drm/imx: imx-tve: Do not set the regulator voltage
authorFabio Estevam <fabio.estevam@nxp.com>
Wed, 8 Feb 2017 12:47:49 +0000 (10:47 -0200)
committerPhilipp Zabel <p.zabel@pengutronix.de>
Fri, 17 Feb 2017 07:04:26 +0000 (08:04 +0100)
commitfc12bccda8b6f5c38139eceec9e369ed78091b2b
tree78cffad2343f78653f1ae1bcfd3ca3c83da961f6
parent7089db84e356562f8ba737c29e472cc42d530dbc
drm/imx: imx-tve: Do not set the regulator voltage

Commit deb65870b5d9d ("drm/imx: imx-tve: check the value returned by
regulator_set_voltage()") exposes the following probe issue:

63ff0000.tve supply dac not found, using dummy regulator
imx-drm display-subsystem: failed to bind 63ff0000.tve (ops imx_tve_ops): -22

When the 'dac-supply' is not passed in the device tree a dummy regulator is
used and setting its voltage is not allowed.

To fix this issue, do not set the dac-supply voltage inside the driver
and let its voltage be specified in the device tree.

Print a warning if the the 'dac-supply' voltage has a value different
from 2.75V.

Fixes: deb65870b5d9d ("drm/imx: imx-tve: check the value returned by regulator_set_voltage()")
Cc: <stable@vger.kernel.org> # 4.8+
Suggested-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
drivers/gpu/drm/imx/imx-tve.c