++ b/drivers/i2c/busses/i2c-designware-platdrv.c @@ -123,8 +123,8 @@ static const struct acpi_device_id dw_i2c_acpi_match[] = { { "INT33C3", 0 }, { "INT3432", 0 }, { "INT3433", 0 }, - { "80860F41", 0 }, - { "808622C1", MODEL_CHERRYTRAIL }, + { "80860F41", ACCESS_NO_IRQ_SUSPEND }, + { "808622C1", ACCESS_NO_IRQ_SUSPEND | MODEL_CHERRYTRAIL }, { "AMD0010", ACCESS_INTR_MASK }, { "AMDI0010", ACCESS_INTR_MASK }, { "AMDI0510", 0 }, -- cgit v1.2.3