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authorMarkus Pargmann <mpa@pengutronix.de>2014-10-06 21:33:36 +0200
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2015-01-08 10:27:45 -0800
commit41fe43101ff9263551c252207927a81f10ea4679 (patch)
tree50b2c44bc886d260676f587a73163c98e8498655 /drivers
parent6baaba8f47e34451f7859eab4814e1498e75f3bf (diff)
regulator: anatop: Set default voltage selector for vddpu
commit fe08be3ec8672ed92b3ed1b85810df9fa0f98931 upstream. The code reads the default voltage selector from its register. If the bootloader disables the regulator, the default voltage selector will be 0 which results in faulty behaviour of this regulator driver. This patch sets a default voltage selector for vddpu if it is not set in the register. Signed-off-by: Markus Pargmann <mpa@pengutronix.de> Signed-off-by: Mark Brown <broonie@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/regulator/anatop-regulator.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/regulator/anatop-regulator.c b/drivers/regulator/anatop-regulator.c
index 4f730af70e7c..30e8d7ad5813 100644
--- a/drivers/regulator/anatop-regulator.c
+++ b/drivers/regulator/anatop-regulator.c
@@ -283,6 +283,14 @@ static int anatop_regulator_probe(struct platform_device *pdev)
sreg->sel = 0;
sreg->bypass = true;
}
+
+ /*
+ * In case vddpu was disabled by the bootloader, we need to set
+ * a sane default until imx6-cpufreq was probed and changes the
+ * voltage to the correct value. In this case we set 1.25V.
+ */
+ if (!sreg->sel && !strcmp(sreg->name, "vddpu"))
+ sreg->sel = 22;
} else {
rdesc->ops = &anatop_rops;
}