From mboxrd@z Thu Jan 1 00:00:00 1970 From: mpa@pengutronix.de (Markus Pargmann) Date: Mon, 6 Oct 2014 21:33:36 +0200 Subject: [PATCH 1/2] regulator: imx-anatop: Set default voltage selector for vddpu Message-ID: <1412624017-28673-1-git-send-email-mpa@pengutronix.de> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org 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 --- drivers/regulator/anatop-regulator.c | 8 ++++++++ 1 file changed, 8 insertions(+) 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; } -- 2.1.0