[PATCH AUTOSEL 4.19 56/64] i2c: omap: Use noirq system sleep pm ops to idle device for suspend

From: Sasha Levin
Date: Thu Feb 28 2019 - 10:13:33 EST

From: Tony Lindgren <tony@xxxxxxxxxxx>

[ Upstream commit c6e2bd956936d925748581e4d0294f10f1d92f2c ]

We currently get the following error with pixcir_ts driver during a
suspend resume cycle:

omap_i2c 4802a000.i2c: controller timed out
pixcir_ts 1-005c: pixcir_int_enable: can't read reg 0x34 : -110
pixcir_ts 1-005c: Failed to disable interrupt generation: -110
pixcir_ts 1-005c: Failed to stop
dpm_run_callback(): pixcir_i2c_ts_resume+0x0/0x98
[pixcir_i2c_ts] returns -110
PM: Device 1-005c failed to resume: error -110

And at least am437x based devices with pixcir_ts will fail to resume
to a touchscreen that is configured as the wakeup-source in device
tree for these devices.

This is because pixcir_ts tries to reconfigure it's registers for
noirq suspend which fails. This also leaves i2c-omap in enabled state
for suspend.

Let's fix the pixcir_ts issue and make sure i2c-omap is suspended by

Let's also get rid of some ifdefs while at it and replace them with
already deal with the various PM Kconfig options.

Reported-by: Keerthy <j-keerthy@xxxxxx>
Signed-off-by: Tony Lindgren <tony@xxxxxxxxxxx>
Acked-by: Vignesh R <vigneshr@xxxxxx>
Signed-off-by: Wolfram Sang <wsa@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
drivers/i2c/busses/i2c-omap.c | 13 +++++--------
1 file changed, 5 insertions(+), 8 deletions(-)

diff --git a/drivers/i2c/busses/i2c-omap.c b/drivers/i2c/busses/i2c-omap.c
index 65d06a8193074..2ac86096ddd95 100644
--- a/drivers/i2c/busses/i2c-omap.c
+++ b/drivers/i2c/busses/i2c-omap.c
@@ -1498,8 +1498,7 @@ static int omap_i2c_remove(struct platform_device *pdev)
return 0;

-#ifdef CONFIG_PM
-static int omap_i2c_runtime_suspend(struct device *dev)
+static int __maybe_unused omap_i2c_runtime_suspend(struct device *dev)
struct omap_i2c_dev *omap = dev_get_drvdata(dev);

@@ -1525,7 +1524,7 @@ static int omap_i2c_runtime_suspend(struct device *dev)
return 0;

-static int omap_i2c_runtime_resume(struct device *dev)
+static int __maybe_unused omap_i2c_runtime_resume(struct device *dev)
struct omap_i2c_dev *omap = dev_get_drvdata(dev);

@@ -1540,20 +1539,18 @@ static int omap_i2c_runtime_resume(struct device *dev)

static const struct dev_pm_ops omap_i2c_pm_ops = {
+ SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
+ pm_runtime_force_resume)
omap_i2c_runtime_resume, NULL)
-#define OMAP_I2C_PM_OPS (&omap_i2c_pm_ops)
-#endif /* CONFIG_PM */

static struct platform_driver omap_i2c_driver = {
.probe = omap_i2c_probe,
.remove = omap_i2c_remove,
.driver = {
.name = "omap_i2c",
- .pm = OMAP_I2C_PM_OPS,
+ .pm = &omap_i2c_pm_ops,
.of_match_table = of_match_ptr(omap_i2c_of_match),