Mandatorily set the initdata->supply_regulator while it actually not
exist will cause regulator core to resolve supply each time whenever
a new regulator registered which is meaningless and waste CPU mips.
We can observe more than one hundred times of iteration of resolving
during a MX6Q SDB board booting up.
This patch adds the condition check for vin-supply to avoid the issue.
Cc: Liam Girdwood <lgirdw...@gmail.com>
Cc: Mark Brown <broo...@kernel.org>
Cc: Shawn Guo <shawn...@kernel.org>
Cc: Sascha Hauer <ker...@pengutronix.de>
Cc: Robin Gong <yibin.g...@nxp.com>
Signed-off-by: Dong Aisheng <aisheng.d...@nxp.com>
---
drivers/regulator/anatop-regulator.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/regulator/anatop-regulator.c
b/drivers/regulator/anatop-regulator.c
index 46b9c2c..2a97ada 100644
--- a/drivers/regulator/anatop-regulator.c
+++ b/drivers/regulator/anatop-regulator.c
@@ -203,7 +203,9 @@ static int anatop_regulator_probe(struct platform_device
*pdev)
if (!initdata)
return -ENOMEM;
- initdata->supply_regulator = "vin";
+ if (of_find_property(np, "vin-supply", NULL))
+ initdata->supply_regulator = "vin";
+
sreg->initdata = initdata;
anatop_np = of_get_parent(np);
--
2.7.4
