diff options
| -rw-r--r-- | drivers/misc/lis3lv02d/lis3lv02d.c | 36 | ||||
| -rw-r--r-- | drivers/misc/lis3lv02d/lis3lv02d.h | 2 | ||||
| -rw-r--r-- | drivers/platform/x86/hp_accel.c | 3 |
3 files changed, 32 insertions, 9 deletions
diff --git a/drivers/misc/lis3lv02d/lis3lv02d.c b/drivers/misc/lis3lv02d/lis3lv02d.c index 8b51cd62d067..1fc671566562 100644 --- a/drivers/misc/lis3lv02d/lis3lv02d.c +++ b/drivers/misc/lis3lv02d/lis3lv02d.c @@ -206,6 +206,18 @@ static int lis3lv02d_get_odr(void) return lis3_dev.odrs[(ctrl >> shift)]; } +static int lis3lv02d_get_pwron_wait(struct lis3lv02d *lis3) +{ + int div = lis3lv02d_get_odr(); + + if (WARN_ONCE(div == 0, "device returned spurious data")) + return -ENXIO; + + /* LIS3 power on delay is quite long */ + msleep(lis3->pwron_delay / div); + return 0; +} + static int lis3lv02d_set_odr(int rate) { u8 ctrl; @@ -266,7 +278,9 @@ static int lis3lv02d_selftest(struct lis3lv02d *lis3, s16 results[3]) lis3->read(lis3, ctlreg, ®); lis3->write(lis3, ctlreg, (reg | selftest)); - msleep(lis3->pwron_delay / lis3lv02d_get_odr()); + ret = lis3lv02d_get_pwron_wait(lis3); + if (ret) + goto fail; /* Read directly to avoid axis remap */ x = lis3->read_data(lis3, OUTX); @@ -275,7 +289,9 @@ static int lis3lv02d_selftest(struct lis3lv02d *lis3, s16 results[3]) /* back to normal settings */ lis3->write(lis3, ctlreg, reg); - msleep(lis3->pwron_delay / lis3lv02d_get_odr()); + ret = lis3lv02d_get_pwron_wait(lis3); + if (ret) + goto fail; results[0] = x - lis3->read_data(lis3, OUTX); results[1] = y - lis3->read_data(lis3, OUTY); @@ -363,8 +379,9 @@ void lis3lv02d_poweroff(struct lis3lv02d *lis3) } EXPORT_SYMBOL_GPL(lis3lv02d_poweroff); -void lis3lv02d_poweron(struct lis3lv02d *lis3) +int lis3lv02d_poweron(struct lis3lv02d *lis3) { + int err; u8 reg; lis3->init(lis3); @@ -384,11 +401,14 @@ void lis3lv02d_poweron(struct lis3lv02d *lis3) lis3->write(lis3, CTRL_REG2, reg); } - /* LIS3 power on delay is quite long */ - msleep(lis3->pwron_delay / lis3lv02d_get_odr()); + err = lis3lv02d_get_pwron_wait(lis3); + if (err) + return err; if (lis3->reg_ctrl) lis3_context_restore(lis3); + + return 0; } EXPORT_SYMBOL_GPL(lis3lv02d_poweron); @@ -928,7 +948,11 @@ int lis3lv02d_init_device(struct lis3lv02d *dev) atomic_set(&dev->wake_thread, 0); lis3lv02d_add_fs(dev); - lis3lv02d_poweron(dev); + err = lis3lv02d_poweron(dev); + if (err) { + lis3lv02d_remove_fs(dev); + return err; + } if (dev->pm_dev) { pm_runtime_set_active(dev->pm_dev); diff --git a/drivers/misc/lis3lv02d/lis3lv02d.h b/drivers/misc/lis3lv02d/lis3lv02d.h index a1939589eb2c..57c64bbcf5f7 100644 --- a/drivers/misc/lis3lv02d/lis3lv02d.h +++ b/drivers/misc/lis3lv02d/lis3lv02d.h @@ -285,7 +285,7 @@ int lis3lv02d_init_device(struct lis3lv02d *lis3); int lis3lv02d_joystick_enable(void); void lis3lv02d_joystick_disable(void); void lis3lv02d_poweroff(struct lis3lv02d *lis3); -void lis3lv02d_poweron(struct lis3lv02d *lis3); +int lis3lv02d_poweron(struct lis3lv02d *lis3); int lis3lv02d_remove_fs(struct lis3lv02d *lis3); extern struct lis3lv02d lis3_dev; diff --git a/drivers/platform/x86/hp_accel.c b/drivers/platform/x86/hp_accel.c index 1b52d00e2f90..891e71f75f56 100644 --- a/drivers/platform/x86/hp_accel.c +++ b/drivers/platform/x86/hp_accel.c @@ -354,8 +354,7 @@ static int lis3lv02d_suspend(struct acpi_device *device, pm_message_t state) static int lis3lv02d_resume(struct acpi_device *device) { - lis3lv02d_poweron(&lis3_dev); - return 0; + return lis3lv02d_poweron(&lis3_dev); } #else #define lis3lv02d_suspend NULL |