From: Ye Li <ye.li@nxp.com>
Date: Tue, 19 Feb 2019 07:48:02 +0000 (-0800)
Subject: MLK-20945-2 dm: device: Check the power up result in probe
X-Git-Tag: rel_imx_4.19.35_1.1.0~576
X-Git-Url: https://git.somdevices.com/?a=commitdiff_plain;h=f958ee4917eac68b2c46e1bdbaaf42c6a44e663d;p=u-boot.git

MLK-20945-2 dm: device: Check the power up result in probe

If a device has relevant power domain, we will check the power up
result in probing the device. If the power up is failed, the device_probe
will return failure immediately.

The only exception is the new FLAG (DM_FLAG_IGNORE_POWER_ON) is set by driver
to indicate ignore the power up result.

Signed-off-by: Ye Li <ye.li@nxp.com>
(cherry picked from commit 8524ca764d8fbd05da1593abfed62bb075c50cd4)
---

diff --git a/drivers/core/device.c b/drivers/core/device.c
index 24fa3eeedb..08a2761d32 100644
--- a/drivers/core/device.c
+++ b/drivers/core/device.c
@@ -389,8 +389,15 @@ int device_probe(struct udevice *dev)
 		pinctrl_select_state(dev, "default");
 
 	if (dev->parent && device_get_uclass_id(dev) != UCLASS_POWER_DOMAIN) {
-		if (!power_domain_get(dev, &pd))
-			power_domain_on(&pd);
+		if (!power_domain_get(dev, &pd)) {
+			if (!(dev->driver->flags & DM_FLAG_IGNORE_POWER_ON)) {
+				ret = power_domain_on(&pd);
+				if (ret) {
+					power_domain_free(&pd);
+					goto fail;
+				}
+			}
+		}
 	}
 
 	ret = uclass_pre_probe_device(dev);
diff --git a/include/dm/device.h b/include/dm/device.h
index fdf3889532..f2b7c2a816 100644
--- a/include/dm/device.h
+++ b/include/dm/device.h
@@ -61,6 +61,9 @@ struct driver_info;
  */
 #define DM_FLAG_OS_PREPARE		(1 << 10)
 
+/* DM should ignore the power domain on for this driver */
+#define DM_FLAG_IGNORE_POWER_ON		(1 << 11)
+
 /* DM should ignore the assign default clocks for this driver */
 #define DM_FLAG_IGNORE_DEFAULT_CLKS		(1 << 12)