pwm: Send a uevent on the pwmchip device upon channel sysfs (un)export

[linux.git] / drivers / pwm / pwm-lpss-platform.c

diff --git a/drivers/pwm/pwm-lpss-platform.c b/drivers/pwm/pwm-lpss-platform.c
index 5561b9e190f84a63513ff3b86ecbeef7461404e8..b6edf8af26cc9819537d103f23e70bcd4763375f 100644 (file)
--- a/drivers/pwm/pwm-lpss-platform.c
+++ b/drivers/pwm/pwm-lpss-platform.c
@@ -30,6 +30,7 @@ static const struct pwm_lpss_boardinfo pwm_lpss_bsw_info = {
        .clk_rate = 19200000,
        .npwm = 1,
        .base_unit_bits = 16,
+       .check_power_on_resume = true,
 };
 
 /* Broxton */
@@ -74,13 +75,32 @@ static int pwm_lpss_remove_platform(struct platform_device *pdev)
        return pwm_lpss_remove(lpwm);
 }
 
-static SIMPLE_DEV_PM_OPS(pwm_lpss_platform_pm_ops,
-                        pwm_lpss_suspend,
-                        pwm_lpss_resume);
+static void pwm_lpss_complete(struct device *dev)
+{
+       struct pwm_lpss_chip *lpwm = dev_get_drvdata(dev);
+       int ret, state;
+
+       /* The PWM may be turned on by AML code, update our state to match */
+       if (pm_runtime_suspended(dev) && lpwm->info->check_power_on_resume) {
+               pm_runtime_disable(dev);
+
+               ret = acpi_device_get_power(ACPI_COMPANION(dev), &state);
+               if (ret == 0 && state == ACPI_STATE_D0)
+                       pm_runtime_set_active(dev);
+
+               pm_runtime_enable(dev);
+       }
+}
+
+static const struct dev_pm_ops pwm_lpss_platform_pm_ops = {
+       .complete = pwm_lpss_complete,
+       SET_SYSTEM_SLEEP_PM_OPS(pwm_lpss_suspend, pwm_lpss_resume)
+};
 
 static const struct acpi_device_id pwm_lpss_acpi_match[] = {
        { "80860F09", (unsigned long)&pwm_lpss_byt_info },
        { "80862288", (unsigned long)&pwm_lpss_bsw_info },
+       { "80862289", (unsigned long)&pwm_lpss_bsw_info },
        { "80865AC8", (unsigned long)&pwm_lpss_bxt_info },
        { },
 };