From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Luis Henriques To: linux-kernel@vger.kernel.org, stable@vger.kernel.org, kernel-team@lists.ubuntu.com Cc: Markus Pargmann , Mark Brown , Luis Henriques Subject: [PATCH 3.16.y-ckt 007/216] regulator: anatop: Set default voltage selector for vddpu Date: Mon, 12 Jan 2015 18:02:04 +0000 Message-Id: <1421085933-32536-8-git-send-email-luis.henriques@canonical.com> In-Reply-To: <1421085933-32536-1-git-send-email-luis.henriques@canonical.com> References: <1421085933-32536-1-git-send-email-luis.henriques@canonical.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: 3.16.7-ckt4 -stable review patch. If anyone has any objections, please let me know. ------------------ From: Markus Pargmann 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 Signed-off-by: Mark Brown Signed-off-by: Luis Henriques --- 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; } -- 2.1.4